Karellis increased his direct holdings by 26%, signaling confidence in the shipping company as its stock surges 61% over the past year.
SBLK Star Bulk Carriers Corp.
XNAS 29.08 DelayedStock 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.
SBLK
$29.08
—
Key stats
$29.08
- 52-Week Range
- $17.59 – $32.88
- YTD
- +50.13%
- IV Rank (30D)
- 100.0
- Straddle Price
- $2.58
- P/C Vol Ratio
- 6.89
- Market Cap
- $3.4B
- Open
- $29.15
- Day Range
- $28.98 – $29.50
- Volume
- 922,083
- Prev Close
- $28.98
Fair Value
MODEL: NEUTRAL
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) | 4.96% |
| Beta vs SPY | 0.78 |
| Cost of Equity (CAPM) | 8.86% (VRP-adj) |
| WACC | 5.23% |
| Volatility Risk Premium | +47.2pp (IV − HV30) |
| Effective Tax Rate | 21.0% |
| Rev. Growth (YoY, DCF input) | +3.0% |
| DCF Horizon | 5 years explicit + fade |
| Forward Tilt (NTM/TTM) | ×1.03 (applied to P/E, EV/EBITDA, P/S) |
| Free Cash Flow (TTM) | $0.0B |
| Debt / Equity | 0.34 |
| Quality Score | 1/6 — cyclical/struggling (5y DCF) |
| SMA 50 | $30.21 (Market Anchor value) |
| SMA 20 / Bollinger Mid | $29.31 |
| Bollinger Width / SMA20 | 42.1% (drives anchor stability) |
| Net Debt | $0.4B |
Peers used for multiples: EXPD, FDX, FRO, INSW, MATX, ODFL, UPS, XPO
60-Day Conviction
4%
20-Day Fair Value
≈ by Nov 25, 2026
$29.19
α +0.4%
rank 55%
conviction
23%
40-Day Fair Value
≈ by Dec 24, 2026
$29.28
α +0.7%
rank 55%
conviction
22%
60-Day Fair Value
≈ by Jan 22, 2027
$29.05
α -0.1%
rank 55%
conviction
4%
| Method | Implied Price | Weight | Detail |
|---|---|---|---|
| DCF | n/a | 0% | |
| DDM (Gordon) | $33.04 | 0% | |
| Peer P/E | n/a | 0% | median 18.8× · 7 peers |
| Peer EV/EBITDA | n/a | 0% | median 10.6× · 7 peers |
| Peer P/B | n/a | 0% | median 5.7× · 7 peers |
| Peer P/S | n/a | 0% | median 2.1× · 7 peers |
| Market Anchor (SMA50) | $30.21 | 0% | stability 0% (BB-width) |
| Options Expected (B-L 30d) | $29.89 | 100% | 15 strikes · skew +0.53 |
As of 2026-10-27 · updated
Related
About
- Industry (SIC)
- DEEP SEA FOREIGN TRANSPORTATION OF FREIGHT (4412) · industry map
- Exchange
- XNAS
- Market Cap
- $3.4B
- Employees
- 294
- List Date
- 2007-12-03
- CIK
- 0001386716
- Next Earnings
- 2026-11-17
- EPS Forecast
- $1.27 (1 est.)
- Homepage
- https://www.starbulk.com
Star Bulk Carriers Corp provides seaborne transportation solutions in the dry bulk sector. The company owns and operates dry bulk carrier vessels, which are used to transport bulk, such as iron ore, coal, grains, bauxite, fertilizers, and steel products. It owns a fleet of vessels that consists of Newcastlemax, Capesize, Post Panamax, Kamsarmax, Panamax, Ultramax, and Supramax. The firm generates the majority of its revenue from Time charters and Voyage charters.
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 | '26 | Avg |
|---|---|---|---|---|---|---|---|
| Jan | 19.82% | -5.84% | 23.08% | 3.97% | -0.84% | 18.48% | 9.78% |
| Feb | 33.08% | 26.02% | 8.64% | 11.44% | 3.03% | 13.76% | 15.99% |
| Mar | 6.69% | 9.32% | -12.15% | -1.85% | 2.17% | -14.58% | -1.73% |
| Apr | 28.57% | -7.44% | 2.03% | 3.18% | -6.23% | 6.26% | 4.39% |
| May | -7.14% | 13.14% | -16.03% | 10.31% | 11.55% | 7.79% | 3.27% |
| Jun | 14.81% | -24.95% | -0.28% | -9.20% | 5.57% | -11.49% | -4.26% |
| Jul | -10.87% | 11.22% | 2.84% | -9.77% | 5.06% | 15.35% | 2.31% |
| Aug | 20.22% | -27.59% | -1.35% | -1.70% | 1.25% | 7.45% | -0.29% |
| Sep | 3.75% | -11.49% | 9.42% | 15.22% | -0.27% | -5.44% | 1.86% |
| Oct | -18.12% | -2.90% | -2.76% | -18.99% | 0.53% | -4.44%* | -7.78% |
| Nov | 1.74% | 7.42% | 15.48% | -9.03% | 8.98% | -- | 4.92% |
| Dec | 14.55% | 3.33% | -2.92% | -12.27% | -3.95% | -- | -0.25% |
| Total | 147.38% | -21.68% | 21.45% | -22.35% | 28.68% | 30.72% | 30.70% |
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: $29.31
SMA 50: $30.21
SMA 200: $26.36
Current: $29.08
EMA 12: $28.93
EMA 26: $29.37
MACD: -0.4337 | Signal: -0.0089
BEARISH
ADX (14): 13.10
RANGE
+DI: 21.55
−DI: 20.61
Momentum Oscillators
RSI (14): 47.18
NEUTRAL
Stoch %K: 39.94
Stoch %D: 33.06
Williams %R: -51.25
Volume & Volatility
BB Upper: $31.12
BB Lower: $27.50
NEUTRAL
OBV: 27,341,038
Vol SMA 20: 1,497,761
Vol ROC: -40.58%
ATR: $0.85
True Range: $0.52
HV 20: 30.1%
HV 30: 29.9%
HV 60: 30.7%
Data Summary
Data Points: 500
Last Updated:
Date Range: 2024-10-28T00:00:00 – 2026-10-26T00:00:00
AI Analysis
SBLK (Star Bulk Carriers Corp.) - Comprehensive Stock Analysis
Executive Summary
Overall Assessment: NEUTRAL | Confidence Level: 6/10
Star Bulk Carriers presents a mixed technical and sentiment picture with conflicting signals that warrant cautious observation rather than conviction trading. The stock is trading 1.2% below its 20-day moving average in a range-bound technical environment (ADX 13.32), while positive insider activity and neutral-to-positive recent news provide modest upside support. However, weak momentum (MACD -0.12 below signal line), declining volume (-25.13% rate of change), and a bearish technical histogram suggest consolidation rather than directional conviction.
Primary Drivers: Positive insider accumulation (director purchase 10/07), stable shipping sector positioning, and moderate positive sentiment from recent news coverage.
Primary Risks: Bearish MACD divergence, volume deterioration, neutral ADX (suggesting choppy range-bound trading), and earnings uncertainty ahead of 11/17 report.
Investment Thesis: SBLK appears to be consolidating within a tight range after recent volatility. Insider buying signals confidence, but technical momentum has not yet confirmed upside breakout. The stock's low beta (0.69) suggests defensive positioning, making it suitable for risk-averse exposure to shipping sector cycles.
Recent News Sentiment Impact: Mixed sentiment with positive undertones (insider buying, potential cargo boom continuation) offset by neutral market-wide commentary and ATM offering announcement. News does not align with recent downward price action, suggesting potential disconnect between micro-level sentiment (director confidence) and macro execution.
Technical Analysis
Trend Direction
| Timeframe | Direction | Rationale | |-----------|-----------|-----------| | Short-term (1-4 weeks) | NEUTRAL/WEAK DOWNTREND | Price at $29.84 below SMA 20 ($30.41); MACD below signal line; ADX 13.32 indicates range-bound regime, not trending | | Medium-term (1-3 months) | NEUTRAL UPTREND | Price firmly above SMA 50 ($30.17 proximity) and well above SMA 200 ($25.92); +4.65% above 200-day MA suggests longer-term support intact | | Long-term (3-12 months) | UPTREND | Price $29.84 vs SMA 200 $25.92 = 15.1% premium; sustained above long-term moving average indicates structural bullish positioning |
Support & Resistance Levels
| Level | Type | Distance | Relevance | |-------|------|----------|-----------| | $28.64 | SUPPORT | -4.0% | Bollinger Band lower envelope; immediate downside cushion | | $29.84 | CURRENT PRICE | — | Trading in neutral zone of daily range | | $30.17 | DYNAMIC SUPPORT | +1.1% | SMA 50; psychological level defending uptrend | | $30.41 | NEAR RESISTANCE | +1.9% | SMA 20; recent short-term resistance | | $32.19 | STRONG RESISTANCE | +7.8% | Bollinger Band upper envelope; technical ceiling for near-term breakout | | $25.92 | MAJOR SUPPORT | -13.1% | SMA 200; long-term breakout level |
Key Observation: Bollinger Bands width of 11.66 indicates moderate volatility with room to mean-revert. Current position near the middle band ($30.41) suggests neither overbought nor oversold conditions, reinforcing neutral regime.
Momentum Signals
RSI (14): 46.99 — NEUTRAL
- Well-centered in 30-70 neutral zone; no overbought (>70) or oversold (<30) extremes
- Suggests equilibrium between buyers and sellers with no urgent exhaustion signals
- Does not confirm momentum in either direction; consistent with range-bound consolidation
MACD: -0.12 / Signal: -0.09 / Histogram: -0.03 — BEARISH DIVERGENCE
- MACD below signal line (-0.12 < -0.09) = bearish crossover signal
- Negative histogram (-0.03) indicates weakening momentum, not strengthening
- Critical Issue: While not deeply negative, the bearish configuration conflicts with price holding above medium-term moving averages
- This divergence suggests caution on upside follow-through; any rally would need histogram to turn positive to confirm bullish reversal
Stochastic Oscillators: %K 36.93 / %D 31.97 — MILD BEARISH BIAS
- Both below 50 midpoint, suggesting weakness relative to recent trading range
- %K above %D but both in lower half (30-50 zone) = mild bearish momentum, not oversold buy signal
- Williams %R at -60.00 = moderately elevated; typically -80 to -100 is oversold, so -60 shows some room to decline before capitulation
Summary: Momentum indicators collectively suggest consolidation with mild bearish undertones. No oversold condition to signal imminent bounce, but no overbought condition to warn of correction either.
Bollinger Bands Analysis
- Upper Band: $32.19 | Middle: $30.41 | Lower: $28.64
- Position: Price $29.84 = 45% of the way from lower to upper band (neutral mean-reversion zone)
- Width: 11.66 = Moderate volatility; not in squeeze (which would signal breakout imminent) or explosive expansion (which would signal climactic move)
- Interpretation: Bands suggest balanced technical environment. Price has room to move to either $28.64 (support test) or $32.19 (resistance test) before extremes. Current neutral positioning supports range-bound trading.
News & Sentiment Analysis
Recent Headlines Summary (Last 10 Articles, Dates 10/07-10/09)
| Date | Headline | Sentiment | Key Takeaway | |------|----------|-----------|--------------| | 10/09 | Stock Falls Amid Market Uptick | NEUTRAL | Negative relative performance vs market; stock underperforming | | 10/09 | ATM Equity Offering Renewal | NEUTRAL | Financing flexibility; potential dilution concern | | 10/08 | Stock Gains As Market Dips | POSITIVE | Positive relative performance; defensive positioning working | | 10/07 | Director Erhardt Koert Purchases 6,000 Shares | POSITIVE | Insider confidence signal; management alignment with shareholders | | 10/07 | ZIM Bullish 2026 Outlook | POSITIVE | Sector bullish sentiment extending to peer companies | | 10/07 | ECO vs SBLK Comparison | NEUTRAL | Competitive positioning analysis; no directional signal |
Sentiment Assessment
Aggregate Sentiment: SLIGHTLY POSITIVE (Neutral-Leaning)
- Positive signals (33%): Director insider buying (bullish signal—skin in the game), sector tailwinds (peer ZIM outlook), relative defensive strength (10/08 gains vs market dips)
- Neutral signals (67%): Market-level commentary, ATM offering (financial flexibility but potential dilution), competitive comparisons
- Negative signals (0%): No earnings misses, regulatory issues, or downgrades in recent coverage
Sentiment-Price Disconnect: Price fell on 10/09 despite market uptick (underperformance), yet recent news has been neutral-to-positive. This suggests recent price weakness may be technical consolidation rather than sentiment-driven selling.
Catalyst Identification
| Catalyst | Timing | Impact | Status | |----------|--------|--------|--------| | Q3 2026 Earnings | 2026-11-17 (39 days) | High—Shipping earnings sensitive to freight rates, vessel utilization, margins | UPCOMING | | Director Insider Buying | 2026-10-07 (2 days ago) | Medium—Signal of management confidence; potential support for price | RECENT | | ATM Offering Program | 2026-10-09 (1 day ago) | Medium—Financial flexibility; potential overhang if dilutive | RECENT | | Shipping Sector Cycle | Ongoing | High—Freight rates, IMO 2030 regulations, fleet utilization drive earnings | MACRO DRIVER |
**Near-Term Catalyst (Most Important)
Generated
News
All SBLK news →
Star Bulk Carriers Director Erhardt Koert Purchases 6,000 Shares. Is the Cargo Boom Set to Continue?
Koert's $169,620 acquisition increases his direct holdings by 60%, signaling confidence in the shipping company after a strong 61% stock return over the past year.
SBLK Options Activity & IV Rank
SBLK IV rank history, 52-week IV rank and IV percentile →
Volatility Metrics
Current IV: 40.7%
7-DTE IV: —
Expected Move: $2.58
7-DTE Move: $2.58
Days to Exp: 25 (2026-11-20)
Options Flow
Call Volume: 223
Put Volume: 1,537
P/C Volume: 6.892
BEARISH
Call OI: 17,280
Put OI: 15,175
P/C OI: 0.878
Total OI: 32,455
ATM Options Pricing
ATM Call: $1.32
ATM Put: $1.25
Call %: 4.6%
Put %: 4.3%
Chain Summary
Chain Volume: 5,896
Chain OI: 69,162
Last Updated: 10/26/2026
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
LOW γ vs HISTORY
Estimated net dealer gamma is at the 18th percentile of this name's own daily history, near the low end of its range. This describes current positioning; it is not a forecast or a trading signal.
Gamma percentile
18%
vs own history
GEX tilt
-0.11
OI-weighted, today
Vanna tilt
+0.32
δ-sensitivity to IV
Charm tilt
-0.30
δ-decay vs time
Vanna tilt +0.32: the estimated dealer exposure leans positive, so the modeled hedge would shift noticeably if implied volatility changed.
Charm tilt -0.30: the estimated dealer exposure leans negative, so the modeled hedge would shift noticeably as time passes and options approach expiry.
? What is this?
· 50 ATM contracts, 23k total OI
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.
Skew (Wing IV − ATM IV)
DTE:
Wing Δ:
Wing vs ATM
IV(put wing) − IV(ATM), in vol pointsHow 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 sideWhich 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 26 · No data
30 DTE / 10d
14%
+3.8
pts
EXTREME
as of Oct 26 · ATM 42.5% / Wing 46.3%
Extreme reading.
Historically these have been contrarian — on the small set of observed earnings-day cases, large negative wing-vs-ATM gaps (calls pricing much richer than puts at the same delta) preceded sharp drops in the underlying within 1-12 days. Not financial advice and the dataset is small.
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)100.0HighOct 26
Straddle Price (30 DTE)$2.58Oct 26
Beta Analysis
Risk Metrics
Beta: 0.7030
Alpha: 47.07%
Correlation: 0.2748
R-Squared: 7.6%
Stock Volatility: 32.6%
Market Volatility: 12.7%
Analysis Details
Benchmark: SPY
Data Points: 251
Period: 252 trading days
Data Points: 251
Period: 252 trading days
Interpretation:
Low volatility - stock moves less than market
Low volatility - stock moves less than market
Beta & Alpha Over Time
Notable investors who own SBLK
6 of 37 tracked investors
| Investor | Value | Share of their portfolio | Rank | Q/Q shares | Source |
|---|---|---|---|---|---|
| Renaissance Technologies Hedge fund Jim Simons | $52.4M | #319 of 3138 | +1.5% | 13F | |
| Bridgewater Associates Hedge fund Ray Dalio | $17.9M | #225 of 997 | +30.2% | 13F | |
| Citadel Hedge fund Ken Griffin | $14.8M | #1318 of 6285 | +44.5% | 13F | |
| Millennium Management Hedge fund Izzy Englander | $11.8M | #1466 of 3716 | -34.3% | 13F | |
| Point72 Hedge fund Steve Cohen | $10.9M | #735 of 1945 | -44.6% | 13F | |
| Rockefeller Capital Management Family office Rockefeller family | $7K | #4120 of 4729 | 0.0% | 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
SBLK Institutional Ownership (13F)
Latest filings — 2026-09-30
? 13F Guide
Diluted shares outstanding: 115,420,379 (as of 2025-12-31)
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.
12 filers$23.41M notional
| # | Filer | Notional Value | % of Total | Period |
|---|---|---|---|---|
| 1 | Jane Street Group, LLC Custodian | $7.93M | 33.87% | 2026-06-30 |
| 2 | Susquehanna International Group, LLP Custodian | $4.54M | 19.38% | 2026-06-30 |
| 3 | GROUP ONE TRADING LLC Custodian | $2.63M | 11.22% | 2026-06-30 |
| 4 | PEAK6 LLC | $1.79M | 7.63% | 2026-06-30 |
| 5 | Walleye Trading LLC | $1.66M | 7.10% | 2026-06-30 |
| 6 | IMC-Chicago, LLC Custodian | $1.35M | 5.78% | 2026-06-30 |
| 7 | Simplex Trading, LLC Custodian | $1.20M | 5.14% | 2026-06-30 |
| 8 | Wolverine Trading, LLC Custodian | $567.82K | 2.43% | 2025-09-30 |
| 9 | Squarepoint Ops LLC | $554.33K | 2.37% | 2026-06-30 |
| 10 | Walleye Capital LLC | $474.43K | 2.03% | 2026-06-30 |
| 11 | Citadel Advisors LLC Custodian | $374.55K | 1.60% | 2026-06-30 |
| 12 | Two Sigma Investments, LP Custodian | $342.09K | 1.46% | 2026-06-30 |
11 filers$137.79M notional
| # | Filer | Notional Value | % of Total | Period |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC Custodian | $41.74M | 30.29% | 2026-06-30 |
| 2 | Susquehanna International Group, LLP Custodian | $40.39M | 29.31% | 2026-06-30 |
| 3 | Jane Street Group, LLC Custodian | $31.46M | 22.83% | 2026-06-30 |
| 4 | Citadel Advisors LLC Custodian | $13.78M | 10.00% | 2026-06-30 |
| 5 | Walleye Trading LLC | $3.23M | 2.35% | 2026-06-30 |
| 6 | Simplex Trading, LLC Custodian | $2.62M | 1.90% | 2026-06-30 |
| 7 | IMC-Chicago, LLC Custodian | $2.53M | 1.84% | 2026-06-30 |
| 8 | Hartree Partners, LP | $1.50M | 1.09% | 2026-06-30 |
| 9 | Two Sigma Investments, LP Custodian | $272.17K | 0.20% | 2026-06-30 |
| 10 | Wolverine Trading, LLC Custodian | $208.01K | 0.15% | 2025-09-30 |
| 11 | Walleye Capital LLC | $47.44K | 0.03% | 2026-06-30 |
SBLK Insider Trading (Form 4)
Latest: 2026-10-14Form 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 |
|---|---|---|---|---|---|---|---|
| 2026-10-14 | Raffaele Zagari | Director | Mixed | −7,580 | $30.00 | -$227.4K | EDGAR |
| 2026-10-14 | Raffaele Zagari | Director | Mixed | +7,580 | $30.00 | $227.4K | EDGAR |
| 2026-10-07 | Koert Erhardt | Director | Sell (S) | −6,000 | $30.39 | -$182.3K | EDGAR |
| 2026-09-22 | Mahesh Balakrishnan | Director | Sell (S) | −10,000 | $32.34 | -$323.4K | EDGAR |
| 2026-09-22 | Eleni Vrettou | Director | Sell (S) | −3,500 | $32.12 | -$112.4K | EDGAR |
| 2026-09-17 | Charis Plakantonaki | Chief Strategy Officer | Buy (P) | +3,000 | $28.27 | $84.8K | EDGAR |
| 2026-09-17 | Alexandros Pappas | Buy (P) | +74,400 | $28.27 | $2.10M | EDGAR | |
| 2026-09-17 | Nikolaos Reskos | Chief Operating Officer | Buy (P) | +10,000 | $28.27 | $282.7K | EDGAR |
| 2026-09-17 | Milena Maria Pappa | Director | Buy (P) | +74,400 | $28.27 | $2.10M | EDGAR |
| 2026-09-17 | Raffaele Zagari | Director | Buy (P) | +60,000 | $28.27 | $1.70M | EDGAR |
| 2026-09-16 | Koert Erhardt | Director | Buy (P) | +6,000 | $28.27 | $169.6K | EDGAR |
| 2026-09-16 | Symeon Spyrou | co CFO | Buy (P) | +15,000 | $28.27 | $424.1K | EDGAR |
| 2026-09-16 | Nikolaos Karellis | Director | Buy (P) | +2,000 | $28.27 | $56.5K | EDGAR |
| 2026-08-26 | Raffaele Zagari | Director | Sell (S) | −50,000 | $31.20 | -$1.56M | EDGAR |
| 2026-08-25 | Raffaele Zagari | Director | Sell (S) | +50,000 | $30.70 | $1.53M | 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.
SBLK Insider Holdings
16 insiders · @ $29.08
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 | Milena Maria Pappa | Director | 3,170,074 | $92.19M | $2.10M | 2 | 2026-09-17 |
| 2 | Alexandros Pappas | 2,535,150 | $73.72M | $2.10M | 1 | 2026-09-17 | |
| 3 | Raffaele Zagari | Director | 1,983,000 | $57.67M | $2.62B | 8 | 2026-10-14 |
| 4 | Nikolaos Reskos | Chief Operating Officer | 410,875 | $11.95M | -$2.50M | 9 | 2026-09-17 |
| 5 | Spyridon Capralos | Director | 364,176 | $10.59M | $0 | 2 | 2026-08-10 |
| 6 | Hamish Norton | President | 305,847 | $8.89M | $0 | 1 | 2026-06-16 |
| 7 | Symeon Spyrou | co CFO | 241,200 | $7.01M | $424.1K | 2 | 2026-09-16 |
| 8 | Christos Begleris | co CFO | 211,065 | $6.14M | $0 | 1 | 2026-06-16 |
| 9 | Arne Blystad | Director | 115,533 | $3.36M | $0 | 2 | 2026-08-03 |
| 10 | Eleni Vrettou | Director | 73,686 | $2.14M | -$112.4K | 2 | 2026-09-22 |
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.
SBLK Board & Officers
As of SEC filings through Oct 14, 2026Directors 11
- Mahesh Balakrishnan · since Mar 13, 2026
- Arne Blystad · since Mar 16, 2026
- Eleni Vrettou · since Mar 16, 2026
- Gary Weston · since Mar 16, 2026
- Koert Erhardt · since Mar 16, 2026
- Mikkel Storm Weum · since Mar 16, 2026
- Nikolaos Karellis · since Mar 16, 2026
- Spyridon Capralos · since Mar 16, 2026
- Milena Maria Pappa · since Mar 17, 2026
- Raffaele Zagari · since Mar 17, 2026
- Petros Pappas · since Mar 18, 2026
Officers 5
- Hamish Norton · President · since Mar 18, 2026
- Christos Begleris · co CFO · since Mar 16, 2026
- Symeon Spyrou · co CFO · since Mar 16, 2026
- Nikolaos Reskos · Chief Operating Officer · since Mar 16, 2026
- Charis Plakantonaki · Chief Strategy Officer · since Mar 16, 2026
Changes in the last 10 years (16)
| Mar 18, 2026 | Petros Pappas became a director |
| Mar 18, 2026 | Hamish Norton became President |
| Mar 17, 2026 | Raffaele Zagari became a director |
| Mar 17, 2026 | Milena Maria Pappa became a director |
| Mar 16, 2026 | Symeon Spyrou became co CFO |
| Mar 16, 2026 | Spyridon Capralos became a director |
| Mar 16, 2026 | Nikolaos Reskos became Chief Operating Officer |
| Mar 16, 2026 | Nikolaos Karellis became a director |
| Mar 16, 2026 | Mikkel Storm Weum became a director |
| Mar 16, 2026 | Koert Erhardt became a director |
| Mar 16, 2026 | Gary Weston became a director |
| Mar 16, 2026 | Eleni Vrettou became a director |
| Mar 16, 2026 | Christos Begleris became co CFO |
| Mar 16, 2026 | Charis Plakantonaki became Chief Strategy Officer |
| Mar 16, 2026 | Arne Blystad became a director |
| Mar 13, 2026 | Mahesh Balakrishnan became a director |
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.
SBLK Proposed Insider Sales (Form 144)
Latest: 2026-10-05
? Form 144 Guide
Last 30d:
1 filing
· $182K notice value
· Last 90d:
8 filings
· $1.7M notice value
· 6 unique filers
· 38% under 10b5-1 plans
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.
Top 90-day filers:
CHARIS PLAKANTONAKI (2, $636K) · Balakrishnan Mahesh (1, $316K) · NIKOLAOS RESKOS (2, $277K) · SOFIA DAMIGOU (1, $198K) · Erhardt Koert (1, $182K)
| Filed | Filer | Role | Shares | Notice Value | Planned Sale | Broker | Plan | Link |
|---|---|---|---|---|---|---|---|---|
| 2026-10-05 | Erhardt Koert | Director | 6,000 | $182.0K | 2026-10-05 | ALPHA FINANCE | — | EDGAR |
| 2026-09-21 | Vrettou Eleni | Director | 3,500 | $113.7K | 2026-09-21 | PANTELAKIS SECURITIES | — | EDGAR |
| 2026-09-18 | Balakrishnan Mahesh | Director | 10,000 | $315.5K | 2026-09-18 | Fidelity Brokerage Services LLC | — | EDGAR |
| 2026-08-17 | SOFIA DAMIGOU | Officer | 6,821 | $198.2K | 2026-08-17 | Morgan Stanley Smith Barney LLC … | 10b5-1 | EDGAR |
| 2026-08-17 | CHARIS PLAKANTONAKI | Officer | 10,825 | $322.8K | 2026-08-17 | Morgan Stanley Smith Barney LLC … | — | EDGAR |
| 2026-08-14 | CHARIS PLAKANTONAKI | Officer | 10,825 | $313.4K | 2026-08-14 | Morgan Stanley Smith Barney LLC … | — | EDGAR |
| 2026-08-06 | NIKOLAOS RESKOS | Officer | 5,000 | $139.8K | 2026-08-06 | Morgan Stanley Smith Barney LLC … | 10b5-1 | EDGAR |
| 2026-07-30 | NIKOLAOS RESKOS | Director | 5,000 | $136.9K | 2026-07-30 | Morgan Stanley Smith Barney LLC … | 10b5-1 | EDGAR |
| 2026-07-24 | SOFIA DAMIGOU | Officer | 7,500 | $203.6K | 2026-07-24 | Morgan Stanley Smith Barney LLC … | 10b5-1 | EDGAR |
| 2026-06-03 | Karellis Nikolaos | Director | 20,000 | $540.8K | 2026-06-15 | PERSHING 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
15 ETFs hold SBLK
15 shown · $15.07M total exposure · 0.01% AUM-weighted avg weight
| # | ETF | Provider | Weight | $ Exposure | ETF AUM | As Of |
|---|---|---|---|---|---|---|
| 1 | VYM Vanguard High Dividend Yield ETF | Vanguard | 0.01% | $9.9M | — | 2026-09-30 |
| 2 | VT Vanguard Total World Stock ETF | Vanguard | 0.00% | $2.0M | — | 2026-09-30 |
| 3 | FTHI First Trust BuyWrite Income ETF | First Trust | 0.07% | $1.7M | $2.6B | 2026-10-23 |
| 4 | ONEQ Fidelity Nasdaq Composite Index ETF | Fidelity | 0.01% | $804,195 | $10.7B | 2026-10-23 |
| 5 | MMSC First Trust Multi-Manager Small Cap Opportunities ETF | First Trust | 0.38% | $191,181 | $50.6M | 2026-10-23 |
| 6 | MFEM PIMCO RAFI Dynamic Multi-Factor Emerging Markets Equity ETF | PIMCO | 0.12% | $177,068 | $146.8M | 2026-10-23 |
| 7 | AVTM Avantis Total Equity Markets ETF | Avantis | 0.01% | $100,879 | $771.8M | 2026-10-23 |
| 8 | RFLR Innovator U.S. Small Cap Managed Floor ETF | Innovator | 0.08% | $73,572 | $95.0M | 2026-10-26 |
| 9 | ENHE iShares Enhanced Emerging Markets Active ETF | iShares (BlackRock) | 0.21% | $20,634 | $9.8M | 2026-10-23 |
| 10 | HULL Corgi Shipping & Global Logistics ETF | Corgi | 2.15% | $14,831 | $690,932 | 2026-10-26 |
| 11 | KBFR Innovator U.S. Small Cap Managed 10 Buffer ETF | Innovator | 0.11% | $14,540 | $13.3M | 2026-10-26 |
| 12 | VDV Vanguard Developed Markets ex-US Value Index ETF | Vanguard | 0.02% | $9,940 | — | 2026-10-23 |
| 13 | AVSC Avantis U.S. Small Cap Equity ETF | Avantis | 0.00% | $3,101 | $3.2B | 2026-10-23 |
| 14 | AVUC Avantis U.S. Core Equity ETF | Avantis | 0.00% | $985 | $361.4M | 2026-10-23 |
| 15 | AVUS Avantis U.S. Equity ETF | Avantis | 0.00% | $29 | $14.7B | 2026-10-23 |
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
—
TTM Revenue
—
TTM Net Income
—
TTM Op. Cash Flow
—
Quarterly figures (12 quarters)
| Quarter | Period End | Revenue | Net Income | Diluted EPS | Op. Cash Flow |
|---|---|---|---|---|---|
| Q4 '25 | 2025-12-31 | — | — | — | — |
| Q4 '24 | 2024-12-31 | — | — | — | — |
| Q4 '23 | 2023-12-31 | — | — | — | — |
| Q4 '22 | 2022-12-31 | — | — | — | — |
| Q4 '21 | 2021-12-31 | — | — | — | — |
| Q1 '21 | 2021-03-31 | $200.47M | $35.76M | $0.36 | $79.18M |
| Q4 '20 | 2020-12-31 | — | — | — | — |
| Q1 '20 | 2020-03-31 | $160.86M | $2.75M | $0.03 | $32.10M |
| Q4 '19 | 2019-12-31 | — | — | — | — |
| Q4 '18 | 2018-12-31 | — | — | — | — |
| Q4 '17 | 2017-12-31 | — | — | — | — |
| Q4 '16 | 2016-12-31 | — | — | — | — |
Q4 2025 • period ending 2025-12-31 • filed 2026-03-19
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
2.96M
SI % of Float
3.67%
Days to Cover
1.42
Short Vol Ratio
43.5%
Free Float
80.64M
Float %
72.3%
Short interest 2026-09-30 • Short volume 2026-10-26 • Float 2026-05-27