STAR BULK CARRIERS CORP. SBLK
SHS PAR · Common Stock · CUSIP Y8162K204 · ISIN MHY8162K2046
- SectorIndustrials
- IndustryDeep Sea Foreign Transportation of Freight
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($406.5k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $17.26. Options: 12 managers hold calls ($45.2m notional), 11 hold puts ($25.5m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 164 |
| Q4 2022 | 160 |
| Q1 2023 | 173 |
| Q2 2023 | 160 |
| Q3 2023 | 152 |
| Q4 2023 | 178 |
| Q1 2024 | 205 |
| Q2 2024 | 244 |
| Q3 2024 | 224 |
| Q4 2024 | 221 |
| Q1 2025 | 191 |
| Q2 2025 | 174 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 72 | 74 |
| Q4 2023 | 91 | 63 |
| Q1 2024 | 117 | 78 |
| Q2 2024 | 170 | 78 |
| Q3 2024 | 105 | 126 |
| Q4 2024 | 98 | 123 |
| Q1 2025 | 104 | 106 |
| Q2 2025 | 56 | 106 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $40.3m | $43.1m | 1.07 |
| Q4 2024 | $17.0m | $24.3m | 1.43 |
| Q1 2025 | $22.9m | $19.9m | 0.87 |
| Q2 2025 | $45.2m | $25.5m | 0.56 |
Biggest buyers
| ALLIANCEBERNSTEIN L.P. | New | +3.8m |
| VICTORY CAPITAL MANAGEMENT INC | New | +1.9m |
| GOLDMAN SACHS GROUP INC | Added | +297.8k |
| UBS Group AG | Added | +261.2k |
| Allianz Asset Management GmbH | Added | +170.5k |
| BlackRock, Inc. | Added | +159.4k |
| CITADEL ADVISORS LLC | New | +148.9k |
| CAPITAL ADVISORY GROUP ADVISORY SERVICES, LLC | New | +118.9k |
| AMERIPRISE FINANCIAL INC | Added | +107.1k |
| Walleye Capital LLC | New | +61.4k |
Biggest sellers
| OAKTREE CAPITAL MANAGEMENT LP | Reduced | -2.1m |
| Amundi | Sold out | -1.9m |
| BANK OF AMERICA CORP /DE/ | Reduced | -1.1m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -958.4k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Sold out | -689.8k |
| TWO SIGMA ADVISERS, LP | Reduced | -512.1k |
| Ramirez Asset Management, Inc. | Reduced | -500.7k |
| Balyasny Asset Management L.P. | Reduced | -343.2k |
| KETTLE HILL CAPITAL MANAGEMENT, LLC | Sold out | -308.5k |
| Grand Alliance Asset Management Ltd | Reduced | -280.0k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $23.1m1.3m shares |
| CITADEL ADVISORS LLC | Added | $5.4m314.6k shares |
| GROUP ONE TRADING LLC | Added | $4.9m283.1k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $3.4m196.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $3.1m176.9k shares |
| JANE STREET GROUP, LLC | Added | $2.3m135.4k shares |
| IMC-Chicago, LLC | Added | $1.1m61.3k shares |
| SIG BROKERAGE, LP | New | $862.5k50.0k shares |
| WOLVERINE TRADING, LLC | Added | $647.1k37.8k shares |
| Walleye Capital LLC | Reduced | $405.4k23.5k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $12.7m734.9k shares |
| GROUP ONE TRADING LLC | Added | $3.9m228.3k shares |
| SIMPLEX TRADING, LLC | Added | $2.3m134.3k shares |
| Walleye Capital LLC | Reduced | $1.6m92.4k shares |
| CITADEL ADVISORS LLC | Reduced | $1.5m85.5k shares |
| Walleye Trading LLC | Reduced | $1.2m66.8k shares |
| CAPITAL FUND MANAGEMENT S.A. | Reduced | $1.1m64.8k shares |
| SIG BROKERAGE, LP | New | $517.5k30.0k shares |
| Caption Management, LLC | Unchanged | $483.0k28.0k shares |
| JANE STREET GROUP, LLC | Reduced | $262.2k15.2k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Famatown Finance Ltd
13D · may seek influence
+0.4 pts · filed 2025-10-06
Stated purposeOn October 3, 2025, Mr. Mikkel Storm Weum, an investment director of Seatankers Management AS ("Seatankers"), an entity that is related to the Reporting Persons, was appointed as a director of the Issuer (the "Director"). A copy of the Issuer's press release is attached as Exhibit B. The Common Shares that the Reporting Persons may be deemed to beneficially own are held for investment or other purposes, but as the Director is both a director of the Issuer and an investment director of Seatankers, the Reporting Persons may be deemed to have control over the management and policies of the Issuer. In the future, the Reporting Persons may be involved in and may plan for his involvement in any or all of the following: (a) The acquisition of additional Common Shares of the Issuer, or the disp… Full filing |
11.8% |
| Danaos Corp 13G · passive investor new · filed 2025-05-09 | 5.2% |
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio | 3.8m $64.9m | New |
| OAKTREE CAPITAL MANAGEMENT LP 1.10% of their portfolio | 3.2m $55.7m | Reduced -2.1m |
| UBS Group AG 0.01% of their portfolio | 3.1m $53.7m | Added +261.2k |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 1.9m $33.5m | Added +52.0k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 1.9m $33.2m | New |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 1.6m $28.1m | Added +107.1k |
| Philosophy Capital Management LLC 3.36% of their portfolio | 1.5m $26.7m | Added +28.5k |
| BlackRock, Inc. 0.00% of their portfolio | 1.5m $26.7m | Added +159.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 1.2m $20.5m | Reduced -112.0k |
| Focus Partners Wealth 0.04% of their portfolio | 955.6k $16.5m | Added +17.4k |
| DNB Asset Management AS 0.06% of their portfolio | 813.4k $14.0m | Added +14.8k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 685.0k $11.8m | Reduced -958.4k |
| TWO SIGMA ADVISERS, LP 0.02% of their portfolio | 549.1k $9.5m | Reduced -512.1k |
| MORGAN STANLEY 0.00% of their portfolio | 507.2k $8.7m | Reduced -252.7k |
| Grand Alliance Asset Management Ltd 9.75% of their portfolio | 500.0k $8.6m | Reduced -280.0k |
| Allianz Asset Management GmbH 0.01% of their portfolio | 484.5k $8.4m | Added +170.5k |
| VANGUARD GROUP INC 0.00% of their portfolio | 456.4k $7.9m | Added +9.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 392.3k $6.8m | Added +297.8k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 389.3k $6.7m | Reduced -300 |
| Gilman Hill Asset Management, LLC 1.10% of their portfolio | 388.8k $6.7m | Reduced -1.4k |
| VALUEWORKS LLC 2.08% of their portfolio | 365.6k $6.3m | Added +1.3k |
| ARMOR ADVISORS, L.L.C. 5.63% of their portfolio | 328.4k $5.7m | Reduced -5.7k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 321.3k $5.5m | Reduced -140.6k |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 253.6k $4.4m | Reduced -343.2k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 250.5k $4.3m | Reduced -1.1m |
| 683 Capital Management, LLC 0.39% of their portfolio | 225.0k $3.9m | Reduced -75.0k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 182.6k $3.2m | Reduced -60.9k |
| Boston Partners 0.00% of their portfolio | 171.2k $3.0m | Added +45.8k |
| LPL Financial LLC 0.00% of their portfolio | 160.7k $2.8m | Reduced -14.0k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 150.4k $2.6m | Reduced -13.2k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 148.9k $2.6m | New |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 144.1k $2.5m | Reduced -55.4k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 131.1k $2.3m | Added +13.8k |
| Relyea Zuckerberg Hanson LLC 0.25% of their portfolio | 125.4k $2.2m | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 122.1k $2.1m | Added +2.7k |
| STATE STREET CORP 0.00% of their portfolio | 121.8k $2.1m | Reduced -3.0k |
| CAPITAL ADVISORY GROUP ADVISORY SERVICES, LLC 0.74% of their portfolio | 118.9k $2.1m | New |
| CFM WEALTH PARTNERS LLC 0.31% of their portfolio | 112.6k $1.9m | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 103.8k $1.8m | Reduced -56.1k |
| Mraz, Amerine & Associates, Inc. 0.28% of their portfolio | 101.8k $1.8m | Reduced -10.5k |
| GROUP ONE TRADING LLC 0.06% of their portfolio | 101.7k $1.8m | Reduced -83.5k |
| Janney Montgomery Scott LLC 0.00% of their portfolio | 96.8k $1.7m | Reduced -3.5k |
| Manatuck Hill Partners, LLC 0.61% of their portfolio | 93.8k $1.6m | Reduced -58.7k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.01% of their portfolio | 92.2k $1.6m | Reduced -205 |
| NORTHERN TRUST CORP 0.00% of their portfolio | 89.5k $1.5m | Reduced -2.7k |
| Dakota Wealth Management 0.03% of their portfolio | 89.4k $1.5m | Reduced -5.5k |
| RBF Capital, LLC 0.08% of their portfolio | 88.9k $1.5m | Unchanged |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 84.4k $1.5m | Added +34.9k |
| NORGES BANK 0.00% of their portfolio | 83.7k $1.4m | Reduced -74.7k |
| Raiffeisen Bank International AG 0.02% of their portfolio | 64.1k $1.1m | Added +7.9k |
| Walleye Capital LLC 0.01% of their portfolio | 61.4k $1.1m | New |
| Walleye Trading LLC 0.02% of their portfolio | 52.4k $904.5k | New |
| HORIZON KINETICS ASSET MANAGEMENT LLC 0.01% of their portfolio | 49.6k $854.8k | Added +3.7k |
| Tidal Investments LLC 0.01% of their portfolio | 49.5k $853.9k | Added +5.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 49.5k $853.4k | Added +43.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 47.3k $816.2k | Added +19 |
| Squarepoint Ops LLC 0.00% of their portfolio | 43.6k $751.3k | Reduced -47.0k |
| Gotham Asset Management, LLC 0.00% of their portfolio | 41.6k $717.6k | Unchanged |
| Private Advisor Group, LLC 0.00% of their portfolio | 41.3k $712.6k | Added +1.8k |
| LANARK FINANCIAL, INC. 0.05% of their portfolio | 38.3k $661.0k | Unchanged |
| Moors & Cabot, Inc. 0.03% of their portfolio | 37.2k $642.6k | Reduced -14.0k |
| Verition Fund Management LLC 0.00% of their portfolio | 34.8k $600.7k | New |
| Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio | 33.2k $573.0k | Reduced -9.9k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 32.8k $566.4k | Reduced -173.9k |
| Essex Financial Services, Inc. 0.04% of their portfolio | 31.8k $548.4k | Reduced -310 |
| MQS Management LLC 0.30% of their portfolio | 31.0k $535.4k | New |
| Ion Asset Management Ltd. 0.03% of their portfolio | 30.3k $522.2k | Unchanged |
| Apollon Wealth Management, LLC 0.01% of their portfolio | 30.2k $521.8k | Added +6.9k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 28.8k $496.7k | Reduced -36.7k |
| Ancora Advisors LLC 0.01% of their portfolio | 28.2k $486.4k | Unchanged |
| Glenorchy Capital Ltd 0.35% of their portfolio | 27.4k $473.2k | Reduced -24.9k |
| CAPITAL FUND MANAGEMENT S.A. 0.01% of their portfolio | 26.7k $460.2k | Reduced -49.1k |
| SIG BROKERAGE, LP 0.12% of their portfolio | 24.9k $430.3k | New |
| INDEPENDENT FINANCIAL GROUP, LLC 0.01% of their portfolio | 24.9k $429.6k | Reduced -3.9k |
| Golden State Wealth Management, LLC 0.05% of their portfolio | 24.6k $424.7k | Reduced -10.4k |
| EAGLE HARBOR ASSET MANAGEMENT INC /ADV 0.40% of their portfolio | 23.8k $410.6k | Unchanged |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 23.7k $409.0k | Reduced -7.8k |
| Michels Family Financial, LLC 0.35% of their portfolio | 23.5k $406.2k | Reduced -1.8k |
| B. Riley Wealth Advisors, Inc. 0.02% of their portfolio | 22.0k $380.2k | Reduced -36.1k |
| Sippican Capital Advisors 0.27% of their portfolio | 21.9k $377.6k | Added +15 |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 20.7k $357.5k | Added +6.9k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 19.9k $343.7k | Unchanged |
| National Philanthropic Trust 0.00% of their portfolio | 19.4k $334.3k | Unchanged |
| Mariner, LLC 0.00% of their portfolio | 19.1k $328.7k | Reduced -34.8k |
| Sigma Planning Corp 0.01% of their portfolio | 18.9k $325.4k | Reduced -5.1k |
| DAVENPORT & Co LLC 0.00% of their portfolio | 17.8k $306.6k | Added +4.8k |
| Cetera Investment Advisers 0.00% of their portfolio | 17.7k $304.9k | Reduced -8.5k |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 17.5k $301.6k | Reduced -4.3k |
| Pathstone Holdings, LLC 0.00% of their portfolio | 16.1k $278.0k | New |
| Vident Advisory, LLC 0.00% of their portfolio | 16.0k $276.2k | Reduced -62.0k |
| Glenmede Investment Management, LP 0.00% of their portfolio | 15.5k $268.0k | First filing |
| Intrua Financial, LLC 0.04% of their portfolio | 15.2k $262.2k | Unchanged |
| Caption Management, LLC 0.02% of their portfolio | 15.0k $258.8k | Unchanged |
| Rossby Financial, LCC 0.10% of their portfolio | 15.0k $258.8k | Added +2.5k |
| EXCHANGE TRADED CONCEPTS, LLC 0.00% of their portfolio | 14.6k $252.7k | Reduced -491 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 13.7k $236.2k | Added +616 |
| Advisory Services Network, LLC 0.00% of their portfolio | 13.4k $244.1k | New |
| SBI Securities Co., Ltd. 0.01% of their portfolio | 13.3k $229.2k | Reduced -6.9k |
| CITIGROUP INC 0.00% of their portfolio | 13.2k $228.1k | Added +3.4k |
| Arrow Investment Advisors, LLC 0.22% of their portfolio | 13.2k $227.9k | New |