← United States · Coverage record
US · SEC FORM 4
Star Bulk Carriers Corp.
SBLK · Nasdaq · CIK 0001386716 · Industrials · Marine Shipping
INSIDER SIGNAL
10 qualifying P purchase groups
in the current 180-day scoring window
43 Form 4 transaction lines observed in the same window
16 sales · 16 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Purchase breadth & concentration
Roles in the peak window: Chief Operating Officer, Chief Strategy Officer, Director, Other, co CFO. Concentration uses priced qualifying P lines only and does not change the saved score.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 10 additional owner(s) remain in Form 4 evidence.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-10-13 · Zagari Raffaele.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.
Price performance
- 1M
- -13.5%
- 3M
- +5.2%
- 6M
- +13.0%
- 12M
- +60.5%
Volatility & liquidity
- Volatility
- 34.1%
- Beta
- —
- Avg daily value
- USD 46.3M
Valuation
- Market cap
- —
- P/E
- —
Fundamentals
- Profit margin
- 8.1%
- ROE
- 3.4%
- Industry
- Marine Shipping
Market data
Price data up to: 2026-10-19 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · Status: PASS
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 2,955,424
- Previous report
- 2,708,879
- Avg daily volume
- 2,077,153
- Days to cover
- 1.4
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-13 | Zagari Raffaele | Purchase (P) | Common shares, par value $0.01 per share | — | USD — | USD — | SEC filing ↗ |
| 2026-09-15 | Zagari Raffaele | Purchase (P) | Common shares, par value $0.01 per share | 60,000 | USD 28.27 | USD 1,696,200 | SEC filing ↗ |
| 2026-09-15 | Reskos Nikolaos | Purchase (P) | Common shares, par value $0.01 per share | 10,000 | USD 28.27 | USD 282,700 | SEC filing ↗ |
| 2026-09-15 | Plakantonaki Charis | Purchase (P) | Common shares par value $ 0.01 per share | 3,000 | USD 28.27 | USD 84,810 | SEC filing ↗ |
| 2026-09-15 | Pappas Alexandros | Purchase (P) | Common Shares par value $0.01 per share | 74,400 | USD 28.27 | USD 2,103,288 | SEC filing ↗ |
| 2026-09-15 | Pappa Milena Maria | Purchase (P) | Common Shares par value $0.01 per share | 74,400 | USD 28.27 | USD 2,103,288 | SEC filing ↗ |
| 2026-09-15 | Spyrou Symeon | Purchase (P) | Common shares, par value $0.01 per share | 15,000 | USD 28.27 | USD 424,050 | SEC filing ↗ |
| 2026-09-15 | Karellis Nikolaos | Purchase (P) | Common shares, par value $0.01 per share | 2,000 | USD 28.27 | USD 56,540 | SEC filing ↗ |
| 2026-09-15 | Erhardt Koert | Purchase (P) | Common shares, par value $0.01 per share | 6,000 | USD 28.27 | USD 169,620 | SEC filing ↗ |
| 2026-06-12 | Blystad Arne | Purchase (P) | Common shares, par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
Form 4 evidence
47 transaction lines in the latest 365-day window; 47 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-13 | Zagari Raffaele | Sale (S) | Common shares, par value $0.01 per share | 7,580 | USD 30.00 | USD 227,400 | SEC filing ↗ |
| 2026-10-13 | Zagari Raffaele | Purchase (P) | Common shares, par value $0.01 per share | — | USD — | USD — | SEC filing ↗ |
| 2026-10-05 | Erhardt Koert | Sale (S) | Common shares, par value $0.01 per share | 6,000 | USD 30.39 | USD 182,340 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-10-13 | Zagari Raffaele | Sale (S) | Common shares, par value $0.01 per share | 7,580 | USD 30.00 | USD 227,400 | SEC filing ↗ |
| 2026-10-13 | Zagari Raffaele | Purchase (P) | Common shares, par value $0.01 per share | — | USD — | USD — | SEC filing ↗ |
| 2026-10-05 | Erhardt Koert | Sale (S) | Common shares, par value $0.01 per share | 6,000 | USD 30.39 | USD 182,340 | SEC filing ↗ |
| 2026-09-21 | Vrettou Eleni | Sale (S) | Common shares, par value $0.01 per share | 3,500 | USD 32.12 | USD 112,420 | SEC filing ↗ |
| 2026-09-18 | Balakrishnan Mahesh | Sale (S) | Common shares, par value $0.01 per share | 10,000 | USD 32.34 | USD 323,400 | SEC filing ↗ |
| 2026-09-15 | Zagari Raffaele | Purchase (P) | Common shares, par value $0.01 per share | 60,000 | USD 28.27 | USD 1,696,200 | SEC filing ↗ |
| 2026-09-15 | Reskos Nikolaos | Purchase (P) | Common shares, par value $0.01 per share | 10,000 | USD 28.27 | USD 282,700 | SEC filing ↗ |
| 2026-09-15 | Plakantonaki Charis | Purchase (P) | Common shares par value $ 0.01 per share | 3,000 | USD 28.27 | USD 84,810 | SEC filing ↗ |
| 2026-09-15 | Pappas Alexandros | Purchase (P) | Common Shares par value $0.01 per share | 74,400 | USD 28.27 | USD 2,103,288 | SEC filing ↗ |
| 2026-09-15 | Pappa Milena Maria | Purchase (P) | Common Shares par value $0.01 per share | 74,400 | USD 28.27 | USD 2,103,288 | SEC filing ↗ |
| 2026-09-15 | Spyrou Symeon | Purchase (P) | Common shares, par value $0.01 per share | 15,000 | USD 28.27 | USD 424,050 | SEC filing ↗ |
| 2026-09-15 | Karellis Nikolaos | Purchase (P) | Common shares, par value $0.01 per share | 2,000 | USD 28.27 | USD 56,540 | SEC filing ↗ |
| 2026-09-15 | Erhardt Koert | Purchase (P) | Common shares, par value $0.01 per share | 6,000 | USD 28.27 | USD 169,620 | SEC filing ↗ |
| 2026-08-25 | Zagari Raffaele | Sale (S) | Common shares, par value $0.01 per share | 50,000 | USD 31.20 | USD 1,560,000 | SEC filing ↗ |
| 2026-08-24 | Zagari Raffaele | Sale (S) | Common shares, par value $0.01 per share | 50,000 | USD 30.70 | USD 1,535,000 | SEC filing ↗ |
| 2026-08-17 | Plakantonaki Charis | Sale (S) | Common shares par value $ 0.01 per share | 10,825 | USD 29.82 | USD 322,802 | SEC filing ↗ |
| 2026-08-14 | Plakantonaki Charis | Sale (S) | Common shares par value $ 0.01 per share | 10,825 | USD 28.95 | USD 313,384 | SEC filing ↗ |
| 2026-08-06 | Capralos Spyridon | Gift (G) | Common shares, par value $0.01 per share | 118,720 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-06 | Reskos Nikolaos | Sale (S) | Common shares, par value $0.01 per share | 5,000 | USD 29.50 | USD 147,500 | SEC filing ↗ |
| 2026-07-30 | Reskos Nikolaos | Sale (S) | Common shares, par value $0.01 per share | 5,000 | USD 28.99 | USD 144,950 | SEC filing ↗ |
| 2026-06-12 | Blystad Arne | Purchase (P) | Common shares, par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Plakantonaki Charis | Award / grant (A) | Common shares par value $ 0.01 per share | 17,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Zagari Raffaele | Award / grant (A) | Common shares, par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Weum Mikkel Storm | Award / grant (A) | Common Stock (Restricted Stock) | 1,760 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Weston Gary | Award / grant (A) | Common shares, par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Vrettou Eleni | Award / grant (A) | Common shares, par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Spyrou Symeon | Award / grant (A) | Common shares, par value $0.01 per share | 26,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Reskos Nikolaos | Award / grant (A) | Common shares, par value $0.01 per share | 48,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Pappa Milena Maria | Award / grant (A) | Common Shares par value $0.01 per share | 7,580 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-12 | Norton Hamish | Award / grant (A) | Common shares, par value $0.01 per share | 35,800 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-19 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | SBLK |
| CIK | 0001386716 |
| Sector | Industrials |
| Industry | Marine Shipping Yahoo Finance |
| SEC SIC | 4412 Deep Sea Foreign Transportation of Freight |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 47 transaction lines from 2026-04-08 to 2026-10-13 11 P purchase lines · 20 S sale lines · 16 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.