FULC Fulcrum Therapeutics, Inc. Common Stock

XNAS 3.71 Delayed
Find condors

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.

FULC $3.71 —
Key stats
$3.71
52-Week Range
$2.83 – $15.74
YTD
-66.07%
IV Rank (30D)
0.0
Straddle Price
$0.85
P/C Vol Ratio
0.05
Market Cap
$0.3B
Open
$3.71
Day Range
$3.69 – $3.71
Volume
96,093
Prev Close
$3.70
Fair Value
+50.0% vs price

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 SPY1.38
Cost of Equity (CAPM)12.72% (VRP-adj)
WACC12.71%
Volatility Risk Premium+239.9pp (IV − HV30), ERP adj +50bps
Effective Tax Rate21.0%
Rev. Growth (YoY, DCF input)+3.0%
DCF Horizon5 years explicit + fade
Forward Tilt (NTM/TTM)×1.03 (applied to P/E, EV/EBITDA, P/S)
Free Cash Flow (TTM)$-0.1B
Return on Equity (TTM)-27.4%
Book / Price120.6% — banking bias active (P/B is primary)
Debt / Equity0.00
Quality Score1/6 — cyclical/struggling (5y DCF)
SMA 50$3.78 (Market Anchor value)
SMA 20 / Bollinger Mid$3.71
Bollinger Width / SMA20102.4% (drives anchor stability)
Net Debt$-0.0B
Market Cap$0B
Peers used for multiples: BNTC, UNH, UTHR (filtered from 8 ETF-co-members; sector bias active)
Blended Fair Value
$16.56
Deviation
+50.0%
MethodImplied PriceWeightDetail
DCF n/a 0%
DDM (Gordon) n/a 0%
Peer P/E n/a 0%
Peer EV/EBITDA n/a 0%
Peer P/B $16.56 100% median 3.7× · 3 peers
Peer P/S n/a 0%
Market Anchor (SMA50) $3.78 0% stability 0% (BB-width)
Options Expected (B-L 30d) n/a 0%
As of 2026-10-22 · updated
About
Industry (SIC)
PHARMACEUTICAL PREPARATIONS (2834) · industry map
Exchange
XNAS
Market Cap
$0.3B
Employees
55
List Date
2019-07-18
CIK
0001680581
Next Earnings
2026-11-04 (After-Close)
EPS Forecast
($0.10) (2 est.)
Headquarters
Cambridge, MA
Homepage
https://www.fulcrumtx.com

Fulcrum Therapeutics Inc is a clinical-stage biopharmaceutical company focused on developing small molecules for genetically defined rare diseases. Its product candidate, Pociredir, is an oral small molecule designed to induce fetal hemoglobin (HbF) and is in clinical development for sickle cell disease (SCD). The company completed dosing in the Phase 1b PIONEER trial evaluating pociredir in adults with SCD and reported clinical data showing clinically relevant HbF induction and improvements in markers of hemolysis and anemia. The company has also generated a pipeline of clinical-stage and pre…

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
Jan-10.95%-31.76%59.62%0.14%-18.18%-1.74%-0.48%
Feb14.85%-9.84%-52.14%27.31%-5.77%-21.83%-7.90%
Mar-9.87%112.30%-54.69%-14.10%-11.11%-1.79%3.46%
Apr-6.25%-59.48%-9.75%-23.42%39.49%-4.68%-10.68%
May-21.46%-27.35%0.00%7.09%56.96%-5.98%1.54%
Jun19.91%-29.19%14.19%-24.21%-1.15%-42.99%-10.57%
Jul-28.89%19.51%17.54%47.07%-1.61%-4.02%8.27%
Aug306.29%31.67%49.06%-5.11%-5.12%4.85%63.61%
Sep5.14%-1.22%-22.38%-55.93%43.53%-4.39%-5.88%
Oct-22.07%-31.86%-11.00%-12.22%-6.22%0.95%*-13.74%
Nov-34.12%18.10%28.00%19.94%21.29%--10.64%
Dec26.36%8.66%35.27%21.13%14.59%--21.20%
Total60.38%-62.99%-25.24%-46.61%159.04%-62.56%3.67%
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: $3.70
SMA 50: $3.78
SMA 200: $6.05
Current: $3.71
EMA 12: $3.70
EMA 26: $3.72
MACD: -0.0207 | Signal: 0.0040
BEARISH
ADX (14): 8.05
RANGE
+DI: 16.80
−DI: 14.99

Momentum Oscillators

RSI (14): 47.56
NEUTRAL
Stoch %K: 48.28
Stoch %D: 42.91
Williams %R: -51.72

Volume & Volatility

BB Upper: $3.76
BB Lower: $3.64
NEUTRAL
OBV: 11,505,167
Vol SMA 20: 1,376,481
Vol ROC: -96.46%
ATR: $0.06
True Range: $0.02
HV 20: 14.0%
HV 30: 12.7%
HV 60: 20.9%

Data Summary

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

Here is a structured report with the requested sections:

Executive Summary

Overall assessment: BEARISH (confidence level 7/10)

Key drivers and primary risks:

  • Recent negative news headlines surrounding Fulcrum Therapeutics, Inc.
  • Bearish MACD signal and histogram indicating potential sell signal
  • Moderate volatility compared to market beta (0.95 vs SPY) suggesting some independence

Investment thesis: Short-term bearish sentiment driven by recent negative news headlines may continue, but the stock's moderate volatility and historical trading range suggest potential for a bounce or correction.

Recent news sentiment impact:

  • Negative news headlines have led to short-term bearish sentiment, potentially driving prices lower in the near term

Technical Analysis

Trend Direction: Short-term (1-4 weeks) BEARISH, Medium-term (1-3 months) NEUTRAL, Long-term (3-12 months) NEUTRAL

Support/Resistance Levels:

  • Lower Bollinger Band: $1.95
  • Middle Band: $3.86
  • Upper Band: $5.77
  • SMA 20: $3.86
  • SMA 50: $5.83
  • SMA 200: $8.51

Momentum Signals:

  • RSI interpretation: Neutral (37.24)
  • MACD signal: Bearish (-0.63 / Signal: 0.13 / Histogram: -0.76)
  • Bollinger Bands position: Squeeze (price touching lower band)

Volume Analysis: Volume trends and institutional interest signals:

  • On-Balance Volume (OBV): 2536740.88
  • Volume Rate of Change: 97.33%
  • Institutional interest indicated by OBV and volume rate of change

News & Sentiment Analysis

Recent Headlines Summary: Key themes from last 10 news articles:

  • Recent negative headlines surrounding Fulcrum Therapeutics, Inc.
  • Positive earnings results and partnership announcements in the past
  • General market commentary and routine announcements

Sentiment Assessment: Aggregate news sentiment (positive/negative/neutral):

  • Negative sentiment dominates recent headlines

Catalyst Identification: Upcoming events, earnings, product launches, regulatory changes:

  • No imminent catalysts identified

Market Narrative: How news aligns with or contradicts technical signals:

  • Recent negative headlines contradict short-term bearish momentum signal from MACD

Risk & Volatility Assessment

Beta Interpretation: Risk relative to market (beta >1.2 = high risk, <0.8 = defensive):

  • Beta: 0.95 (moderate risk)

Volatility Regime: Current vs historical volatility levels:

  • Stock volatility: 1.00 (moderate)
  • Historical volatility: HV20 264.4%, HV30 218.9%, HV60 158.6%

Options Market Signals:

  • IV Rank: 48.9% (Medium - shows if volatility is historically high/low)
  • Current IV: 310.2%
  • Expected Move: $0.47 (21 DTE), 7-DTE: $0.47
  • Volume Flow: 71 calls vs 14 puts
  • Open Interest: 739 calls vs 4,569 puts
  • Put/Call Volume Ratio: 0.20 (Bullish sentiment)

Downside Protection: Support levels and risk management considerations:

  • Critical support level at $1.95
  • Risk management considerations include stop-loss levels and position sizing

Market Context & Positioning

Sector Performance: Relative strength vs sector/market:

  • Fulcrum Therapeutics, Inc. underperforming the market (SPY) in recent months

Institutional Activity: Volume patterns suggesting institutional interest:

  • OBV and volume rate of change indicate institutional interest

Correlation Analysis: How stock moves relative to market (R-squared interpretation):

  • R-squared: 0.12 (moderate correlation)

Relative Valuation: Position within trading range:

  • Fulcrum Therapeutics, Inc. is currently trading at the lower end of its historical range

Key Levels & Action Items

Critical Price Levels:

  • Support level at $1.95
  • Resistance levels at $3.86 and $5.77

Breakout/Breakdown Levels: Technical levels that could trigger significant moves:

  • Break above SMA 50 for potential medium-term uptrend
  • Break below SMA 20 for potential short-term downtrend

Time-Sensitive Catalysts: Earnings dates, FDA approvals, product launches:

  • No imminent catalysts identified

Risk Management: Stop-loss levels and position sizing considerations:

  • Critical support level at $1.95
  • Risk management considerations include stop-loss levels and position sizing
Generated
Showing 1–10 of 50
Page 1 of 5
Earnings History
17 of 19 under expected move
Avg Expected Move
24.17%
Avg Actual Move
7.81%
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
2021-08-10 After-Close 36.49% 7.62% 0.21x Within
2021-11-04 After-Close 14.42% 5.39% 0.37x Within
2022-03-03 After-Close 12.82% 11.37% 0.89x Within
2022-05-09 After-Close 11.10% 1.44% 0.13x Within
2022-11-08 After-Close 4.96% 7.75% 1.56x Exceeded
2023-01-04 After-Close 19.32% 10.39% 0.54x Within
2023-03-09 After-Close 15.15% 6.43% 0.42x Within
2023-05-15 After-Close 32.42% 4.40% 0.14x Within
2023-08-03 After-Close 36.36% 2.60% 0.07x Within
2024-02-27 After-Close 15.72% 1.38% 0.09x Within
2024-05-13 After-Close 12.93% 7.62% 0.59x Within
2024-07-31 After-Close 16.16% 2.91% 0.18x Within
2024-11-13 After-Close 14.04% 6.74% 0.48x Within
2025-02-25 After-Close 45.95% 10.27% 0.22x Within
2025-05-01 After-Close 22.26% 28.31% 1.27x Exceeded
2025-07-29 Pre-Market 55.38% 2.82% 0.05x Within
2025-10-29 After-Close 34.99% 8.12% 0.23x Within
2026-02-24 Pre-Market 34.44% 21.21% 0.62x Within
2026-04-27 Pre-Market 24.23% 1.53% 0.06x Within

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

FULC Options Activity & IV Rank

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

Volatility Metrics

Current IV: 41.9%
7-DTE IV: —
Expected Move: $0.85
7-DTE Move: $0.85
Days to Exp: 29 (2026-11-20)

Options Flow

Call Volume: 20
Put Volume: 1
P/C Volume: 0.05
BULLISH
Call OI: 20
Put OI: 1
P/C OI: 0.05
Total OI: 21

ATM Options Pricing

ATM Call: $0.38
ATM Put: $0.47
Call %: 10.1%
Put %: 12.8%

Chain Summary

Chain Volume: 1,651
Chain OI: 18,178
Last Updated: 10/22/2026
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
HIGH γ vs HISTORY

Estimated net dealer gamma is at the 87th percentile of this name's own daily history, near the high end of its range. This describes current positioning; it is not a forecast or a trading signal.

Gamma percentile
87%
vs own history
GEX tilt
+0.94
OI-weighted, today
Vanna tilt
+0.93
δ-sensitivity to IV
Charm tilt
-0.94
δ-decay vs time
Vanna tilt +0.93: the estimated dealer exposure leans positive, so the modeled hedge would shift noticeably if implied volatility changed.
Charm tilt -0.94: 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.

· 4 ATM contracts, 5k 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
No data
30 DTE / 10d —
— pts EXTREME
ATM 89.3% / Wing —

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)0.0LowOct 22
Straddle Price (30 DTE)$0.85Oct 22
Beta Analysis

Risk Metrics

Beta: 0.5651
Alpha: -48.73%
Correlation: 0.0768
R-Squared: 0.6%
Stock Volatility: 93.6%
Market Volatility: 12.7%

Analysis Details

Benchmark: SPY
Data Points: 251
Period: 252 trading days
Interpretation:
Low volatility - stock moves less than market
Beta & Alpha Over Time
Notable investors who own FULC
5 of 37 tracked investors
InvestorValueShare of their portfolioRankQ/Q sharesSource
Citadel Hedge fund
Ken Griffin
$9.9M
0.01%
#1597 of 6285+109.2%13F
Renaissance Technologies Hedge fund
Jim Simons
$6.0M
0.01%
#1347 of 3138+12016.2%13F
Millennium Management Hedge fund
Izzy Englander
$5.4M
0.00%
#2004 of 3716+316.8%13F
Point72 Hedge fund
Steve Cohen
$2.4M
0.00%
#1214 of 1945-68.6%13F
Rockefeller Capital Management Family office
Rockefeller family
$2K
0.00%
#4437 of 4729-52.7%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

FULC Institutional Ownership (13F)

Latest filings — 2026-09-30
Diluted shares outstanding: 69,607,750 (as of 2026-06-30)

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.

156 filers82,456,515 shares$329.48M value118.46% of float
# Filer Shares Value % of Total % of Float Period
1 Vanguard Group Inc Custodian 3,559,552 $40.26M 12.22% 5.11% 2025-12-31
2 BlackRock, Inc. Custodian 8,824,259 $32.30M 9.80% 12.68% 2026-06-30
3 EcoR1 Capital, LLC 6,549,866 $23.97M 7.28% 9.41% 2026-06-30
4 TANG CAPITAL MANAGEMENT LLC 6,521,412 $23.87M 7.24% 9.37% 2026-06-30
5 Nantahala Capital Management, LLC 5,475,040 $20.04M 6.08% 7.87% 2026-06-30
6 MONTANOVA CAPITAL, LLC 3,680,921 $13.47M 4.09% 5.29% 2026-06-30
7 D. E. Shaw & Co., Inc. Custodian 3,044,385 $11.14M 3.38% 4.37% 2026-06-30
8 Citadel Advisors LLC Custodian 2,704,505 $9.90M 3.00% 3.89% 2026-06-30
9 Vanguard Capital Management LLC 2,697,216 $9.87M 3.00% 3.87% 2026-06-30
10 Jane Street Group, LLC Custodian 2,217,498 $8.12M 2.46% 3.19% 2026-06-30
11 State Street Corp 2,037,025 $7.46M 2.26% 2.93% 2026-06-30
12 ADAGE CAPITAL PARTNERS GP, L.L.C. 2,000,000 $7.32M 2.22% 2.87% 2026-06-30
13 GSK plc 1,785,714 $6.54M 1.98% 2.57% 2026-06-30
14 Qube Research & Technologies Ltd 1,748,467 $6.40M 1.94% 2.51% 2026-06-30
15 RENAISSANCE TECHNOLOGIES LLC 1,647,800 $6.03M 1.83% 2.37% 2026-06-30
16 ADAR1 Capital Management, LLC 1,565,029 $5.73M 1.74% 2.25% 2026-06-30
17 Millennium Management LLC Custodian 1,485,803 $5.44M 1.65% 2.13% 2026-06-30
18 Geode Capital Management, LLC Custodian 1,432,133 $5.24M 1.59% 2.06% 2026-06-30
19 Marshall Wace, LLP Custodian 1,358,423 $4.97M 1.51% 1.95% 2026-06-30
20 UBS Group AG Custodian 1,253,909 $4.59M 1.39% 1.80% 2026-06-30
21 Susquehanna International Group, LLP Custodian 1,180,946 $4.32M 1.31% 1.70% 2026-06-30
22 AQR Capital Management, LLC Custodian 1,103,261 $4.04M 1.23% 1.58% 2026-06-30
23 Goldman Sachs Group Inc Custodian 1,094,425 $4.01M 1.22% 1.57% 2026-06-30
24 Ikarian Capital, LLC 1,049,161 $3.84M 1.17% 1.51% 2026-06-30
25 Bank of America Corp Custodian 1,043,029 $3.82M 1.16% 1.50% 2026-06-30
8 filers$3.40M notional
# Filer Notional Value % of Total Period
1 SILVERARC CAPITAL MANAGEMENT, LLC $1.43M 42.18% 2026-06-30
2 Simplex Trading, LLC Custodian $900.36K 26.48% 2026-06-30
3 GROUP ONE TRADING LLC Custodian $443.96K 13.06% 2026-06-30
4 Susquehanna International Group, LLP Custodian $263.52K 7.75% 2026-06-30
5 Jane Street Group, LLC Custodian $161.77K 4.76% 2026-06-30
6 Citadel Advisors LLC Custodian $124.44K 3.66% 2026-06-30
7 IMC-Chicago, LLC Custodian $53.80K 1.58% 2026-06-30
8 LMR Partners LLP $18.30K 0.54% 2026-06-30
6 filers$2.08M notional
# Filer Notional Value % of Total Period
1 Citadel Advisors LLC Custodian $743.71K 35.81% 2026-06-30
2 Susquehanna International Group, LLP Custodian $641.96K 30.91% 2026-06-30
3 Simplex Trading, LLC Custodian $336.35K 16.20% 2026-06-30
4 GROUP ONE TRADING LLC Custodian $153.72K 7.40% 2026-06-30
5 IMC-Chicago, LLC Custodian $113.09K 5.45% 2026-06-30
6 Jane Street Group, LLC Custodian $87.84K 4.23% 2026-06-30

FULC Insider Trading (Form 4)

Latest: 2026-07-20
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
2026-07-20 TANG CAPITAL MANAGEMENT LLC 10%+ Owner Buy (P) +335,232 $3.55 $1.19M EDGAR
2026-07-15 TANG CAPITAL MANAGEMENT LLC 10%+ Owner Buy (P) +499,892 $3.57 $1.78M EDGAR
2026-07-02 Kate Haviland Director Grant (A) +32,000 opt — EDGAR
2026-07-02 James A Geraghty Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Colin Hill Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Alan Ezekowitz Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Robert J Gould Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Rachel K. King Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Katina Dorton Director Grant (A) +32,000 opt — EDGAR
2026-07-02 Sonja Banks Director Grant (A) +32,000 opt — EDGAR
2026-05-01 Joshua Lehrer-Graiwer Director Grant (A) +64,000 opt — EDGAR
2026-02-04 Robert J Gould Director Sell (S) −15,000 $10.72 -$160.9K EDGAR
2026-02-04 Curtis Gale Oltmans Chief Legal Officer Grant (A) +170,000 opt — EDGAR
2026-02-04 Alex Sapir See Remarks Grant (A) +650,000 opt — EDGAR
2026-02-04 Greg Tourangeau Principal Accounting Officer Grant (A) +57,000 opt — 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.

FULC Insider Holdings

7 insiders · @ $3.71
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 Rajeev M. Shah 10%+ Owner 8,852,079 $32.84M -$233.41M 2 2025-12-10
2 TANG CAPITAL MANAGEMENT LLC 10%+ Owner 7,030,000 $26.08M $2.97M 2 2026-07-20
3 Robert J Gould Director 469,864 $1.74M -$5.10M 29 2026-07-02
4 Alex Sapir See Remarks 193,360 $717.4K $492.0K 4 2026-02-04
5 James A Geraghty Director 90,714 $336.5K $91.6K 9 2026-07-02
6 Greg Tourangeau Principal Accounting Officer 14,062 $52.2K -$62.3K 10 2026-02-04
7 Curtis Gale Oltmans Chief Legal Officer 10,252 $38.0K -$34.8K 10 2026-02-04
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.

FULC Board & Officers

As of SEC filings through Jul 20, 2026

Directors 10

Officers 2

10% owners 6

Changes in the last 10 years (92)
Jul 13, 2026Tang Capital Management LLC became a 10% owner
Jul 13, 2026Kevin Tang became a 10% owner
Jun 10, 2026The company announced the departure of Greg Tourangeau as Principal Accounting Officer in an SEC filing
Apr 23, 2026The company announced the departure of Alan A Musso as Chief Financial Officer in an SEC filing
Apr 23, 2026Joshua Lehrer-Graiwer became a director
Nov 12, 2024The company announced the departure of James J. Collins from the board in an SEC filing
Nov 12, 2024Rachel K. King became a director
Sep 23, 2024Rajeev M. Shah first listed as a 10% owner in an SEC filing
Sep 23, 2024Ra Capital Management, L.p. first listed as a 10% owner in an SEC filing
Sep 23, 2024RA Capital Healthcare Fund LP first listed as a 10% owner in an SEC filing
Sep 23, 2024Peter Kolchinsky first listed as a 10% owner in an SEC filing
Aug 23, 2024Rajeev M. Shah reported in an SEC filing no longer being a 10% owner
Aug 23, 2024Ra Capital Management, L.p. reported in an SEC filing no longer being a 10% owner
Aug 23, 2024RA Capital Healthcare Fund LP reported in an SEC filing no longer being a 10% owner
Aug 23, 2024Peter Kolchinsky reported in an SEC filing no longer being a 10% owner
Jun 18, 2024Robert J Gould no longer listed as Interim President & CEO in SEC filings
Jun 17, 2024Colin Hill became a director
May 9, 2024Greg Tourangeau listed as Principal Accounting Officer (previously Vice President, Finance) in SEC filings
Mar 18, 2024Patrick Taylor Horn became Chief Medical Officer
Jan 30, 2024Greg Tourangeau listed as Vice President, Finance (previously Controller) in SEC filings
Not reported recently (13)
  • Patrick Taylor Horn · Last reported as Chief Medical Officer in an SEC filing dated Mar 20, 2024
  • Melvin H. Hayes III · Last reported as Chief Operating Officer in an SEC filing dated Apr 28, 2023
  • Santiago Arroyo · Last reported as Chief Medical Officer in an SEC filing dated Nov 9, 2022
  • Bryan Stuart · Last reported as a director in an SEC filing dated Jan 21, 2022
  • Peter G. Thomson · Last reported as VP Finance & Accounting in an SEC filing dated Jan 21, 2022
  • Mark J Levin · Last reported as a 10% owner in an SEC filing dated Nov 12, 2021
  • Kevin P Starr · Last reported as a 10% owner in an SEC filing dated Nov 12, 2021
  • Christopher Moxham · Last reported as Chief Scientific Officer in an SEC filing dated Aug 12, 2021
  • Owen B. Wallace · Last reported as Chief Scientific Officer in an SEC filing dated Sep 14, 2020
  • Diego Cadavid · Last reported as SVP Clinical Development in an SEC filing dated Jul 2, 2020
  • Trv Gp IV, LLC · Last reported as a 10% owner in an SEC filing dated Jul 22, 2019
  • Third Rock Ventures GP IV, L.P. · Last reported as a 10% owner in an SEC filing dated Jul 22, 2019
  • Third Rock Ventures IV, L.P. · Last reported as a 10% owner in an SEC filing dated Jul 22, 2019
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.

FULC Proposed Insider Sales (Form 144)

Latest: 2026-06-26
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
2026-06-26 ALAN EZEKOWITZ Director 18,000 $65.0K 2026-06-26 Morgan Stanley Smith Barney LLC … 10b5-1 EDGAR
2025-12-15 CURTIS G OLTMANS Officer 3,452 $44.9K 2025-12-15 Morgan Stanley Smith Barney LLC … 10b5-1 EDGAR
2025-12-08 RA Capital Healthcare Fund LP 10% Stockholder 4,175,139 $54.24M 2025-12-08 BTIG, LLC — EDGAR
2025-11-19 ROBERT J GOULD Director 45,000 $437.9K 2025-11-19 Morgan Stanley Smith Barney LLC … 10b5-1 EDGAR
2024-03-08 Greg Tourangeau Officer 4,884 $57.2K 2024-03-08 Merrill Lynch, Pierce, Fenner & … — 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
36 ETFs hold FULC
25 shown · $31.95M total exposure · 0.01% AUM-weighted avg weight
# ETF Provider Weight $ Exposure ETF AUM As Of
1 VTI Vanguard Morningstar Total Stock Market ETF Vanguard 0.00% $7.7M — 2026-09-30
2 IWM iShares Russell 2000 ETF iShares (BlackRock) 0.01% $6.4M $75.1B 2026-10-20
3 VXF Vanguard Extended Market ETF Vanguard 0.00% $2.7M — 2026-09-30
4 IWN iShares Russell 2000 Value ETF iShares (BlackRock) 0.02% $2.3M $13.7B 2026-10-20
5 IBB iShares Biotechnology ETF iShares (BlackRock) 0.02% $2.1M $11.0B 2026-10-20
6 FESM Fidelity Enhanced Small Cap Core ETF Fidelity 0.03% $1.9M $6.6B 2026-10-20
7 SCHA Schwab U.S. Small-Cap ETF Nport 0.01% $1.6M — 2026-05-31
8 VTWO Vanguard Russell 2000 ETF Vanguard 0.01% $1.5M — 2026-09-30
9 DFAS Dimensional US Small Cap ETF Dimensional 0.00% $786,341 — 2026-10-20
10 IWC iShares Micro-Cap ETF iShares (BlackRock) 0.06% $763,430 $1.2B 2026-10-20
11 DFMC Dimensional US Micro Cap ETF Dimensional 0.01% $655,590 — 2026-10-20
12 PINK Simplify Health Care ETF Nport 0.16% $562,886 — 2026-06-30
13 VHT Vanguard Health Care ETF Vanguard 0.00% $526,403 — 2026-09-30
14 AVSC Avantis U.S. Small Cap Equity ETF Avantis 0.02% $525,536 $3.1B 2026-10-20
15 DFAC Dimensional US Core Equity 2 ETF Dimensional 0.00% $504,510 — 2026-10-20
16 ITOT iShares Core S&P Total U.S. Stock Market ETF iShares (BlackRock) 0.00% $411,871 $97.4B 2026-10-20
17 PRFZ Invesco RAFI US 1500 Small-Mid ETF Nport 0.01% $293,592 — 2026-07-31
18 VTWV Vanguard Russell 2000 Value ETF Vanguard 0.02% $232,268 — 2026-09-30
19 SCHB Schwab U.S. Broad Market ETF Nport 0.00% $210,209 — 2026-05-31
20 RSSL Global X Russell 2000 ETF Global X 0.01% $121,068 — 2026-10-21
21 IWV iShares Russell 3000 ETF iShares (BlackRock) 0.00% $87,580 $20.6B 2026-10-20
22 OMFS Invesco Russell 2000 Dynamic Multifactor ETF Nport 0.02% $50,703 — 2026-05-31
23 AVUS Avantis U.S. Equity ETF Avantis 0.00% $40,909 $14.8B 2026-10-20
24 DFUS Dimensional US Equity Market ETF Dimensional 0.00% $37,379 $21.4B 2026-10-20
25 IBBQ Invesco Nasdaq Biotechnology ETF Nport 0.04% $24,227 — 2026-05-31
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
$-1.21
TTM Revenue
—
TTM Net Income
$-85.00M
TTM Op. Cash Flow
$-65.78M
Quarterly figures (12 quarters)
QuarterPeriod EndRevenueNet IncomeDiluted EPSOp. Cash Flow
Q2 '262026-06-30—$-26.18M$-0.34$-16.04M
Q1 '262026-03-31—$-18.89M$-0.25$-18.75M
Q4 '252025-12-31—$-20.33M$-0.31$-16.80M
Q3 '252025-09-30—$-19.59M$-0.31$-14.19M
Q2 '252025-06-30—$-17.30M$-0.28$-13.82M
Q1 '252025-03-31—$-17.66M$-0.28$-15.26M
Q4 '242024-12-31$0.00$-16.57M$-0.27$-16.76M
Q3 '242024-09-30—$-21.70M$-0.35$-19.07M
Q2 '242024-06-30$80.00M$55.41M$0.87$58.90M
Q1 '242024-03-31—$-26.87M$-0.43$-25.28M
Q4 '232023-12-31$871.00K$-24.76M$-0.40$-23.16M
Q3 '232023-09-30$759.00K$-24.02M$-0.39$-22.91M
Q2 2026 • period ending 2026-06-30 • filed 2026-07-30
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
—
P/B
0.83
P/S
—
EV/EBITDA
—
EV/Sales
—
ROE
-27.4%
ROA
-26.2%
Div Yield
0.00%
FCF Yield
-25.44%
Debt/Equity
0.00
Current Ratio
—
Market Cap
$258.59M
as of 2026-10-22
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
7.11M
SI % of Float
11.14%
Days to Cover
4.48
Short Vol Ratio
62.9%
Free Float
63.83M
Float %
83.7%
Short interest 2026-09-30 • Short volume 2026-10-21 • Float 2026-08-19