DOSSIER · 13F Holders · Q1 2026
ICU

SEASTAR MEDICAL HOLDING CORP COM NEW

16 institutions still hold SEASTAR MEDICAL HOLDING CORP COM NEW as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 81256L302·16 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$483K
visible holders
Holders
16
filers reporting
Concentration
42.86%
GEODE CAPITAL MANAGEMENT, LLC #1
top holder share
AI Holders Summary · Q1 2026

SeaStar Medical (ICU) has a negligible institutional base — 16 filers and about $483K in combined 13F value as of Q1 2026. The top holders are all passive or trading shops: Geode ($207K), Vanguard ($107K) and Jane Street ($104K). No fundamental manager is present, marking ICU as a pre-institutional micro-cap.

The top of the register is entirely passive and market-making: Geode Capital ($207K) and Vanguard ($107K) are index-driven, while Jane Street ($104K) is a market-maker providing liquidity. None of the three is a fundamental investor building a thesis on the company.

For ICU readers, the honest read is that institutional conviction has not arrived: the entire book is index exposure plus market-making, with no active manager and trivial absolute dollars. The 13F record here reflects benchmark inclusion and trading activity rather than professional interest in the device story.

Top holders

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

#HolderValueShares% port.Quarter
01
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$207K56K0.00%Q1 2026
02
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$107K29K0.00%Q1 2026
03
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$104K28K0.00%Q1 2026
04
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$51K14K0.00%Q1 2026
05
Tower Research Capital LLC (TRC)
CIK 0001533421
$5K1K0.00%Q1 2026
06
BlackRock, Inc.
CIK 0002012383
$3K9130.00%Q1 2026
07
UBS Group AG
CIK 0001610520
$3K7930.00%Q1 2026
08
OSAIC HOLDINGS, INC.
CIK 0001677044
$8542300.00%Q1 2026
09
NewEdge Advisors, LLC
CIK 0001633516
$6551760.00%Q1 2026
10
Vanguard Global Advisers, LLC
CIK 0001811242· Index
$6141650.00%Q1 2026
11
TD Waterhouse Canada Inc.
CIK 0001999606
$78220.00%Q1 2026
12
MORGAN STANLEY
CIK 0000895421
$74200.00%Q1 2026
13
SBI Securities Co., Ltd.
CIK 0001851815
$51140.00%Q2 2026
14
SOA Wealth Advisors, LLC.
CIK 0001849444
$2260.00%Q2 2026
15
HighMark Wealth Management LLC
CIK 0001802451
$720.00%Q1 2026
16
CWM, LLC
CIK 0001535847
$410.00%Q1 2026
Insiders at SEASTAR MEDICAL HOLDING CORP COM NEW
Baird Jennifer AVan Heel KennethNeuman JohnMessinger MichaelChung KevinVincent Bernadette NSchlorff EricGreen David A