13F Insight
DOSSIER · 13F Holders · Q1 2026CyclicalNet sold
HDSN

HUDSON TECHNOLOGIES INC

167 institutions still hold HUDSON TECHNOLOGIES INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 444144109·167 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 0.2%
vs prior quarter
13F value held
$149M
62.0% inst. owned
of float
Holders
167
-61 QoQ
filers reporting
Activity
+50 / −90
+806 added · −776 reduced
this quarter
Concentration
14.99%
Hartree Partners, LP #1
top holder share
AI Holders Summary · Q1 2026

167 institutions reported HDSN in Q1 2026. Hartree Partners, LP leads at 15.0% of the visible book. -61 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Hartree Partners, LP
CIK 0001597857
$22M3.8M4.79%Q1 202602
WESTERLY CAPITAL MANAGEMENT, LLC
CIK 0001546172
$19M3.2M5.08%Q1 202603
BlackRock, Inc.
CIK 0002012383
$17M2.9M0.00%Q1 202604
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$13M2.1M0.00%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$10M1.7M0.00%Q1 202606
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$9M1.5M0.01%Q1 202607
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$9M1.5M0.00%Q1 202608
NEW SOUTH CAPITAL MANAGEMENT INC
CIK 0001044797
$7M1.2M0.35%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$6M949K0.00%Q1 202610
STATE STREET CORP
CIK 0000093751
$5M898K0.00%Q1 202611
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$5M881K0.00%Q1 202612
CASPIAN CAPITAL LP
CIK 0001518999
$4M728K4.17%Q1 202613
D. E. Shaw & Co., Inc.
CIK 0001009207
$4M583K0.00%Q4 202514
SEGALL BRYANT & HAMILL, LLC
CIK 0001006378
$4M628K0.05%Q1 202615
MARSHALL WACE, LLP
CIK 0001318757
$3M465K0.00%Q4 202516
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$3M498K0.06%Q1 202617
MORGAN STANLEY
CIK 0000895421
$3M472K0.00%Q1 202618
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO
CIK 0001007280
$2M410K0.01%Q1 202619
NORTHERN TRUST CORP
CIK 0000073124· Index
$2M399K0.00%Q1 202620
683 Capital Management, LLC
CIK 0001404574
$2M335K0.10%Q4 2025
Page 1 of 9
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