Company · Ownership research

OIL STATES INTERNATIONAL, INC OIS

CIK 0001121484 · CUSIP 678026105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 678026105 (OIS), not CUSIP 678026905 (OIS), and does not merge CUSIPs.

This page lists the top 20 of 220 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$73.44M 6,309,631 shares	0.00%	-348.18K(-5.20%)Reduced	SEC filing ↗ May 13, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$41.00M 3,522,143 shares	0.01%	+89.46K(+2.60%)Added	SEC filing ↗ May 7, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$28.14M 2,417,559 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$27.37M 2,352,385 shares	0.04%	-86.24K(-3.50%)Reduced	SEC filing ↗ May 13, 2026	▾
05	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$25.23M 2,167,272 shares	0.02%	-481.84K(-18.20%)Reduced	SEC filing ↗ May 15, 2026	▾
06	First Eagle Investment Management, LLC CIK 1325447 · Amended · View history	$23.79M 2,043,709 shares	0.04%	-537.97K(-20.80%)Reduced	SEC filing ↗ May 14, 2026	▾
07	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$21.51M 1,848,308 shares	0.01%	+233.18K(+14.40%)Added	SEC filing ↗ May 15, 2026	▾
08	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$21.24M 1,824,715 shares	0.01%	+44.17K(+2.50%)Added	SEC filing ↗ May 15, 2026	▾
09	STATE STREET CORP CIK 93751 · View history	$20.18M 1,733,499 shares	0.00%	+283.81K(+19.60%)Added	SEC filing ↗ May 15, 2026	▾
10	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$19.05M 1,636,824 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$15.81M 1,357,790 shares	0.00%	+35.16K(+2.70%)Added	SEC filing ↗ May 15, 2026	▾
12	MORGAN STANLEY CIK 895421 · View history	$15.72M 1,350,160 shares	0.00%	+368.32K(+37.50%)Added	SEC filing ↗ May 15, 2026	▾
13	Driehaus Capital Management LLC CIK 938206 · View history	$15.46M 1,328,078 shares	0.11%	+1.33MNew	SEC filing ↗ May 15, 2026	▾
14	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$13.17M 1,131,609 shares	0.00%	-15.39K(-1.30%)Reduced	SEC filing ↗ May 15, 2026	▾
15	KENNEDY CAPITAL MANAGEMENT LLC CIK 884589 · View history	$12.55M 1,078,399 shares	0.27%	-374.13K(-25.80%)Reduced	SEC filing ↗ May 13, 2026	▾
16	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$12.49M 1,073,304 shares	0.01%	+475.59K(+79.60%)Added	SEC filing ↗ May 15, 2026	▾
17	HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC CIK 1164833 · View history	$11.65M 1,001,051 shares	0.04%	-702.85K(-41.20%)Reduced	SEC filing ↗ May 15, 2026	▾
18	MARSHALL WACE, LLP CIK 1318757 · View history	$10.86M 932,772 shares	0.01%	+932.77KNew	SEC filing ↗ May 15, 2026	▾
19	UBS Group AG CIK 1610520 · View history	$9.93M 853,474 shares	0.00%	+343.59K(+67.40%)Added	SEC filing ↗ May 5, 2026	▾
20	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$9.70M 832,905 shares	0.19%	-80.21K(-8.80%)Reduced	SEC filing ↗ May 15, 2026	▾

Showing 20 / 220 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

220

Cancelled or null records excluded

Disclosed shares

54,381,024

Not deduplicated across managers

Disclosed value

$632.62M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

OIL STATES INTERNATIONAL, INC · Q1 2026

Explore all 220 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.