Star Bulk Carriers Corp
Ownership
Ownership Structure
Who owns Star Bulk Carriers Corp (SBLK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 67.6% of the shares are freely tradable; institutional investors hold 38.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Two Sigma Investments LLC | 3.11 | 3,530,020 | +17.2 | 06/30/2026 |
| Renaissance Technologies Corp | 1.82 | 2,067,637 | +13.0 | 03/31/2026 |
| Victory Capital Management Inc. | 1.79 | 2,027,422 | +5.6 | 06/30/2026 |
| Philosophy Capital Management LLC | 1.55 | 1,752,666 | -6.5 | 06/30/2026 |
| The Goldman Sachs Group Inc | 1.53 | 1,737,933 | +173.5 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 1.35 | 1,534,705 | +40.2 | 03/31/2026 |
| Marshall Wace Asset Management Ltd | 1.07 | 1,216,937 | +1,168.9 | 03/31/2026 |
| The Colony Group LLC | 1.00 | 1,139,823 | +9.5 | 03/31/2026 |
| Qube Research & Technologies | 0.96 | 1,086,842 | +0.0 | 03/31/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 0.91 | 1,030,000 | +0.0 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Pappa Milena Maria | Director | 3,167,074 | 93,428,683 $ | Sep 15, 2026 | indirect |
| Pappas Alexandros | Head of Operations | 2,532,150 | 74,698,425 $ | Sep 15, 2026 | indirect |
| Zagari Raffaele | Director | 1,990,580 | 58,722,110 $ | Sep 15, 2026 | both |
| Reskos Nikolaos | Chief Operating Officer | 410,875 | 12,120,813 $ | Sep 15, 2026 | direct |
| Spyrou Symeon | co CFO | 241,200 | 7,115,400 $ | Sep 15, 2026 | direct |
| Vrettou Eleni | Director | 73,686 | 2,173,737 $ | Sep 21, 2026 | direct |
| Plakantonaki Charis | Chief Strategy Officer | 58,778 | 1,733,951 $ | Sep 15, 2026 | direct |
| Balakrishnan Mahesh | Director | 29,080 | 857,860 $ | Sep 18, 2026 | direct |
| Erhardt Koert | Director | 16,080 | 474,360 $ | Sep 15, 2026 | direct |
| Karellis Nikolaos | Director | 9,580 | 282,610 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 21, 2026 | Vrettou Eleni | Director | Sell | 3,500 | 32.12 | 112,420 |
| Sep 18, 2026 | Balakrishnan Mahesh | Director | Sell | 10,000 | 32.34 | 323,400 |
| Sep 15, 2026 | Pappa Milena Maria | Director | Buy | 74,400 | 28.27 | 2,103,288 |
| Sep 15, 2026 | Pappas Alexandros | Head of Operations | Buy | 74,400 | 28.27 | 2,103,288 |
| Sep 15, 2026 | Zagari Raffaele | Director | Buy | 50,000 | 28.27 | 1,413,500 |
| Sep 15, 2026 | Zagari Raffaele | Director | Buy | 10,000 | 28.27 | 282,700 |
| Sep 15, 2026 | Plakantonaki Charis | Chief Strategy Officer | Buy | 3,000 | 28.27 | 84,810 |
| Sep 15, 2026 | Reskos Nikolaos | Chief Operating Officer | Buy | 10,000 | 28.27 | 282,700 |
| Sep 15, 2026 | Karellis Nikolaos | Director | Buy | 2,000 | 28.27 | 56,540 |
| Sep 15, 2026 | Spyrou Symeon | co CFO | Buy | 15,000 | 28.27 | 424,050 |
| Sep 15, 2026 | Erhardt Koert | Director | Buy | 6,000 | 28.27 | 169,620 |
| Aug 25, 2026 | Zagari Raffaele | Director | Sell | 50,000 | 31.20 | 1,560,000 |
| Aug 24, 2026 | Zagari Raffaele | Director | Sell | 50,000 | 30.70 | 1,535,000 |
| Aug 17, 2026 | Plakantonaki Charis | Chief Strategy Officer | Sell | 10,825 | 29.82 | 322,803 |
| Aug 14, 2026 | Plakantonaki Charis | Chief Strategy Officer | Sell | 10,825 | 28.95 | 313,425 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.