Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
305 institutional managers reported holding STNG for the quarter ended Mar 31, 2026. Together they hold about 74% of shares outstanding; the top 10 hold 36%. 76 opened new positions; 36 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 3.57M | 7.67% | $266.9M | added +2.4% | ≤2013 |
| Dimensional Fund Advisors | 3.13M | 6.72% | $233.7M | added +4.1% | 2013 Q3 |
| LSV Asset Management | 1.70M | 3.66% | $127.2M | trimmed -1.4% | 2023 Q3 |
| Two Sigma | 1.39M | 2.98% | $103.8M | added +275.6% | 2025 Q4 |
| Victory Capital Management INC | 1.32M | 2.84% | $98.8M | added +6.7% | 2023 Q3 |
| T. Rowe Price Investment Management, INC. | 1.29M | 2.78% | $96.6M | added +154.1% | 2025 Q3 |
| Renaissance Technologies | 1.19M | 2.55% | $88.6M | trimmed -3.1% | 2022 Q2 |
| American Century Companies INC | 1.01M | 2.17% | $75.4M | trimmed -48.2% | 2021 Q1 |
| Vanguard Group | 985.8k | 2.12% | $73.7M | trimmed -37.2% | ≤2013 |
| Squarepoint Ops LLC | 963.8k | 2.07% | $72.0M | added +4.7% | 2024 Q2 |
| Goldman Sachs | 924.6k | 1.99% | $69.1M | trimmed -9.9% | ≤2013 |
| Assenagon Asset Management S.a. | 918.2k | 1.97% | $68.6M | added +7.6% | 2024 Q2 |
| AQR Capital | 859.2k | 1.85% | $64.2M | added +24.4% | 2021 Q3 |
| Geode Capital | 840.3k | 1.80% | $62.8M | added +3.3% | ≤2013 |
| State Street | 736.6k | 1.58% | $55.0M | added +0.5% | ≤2013 |
| Qube Research & Technologies LTD | 644.0k | 1.38% | $48.1M | added +28.7% | 2022 Q3 |
| Morgan Stanley | 483.8k | 1.04% | $36.1M | trimmed -18.4% | ≤2013 |
| Boston Partners | 445.9k | 0.96% | $33.3M | added +491.1% | 2021 Q1 |
| Summit Street Capital Management, LLC (focused) | 419.0k | 0.90% | $31.3M | unchanged | 2025 Q2 |
| Tudor Investment | 378.7k | 0.81% | $28.3M | added +31.7% | 2025 Q3 |
| Jane Street | 356.6k | 0.77% | $26.6M | trimmed -47.6% | 2018 Q3 |
| Ameriprise Financial INC | 355.6k | 0.76% | $26.6M | trimmed -10.4% | 2022 Q3 |
| Balyasny Asset Management | 345.9k | 0.74% | $25.8M | added +38.2% | 2024 Q4 |
| Northern Trust | 335.9k | 0.72% | $25.1M | added +3.9% | ≤2013 |
| Millennium Management | 327.3k | 0.70% | $24.5M | trimmed -48.5% | 2020 Q3 |
| Bridgeway Capital Management, LLC | 258.4k | 0.56% | $19.3M | added +5.8% | 2024 Q4 |
| Trexquant Investment LP | 244.6k | 0.53% | $18.3M | added +100.9% | 2025 Q4 |
| Bank OF America CORP /DE/ | 244.4k | 0.53% | $18.3M | added +9.3% | ≤2013 |
| Empowered Funds, LLC | 240.5k | 0.52% | $18.0M | added +20.9% | 2024 Q4 |
| First Eagle Investment Management | 235.1k | 0.51% | $17.6M | added +9.8% | 2024 Q2 |
| TCW Group INC | 232.4k | 0.50% | $17.4M | added +6% | 2020 Q2 |
| Charles Schwab Investment Management | 230.8k | 0.50% | $17.2M | added +56.9% | ≤2013 |
| UBS | 230.1k | 0.49% | $17.2M | added +43.2% | ≤2013 |
| Acadian Asset Management | 223.3k | 0.48% | $16.7M | added +1037% | 2022 Q3 |
| Private Management Group INC | 208.5k | 0.45% | $15.6M | trimmed -16.7% | 2021 Q1 |
| Cooper Creek Partners Management LLC | 204.1k | 0.44% | $15.2M | trimmed -71.1% | 2024 Q3 |
| Barclays PLC | 203.6k | 0.44% | $15.2M | added +32.4% | 2016 Q2 |
| Encompass Capital Advisors LLC | 200.0k | 0.43% | $14.9M | unchanged | 2025 Q2 |
| Point72 | 194.6k | 0.42% | $14.5M | trimmed -28% | 2025 Q4 |
| ExodusPoint | 183.6k | 0.39% | $13.7M | added +108.3% | 2025 Q3 |
| Ticino Wealth | 180.7k | 0.39% | $13.5M | trimmed -3.6% | 2025 Q4 |
| DNB Asset Management AS | 179.8k | 0.39% | $13.4M | trimmed -28.2% | 2025 Q2 |
| HRT Financial LP | 176.8k | 0.38% | $13.2M | added +164.1% | 2025 Q4 |
| Hosking Partners LLP | 173.7k | 0.37% | $13.0M | trimmed -7.7% | 2016 Q4 |
| FMR (Fidelity) | 171.4k | 0.37% | $12.8M | trimmed -67.5% | 2021 Q2 |
| Citadel Advisors | 170.1k | 0.36% | $12.7M | trimmed -16.4% | ≤2013 |
| Russell Investments Group, LTD. | 169.0k | 0.36% | $12.6M | added +63.9% | 2016 Q4 |
| Fearnley Asset Management AS (focused) | 162.0k | 0.35% | $12.1M | opened | 2026 Q1 |
| CastleKnight Management LP | 142.2k | 0.30% | $10.6M | added +343% | 2025 Q1 |
| Arrowstreet Capital | 135.6k | 0.29% | $10.1M | trimmed -76.2% | 2022 Q4 |
Largest 50 of 305 shown; the full ranked, searchable register is at boothcheck.com/holders/STNG. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.