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SBLK

Star Bulk Carriers Corp.
$25.15 +0.34 (+1.37%) At close · Jul 2
Market Cap
$2.81B
Shares
113,424,507

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 189
Total Value: $929,603,186
Total Shares: 40,470,322
Showing 1–100 of 198 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Superinvestors Holding SBLK

All superinvestors →
Ray Dalio $12,664,027 Joel Greenblatt $496,152

Holder Concentration

Across 189 13F filers · Δ vs Dec 31, 2025
Top Holder
7.4%
Jun 2023 → Mar 2026 · range 7.4% – 52.7%
−9.2 pts
Top 5
26.2%
Jun 2023 → Mar 2026 · range 26.2% – 71.4%
−12.1 pts
Top 10
44.0%
Jun 2023 → Mar 2026 · range 44.0% – 80.7%
−9.7 pts
HHI
290
Jun 2023 → Mar 2026 · range 290 – 2,940
Broadly held−212

Quarterly Activity

vs Dec 31, 2025
New
48
Increased
58
Decreased
55
Sold Out
35
Unchanged
28
Holder count: +13
Institutional value: +38.1%
Shares held: +15.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega TWO SIGMA INVESTMENTS, LP +2,450,563 3,012,963
Large MARSHALL WACE, LLP +1,121,032 1,216,937
Mega GOLDMAN SACHS GROUP INC +1,102,539 1,737,933
Mega D. E. Shaw & Co., Inc. +1,074,736 1,173,877
Mega JANE STREET GROUP, LLC +1,042,287 1,611,789

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega AMERIPRISE FINANCIAL INC −2,106,777 39,854
Mega UBS Group AG −712,086 203,892
Mega FIL Ltd −312,457 32,583
Mid Jump Financial, LLC −256,616 219,485
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −247,243 1,192,267

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VICTORY CAPITAL MANAGEMENT INC 1,920,289 $44,109,038
Large Qube Research & Technologies Ltd 1,086,842 $24,964,760
Mid COOPER CREEK PARTNERS MANAGEMENT LLC 866,033 $19,892,778
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 757,426 $17,398,075
Large TUDOR INVESTMENT CORP ET AL 735,010 $16,883,179

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega ALLIANCEBERNSTEIN L.P. 5,832,805 $112,106,512
Mid OAKTREE CAPITAL MANAGEMENT LP 1,962,892 $37,726,784
Mega FRANKLIN RESOURCES INC 463,275 $8,904,145
Mega VANGUARD GROUP INC 441,631 $8,488,146
Small ARMOR ADVISORS, L.L.C. 328,390 $6,311,655
Filter: New 48 Increased 58 Reduced 55 Sold out 35 Unchanged 28
Showing 100 of 198
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega TWO SIGMA INVESTMENTS, LP $69,207,760 7.44% 3,012,963
Large RENAISSANCE TECHNOLOGIES LLC $47,493,621 5.11% 2,067,637
Mega VICTORY CAPITAL MANAGEMENT INC $44,109,038 4.74% 1,920,289
Small Philosophy Capital Management LLC $43,055,381 4.63% 1,874,418
Mega GOLDMAN SACHS GROUP INC $39,920,320 4.29% 1,737,933
Large Boston Partners $37,359,418 4.02% 1,626,444
Mega MORGAN STANLEY $35,252,172 3.79% 1,534,705
Large MARSHALL WACE, LLP $27,953,042 3.01% 1,216,937
Mega D. E. Shaw & Co., Inc. $26,963,954 2.90% 1,173,877
Large Focus Partners Wealth $26,181,734 2.82% 1,139,823
Large Qube Research & Technologies Ltd $24,964,760 2.69% 1,086,842
Mega JANE STREET GROUP, LLC $22,579,510 2.43% 983,000
Small FEARNLEY ASSET MANAGEMENT AS $21,849,201 2.35% 951,206
Mid COOPER CREEK PARTNERS MANAGEMENT LLC $19,892,778 2.14% 866,033
Large Allianz Asset Management GmbH $18,363,159 1.98% 799,441
Large Point72 Asset Management, L.P. $18,144,806 1.95% 789,935
Large HRT FINANCIAL LP $17,715,084 1.91% 771,227
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $17,398,075 1.87% 757,426
Large DNB Asset Management AS $17,084,741 1.84% 743,785
Large TUDOR INVESTMENT CORP ET AL $16,883,179 1.82% 735,010
Mega MILLENNIUM MANAGEMENT LLC $16,526,937 1.78% 719,501
Mega JPMORGAN CHASE & CO $14,988,957 1.61% 652,545
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $13,892,256 1.49% 604,800
Mega BlackRock, Inc. $13,793,366 1.48% 600,495
Mega BANK OF AMERICA CORP /DE/ Bank $12,990,957 1.40% 565,562
Large Bridgewater Associates, LP $12,664,027 1.36% 551,329
Mega JANE STREET GROUP, LLC $12,640,137 1.36% 550,289
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $12,002,927 1.29% 522,548
Small Marnell Management LLC $9,883,577 1.06% 430,282
Mega CITADEL ADVISORS LLC $9,446,388 1.02% 411,249
Large Russell Investments Group, Ltd. $8,716,007 0.94% 379,452
Small VALUEWORKS LLC $8,151,157 0.88% 354,861
Mid Engineers Gate Manager LP $7,192,067 0.77% 313,107
Mid XTX Topco Ltd $7,046,506 0.76% 306,770
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,957,613 0.75% 302,900
Large Walleye Capital LLC $6,598,660 0.71% 287,273
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,536,503 0.70% 284,567
Mega LPL Financial LLC $6,265,366 0.67% 272,763
Mid GSA CAPITAL PARTNERS LLP $6,196,754 0.67% 269,776
Mega CITADEL ADVISORS LLC $6,176,633 0.66% 268,900
Large PEAK6 LLC $5,409,435 0.58% 235,500
Mid Jump Financial, LLC $5,041,570 0.54% 219,485
Small Counterpoint Mutual Funds LLC Mutual Fund $4,787,568 0.52% 208,427
Mega UBS Group AG $4,683,397 0.50% 203,892
Mid Campbell & CO Investment Adviser LLC $4,213,915 0.45% 183,453
Large Schonfeld Strategic Advisors LLC $3,583,940 0.39% 156,027
Mega GEODE CAPITAL MANAGEMENT, LLC $3,539,837 0.38% 154,107
Small Hartree Partners, LP $3,445,500 0.37% 150,000
Mid Y-Intercept (Hong Kong) Ltd $3,329,386 0.36% 144,945
Small Numerai GP LLC $3,285,950 0.35% 143,054
Large ExodusPoint Capital Management, LP $3,219,521 0.35% 140,162
Large KLP KAPITALFORVALTNING AS $3,215,800 0.35% 140,000
Small Manatuck Hill Partners, LLC $3,073,386 0.33% 133,800
Mega CITADEL ADVISORS LLC $2,919,487 0.31% 127,100
Large Marex Group plc $2,894,771 0.31% 126,024
Small Impala Asset Management LLC $2,756,400 0.30% 120,000
Mega STATE STREET CORP $2,654,091 0.29% 115,546
Mid Aquatic Capital Management LLC $2,652,506 0.29% 115,477
Small CFM WEALTH PARTNERS LLC $2,628,342 0.28% 114,425
Mid WINTON GROUP Ltd $2,425,379 0.26% 105,589
Large Walleye Trading LLC $2,297,000 0.25% 100,000
Small Mraz, Amerine & Associates, Inc. $2,250,853 0.24% 97,991
Mega BNP PARIBAS ARBITRAGE, SA $2,230,318 0.24% 97,097
Mid RBF Capital, LLC $1,952,450 0.21% 85,000
Small Buckland Partners Management Co LLC $1,943,032 0.21% 84,590
Small DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD. $1,883,540 0.20% 82,000
Large Squarepoint Ops LLC $1,867,277 0.20% 81,292
Mega JANE STREET GROUP, LLC $1,803,145 0.19% 78,500
Mega NORTHERN TRUST CORP Bank $1,759,409 0.19% 76,596
Mid Artemis Investment Management LLP $1,740,505 0.19% 75,773
Micro GRAHAM CAPITAL WEALTH MANAGEMENT, LLC $1,712,436 0.18% 74,551
Large STIFEL FINANCIAL CORP $1,705,361 0.18% 74,243
Large Tidal Investments LLC $1,592,533 0.17% 69,331
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,575,994 0.17% 68,611
Small Headlands Technologies LLC $1,511,770 0.16% 65,815
Large Cetera Investment Advisers $1,500,101 0.16% 65,307
Small Relyea Zuckerberg Hanson LLC $1,479,038 0.16% 64,390
Small FOX RUN MANAGEMENT, L.L.C. $1,477,981 0.16% 64,344
Mega RAYMOND JAMES FINANCIAL INC $1,255,884 0.14% 54,675
Mid Raiffeisen Bank International AG Bank $1,207,716 0.13% 52,578
Mid Dakota Wealth Management $1,203,444 0.13% 52,392
Mid HORIZON KINETICS ASSET MANAGEMENT LLC $1,189,156 0.13% 51,770
Small BTG Pactual Asset Management US LLC $1,184,884 0.13% 51,584
Large Pathstone Holdings, LLC $998,688 0.11% 43,478
Small Dynamic Technology Lab Private Ltd $995,106 0.11% 43,322
Mega HSBC HOLDINGS PLC $921,097 0.10% 40,100
Mega AMERIPRISE FINANCIAL INC $915,446 0.10% 39,854
Mid Glenorchy Capital Ltd $889,995 0.10% 38,746
Mid Magnetar Financial LLC $856,596 0.09% 37,292
Large Centiva Capital, LP $846,283 0.09% 36,843
Small NBC SECURITIES, INC. Broker-Dealer $813,712 0.09% 35,425
Large Balyasny Asset Management L.P. $755,023 0.08% 32,870
Large Walleye Capital LLC $748,822 0.08% 32,600
Mega FIL Ltd $748,431 0.08% 32,583
Small ION Fund Management Ltd $695,301 0.07% 30,270
Mid MANGROVE PARTNERS IM, LLC $617,066 0.07% 26,864
Mid GROUP ONE TRADING LLC $586,332 0.06% 25,526
Small R Squared Ltd $580,980 0.06% 25,293
Mid SIMPLEX TRADING, LLC $578,706 0.06% 25,194
Small TWO SIGMA SECURITIES, LLC Broker-Dealer $575,995 0.06% 25,076
Key facts CIK 1386716 CUSIP Y8162K204 13F (30d) 11 filings 4 filers Visit website Investor relations

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