13F Insight
DOSSIER · 13F Holders · Q1 2026Inflation hedgeYield
ASPI

Asp Isotopes Inc

192 institutions still hold Asp Isotopes Inc as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 00218a105·192 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 3.7%
vs prior quarter
13F value held
$253M
51.0% inst. owned
of float
Holders
192
+20 QoQ
filers reporting
Activity
+49 / −6
+933 added · −927 reduced
this quarter
Concentration
14.54%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

192 institutions reported ASPI in Q1 2026. BlackRock, Inc. leads at 14.5% of the visible book. +20 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$37M8.3M0.00%Q1 202602
Alyeska Investment Group, L.P.
CIK 0001453072
$26M4.9M0.07%Q4 202503
CITADEL ADVISORS LLC
CIK 0001423053
$24M4.6M0.00%Q4 202504
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$24M5.3M0.00%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$22M5.1M0.00%Q1 202606
Rovida Investment Management Ltd
CIK 0002053064
$18M4.1M2.27%Q1 202607
UBS Group AG
CIK 0001610520
$13M3.0M0.00%Q1 202608
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$12M2.7M0.00%Q1 202609
STATE STREET CORP
CIK 0000093751
$10M2.3M0.00%Q1 202610
EXCHANGE TRADED CONCEPTS, LLC
CIK 0001457320
$10M2.2M0.07%Q1 202611
AWM Investment Company, Inc.
CIK 0001535264
$9M2.1M1.04%Q1 202612
PEAK6 LLC
CIK 0001389958
$8M1.8M0.02%Q1 202613
MORGAN STANLEY
CIK 0000895421
$7M1.6M0.00%Q1 202614
WOLVERINE TRADING, LLC
CIK 0000927337
$6M612K0.00%Q3 202515
BARCLAYS PLC
CIK 0000312069
$4M1.0M0.00%Q1 202616
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$4M1.0M0.00%Q1 202617
MARSHALL WACE, LLP
CIK 0001318757
$4M818K0.00%Q4 202518
Vanguard Portfolio Management
CIK 0002100121
$4M977K0.00%Q1 202619
Diametric Capital, LP
CIK 0001719087
$4M954K1.10%Q1 202620
NORTHERN TRUST CORP
CIK 0000073124· Index
$4M938K0.00%Q1 2026
Page 1 of 10
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