Who owns SBLK (SBLK)
Which tracked institutional funds hold SBLK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SBLK company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
76 tracked funds added or opened SBLK while 28 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
SBLK’s largest tracked holder by dollar value, ALLIANCEBERNSTEIN L.P., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in SBLK divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 189 tracked filers holding SBLK, 109 increased or opened the position and 86 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in SBLK between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 30
- VICTORY CAPITAL MANAGEMENT INC$44M
- Qube Research & Technologies Ltd$25M
- COOPER CREEK PARTNERS MANAGEMENT LLC$20M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$17M
- TUDOR INVESTMENT CORP ET AL$17M
- VANGUARD PORTFOLIO MANAGEMENT LLC$8M
Full exits 12
- ALLIANCEBERNSTEIN L.P.$112M
- OAKTREE CAPITAL MANAGEMENT LP$38M
- FRANKLIN RESOURCES INC$9M
- VANGUARD GROUP INC$8M
- ARMOR ADVISORS, L.L.C.$6M
- TWO SIGMA ADVISERS, LP$4M
Largest adds
- TWO SIGMA INVESTMENTS, LP$58M
- GOLDMAN SACHS GROUP INC$28M
- MARSHALL WACE, LLP$26M
- D. E. Shaw & Co., Inc.$25M
- Boston Partners$21M
- HRT FINANCIAL LP$17M
Largest trims
- AMERIPRISE FINANCIAL INC$40M
- UBS Group AG$13M
- FIL Ltd$6M
- Jump Financial, LLC$4M
- GROUP ONE TRADING LLC$4M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$3M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| TWO SIGMA INVESTMENTS, LP added | 3,012,963 | $69M | 6.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 2,067,637 | $47M | 4.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 1,920,289 | $44M | 4.0% | 2026-Q1 |
| Philosophy Capital Management LLC added | 1,874,418 | $43M | 3.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,737,933 | $40M | 3.6% | 2026-Q1 |
| Boston Partners added | 1,626,444 | $37M | 3.4% | 2026-Q1 |
| MORGAN STANLEY added | 1,534,705 | $35M | 3.2% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,216,937 | $28M | 2.5% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 1,173,877 | $27M | 2.4% | 2026-Q1 |
| Focus Partners Wealth added | 1,139,823 | $26M | 2.4% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 1,086,842 | $25M | 2.3% | 2026-Q1 |
| FEARNLEY ASSET MANAGEMENT AS added | 951,206 | $22M | 2.0% | 2026-Q1 |
| COOPER CREEK PARTNERS MANAGEMENT LLC new | 866,033 | $20M | 1.8% | 2026-Q1 |
| Allianz Asset Management GmbH added | 799,441 | $18M | 1.7% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 789,935 | $18M | 1.6% | 2026-Q1 |
| HRT FINANCIAL LP added | 771,227 | $18M | 1.6% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 757,426 | $17M | 1.6% | 2026-Q1 |
| DNB Asset Management AS trimmed | 743,785 | $17M | 1.5% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 735,010 | $17M | 1.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 719,501 | $17M | 1.5% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 652,545 | $14M | 1.3% | 2026-Q1 |
| BlackRock, Inc. added | 600,495 | $14M | 1.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 565,562 | $13M | 1.2% | 2026-Q1 |
| Bridgewater Associates, LP trimmed | 551,329 | $13M | 1.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 550,289 | $13M | 1.1% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 522,548 | $12M | 1.1% | 2026-Q1 |
| Marnell Management LLC added | 430,282 | $10M | 0.9% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 411,249 | $9M | 0.9% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 379,452 | $9M | 0.8% | 2026-Q1 |
| VALUEWORKS LLC trimmed | 354,861 | $8M | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 349,404 | $8M | 0.7% | 2026-Q1 |
| Engineers Gate Manager LP added | 313,107 | $7M | 0.7% | 2026-Q1 |
| XTX Topco Ltd added | 306,770 | $7M | 0.6% | 2026-Q1 |
| Walleye Capital LLC added | 287,273 | $7M | 0.6% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 284,567 | $7M | 0.6% | 2026-Q1 |
| LPL Financial LLC added | 272,763 | $6M | 0.6% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 269,776 | $6M | 0.6% | 2026-Q1 |
| Jump Financial, LLC trimmed | 219,485 | $5M | 0.5% | 2026-Q1 |
| Counterpoint Mutual Funds LLC new | 208,427 | $5M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 203,892 | $5M | 0.4% | 2026-Q1 |
| Campbell & CO Investment Adviser LLC added | 183,453 | $4M | 0.4% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 156,027 | $4M | 0.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 154,107 | $4M | 0.3% | 2026-Q1 |
| Hartree Partners, LP trimmed | 150,000 | $3M | 0.3% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 144,945 | $3M | 0.3% | 2026-Q1 |
| Numerai GP LLC added | 143,054 | $3M | 0.3% | 2026-Q1 |
| ExodusPoint Capital Management, LP trimmed | 140,162 | $3M | 0.3% | 2026-Q1 |
| KLP KAPITALFORVALTNING AS trimmed | 140,000 | $3M | 0.3% | 2026-Q1 |
| Manatuck Hill Partners, LLC trimmed | 133,800 | $3M | 0.3% | 2026-Q1 |
| Marex Group plc added | 126,024 | $3M | 0.3% | 2026-Q1 |
| Impala Asset Management LLC trimmed | 120,000 | $3M | 0.2% | 2026-Q1 |
| STATE STREET CORP trimmed | 115,546 | $3M | 0.2% | 2026-Q1 |
| Aquatic Capital Management LLC trimmed | 115,477 | $3M | 0.2% | 2026-Q1 |
| CFM WEALTH PARTNERS LLC added | 114,425 | $3M | 0.2% | 2026-Q1 |
| NORGES BANK trimmed | 158,413 | $2M | 0.2% | 2026-Q1 |
| WINTON GROUP Ltd new | 105,589 | $2M | 0.2% | 2026-Q1 |
| Mraz, Amerine & Associates, Inc. trimmed | 97,991 | $2M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 97,097 | $2M | 0.2% | 2026-Q1 |
| RBF Capital, LLC | 85,000 | $2M | 0.2% | 2026-Q1 |
| Buckland Partners Management Co LLC | 84,590 | $2M | 0.2% | 2026-Q1 |
| DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD. new | 82,000 | $2M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC added | 81,292 | $2M | 0.2% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 76,596 | $2M | 0.2% | 2026-Q1 |
| Artemis Investment Management LLP trimmed | 75,773 | $2M | 0.2% | 2026-Q1 |
| GRAHAM CAPITAL WEALTH MANAGEMENT, LLC new | 74,551 | $2M | 0.2% | 2026-Q1 |
| STIFEL FINANCIAL CORP trimmed | 74,243 | $2M | 0.2% | 2026-Q1 |
| Tidal Investments LLC added | 69,331 | $2M | 0.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 68,611 | $2M | 0.1% | 2026-Q1 |
| Headlands Technologies LLC added | 65,815 | $2M | 0.1% | 2026-Q1 |
| Cetera Investment Advisers added | 65,307 | $2M | 0.1% | 2026-Q1 |
| Relyea Zuckerberg Hanson LLC trimmed | 64,390 | $1M | 0.1% | 2026-Q1 |
| FOX RUN MANAGEMENT, L.L.C. added | 64,344 | $1M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 54,675 | $1M | 0.1% | 2026-Q1 |
| Raiffeisen Bank International AG trimmed | 52,578 | $1M | 0.1% | 2026-Q1 |
| Dakota Wealth Management trimmed | 52,392 | $1M | 0.1% | 2026-Q1 |
| HORIZON KINETICS ASSET MANAGEMENT LLC added | 51,770 | $1M | 0.1% | 2026-Q1 |
| BTG Pactual Asset Management US LLC added | 51,584 | $1M | 0.1% | 2026-Q1 |
| Pathstone Holdings, LLC trimmed | 43,478 | $999K | 0.1% | 2026-Q1 |
| Dynamic Technology Lab Private Ltd trimmed | 43,322 | $995K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 5,832,805 | $112M | 10.2% | 2025-Q4 stale |
| OAKTREE CAPITAL MANAGEMENT LP | 1,962,892 | $38M | 3.4% | 2025-Q4 stale |
| AMUNDI added | 1,868,249 | $27M | 2.4% | 2025-Q1 stale |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. new | 689,818 | $11M | 1.0% | 2025-Q1 stale |
| FRANKLIN RESOURCES INC added | 463,275 | $9M | 0.8% | 2025-Q4 stale |
| Grand Alliance Asset Management Ltd trimmed | 500,000 | $9M | 0.8% | 2025-Q2 stale |
| VANGUARD GROUP INC added | 441,631 | $8M | 0.8% | 2025-Q4 stale |
| Gilman Hill Asset Management, LLC trimmed | 388,847 | $7M | 0.6% | 2025-Q2 stale |
| ARMOR ADVISORS, L.L.C. | 328,390 | $6M | 0.6% | 2025-Q4 stale |
| KETTLE HILL CAPITAL MANAGEMENT, LLC new | 308,547 | $5M | 0.4% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 233,800 | $4M | 0.4% | 2025-Q4 stale |
| MIRABELLA FINANCIAL SERVICES LLP trimmed | 151,818 | $3M | 0.3% | 2025-Q3 stale |
| Vienna Powszechne Towarzystwo Emerytalne S.A. Vienna Insurance Group | 173,769 | $3M | 0.2% | 2025-Q1 stale |
| DEUTSCHE BANK AG\ added | 136,199 | $3M | 0.2% | 2025-Q4 stale |
| CREDIT AGRICOLE S A added | 120,600 | $2M | 0.2% | 2025-Q4 stale |
| Capital Advisory Group Advisory Services, LLC trimmed | 116,870 | $2M | 0.2% | 2025-Q4 stale |
| 683 Capital Management, LLC trimmed | 100,000 | $2M | 0.2% | 2025-Q3 stale |
| Janney Montgomery Scott LLC trimmed | 96,832 | $2M | 0.2% | 2025-Q2 stale |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 80,545 | $1M | 0.1% | 2025-Q1 stale |
| Invesco Ltd. trimmed | 54,407 | $1M | 0.1% | 2025-Q3 stale |
| WEXFORD CAPITAL LP trimmed | 53,448 | $994K | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.