Oil States International Inc
Ownership
Ownership Structure
Who owns Oil States International Inc (OIS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 92.0% of the shares are freely tradable; institutional investors hold 92.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 10.46 | 6,309,631 | -5.2 | 03/31/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 6.65 | 4,011,354 | +96.3 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 4.98 | 3,006,491 | -14.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.01 | 2,417,559 | +0.0 | 03/31/2026 |
| Acadian Asset Management LLC | 3.90 | 2,352,385 | +703.8 | 03/31/2026 |
| American Century Companies Inc | 3.67 | 2,213,177 | +19.7 | 06/30/2026 |
| D. E. Shaw & Co LP | 3.35 | 2,017,956 | -6.9 | 06/30/2026 |
| AQR Capital Management LLC | 3.02 | 1,824,715 | +2.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 3.26 | 1,969,050 | +0.1 | 08/31/2026 |
| First Eagle Small Cap Opportunity I | 3.16 | 1,907,240 | +8.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.