13F Insight
DOSSIER · 13F Holders · Q1 2026Defensive growthQuality
OIS

OIL STS INTL INC

217 institutions still hold OIL STS INTL INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 678026105·217 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 7.1%
vs prior quarter
13F value held
$401M
59.0% inst. owned
of float
Holders
217
-4 QoQ
filers reporting
Activity
+42 / −55
+979 added · −908 reduced
this quarter
Concentration
18.33%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

217 institutions reported OIS in Q1 2026. BlackRock, Inc. leads at 18.3% of the visible book. -4 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$73M6.3M0.00%Q1 202602
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$41M3.5M0.01%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$28M2.4M0.00%Q1 202604
First Eagle Investment Management, LLC
CIK 0001325447
$24M2.0M0.04%Q1 202605
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$22M1.8M0.01%Q1 202606
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$21M1.8M0.01%Q1 202607
STATE STREET CORP
CIK 0000093751
$20M1.7M0.00%Q1 202608
Vanguard Portfolio Management
CIK 0002100121
$19M1.6M0.00%Q1 202609
D. E. Shaw & Co., Inc.
CIK 0001009207
$18M2.6M0.01%Q4 202510
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$16M1.4M0.00%Q1 202611
MORGAN STANLEY
CIK 0000895421
$16M1.4M0.00%Q1 202612
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 0000938206
$15M1.3M0.11%Q1 202613
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$13M1.1M0.00%Q1 202614
KENNEDY CAPITAL MANAGEMENT LLC
CIK 0000884589
$13M1.1M0.27%Q1 202615
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$12M1.1M0.01%Q1 202616
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
CIK 0001164833
$12M1.0M0.04%Q1 202617
UBS Group AG
CIK 0001610520
$10M853K0.00%Q1 202618
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$10M833K0.20%Q1 202619
JPMORGAN CHASE & CO
CIK 0000019617
$10M822K0.00%Q1 202620
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$8M721K0.00%Q1 2026
Page 1 of 11
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