13F Insight
DOSSIER · 13F Holders · Q3 2025

STONEBRIDGE ACQUISITION II C

11 institutions still hold STONEBRIDGE ACQUISITION II C as of Q3 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G85096124·11 13F holders·last filed Sep 30, 2025
Market cap
—
13F value held
$6M
visible holders
Holders
11
filers reporting
Concentration
22.08%
ATW SPAC MANAGEMENT LLC #1
top holder share
AI Holders Summary · Q3 2025

11 institutions reported STONEBRIDGE ACQUISITION II C in Q3 2025. ATW SPAC MANAGEMENT LLC leads at 22.1% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
ATW SPAC MANAGEMENT LLC
CIK 0001878495
$1M138K1.74%Q3 202502
TORONTO DOMINION BANK
CIK 0000947263
$1M121K0.00%Q2 202603
MASO CAPITAL PARTNERS Ltd
CIK 0001698093
$747K75K1.23%Q3 202504
Yakira Capital Management, Inc.
CIK 0001584639
$661K64K0.19%Q2 202605
Quarry LP
CIK 0001965207
$623K60K0.05%Q2 202606
Sandia Investment Management LP
CIK 0001880562
$602K60K1.50%Q4 202507
Lineage Point Capital LP
CIK 0002093311
$400K40K0.15%Q4 202508
Clear Street Group Inc.
CIK 0001881567
$275K27K0.00%Q2 202609
CITADEL ADVISORS LLC
CIK 0001423053
$144K14K0.00%Q4 202510
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$123K12K0.00%Q2 202611
UBS Group AG
CIK 0001610520
$540520.00%Q2 2026