ACLS Axcelis Technologies Inc

XNAS 116.58 Delayed
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Stock quote, options chain, IV rank, technicals, AI analysis, and institutional ownership. Iron condor setups Expected move IV rank history Fibonacci levels Insider trading

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.

ACLS $116.58 —
Key stats
$116.58
Pre-market $110.62 -5.11%
52-Week Range
$73.60 – $193.78
YTD
+35.37%
IV Rank (30D)
36.54
Straddle Price
$19.30
P/C Vol Ratio
1.33
Market Cap
$3.5B
Open
$117.25
Day Range
$115.19 – $119.35
Volume
486,587
Prev Close
$112.93
Fair Value
MODEL: LONG

A blended fair-value estimate combining up to six valuation methods. Each method is weighted by how well it fits the company — DCF down-weights for unprofitable names; DDM only fires for steady dividend payers; comparables down-weight when peer multiples disagree.

  • DCF (quality-aware) — projects free cash flow with a horizon that scales to business quality. True compounders (quality 6/6) get 10 years explicit + 10 years fade before terminal; cyclical/struggling names (quality 0-1) get a 5-year terminal cliff. Quality is scored from ROE, gross margin, growth, FCF margin, debt load, and FCF consistency — the same factors that drive market premium for compounders.
  • Market-Implied Growth (in Model Inputs) — reverse-DCF that answers "what growth rate is the market pricing in?". Lets you sanity-check the deviation: if implied growth is plausible for the business, the model's bearish flag may be wrong; if implausible, the market may be over-extrapolating.
  • DDM (Gordon Growth Dividend Model) — values the stream of future dividends. Only used when trailing yield ≥ 2% and dividend payments are stable — below that the dividend is a token payout and Gordon (which values only the dividend stream) systematically underprices growth names, so those route to DCF + comparables + market anchor instead.
  • P/E, EV/EBITDA, P/B, P/S — applies the peer-group median multiple to this company's per-share metric. Peers come from the same set as the "Related symbols" card. Earnings/sales metrics are forward-tilted by the company's recent revenue growth (capped at 25%) so they're comparable to peers' growth-embedded multiples — mimics how analysts use NTM rather than TTM. Per-multiple weights are biased by company quality (e.g. P/B down-weighted for asset-light tech).
  • Market Anchor (SMA50) — the 50-day moving average, weighted by recent trading-range stability (tighter Bollinger bands → higher weight). Captures information fundamentals miss (forward consensus, sentiment, supply/demand) — but only when recent trading is steady enough that the market has converged on a view. During wild breakouts or breakdowns the anchor's weight collapses.
  • Options Expected (B-L 30d) — the risk-neutral expected stock price at 30-day options expiration, derived from the full implied-volatility surface via Breeden-Litzenberger (second derivative of call price wrt strike → implied PDF, then E[S_T]). Forward-looking, captures all options-implied information (smile, skew, term structure) in one number. Weighted by chain liquidity. SP500-only at present (pre-computed daily). Backtest evidence: adds modest alpha across most bucket × holding combos.
  • Blended value — weighted average. Confidence reflects how many methods fired and how tight peer dispersion is.
  • Deviation pill — green when blended FV ≥ 10% above current price (undervalued); red when ≥ 10% below; grey otherwise.
10-yr Treasury (rf)5.15%
Beta vs SPY1.49
Cost of Equity (CAPM)13.35% (VRP-adj)
WACC13.26%
Volatility Risk Premium+39.7pp (IV − HV30), ERP adj +50bps
Effective Tax Rate12.9%
Rev. Growth (YoY, DCF input)+2.3%
DCF Horizon5 years explicit + fade
Forward Tilt (NTM/TTM)×1.02 (applied to P/E, EV/EBITDA, P/S)
Free Cash Flow (TTM)$0.1B
Return on Equity (TTM)8.7%
Book / Price28.5%
Gross Margin (TTM)43.6%
FCF Margin (TTM)7.8%
Debt / Equity0.04
Quality Score1/6 — cyclical/struggling (5y DCF)
SMA 50$122.44 (Market Anchor value)
SMA 20 / Bollinger Mid$126.65
Bollinger Width / SMA2027.7% (drives anchor stability)
Net Debt$-0.1B
Market Cap$4B
Peers used for multiples: ACMR, BRKR, VECO (filtered from 8 ETF-co-members; sector bias active)
60-Day Conviction
63%
20-Day Fair Value
≈ by Nov 20, 2026
$118.95
α +2.0% rank 44%
conviction
90%
40-Day Fair Value
≈ by Dec 21, 2026
$119.95
α +2.9% rank 41%
conviction
82%
60-Day Fair Value
≈ by Jan 19, 2027
$118.81
α +1.9% rank 33%
conviction
63%
MethodImplied PriceWeightDetail
DCF $23.16 24%
DDM (Gordon) n/a 0%
Peer P/E n/a 0%
Peer EV/EBITDA $92.21 7% median 23.6× · 3 peers
Peer P/B $100.17 7% median 3.0× · 3 peers
Peer P/S $101.30 7% median 3.7× · 3 peers
Market Anchor (SMA50) $122.44 31% stability 64% (BB-width)
Options Expected (B-L 30d) $115.87 24% 41 strikes · skew +0.10
As of 2026-10-22 · updated
About
Industry (SIC)
SPECIAL INDUSTRY MACHINERY, NEC (3559) · industry map
Exchange
XNAS
Market Cap
$3.5B
Employees
1,465
List Date
2000-07-11
CIK
0001113232
Next Earnings
2026-11-03 (After-Close)
EPS Forecast
$0.90 (2 est.)
Headquarters
Beverly, MA
Homepage
https://www.axcelis.com

Axcelis Technologies Inc designs, manufactures, and services ion implantation and other processing equipment used in the fabrication of semiconductor chips. In addition to equipment, the company provides aftermarket lifecycle products and services, including used tools, spare parts, equipment upgrades, maintenance services, and customer training. Geographically, the group has a business presence in North America, Asia Pacific, and Europe, of which key revenue is derived from the Asia Pacific.

Summary
—
composite
—
No summary data available for this symbol yet.

Each spoke is this symbol's rank within its sector (0–100; the dotted ring marks the sector median at 50). Higher is more constructive for a long. One spoke — News sentiment — is an absolute reading, not a sector rank. Grayed spokes have no data. A fuller shape is a summary, not a recommendation.

Chart
Seasonality
Month'21'22'23'24'25'26Avg
Jan19.72%-18.44%40.60%4.27%-3.13%2.26%7.55%
Feb1.99%9.40%11.63%-13.79%-16.61%-6.98%-2.39%
Mar3.48%13.22%0.76%-4.09%-9.48%7.51%1.90%
Apr-12.75%-23.90%-10.66%-7.89%-2.66%45.65%-2.04%
May-1.40%10.80%28.00%10.61%14.72%7.44%11.70%
Jun-3.02%-10.42%13.10%27.48%23.43%25.95%12.75%
Jul-3.17%46.67%10.31%-10.19%-5.97%-27.19%1.74%
Aug28.92%-4.63%-2.07%-3.09%16.42%-12.04%3.92%
Sep-3.19%-4.70%-15.47%3.77%22.66%19.16%3.71%
Oct14.89%-8.30%-21.60%-16.17%-16.04%-14.72%*-10.32%
Nov9.03%35.91%-2.53%-13.76%0.04%--5.74%
Dec17.45%0.19%3.04%-9.58%-1.44%--1.93%
Total87.43%27.01%47.06%-33.89%12.03%31.18%28.47%
Technical Indicators

Quick-reference for reading the values below. Indicators combine to confirm a view — no single one is a trade signal on its own.

Trend Indicators
  • SMA 20 / 50 / 200 — price above = uptrend, below = downtrend. SMA 50 crossing SMA 200 is the golden/death cross.
  • EMA 12 / 26 — faster-reacting averages; 12 above 26 is short-term bullish.
  • MACD — bullish when MACD > signal (green badge), bearish when below. Divergence from price often precedes reversals.
  • ADX (14) — trend strength regardless of direction. <20 range, 20–25 weak trend, 25–50 trend, >50 strong trend.
  • +DI / −DI — +DI > −DI favors bulls; the reverse favors bears. Read alongside ADX.
Momentum Oscillators
  • RSI (14) — <30 oversold, >70 overbought. 40–60 is neutral; trending names can stay extreme.
  • Stochastic %K / %D — <20 oversold, >80 overbought. %K crossing %D is an early momentum signal.
  • Williams %R — inverted scale: <−80 oversold, >−20 overbought.

Oscillators work best in range-bound markets; in strong trends they give premature reversal signals.

Volume & Volatility
  • Bollinger Bands — price at upper band = overbought, lower = oversold. Narrow bands (squeeze) often precede expansion.
  • OBV — cumulative volume; rising OBV confirms uptrend, falling OBV confirms downtrend. Divergence from price is a warning.
  • Vol SMA 20 / Vol ROC — today's volume vs. 20-day average. Positive ROC with price move = conviction.
  • ATR / True Range — average daily $ move; sizing and stop-loss reference.
  • HV 20 / 30 / 60 — realized (historical) volatility. Compare to IV on the options cards: IV > HV = rich premium.

Confluence matters: trend + momentum + volume agreeing carries far more weight than any single indicator. For how these feed the spread scanner score, see the algorithm docs →

Trend Indicators

SMA 20: $126.65
SMA 50: $122.44
SMA 200: $122.62
Current: $116.58
EMA 12: $119.98
EMA 26: $122.35
MACD: -2.3697 | Signal: -2.3811
BULLISH
ADX (14): 23.59
WEAK TREND
+DI: 23.91
−DI: 32.88

Momentum Oscillators

RSI (14): 44.27
NEUTRAL
Stoch %K: 14.70
Stoch %D: 9.54
Williams %R: -77.33

Volume & Volatility

BB Upper: $148.88
BB Lower: $104.41
NEUTRAL
OBV: -7,345,333
Vol SMA 20: 331,177
Vol ROC: 74.02%
ATR: $6.38
True Range: $6.42
HV 20: 62.1%
HV 30: 58.5%
HV 60: 62.7%

Data Summary

Data Points: 500
Last Updated:
Date Range: 2024-10-23T00:00:00 – 2026-10-21T00:00:00
AI Analysis

LLM Stock Analysis Report

SYMBOL: ACLS

Executive Summary BULLISH (Confidence Level: 8/10)

Key Drivers:

  • Bullish MACD signal
  • Positive sentiment from recent news headlines
  • Strong technical momentum indicators

Primary Risks:

  • High volatility, which may lead to increased risk of significant price moves
  • Unusual options activity that could impact the stock's price action

Investment Thesis: ACLS is poised for a continued uptrend due to its strong technical signals and positive sentiment from recent news headlines. The stock has shown momentum in its recent price action, and the MACD signal suggests that this trend may continue.

Recent News Sentiment Impact: The recent news headlines have been predominantly positive, with Veeco's merger announcement and NuScale Power's interesting profile contributing to a bullish narrative. These headlines have likely influenced investor sentiment and contributed to the stock's upward momentum.

Technical Analysis

Trend Direction:

  • Short-term: Bullish
  • Medium-term: Bullish
  • Long-term: Bullish

Support/Resistance Levels: The 20-period SMA at $155.72 acts as a key support level, while the upper Bollinger Band at $168.07 serves as resistance.

Momentum Signals:

  • RSI: Neutral (53.61)
  • MACD: Bullish
  • Bollinger Bands: Neutral

Volume Analysis: The volume indicators suggest that institutional interest is increasing, with the OBV and Volume Rate of Change both indicating a bullish trend.

News & Sentiment Analysis

Recent Headlines Summary: The recent news headlines have been focused on merger announcements and positive sentiment for the semiconductor industry.

Sentiment Assessment: The overall sentiment is Positive (7/10).

Catalyst Identification: The upcoming earnings release may serve as a catalyst, given the strong technical momentum and positive sentiment.

Market Narrative: The market narrative suggests that ACLS is benefiting from its strong technical signals and positive news headlines, which have contributed to its upward momentum.

Risk & Volatility Assessment

Risk Assessment: The stock's high volatility (beta: 2.23) and unusual options activity may increase the risk of significant price moves.

Volatility Regime: The current volatility level is high relative to historical levels.

Options Market Signals: The IV rank is low, indicating that volatility is historically low. The put-call volume ratio suggests a bullish sentiment.

Downside Protection: The support level at $155.72 provides some downside protection, but the risk of a significant price move remains.

Market Context & Positioning

Sector Performance: The semiconductor sector has been performing well recently, which may contribute to ACLS's upward momentum.

Institutional Activity: The institutional interest is increasing, as suggested by the volume indicators.

Correlation Analysis: The stock's correlation with the market (R-squared: 0.47) suggests that it is moving in tandem with the broader market.

Relative Valuation: ACLS is positioned within a trading range, which may provide some support and resistance levels for the stock.

Key Levels & Action Items

Critical Price Levels:

  • Support at $155.72
  • Resistance at $168.07

Breakout/Breakdown Levels:

  • Breakout above $168.07 could lead to further upside
  • Breakdown below $143.37 could result in a significant decline

Time-Sensitive Catalysts: The upcoming earnings release may serve as a catalyst.

Risk Management: A stop-loss level at $153.50 and position sizing considerations are recommended.

By analyzing the technical indicators, news headlines, and risk metrics, we believe that ACLS is poised for continued upward momentum. However, the high volatility and unusual options activity do increase the risk of significant price moves. As such, it's essential to closely monitor the stock's price action and consider implementing risk management strategies.

Generated
Earnings History
20 of 23 under expected move
Avg Expected Move
11.69%
Avg Actual Move
5.67%
Each row pairs the pre-earnings straddle-implied expected move with the realized close-to-close move. Sorted oldest first.
Earnings Date Timing Expected Move Actual Move Ratio Outcome
2021-02-10 After-Close 11.67% 0.93% 0.08x Within
2021-05-04 After-Close 10.74% 2.13% 0.20x Within
2021-08-04 After-Close 9.04% 12.76% 1.41x Exceeded
2021-11-03 After-Close 6.22% 1.91% 0.31x Within
2022-02-07 After-Close 12.07% 6.39% 0.53x Within
2022-05-04 After-Close 12.36% 5.86% 0.47x Within
2022-08-03 After-Close 11.16% 8.07% 0.72x Within
2022-11-02 After-Close 16.91% 4.32% 0.26x Within
2023-02-08 After-Close 8.76% 5.82% 0.66x Within
2023-05-03 After-Close 11.20% 7.40% 0.66x Within
2023-08-02 After-Close 11.61% 1.27% 0.11x Within
2023-11-01 After-Close 11.88% 0.42% 0.04x Within
2024-02-07 After-Close 10.08% 7.03% 0.70x Within
2024-05-01 After-Close 11.01% 4.86% 0.44x Within
2024-07-31 After-Close 13.10% 10.71% 0.82x Within
2024-11-06 After-Close 15.12% 0.97% 0.06x Within
2025-02-10 After-Close 11.25% 12.25% 1.09x Exceeded
2025-05-06 Pre-Market 14.78% 4.99% 0.34x Within
2025-08-05 After-Close 7.15% 2.94% 0.41x Within
2025-11-04 Pre-Market 14.56% 2.70% 0.19x Within
2026-02-17 After-Close 9.39% 16.74% 1.78x Exceeded
2026-05-07 Pre-Market 13.25% 7.22% 0.54x Within
2026-08-06 After-Close 15.59% 2.64% 0.17x Within

Earnings calendar: this week’s reports with expected vs actual moves →

ACLS Options Activity & IV Rank

ACLS IV rank history, 52-week IV rank and IV percentile →

Volatility Metrics

Current IV: 72.4%
7-DTE IV: —
Expected Move: $19.30
7-DTE Move: $19.30
Days to Exp: 30 (2026-11-20)

Options Flow

Call Volume: 166
Put Volume: 221
P/C Volume: 1.331
BEARISH
Call OI: 1,746
Put OI: 694
P/C OI: 0.397
Total OI: 2,440

ATM Options Pricing

ATM Call: $10.85
ATM Put: $8.45
Call %: 9.3%
Put %: 7.2%

Chain Summary

Chain Volume: 989
Chain OI: 5,999
Last Updated: 10/21/2026
Spread Scanner GPU

Each spread is ranked by a composite score built in three stages. Full documentation →

Stage 1 — Base Score (GPU scanner)

score = P(profit) × (credit / spread_width)
P(profit) from short leg delta (1 − |delta|), penalised above 85%. Credit uses mid-price to handle illiquid chains fairly.

Stage 2 — Skew Adjustment (±25% cap)

RR and BF (30-delta) from the persisted per-symbol skew snapshot — wing strikes picked by real greeks.delta, not a moneyness proxy. Put skew boosts bull puts, penalises bear calls. High butterfly boosts iron condors. Calendars are skew-neutral.

Stage 3 — Technical Overlay (±50% cap, 5 groups)
Group 1 · Directional Bias (±0.25)
  • RSI <40 bullish / >60 bearish
  • MACD crossover + histogram trend
  • Price vs SMA 50 & SMA 200
Group 2 · Momentum (±0.10)
  • Stochastic %K <20 / >80
  • Williams %R <−80 / >−20
Group 3 · Volatility (up to −0.25 / +0.15)
  • Blended ATR + straddle expected-move penalty
  • Bollinger Band signal (+ counter-trend penalty)
  • BB width — vol contraction boost for ICs
Group 4 · IV Regime (±0.15)
  • IV rank ≥ 75 → strong boost for credit spreads
  • IV rank < 25 → penalty (selling cheap vol)
Group 5 · Liquidity (penalty up to −0.10)
  • Min open interest across all legs
  • OI < 100 → −0.10 · OI < 500 → −0.05

score = base_score × skew_multiplier × tech_multiplier
Both multipliers are shown per spread. Beta is informational only — ATR already captures realized vol. Full algorithm documentation →

Enter a ticker to scan for optimal spread opportunities.

Evaluates all bull put, bear call, iron condor, and calendar spread combinations using GPU-accelerated analysis.

Dealer Positioning
TYPICAL γ

Estimated net dealer gamma is at the 61st percentile of this name's own daily history, within its typical range. This describes current positioning; it is not a forecast or a trading signal.

Gamma percentile
61%
vs own history
GEX tilt
+0.33
OI-weighted, today
Vanna tilt
+0.45
δ-sensitivity to IV
Charm tilt
-0.48
δ-decay vs time
Vanna tilt +0.45: the estimated dealer exposure leans positive, so the modeled hedge would shift noticeably if implied volatility changed.
Charm tilt -0.48: the estimated dealer exposure leans negative, so the modeled hedge would shift noticeably as time passes and options approach expiry.

Net dealer gamma is an estimate of the aggregate gamma held by options market makers across this name's option chain, weighted by open interest. Dealer positions aren't public, so it uses a standard simplifying assumption: dealers are treated as long the calls and short the puts that are open. Actual dealer books can differ.

Gamma percentile ranks today's estimate against this name's own daily history, from 0% (the lowest reading on record) to 100% (the highest). Raw gamma scales with how much open interest a chain carries, so it isn't comparable across names; the percentile is. The badge marks the bottom 20% as low and the top 20% as high.

Tilts run from −1 to +1 and show how lopsided the estimated dealer exposure is. GEX tilt compares call gamma with put gamma. Vanna tilt describes how the hedge would shift if implied volatility changed, and charm tilt how it would shift with the passage of time.

This card describes estimated positioning and where it sits historically. It is not a forecast of price direction or volatility and not a trading signal. Market-wide view: Dealer positioning screener.

· 23 ATM contracts, 1k total OI
Skew (Wing IV − ATM IV)
DTE:
Wing Δ:
Metric:
Wing vs ATM
IV(put wing) − IV(ATM), in vol points

How much the OTM put trades above (or below) the at-the-money strike. Measures the height of the put-side tail relative to ATM — i.e. how expensive crash insurance is on this name.

  • Positive (typical) — wing IV > ATM IV. Standard equity put skew: portfolios bid up crash protection, so OTM puts trade richer than ATM.
  • Near zero or negative (unusual) — wing IV ≤ ATM IV. Flat or inverted put side. Common when there's no fear demand, in tightly mean-reverting names, or right after an earnings catalyst clears.
  • Percentile vs own 3-yr history: high = wings rich (good time to sell wing premium); low = wings cheap (good time to buy protection).
  • Not directional — high or low wings don't predict up or down moves. It's a price tag on tail insurance, not a forecast.
Risk Reversal
IV(call wing) − IV(put wing), equal delta on each side

Which side of the smile is the market paying up for? Measures the tilt of the surface — call skew vs put skew at matched deltas.

  • Negative (typical) — puts richer than calls. Standard equity behavior: hedging demand makes puts carry a premium. Most large-caps sit in the −1 to −5 vol-point range.
  • Strongly negative (< −5 pts) — heavy downside hedging, elevated fear, or an upcoming catalyst (earnings, FDA, macro event). Worth flagging.
  • Positive — calls richer than puts. Unusual for equities; signals bullish momentum, short-squeeze positioning, or takeover/M&A speculation.
  • Near zero — symmetric surface. Market sees roughly equal up/down risk. Rare for large-caps; more common in commodities and FX.
Reading them together

Wing-vs-ATM tells you how expensive the tails are. Risk Reversal tells you which side is favored. Combined:

  • High wing percentile + deeply negative RR → strong put bid; stress or major event priced in. Owning protection costs a premium; selling put premium is dangerous.
  • Low wing percentile + near-zero RR → complacency; insurance cheap and balanced. Good environment to add cheap downside hedges.
  • Positive RR + elevated wings → call-side fear-of-missing-out; common in squeeze setups. Upside calls expensive, downside puts not bid.
14 DTE / 10d —
— pts EXTREME
as of Oct 21 · No data
30 DTE / 10d 1%
-4.2 pts EXTREME
as of Oct 21 · ATM 72.5% / Wing 68.3%

Percentile is the rank of today's reading within ~3 years of this symbol's own history. High percentile = wings are rich relative to history; not a directional signal. Skew is read off the chain in real time, not from CBOE SKEW.

Volatility Surface

Enter a ticker to render the implied volatility surface.

Volatility Smile

Enter a ticker to render the implied volatility smile.

IV Rank (7 DTE)
IV Rank (30 DTE)36.5MediumOct 21
Straddle Price (30 DTE)$19.30Oct 21
Beta Analysis

Risk Metrics

Beta: 2.7382
Alpha: 16.16%
Correlation: 0.5075
R-Squared: 25.8%
Stock Volatility: 68.5%
Market Volatility: 12.7%

Analysis Details

Benchmark: SPY
Data Points: 251
Period: 252 trading days
Interpretation:
High volatility - stock moves more than market
Beta & Alpha Over Time
Notable investors who own ACLS
4 of 37 tracked investors
InvestorValueShare of their portfolioRankQ/Q sharesSource
Millennium Management Hedge fund
Izzy Englander
$26.4M
0.02%
#961 of 3716+1011.1%13F
Citadel Hedge fund
Ken Griffin
$8.8M
0.01%
#1685 of 6285+926.4%13F
Rockefeller Capital Management Family office
Rockefeller family
$987K
0.00%
#1704 of 4729+486.5%13F
Point72 Hedge fund
Steve Cohen
$568K
0.00%
#1613 of 1945+33.3%13F

Hedge funds, activists, holding companies and family offices we track, from their latest 13F (quarter-end value) and Form 4 filings in the last 3 years. Family offices · all institutions

ACLS Institutional Ownership (13F)

Latest filings — 2026-09-30
Diluted shares outstanding: 31,495,000 (as of 2026-03-31)

Institutional managers with $100M+ AUM file Form 13F-HR quarterly, due 45 days after quarter end. Holdings are reported gross at quarter-end market value — they are a snapshot, not a real-time position.

  • Shares — long equity positions in this name, aggregated across share classes.
  • Calls / Puts — notional value of long call / put exposure where this ticker is the underlying.
  • % of Float — holder's reported shares divided by the latest diluted shares outstanding. Sums above 100% indicate large custodian / prime broker positions where the same shares are reported by multiple filers.
  • Custodian badge — filers with more than 5,000 holdings are typically broker-dealers / custodians reporting customer-held shares, not active managers.

Each filer is counted once at its latest 13F-HR filing. New filings are ingested on a weekly cadence.

447 filers35,279,935 shares$6.15B value112.02% of float
# Filer Shares Value % of Total % of Float Period
1 BlackRock, Inc. Custodian 5,029,462 $952.83M 15.49% 15.97% 2026-06-30
2 FMR LLC Custodian 4,125,902 $781.65M 12.70% 13.10% 2026-06-30
3 Vanguard Portfolio Management LLC 2,478,878 $469.62M 7.63% 7.87% 2026-06-30
4 Vanguard Group Inc Custodian 4,122,529 $331.20M 5.38% 13.09% 2025-12-31
5 Vanguard Capital Management LLC 1,386,518 $262.68M 4.27% 4.40% 2026-06-30
6 State Street Corp 1,231,109 $233.18M 3.79% 3.91% 2026-06-30
7 Victory Capital Management Inc. 1,134,007 $214.84M 3.49% 3.60% 2026-06-30
8 Geode Capital Management, LLC Custodian 833,607 $157.96M 2.57% 2.65% 2026-06-30
9 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 803,151 $152.16M 2.47% 2.55% 2026-06-30
10 REINHART PARTNERS, LLC. 1,060,636 $139.13M 2.26% 3.37% 2026-09-30
11 Dimensional Fund Advisors LP Custodian 709,266 $134.35M 2.18% 2.25% 2026-06-30
12 Balyasny Asset Management L.P. 616,196 $116.74M 1.90% 1.96% 2026-06-30
13 PRIMECAP Management Co 610,451 $115.65M 1.88% 1.94% 2026-06-30
14 Invesco Ltd. Custodian 527,724 $99.98M 1.62% 1.68% 2026-06-30
15 Charles Schwab Investment Management, Inc. 416,230 $78.85M 1.28% 1.32% 2026-06-30
16 T. Rowe Price Associates, Inc. 394,455 $74.73M 1.21% 1.25% 2026-06-30
17 BARROW HANLEY MEWHINNEY & STRAUSS LLC 392,240 $74.31M 1.21% 1.25% 2026-06-30
18 The Manufacturers Life Insurance Company 383,760 $72.70M 1.18% 1.22% 2026-06-30
19 Northern Trust Corp Custodian 382,027 $72.38M 1.18% 1.21% 2026-06-30
20 American Century Companies, Inc. 369,879 $70.07M 1.14% 1.17% 2026-06-30
21 Morgan Stanley Custodian 366,077 $69.35M 1.13% 1.16% 2026-06-30
22 Boston Trust Walden Corp 359,256 $68.06M 1.11% 1.14% 2026-06-30
23 EMERALD ADVISERS, LLC 330,469 $62.61M 1.02% 1.05% 2026-06-30
24 UBS Group AG Custodian 320,891 $60.79M 0.99% 1.02% 2026-06-30
25 Boston Partners 303,929 $55.65M 0.90% 0.96% 2026-06-30
14 filers$138.48M notional
# Filer Notional Value % of Total Period
1 Jane Street Group, LLC Custodian $55.43M 40.03% 2026-06-30
2 Susquehanna International Group, LLP Custodian $31.73M 22.92% 2026-06-30
3 IMC-Chicago, LLC Custodian $21.84M 15.77% 2026-06-30
4 Citadel Advisors LLC Custodian $16.58M 11.97% 2026-06-30
5 Wolverine Trading, LLC Custodian $3.63M 2.62% 2025-09-30
6 Millennium Management LLC Custodian $3.47M 2.50% 2026-06-30
7 Squarepoint Ops LLC $2.48M 1.79% 2026-06-30
8 D. E. Shaw & Co., Inc. Custodian $1.63M 1.18% 2026-06-30
9 Two Sigma Investments, LP Custodian $682.02K 0.49% 2026-06-30
10 Simplex Trading, LLC Custodian $378.90K 0.27% 2026-06-30
11 Walleye Trading LLC $341.01K 0.25% 2026-06-30
12 EQUITEC PROPRIETARY MARKETS, LLC $151.56K 0.11% 2026-06-30
13 Walleye Capital LLC $113.67K 0.08% 2026-06-30
14 GROUP ONE TRADING LLC Custodian $18.95K 0.01% 2026-06-30
12 filers$42.21M notional
# Filer Notional Value % of Total Period
1 Jane Street Group, LLC Custodian $18.00M 42.64% 2026-06-30
2 Susquehanna International Group, LLP Custodian $6.46M 15.31% 2026-06-30
3 IMC-Chicago, LLC Custodian $5.76M 13.65% 2026-06-30
4 Citadel Advisors LLC Custodian $5.15M 12.21% 2026-06-30
5 Squarepoint Ops LLC $3.64M 8.62% 2026-06-30
6 Wolverine Trading, LLC Custodian $1.27M 3.00% 2025-09-30
7 Two Sigma Investments, LP Custodian $890.41K 2.11% 2026-06-30
8 Barclays PLC Custodian $341.01K 0.81% 2026-06-30
9 Walleye Capital LLC $341.01K 0.81% 2026-06-30
10 Walleye Trading LLC $189.45K 0.45% 2026-06-30
11 CSS LLC/IL $94.72K 0.22% 2026-06-30
12 Simplex Trading, LLC Custodian $75.78K 0.18% 2026-06-30

ACLS Insider Trading (Form 4)

Latest: 2026-09-16
Form 4 filings — insider beneficial-ownership changes by officers, directors, and 10%+ holders. Filed within 2 business days of transaction.
Filed Reporter Role Action Shares Avg Price Net $ Link
2026-09-16 Greg Redinbo EVP and Chief Strategy Officer Tax (F) −208 $105.04 -$21.8K EDGAR
2026-09-16 Christopher Tatnall EVP Global Customer Operations Tax (F) −136 $105.04 -$14.3K EDGAR
2026-07-17 David Ryzhik SVP Interim CFO Tax (F) −221 $145.01 -$32.0K EDGAR
2026-06-17 David Ryzhik SVP Interim CFO Tax (F) −76 $176.84 -$13.4K EDGAR
2026-06-16 Gerald M Blumenstock EVP, Research, Dev. & Eng. Tax (F) −506 $191.60 -$96.9K EDGAR
2026-06-04 Necip Sayiner Director Sell (S) −1,586 $157.44 -$249.7K EDGAR
2026-06-03 Robert John Mahoney EVP Global Operations Sell (S) −1,155 $155.24 -$179.3K EDGAR
2026-05-28 Todd Sutton VP Corporate Controller Sell (S) −2,000 $159.99 -$320.0K EDGAR
2026-05-26 Thomas St Dennis Director Sell (S) −900 $155.37 -$139.8K EDGAR
2026-05-22 Eileen Evans EVP, General Counsel and Sec'y Sell (S) −926 $155.51 -$144.0K EDGAR
2026-05-22 Gerald M Blumenstock EVP, Research, Dev. & Eng. Sell (S) −1,161 $152.70 -$177.3K EDGAR
2026-05-21 Christopher Tatnall EVP Global Customer Operations Sell (S) −1,166 $149.75 -$174.6K EDGAR
2026-05-20 Jeanne Quirk Director Sell (S) −1,789 $140.22 -$250.9K EDGAR
2026-05-20 Todd Sutton VP Corporate Controller Tax (F) −184 $146.24 -$26.9K EDGAR
2026-05-20 John T Kurtzweil Director Sell (S) −3,500 $138.79 -$485.8K EDGAR
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (described in filing footnote — typically 401(k), trust, inheritance) · W = will/inheritance. Only P / S codes carry directional signal.

ACLS Insider Holdings

17 insiders · @ $116.58
Officers, directors, and 10%+ owners who have filed a Form 4 in the past two years, ranked by current disclosed exposure (shares × today's price). Shares are direct + indirect (via trusts / LLCs / spouse). Excludes unvested RSU and option grants — those aren't beneficially owned until vest.
# Insider Role Shares Disclosed Exposure Lifetime OM Net Filings Last Filed
1 Russell Low PRESIDENT AND CEO 154,900 $18.06M -$7.33M 42 2026-05-20
2 James Gordon Coogan EVP AND CFO 37,144 $4.33M $11.2K 9 2026-03-03
3 Greg Redinbo EVP and Chief Strategy Officer 34,816 $4.06M -$706.8K 21 2026-09-16
4 John T Kurtzweil Director 32,990 $3.85M -$1.85M 27 2026-05-20
5 Eileen Evans EVP, General Counsel and Sec'y 31,295 $3.65M -$144.0K 5 2026-05-22
6 Christopher Tatnall EVP Global Customer Operations 27,491 $3.20M -$174.6K 13 2026-09-16
7 Lynnette C Fallon EXECUTIVE VP, HR/LEGAL 27,323 $3.19M -$12.77M 73 2025-01-07
8 Gerald M Blumenstock EVP, Research, Dev. & Eng. 19,987 $2.33M -$613.5K 12 2026-06-16
9 Thomas St Dennis Director 17,695 $2.06M -$2.80M 22 2026-05-26
10 Robert John Mahoney EVP Global Operations 14,410 $1.68M -$542.8K 6 2026-06-03
Lifetime OM Net = signed sum of open-market buys (P) and sells (S) over their career; excludes grants, tax withholdings, and dispositions to issuer. A large negative number is normal for long-tenured executives — they've sold compensation grants over many years.

ACLS Board & Officers

As of SEC filings through Sep 16, 2026

Directors 8

Officers 8

Changes in the last 10 years (28)
Mar 12, 2026Todd Sutton became VP Corporate Controller
Mar 12, 2026David Ryzhik became SVP Interim CFO
Mar 10, 2026The company announced the departure of James Gordon Coogan as EVP and CFO in an SEC filing
Dec 19, 2025Robert John Mahoney became EVP Global Operations
Mar 4, 2025Gerald M Blumenstock listed as EVP, Research, Dev. & Eng. (previously EVP, Engineering) in SEC filings
Jan 7, 2025Lynnette C Fallon reported in an SEC filing no longer being Executive VP, Hr/legal and Gen
Dec 12, 2024Eileen Evans became EVP, General Counsel and Sec'y
Jun 24, 2024Douglas A. Lawson reported in an SEC filing no longer being EVP, Corporate Mktg & Strategy
May 13, 2024Mary G Puma reported in an SEC filing no longer being a director
May 13, 2024Mary G Puma reported in an SEC filing no longer being Executive Chairperson
Mar 1, 2024Lynnette C Fallon listed as Executive VP, Hr/legal and Gen (previously Executive VP, HR/Legal) in SEC filings
Feb 28, 2024Necip Sayiner became a director
Feb 28, 2024Gregory B Graves became a director
Sep 29, 2023James Gordon Coogan became EVP and CFO
Sep 5, 2023The company announced the departure of Kevin J Brewer as EVP & Chief Financial Officer in an SEC filing
Sep 1, 2023Christopher Tatnall became EVP Global Customer Operations
Jun 12, 2023Gerald M Blumenstock became EVP, Engineering
May 16, 2023Russell Low listed as President and CEO (previously EVP, Global Cust & Eng Ops) in SEC filings
May 16, 2023Russell Low first listed as a director in an SEC filing
May 11, 2023Mary G Puma listed as Executive Chairperson (previously President and CEO) in SEC filings
Not reported recently (9)
  • Dipti Vachani · Last reported as a director in an SEC filing dated May 16, 2024
  • Joseph P Keithley · Last reported as a director in an SEC filing dated Dec 14, 2023
  • William J Bintz · Last reported as EVP, Product Development in an SEC filing dated Nov 23, 2022
  • Richard J Faubert · Last reported as a director in an SEC filing dated Aug 12, 2022
  • Arthur L George Jr · Last reported as a director in an SEC filing dated May 10, 2022
  • John E Aldeborgh · Last reported as EVP, Customer Operations in an SEC filing dated Feb 18, 2021
  • R John Fletcher · Last reported as a director in an SEC filing dated Feb 17, 2021
  • Patrick H Nettles · Last reported as a director in an SEC filing dated May 17, 2017
  • Barbara J Lundberg · Last reported as a director in an SEC filing dated Dec 13, 2016
Compiled from SEC filings by the company and its directors and officers. Dates are as stated in those filings. Where no filing says when someone left, we show the last filing that listed them.

ACLS Proposed Insider Sales (Form 144)

Latest: 2026-06-03
Last 30d: 0 filings  ·  Last 90d: 0 filings

What is Form 144? A notice of intent to sell restricted or control stock under Rule 144. Affiliates (officers, directors, 10%+ owners) and holders of restricted shares must file Form 144 when planning to sell more than 5,000 shares or $50,000 in any 3-month rolling window.

How it relates to Form 4: Form 144 is filed before the trade (up to 90 days in advance); Form 4 is filed within 2 business days after the trade executes. Not every Form 144 results in a sale — the filer may cancel or delay. Look for the corresponding Form 4 on the Insider Activity card to confirm a sale actually happened.

10b5-1 plans: Trades made under a pre-scheduled Rule 10b5-1 plan are not discretionary — they execute automatically on dates set months earlier, regardless of news. High 10b5-1 percentages mean less per-filing signal value, though cumulative selling volume still matters.

"Notice value": Aggregate market value the filer wrote into the Form 144 — i.e. the size of the planned sale, not necessarily the executed dollars. An amended notice (Form 144/A) replaces the original it amends, and cancelled notices are dropped, so neither is double-counted above. A filed value that is clearly inconsistent with the share count at the stock's price (a filer typo) shows as a dash and is left out of the totals.

Source & freshness: Sourced from public Form 144 filings. Refreshed daily; new filings typically appear here the morning after they are filed.

Filed Filer Role Shares Notice Value Planned Sale Broker Plan Link
2026-06-03 NECIP SAYINER Director 1,586 $249.7K 2026-06-03 Morgan Stanley Smith Barney LLC … — EDGAR
2026-06-02 ROBERT MAHONEY Officer 1,155 $179.3K 2026-06-02 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-27 TODD SUTTON Officer 2,000 $320.0K 2026-05-27 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-22 THOMAS M. ST. DENNIS Director 900 $139.8K 2026-05-22 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-22 EILEEN EVANS Officer 926 $144.0K 2026-05-22 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-21 GERALD BLUMENSTOCK Officer 1,161 $177.3K 2026-05-21 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-20 CHRISTOPHER TATNALL Officer 1,166 $174.6K 2026-05-20 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-19 JOHN THOMAS KURTZWEIL Director 3,500 $485.8K 2026-05-19 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-19 JEANNE QUIRK Director 1,789 $250.9K 2026-05-19 Morgan Stanley Smith Barney LLC … — EDGAR
2026-05-19 GREGORY GRAVES Director 3,225 $456.7K 2026-05-19 Morgan Stanley Smith Barney LLC … — EDGAR
Notice value is the aggregate market value the filer states they intend to sell — not a confirmed transaction. Compare to Insider Activity (Form 4) to see which planned sales actually executed. Market-wide feed: Planned sales (Form 144).
ETF Holders
118 ETFs hold ACLS
25 shown · $1.01B total exposure · 0.17% AUM-weighted avg weight
# ETF Provider Weight $ Exposure ETF AUM As Of
1 IJR iShares Core S&P Small-Cap ETF iShares (BlackRock) 0.20% $207.7M $103.1B 2026-10-20
2 VTI Vanguard Morningstar Total Stock Market ETF Vanguard 0.01% $128.9M — 2026-09-30
3 VGT Vanguard Information Technology ETF Vanguard 0.05% $97.7M — 2026-09-30
4 VB Vanguard Morningstar Small-Cap ETF Vanguard 0.05% $91.2M — 2026-09-30
5 IWM iShares Russell 2000 ETF iShares (BlackRock) 0.12% $90.2M $75.1B 2026-10-20
6 VBR Vanguard Morningstar Small-Cap Value ETF Vanguard 0.09% $59.3M — 2026-09-30
7 VXF Vanguard Extended Market ETF Vanguard 0.05% $45.6M — 2026-09-30
8 IWO iShares Russell 2000 Growth ETF iShares (BlackRock) 0.24% $32.7M $13.6B 2026-10-20
9 SPSM State Street® SPDR® Portfolio S&P 600™ Small Cap ETF SPDR (State Street) 0.20% $31.8M $15.7B 2026-10-20
10 DFAS Dimensional US Small Cap ETF Dimensional 0.08% $27.5M — 2026-10-20
11 VTWO Vanguard Russell 2000 ETF Vanguard 0.14% $23.9M — 2026-09-30
12 SCHA Schwab U.S. Small-Cap ETF Nport 0.10% $22.2M — 2026-05-31
13 IJT iShares S&P Small-Cap 600 Growth ETF iShares (BlackRock) 0.27% $20.6M $7.6B 2026-10-20
14 VIOO Vanguard S&P Small-Cap 600 ETF Vanguard 0.23% $14.3M — 2026-09-30
15 PSC Principal U.S. Small-Cap ETF Nport 0.55% $12.7M — 2026-06-30
16 SLYG State Street® SPDR® S&P 600™ Small Cap Growth ETF SPDR (State Street) 0.27% $12.7M $4.6B 2026-10-20
17 FNDA Schwab Fundamental U.S. Small Company ETF Nport 0.14% $12.3M — 2026-05-31
18 DFAC Dimensional US Core Equity 2 ETF Dimensional 0.01% $11.4M — 2026-10-20
19 FTEC Fidelity MSCI Information Technology Index ETF Fidelity 0.05% $10.9M $21.3B 2026-10-20
20 DFMC Dimensional US Micro Cap ETF Dimensional 0.14% $10.7M — 2026-10-20
21 IJS iShares S&P Small-Cap 600 Value ETF iShares (BlackRock) 0.14% $10.4M $7.6B 2026-10-20
22 PTF Invesco Dorsey Wright Technology Momentum ETF Nport 1.69% $9.9M — 2026-07-31
23 FFSM Fidelity Fundamental Small-Mid Cap ETF Nport 0.63% $9.5M — 2026-07-31
24 DFAT Dimensional US Targeted Value ETF Dimensional 0.03% $9.5M — 2026-10-20
25 FESM Fidelity Enhanced Small Cap Core ETF Fidelity 0.12% $8.1M $6.6B 2026-10-20
Fundamentals

Quarterly filings sourced from SEC 10-Q / 10-K reports. TTM tiles aggregate the most recent four quarters; bars show the last ~12 quarters oldest → newest.

Metrics
  • Revenue — top-line sales. Look for consistent YoY growth; seasonal businesses need same-quarter comparisons (Q4 '24 vs Q4 '23).
  • Net Income — bottom-line profit after all expenses. Can be volatile from one-time items; red bars = net loss.
  • Diluted EPS — net income per share assuming options/converts are exercised. Direct input to the P/E ratio.
  • Operating Cash Flow — cash generated from core operations, before capex and financing. Harder to manipulate than net income; growing OCF is a quality signal.
How to read the bars
  • Sequential growth — quarter-over-quarter trend. Accelerating bars are a momentum signal.
  • YoY growth — compare to the same quarter a year earlier to remove seasonality.
  • Quality — OCF should roughly track Net Income over time. Large divergence (net income ≫ OCF) flags accruals risk.
  • Margins — scan the bar ratios: Net Income / Revenue tells you margin trend without needing a separate chart.

TTM (trailing-twelve-month) smooths seasonality and is used for the P/E calculation. Filings appear 30–90 days after the period closes.

Trailing P/E
—
TTM Diluted EPS
$3.21
TTM Revenue
$845.44M
TTM Net Income
$100.87M
TTM Op. Cash Flow
$96.65M
Quarterly figures (12 quarters)
QuarterPeriod EndRevenueNet IncomeDiluted EPSOp. Cash Flow
Q1 '262026-03-31$198.96M$9.21M$0.30$18.14M
Q4 '252025-12-31$238.33M$34.30M$1.10$-6.57M
Q3 '252025-09-30$213.61M$25.99M$0.83$45.35M
Q2 '252025-06-30$194.54M$31.38M$0.98$39.73M
Q1 '252025-03-31$192.56M$28.58M$0.88$39.80M
Q4 '242024-12-31$252.42M$49.96M$1.54$12.78M
Q3 '242024-09-30$256.56M$48.58M$1.49$45.75M
Q2 '242024-06-30$256.51M$50.87M$1.55$40.07M
Q1 '242024-03-31$252.37M$51.59M$1.57$42.22M
Q4 '232023-12-31$310.29M$71.06M$2.15$65.58M
Q3 '232023-09-30$292.33M$65.93M$1.99$24.02M
Q2 '232023-06-30$273.97M$61.58M$1.86$32.72M
Q1 2026 • period ending 2026-03-31 • filed 2026-05-08
Valuation

Ratios derived from TTM financials and the current market price, sampled daily. History chart shows how expensive the stock is today relative to its own recent past.

Price Multiples
  • P/E — price / TTM earnings. Rough market rule: 10–15 value, 15–25 market, >30 growth/premium. Negative when earnings are negative.
  • P/B — price / book value. Useful for financials and asset-heavy names; meaningless for asset-light software.
  • P/S — price / TTM revenue. Useful when earnings are negative or noisy (early-stage growth).
  • EV/EBITDA — capital-structure-neutral. <10 cheap, 10–15 reasonable, >20 rich. Good for comparing across leverage profiles.
  • EV/Sales — like P/S but accounts for debt + cash. Compare within sector.
Profitability & Yields
  • ROE — return on equity. >15% strong, >25% exceptional. Caution: high leverage inflates ROE.
  • ROA — return on assets. Leverage-neutral; >5% solid, >10% exceptional.
  • Div Yield — annual dividend / price. Compare to 10Y Treasury; sustained yield >6% often signals distress.
  • FCF Yield — free cash flow / market cap. >5% is attractive; negative means burning cash.
Balance Sheet
  • Debt/Equity — leverage. <1 conservative, >2 aggressive. Sector-dependent (utilities naturally high, tech low).
  • Current Ratio — short-term liquidity. >1.5 comfortable, <1 raises short-term solvency flags.
Reading the history chart
  • Compare current level to the 3-year band: near the high end = relatively expensive; near the low = relatively cheap.
  • Multiples expanding while earnings are flat = sentiment-driven rally.
  • Multiples compressing while earnings grow = value coming from fundamentals.
P/E
36.32
P/B
3.51
P/S
4.34
EV/EBITDA
30.74
EV/Sales
4.21
ROE
9.7%
ROA
7.3%
Div Yield
0.00%
FCF Yield
2.63%
Debt/Equity
0.04
Current Ratio
—
Market Cap
$3.67B
as of 2026-10-21
Short Interest & Float

Regulatory short-interest reports publish on a bi-weekly settlement cadence; short-volume is reported daily by the trade-reporting facilities. Float is derived from insider-ownership filings.

Metric definitions
  • Short Interest — total shares currently sold short as of the settlement date. Lags real time by ~8 business days.
  • SI % of Float — short interest / free float. The key crowding metric.
  • Days to Cover — short interest / avg daily volume. How many full trading days it would take shorts to buy back. High DTC + catalyst = squeeze fuel.
  • Short Vol Ratio — today's short-sale volume / total volume. Intraday selling pressure proxy (not the same as short interest).
  • Free Float — shares available for public trading (total shares minus insider / restricted).
  • Float % — free float / shares outstanding. <50% = tightly held, more prone to squeezes.
How to read the signals
  • SI % of Float < 5% — typical, no particular signal.
  • 5–15% — elevated; watch for catalysts (earnings, guidance, macro).
  • 15–30% — heavily shorted; tight-float names in this range have produced notable squeezes historically.
  • >30% — extreme; borrow is likely expensive and squeeze risk is material.
  • Days to Cover > 5 combined with high SI% amplifies squeeze potential.
History chart
  • Trend matters more than level. Rapidly rising short interest often precedes negative catalysts or heavy hedging.
  • A sudden drop in SI after a rally may indicate a squeeze in progress.

Short interest is reported mid-month and end-of-month; short volume is daily.

Short Interest
1.44M
SI % of Float
4.72%
Days to Cover
3.80
Short Vol Ratio
82.8%
Free Float
30.49M
Float %
98.7%
Short interest 2026-09-30 • Short volume 2026-10-21 • Float 2026-08-24