OIL STATES INTERNATIONAL INC (OIS) Institutional Ownership Changes & 13F Activity
OIL STATES INTERNATIONAL INC (OIS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Driehaus Capital Management Llc, Gendell Jeffrey L, Marshall Wace, Llp, Hotchkis & Wiley Capital Management Llc, and Millennium Management Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| M&T Bank Corp | Sell | -212,346 | -95.4% | 10,257 | $119.39K | Q1 2026 | Sep 04, 2026 |
| Algert Global Llc | Sell | -13,496 | -48.7% | 14,210 | $165.40K | Q1 2026 | Aug 11, 2026 |
| Brighton Jones Llc | Buy | +18,738 | — | 18,738 | $218.11K | Q1 2026 | Aug 07, 2026 |
| Wells Fargo & Company/Mn | Sell | -40,829 | -64.4% | 22,545 | $262.42K | Q1 2026 | Jul 08, 2026 |
| Bank Of America Corp | Sell | -41,093 | -30.7% | 92,836 | $1.08M | Q1 2026 | May 18, 2026 |
| California State Teachers Retirement System | Sell | -419 | -12.1% | 3,053 | $35.54K | Q1 2026 | May 18, 2026 |
| Driehaus Capital Management Llc | Buy | +1,328,078 | — | 1,328,078 | $15.46M | Q1 2026 | May 15, 2026 |
| Gendell Jeffrey L | Sell | -1,266,952 | -80.9% | 298,317 | $3.47M | Q1 2026 | May 15, 2026 |
| Marshall Wace, Llp | Buy | +932,772 | — | 932,772 | $10.86M | Q1 2026 | May 15, 2026 |
| Hotchkis & Wiley Capital Management Llc | Sell | -702,850 | -41.2% | 1,001,051 | $11.65M | Q1 2026 | May 15, 2026 |
| Millennium Management Llc | Buy | +692,025 | +5587.2% | 704,411 | $8.20M | Q1 2026 | May 15, 2026 |
| D. E. Shaw & Co., Inc. | Sell | -481,836 | -18.2% | 2,167,272 | $25.23M | Q1 2026 | May 15, 2026 |
| Two Sigma Investments, Lp | Buy | +475,587 | +79.6% | 1,073,304 | $12.49M | Q1 2026 | May 15, 2026 |
| Morgan Stanley | Buy | +368,321 | +37.5% | 1,350,160 | $15.72M | Q1 2026 | May 15, 2026 |
| State Street Corp | Buy | +283,812 | +19.6% | 1,733,499 | $20.18M | Q1 2026 | May 15, 2026 |
| American Century Companies Inc | Buy | +233,176 | +14.4% | 1,848,308 | $21.51M | Q1 2026 | May 15, 2026 |
| Trexquant Investment Lp | Buy | +228,714 | +70.9% | 551,183 | $6.42M | Q1 2026 | May 15, 2026 |
| Goldman Sachs Group Inc | Buy | +215,957 | +44.4% | 702,085 | $8.17M | Q1 2026 | May 15, 2026 |
| Barclays Plc | Sell | -125,609 | -66.6% | 62,995 | $733.26K | Q1 2026 | May 15, 2026 |
| Citadel Advisors Llc | Sell | -85,766 | -66.9% | 42,482 | $494.49K | Q1 2026 | May 15, 2026 |
| Bridgeway Capital Management, Llc | Sell | -80,214 | -8.8% | 832,905 | $9.70M | Q1 2026 | May 15, 2026 |
| Engineers Gate Manager Lp | Buy | +78,649 | +519.9% | 93,777 | $1.09M | Q1 2026 | May 15, 2026 |
| Qube Research & Technologies Ltd | Sell | -76,636 | -27.9% | 198,511 | $2.31M | Q1 2026 | May 15, 2026 |
| Point72 Asset Management, L.P. | Buy | +70,343 | — | 70,343 | $818.79K | Q1 2026 | May 15, 2026 |
| Susquehanna International Group, Llp | Buy | +68,587 | +219.1% | 99,890 | $1.16M | Q1 2026 | May 15, 2026 |
| Cambria Investment Management, L.P. | Buy | +58,712 | — | 58,712 | $683.41K | Q1 2026 | May 15, 2026 |
| Gotham Asset Management, Llc | Buy | +57,963 | — | 57,963 | $674.69K | Q1 2026 | May 15, 2026 |
| Harvest Investment Services, Llc | Buy | +48,320 | — | 48,320 | $562.45K | Q1 2026 | May 15, 2026 |
| Aqr Capital Management Llc | Buy | +44,171 | +2.5% | 1,824,715 | $21.24M | Q1 2026 | May 15, 2026 |
| Boothbay Fund Management, Llc | Buy | +36,532 | — | 36,532 | $425.23K | Q1 2026 | May 15, 2026 |
Frequently asked questions about OIS activity
Which institutional owners are buying OIS?
Institutional owners buying OIS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in OIS activity?
"Buy" means an investor increased their reported position in OIS compared to the prior reporting period. This reflects growing exposure to OIL STATES INTERNATIONAL INC (OIS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in OIS increasing?
Institutional interest in OIS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related OIS Institutional Insights
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- Energy Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
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- OIS Insider Trading & SEC Form 4 Activity
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