Oil States International, Inc. (OIS) Ownership
OIS ownership summary
as of October 18, 2026- Institutions
- 89.8% of shares outstanding
- Insiders
- 7.95% of shares outstanding
- Shares outstanding
- 60.3M
- Float
- 55.5M shares available to trade
- Short interest
- 3.90% 2.2M shares short
- Days to cover
- 3.80 short interest down 7.2% vs prior month
- Institutions 89.85%
- Insiders 7.95%
- Other investors 2.21%
OIS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 11.30% | 6.8M | $55.4M | +508,651 (+8.1%) | June 30, 2026 |
| 2 | Arnhold & S. Bleichroeder Advisers, LLC | 6.65% | 4.0M | $32.6M | +2.0M (+96.3%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 4.98% | 3.0M | $24.4M | −515,652 (−14.6%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.01% | 2.4M | $19.6M | +547 (+0.0%) | June 30, 2026 |
| 5 | American Century Companies Inc | 3.67% | 2.2M | $18.0M | +364,869 (+19.7%) | June 30, 2026 |
| 6 | Acadian Asset Management LLC | 3.39% | 2.0M | $16.6M | −310,097 (−13.2%) | June 30, 2026 |
| 7 | D. E. Shaw & Co LP | 3.35% | 2.0M | $16.4M | −149,316 (−6.9%) | June 30, 2026 |
| 8 | State Street Corp | 3.28% | 2.0M | $16.1M | +247,410 (+14.3%) | June 30, 2026 |
| 9 | AQR Capital Management LLC | 2.88% | 1.7M | $14.1M | −87,805 (−4.8%) | June 30, 2026 |
| 10 | Vanguard Portfolio Management, LLC | 2.69% | 1.6M | $13.2M | −11,726 (−0.7%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 2.40% | 1.4M | $11.7M | +87,918 (+6.5%) | June 30, 2026 |
| 12 | Two Sigma Investments LLC | 2.40% | 1.4M | $11.7M | +371,472 (+34.6%) | June 30, 2026 |
| 13 | Kennedy Capital Management Inc | 2.14% | 1.3M | $10.5M | +212,741 (+19.7%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 2.00% | 1.2M | $9.8M | −144,030 (−10.7%) | June 30, 2026 |
| 15 | Qube Research & Technologies | 1.86% | 1.1M | $9.1M | +923,875 (+465.4%) | June 30, 2026 |
| 16 | Hotchkis & Wiley Capital Management LLC | 1.82% | 1.1M | $8.9M | +99,150 (+9.9%) | June 30, 2026 |
| 17 | Charles Schwab Investment Management Inc | 1.80% | 1.1M | $8.8M | −47,622 (−4.2%) | June 30, 2026 |
| 18 | Bridgeway Capital Management, LLC | 1.39% | 840K | $6.8M | +7,332 (+0.9%) | June 30, 2026 |
| 19 | Algert Global LLC | 1.35% | 814K | $6.6M | +799,761 (+5,628.2%) | June 30, 2026 |
| 20 | Millennium Management LLC | 1.11% | 668K | $5.4M | −36,569 (−5.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 5.6M shares and 8 cut 1.3M.
OIS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 3.36% | 2.0M | $16.4M | +2,184 (+0.1%) | September 30, 2026 |
| 2 | First Eagle Small Cap Opportunity I | 3.32% | 2.0M | $16.3M | — | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.85% | 1.7M | $14.0M | — | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 2.42% | 1.5M | $11.9M | −16,832 (−1.1%) | September 30, 2026 |
| 5 | Vanguard Energy ETF | 1.17% | 704K | $5.7M | −1,434 (−0.2%) | September 30, 2026 |
| 6 | DFA US Small Cap Value I | 1.11% | 671K | $5.5M | −54,551 (−7.5%) | August 31, 2026 |
| 7 | Fidelity Small Cap Index | 1.03% | 623K | $5.1M | +4,444 (+0.7%) | July 31, 2026 |
| 8 | Fidelity Enhanced Small Cap Core ETF | 0.98% | 589K | $4.8M | +1,233 (+0.2%) | September 30, 2026 |
| 9 | BlackRock Advantage Small Cap Core Instl | 0.92% | 553K | $4.5M | +9,728 (+1.8%) | August 31, 2026 |
| 10 | iShares Russell 2000 Value ETF | 0.87% | 526K | $4.3M | +798 (+0.2%) | September 30, 2026 |
| 11 | Federated Hermes MDT Small Cap Core IS | 0.86% | 518K | $4.2M | +209,467 (+67.8%) | June 30, 2026 |
| 12 | EA Bridgeway Omni Small-Cap Value ETF | 0.72% | 435K | $3.5M | — | September 30, 2026 |
| 13 | Schwab Fundamental U.S. Small CompanyETF | 0.68% | 408K | $3.3M | +574 (+0.1%) | September 30, 2026 |
| 14 | Stt Strt®SPDR®S&P®Oil &GasEqpmnt&SvcsETF | 0.58% | 349K | $2.8M | +5,350 (+1.6%) | September 30, 2026 |
| 15 | Vanguard Russell 2000 ETF | 0.55% | 332K | $2.7M | +3,619 (+1.1%) | September 30, 2026 |
| 16 | North Square Dynamic Small Cap I | 0.52% | 312K | $2.5M | +311,942 (0.0%) | June 30, 2026 |
| 17 | Vanguard Strategic Small-Cap Equity Inv | 0.51% | 307K | $2.5M | — | June 30, 2026 |
| 18 | Dimensional US Small Cap Value ETF | 0.49% | 293K | $2.4M | — | September 24, 2026 |
| 19 | iShares U.S. Small-Cap Eq Fac ETF | 0.47% | 284K | $2.3M | — | September 30, 2026 |
| 20 | Fidelity Extended Market Index | 0.46% | 277K | $2.3M | −1,491 (−0.5%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OIS insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-16 | Cindy B Taylor | Sell | $6.75 | 14,760 | $99,630 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OIS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OIS
Institutional investors own 89.8% of Oil States International's shares and insiders 7.95%. The largest holder is BlackRock Inc with 11.30% of the shares (6.8M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 8 reduced their stake in the latest filings. Short interest is 3.90% of the float, or 3.80 days of average trading volume. The share count rose 9.9% since 2014.
Related: OIS analyst forecast, OIS key metrics. See the OIS stock overview for the latest quote and news.
OIS ownership FAQ
Who owns the most Oil States International stock?
The largest shareholders of Oil States International are BlackRock Inc (11.30%), Arnhold & S. Bleichroeder Advisers, LLC (6.65%), Dimensional Fund Advisors, Inc. (4.98%), Vanguard Capital Management, LLC (4.01%), American Century Companies Inc (3.67%).
What percentage of Oil States International is owned by institutions?
Institutions hold 89.8% of Oil States International's shares outstanding; insiders hold 7.95%.
Which funds own Oil States International?
The largest fund holders of Oil States International are Avantis US Small Cap Value ETF (3.36%), First Eagle Small Cap Opportunity I (3.32%), Vanguard MStar Total Stk Mkt Idx Invest (2.85%), iShares Russell 2000 ETF (2.42%), Vanguard Energy ETF (1.17%).
What is Oil States International's short interest?
2.2M shares of Oil States International were sold short, 3.90% of the float; at the average daily volume it would take 3.80 days to cover.
Are insiders buying or selling Oil States International?
Of the latest 1 reported insider transactions in Oil States International (since December 16, 2025), 0 were purchases and 1 were sales.
How many shares of Oil States International are outstanding?
Oil States International has 60.3M shares outstanding, of which 55.5M are in the public float.