OIL STS INTL INC (OIS) is held by 124 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling OIS?

In Q1 2026, 80 institutions opened or increased positions in OIL STS INTL INC while 46 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on OIS?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for OIL STS INTL INC.

How many hedge funds hold OIS?

124 institutional investors report holding OIL STS INTL INC (OIS) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into OIS?

As of Q1 2026, tracked institutions in OIL STS INTL INC show 80 buyers versus 46 sellers — net inflows.

OIL STS INTL INC

OIS·678026105·US·Common Stock·Energy - Oil & Gas Equipment & Services-13D/G

124

Holders

Avg rating(33 Elite)

$544.1M

Total Value

63% (131)

Fund Consensus

80 buying - 46 selling

Smart Money Verdict

View all

Held by 124 funds

33 elite

Who's Trading

Activist

Dimensional Fund Advisors LP5.0%Jul 14, 2026

InsiderHAHAJDIK LLOYD AVest 67K shMay 1, 2026

InsiderMSMoses Philip ScottVest 13K shMay 1, 2026

InsiderAEAutenrieth Matthew EarlVest 36K shMay 1, 2026

InsiderHEHollek Darrell ESell $494KMar 31, 2026

Activist

The Vanguard Group0.0%Mar 27, 2026

InsiderTBTAYLOR CINDY BSell $100KDec 16, 2025

Activist

BlackRock, Inc.7.4%Apr 24, 2025

Activist

Dimensional Fund Advisors LP5.1%Apr 15, 2025

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Decreased	6.3M(-5.2%)	$73.4M	0.0%	+68.92%	0
DIMENSIONAL FUND ADVISORS LP	Increased	3.5M(+2.6%)	$41M	0.0%	+8.85%	30
VAVANGUARD CAPITAL MANAGEMENT LLC	New	2.4M	$28.1M	0.0%	-32.88%	40
DED. E. Shaw & Co., Inc.	Decreased	2.2M(-18.2%)	$25.2M	0.0%	+67.42%	0
First Eagle Investment Management, LLC	Decreased	2M(-20.8%)	$23.8M	0.0%	+51.47%	0
AMERICAN CENTURY COMPANIES INC	Increased	1.8M(+14.4%)	$21.5M	0.0%	+18.16%	32
AQR CAPITAL MANAGEMENT LLC	Increased	1.8M(+2.5%)	$21.2M	0.0%	+41.67%	29
STATE STREET CORP	Increased	1.7M(+19.6%)	$20.2M	0.0%	+10.16%	34
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	1.6M	$19.1M	0.0%	-32.88%	39
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.4M(+2.7%)	$15.8M	0.0%	-16.17%	29
MORGAN STANLEY	Increased	1.4M(+37.5%)	$15.7M	0.0%	+21.56%	37
DRIEHAUS CAPITAL MANAGEMENT LLC	New	1.3M	$15.5M	0.1%	-32.88%	47
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	1.1M(-1.3%)	$13.2M	0.0%	+20.67%	0
TWO SIGMA INVESTMENTS, LP	Increased	1.1M(+79.6%)	$12.5M	0.0%	-6.99%	43
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	Decreased	1M(-41.3%)	$11.7M	0.0%	+63.73%	0
MWMARSHALL WACE, LLP	New	932,772	$10.9M	0.0%	-32.88%	38
UBS Group AG	Increased	853,474(+67.4%)	$9.9M	0.0%	-3.81%	41
JPMORGAN CHASE & CO	Decreased	821,868(-24.4%)	$9.5M	0.0%	+59.21%	0
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	Increased	721,401(+69.5%)	$8.4M	0.0%	-6.24%	41
MILLENNIUM MANAGEMENT LLC	Increased	704,411(+5587.1%)	$8.2M	0.0%	-32.21%	44