Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in SBLK held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | TWO SIGMA INVESTMENTS, LP | 3.6M | $88.8M | +18.0% | 3.187% | 0.06% |
| 2 | BlackRock, Inc. | 2.8M | $70.3M | +369.2% | 2.526% | 0.00% |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2.4M | $59.4M | +99.4% | 2.132% | 0.00% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 2.1M | $52.4M | +1.6% | 1.883% | 0.07% |
| 5 | VICTORY CAPITAL MANAGEMENT INC | 2.0M | $50.6M | +5.6% | 1.818% | 0.03% |
| 6 | GOLDMAN SACHS GROUP INC | 2.0M | $50.3M | +15.9% | 1.806% | 0.00% |
| 7 | Philosophy Capital Management LLC | 1.8M | $43.8M | -6.5% | 1.571% | 2.07% |
| 8 | JANE STREET GROUP, LLC | 1.7M | $42.8M | +6.4% | 1.538% | 0.00% |
| 9 | Focus Partners Wealth | 1.3M | $31.6M | +10.9% | 1.133% | 0.03% |
| 10 | CITADEL ADVISORS LLC | 1.2M | $29.0M | +43.8% | 1.041% | 0.00% |
| 11 | Qube Research & Technologies Ltd | 1.2M | $28.9M | +6.4% | 1.037% | 0.03% |
| 12 | MORGAN STANLEY | 1.0M | $26.0M | -32.2% | 0.933% | 0.00% |
| 13 | FEARNLEY ASSET MANAGEMENT AS | 1.0M | $25.1M | +5.6% | 0.900% | 9.02% |
| 14 | Encompass Capital Advisors LLC | 963K | $24.0M | — | 0.863% | 0.85% |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 926K | $23.1M | +22.3% | 0.831% | 0.01% |
| 16 | Allianz Asset Management GmbH | 893K | $22.3M | +11.7% | 0.800% | 0.01% |
| 17 | Boston Partners | 788K | $19.7M | -51.5% | 0.707% | 0.02% |
| 18 | MARSHALL WACE, LLP | 787K | $19.6M | -35.4% | 0.705% | 0.02% |
| 19 | Artemis Investment Management LLP | 762K | $19.0M | +905.2% | 0.683% | 0.17% |
| 20 | Marex Group Ltd | 728K | $18.2M | +477.7% | 0.653% | 0.08% |
| 21 | Bridgewater Associates, LP | 718K | $17.9M | +30.2% | 0.644% | 0.07% |
| 22 | JPMORGAN CHASE & CO | 676K | $16.6M | +3.5% | 0.606% | 0.00% |
| 23 | D. E. Shaw & Co., Inc. | 591K | $14.8M | -49.6% | 0.530% | 0.01% |
| 24 | DnB Asset Management AS | 586K | $14.6M | -21.2% | 0.525% | 0.04% |
| 25 | Marnell Management LLC | 516K | $12.9M | +19.9% | 0.462% | 4.95% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SBLK — a direct measure of their conviction.
Filings activity in SBLK during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 204 | +8.5% | 39.88% | +3.36 pp | $1.08B | +21% |
| Q1 2026 | 188 | +9.3% | 36.52% | +5.49 pp | $890M | +33% |
| Q4 2025 | 172 | +6.2% | 31.03% | +0.08 pp | $671M | +16% |
| Q3 2025 | 162 | 3.0% | 30.95% | 1.56 pp | $578M | 2.3% |
| Q2 2025 | 167 | 7.7% | 32.51% | +0.35 pp | $592M | +3.7% |
| Q1 2025 | 181 | 15% | 32.16% | 1.15 pp | $571M | +0.4% |
| Q4 2024 | 214 | 0.5% | 33.31% | 8.21 pp | $569M | 46% |
| Q3 2024 | 215 | — | 41.52% | — | $1.06B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SBLK stock.
Based on Q2 2026 13F filings, institutional ownership of Star Bulk Carriers Corp. stands at 39.9%, held across 204 reporting institutions.
TWO SIGMA INVESTMENTS, LP is the largest reported institutional holder of SBLK, with approximately 3,554,620 shares worth $0.09B as of Q2 2026.
Yes — 6 widely-followed marquee investors appear among the top 25 institutional holders of SBLK, including TWO SIGMA INVESTMENTS, LP, SUSQUEHANNA INTERNATIONAL GROUP, LLP, RENAISSANCE TECHNOLOGIES LLC, JANE STREET GROUP, LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for SBLK is 80 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
30 institutions opened new positions in SBLK during Q2 2026, while 19 fully exited. 115 added to existing positions and 51 trimmed.
SBLK institutional ownership rose by 3.36 percentage points quarter-over-quarter, with a net change of +16 holders.
The top 10 institutions account for 48.1% of all reported 13F value in SBLK, and the top 25 account for 76.2%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Star Bulk Carriers Corp. (SBLK) Institutional Ownership