DOSSIER · 13F Holders · Q2 2026

INVESTMENT MANAGERS SER TR I

8 institutions still hold INVESTMENT MANAGERS SER TR I as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 46144X487·8 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$5M
visible holders
Holders
8
filers reporting
Concentration
76.39%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q2 2026

8 institutions reported INVESTMENT MANAGERS SER TR I in Q2 2026. Optiver Holding B.V. leads at 76.4% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$4M77K0.00%Q2 2026
02
CITADEL ADVISORS LLC
CIK 0001423053
$524K11K0.00%Q4 2025
03
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$396K8K0.00%Q2 2026
04
THURSTON, SPRINGER, MILLER, HERD & TITAK, INC.
CIK 0000319933
$204K4K0.03%Q2 2025
05
SIMPLEX TRADING, LLC
CIK 0001488542
$8K1710.00%Q2 2026
06
UBS Group AG
CIK 0001610520
$6K1270.00%Q2 2026
07
Qube Research & Technologies Ltd
CIK 0001729829
$3K660.00%Q2 2026
08
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025