Latest Period
Q1 2026
Security Snapshot
OIL STATES INTERNATIONAL, INC - Common Stock (OIS) Institutional Ownership
CUSIP: 678026105
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
213
Shares (Excl. Options)
54,001,672
Price
$11.64
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- Security type / class
- Equity / Common Stock
- Symbol
- OIS on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 54,001,672
- Total 13F value
- $628,201,299
- Portfolio coverage rank
- 0%
- Share change
- +2,943,661
- Value change
- +$37,888,760
- Number of holders
- 213
- Shares outstanding
- 61,951,626
- SEC-reported price per share
- $8.90
- Insider filing price
- $8.90
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- OIS - OIL STATES INTERNATIONAL, INC - Common Stock is tracked under CUSIP 678026105.
- 213 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 179 to 213 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $345,487,036 to $628,201,299.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 213 institutions filings for Q1 2026.
Security key
678026105
Latest holder period
Q1 2026
13F holders
213
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
OIS full holder history
OIL STATES INTERNATIONAL, INC SEC filings
OIL STATES INTERNATIONAL, INC company facts
OIL STATES INTERNATIONAL, INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 678026105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
OIS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.4% | $16,273,037 | 4,596,903 | BlackRock, Inc. | 31 Mar 2025 | |||
| DIMENSIONAL FUND ADVISORS LP | 5.1% | $11,321,908 | 3,198,279 | Dimensional Fund Advisors LP | 31 Mar 2025 |
As of 31 Mar 2026, 213 institutional investors reported holding 54,001,672 shares of OIL STATES INTERNATIONAL, INC - Common Stock (OIS). This represents 87% of the company’s total 61,951,626 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
65%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10% | 6,309,631 | -5.2% | 0% | $73,444,103 |
| DIMENSIONAL FUND ADVISORS LP | 5.7% | 3,522,143 | +2.6% | 0.01% | $40,997,966 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9% | 2,417,559 | 0% | 0% | $28,140,387 |
| ACADIAN ASSET MANAGEMENT LLC | 3.8% | 2,352,385 | -3.5% | 0.04% | $27,368,000 |
| D. E. Shaw & Co., Inc. | 3.5% | 2,167,272 | -18% | 0.02% | $25,227,046 |
| First Eagle Investment Management, LLC | 3.3% | 2,043,709 | -21% | 0.04% | $23,788,772 |
| AMERICAN CENTURY COMPANIES INC | 3% | 1,848,308 | +14% | 0.01% | $21,514,305 |
| AQR CAPITAL MANAGEMENT LLC | 2.9% | 1,824,715 | +2.5% | 0.01% | $21,239,683 |
| STATE STREET CORP | 2.8% | 1,733,499 | +20% | 0% | $20,177,928 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.6% | 1,636,824 | 0% | 0% | $19,052,631 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 1,357,790 | +2.7% | 0% | $15,808,754 |
| MORGAN STANLEY | 2.2% | 1,350,160 | +38% | 0% | $15,715,862 |
| Driehaus Capital Management LLC | 2.1% | 1,328,078 | 0.11% | $15,458,828 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.8% | 1,131,609 | -1.3% | 0% | $13,171,929 |
| KENNEDY CAPITAL MANAGEMENT LLC | 1.7% | 1,078,399 | -26% | 0.27% | $12,552,564 |
| TWO SIGMA INVESTMENTS, LP | 1.7% | 1,073,304 | +80% | 0.01% | $12,493,259 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 1.6% | 1,001,051 | -41% | 0.04% | $11,652,234 |
| MARSHALL WACE, LLP | 1.5% | 932,772 | 0.01% | $10,857,467 | |
| UBS Group AG | 1.4% | 853,474 | +67% | 0% | $9,934,438 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1.3% | 832,905 | -8.8% | 0.19% | $9,695,014 |
| JPMORGAN CHASE & CO | 1.3% | 821,868 | -24% | 0% | $9,517,231 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.2% | 721,401 | +69% | 0% | $8,397,108 |
| MILLENNIUM MANAGEMENT LLC | 1.1% | 704,411 | +5587% | 0.01% | $8,199,344 |
| GOLDMAN SACHS GROUP INC | 1.1% | 702,085 | +44% | 0% | $8,172,269 |
| Trexquant Investment LP | 0.89% | 551,183 | +71% | 0.05% | $6,415,770 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 54,001,672 | $628,201,299 | +$37,888,760 | $11.64 | 213 |
| 2025 Q4 | 51,021,373 | $345,487,036 | -$13,618,985 | $6.77 | 179 |
| 2025 Q3 | 53,111,386 | $321,855,422 | +$8,352,770 | $6.06 | 157 |
| 2025 Q2 | 51,783,709 | $277,570,133 | +$5,203,200 | $5.36 | 151 |
| 2025 Q1 | 50,995,052 | $262,633,068 | +$11,046,119 | $5.15 | 157 |
| 2024 Q4 | 49,100,165 | $248,445,460 | -$1,434,150 | $5.06 | 148 |
| 2024 Q3 | 49,327,241 | $226,914,057 | -$16,485,542 | $4.60 | 150 |
| 2024 Q2 | 52,688,198 | $233,963,485 | -$26,377,022 | $4.44 | 145 |
| 2024 Q1 | 56,366,205 | $347,214,522 | -$20,240,801 | $6.16 | 169 |
| 2023 Q4 | 59,411,508 | $403,367,900 | +$11,925,147 | $6.79 | 179 |
| 2023 Q3 | 57,221,775 | $478,989,380 | +$1,738,714 | $8.37 | 174 |
| 2023 Q2 | 57,358,404 | $428,477,633 | -$1,449,648 | $7.47 | 171 |
| 2023 Q1 | 57,293,197 | $477,243,789 | -$4,473,233 | $8.33 | 169 |
| 2022 Q4 | 58,074,200 | $433,255,862 | +$9,755,427 | $7.46 | 151 |
| 2022 Q3 | 56,949,752 | $221,595,012 | -$958,522 | $3.89 | 149 |
| 2022 Q2 | 57,031,238 | $309,029,502 | -$1,717,236 | $5.42 | 151 |
| 2022 Q1 | 57,681,121 | $400,799,611 | +$26,739,831 | $6.95 | 155 |
| 2021 Q4 | 53,797,492 | $267,246,765 | -$1,261,818 | $4.97 | 132 |
| 2021 Q3 | 53,915,558 | $344,274,710 | -$11,097,135 | $6.39 | 136 |
| 2021 Q2 | 55,188,826 | $433,145,397 | +$38,168,767 | $7.85 | 141 |
| 2021 Q1 | 50,696,811 | $305,677,968 | +$6,800,946 | $6.03 | 138 |
| 2020 Q4 | 49,741,926 | $249,704,764 | +$7,997,753 | $5.02 | 130 |
| 2020 Q3 | 49,079,601 | $134,008,108 | -$9,183,734 | $2.73 | 131 |
| 2020 Q2 | 51,932,989 | $246,752,804 | -$22,689,747 | $4.75 | 139 |
| 2020 Q1 | 58,087,036 | $117,917,295 | -$66,434,633 | $2.03 | 129 |