13F Insight
DOSSIER · 13F Holders · Q1 2026Financial Services · Real Estate Investment TrustsDefensive growthQuality
AIV

APARTMENT INVT & MGMT CO

196 institutions still hold APARTMENT INVT & MGMT CO as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 03748R747·Real Estate Investment Trusts·196 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 3.1%
vs prior quarter
13F value held
$308M
77.0% inst. owned
of float
Holders
196
+41 QoQ
filers reporting
Activity
+8 / −32
+867 added · −724 reduced
this quarter
Concentration
16.33%
Madison Avenue Partners, LP #1
top holder share
AI Holders Summary · Q1 2026

196 institutions reported AIV in Q1 2026. Madison Avenue Partners, LP leads at 16.3% of the visible book. +41 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Madison Avenue Partners, LP
CIK 0001801265
$50M12.4M2.19%Q1 202602
Newtyn Management, LLC
CIK 0001569241
$50M12.2M5.31%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$35M8.6M0.00%Q1 202604
Weiss Asset Management LP
CIK 0001357550
$33M8.2M0.56%Q1 202605
Irenic Capital Management LP
CIK 0001929389
$20M5.0M1.33%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$19M4.7M0.00%Q1 202607
Owl Creek Asset Management, L.P.
CIK 0001313756
$12M3.0M0.89%Q1 202608
BlackRock, Inc.
CIK 0002012383
$12M2.9M0.00%Q1 202609
LANDMARK INVESTMENT PARTNERS, L.P.
CIK 0002023551
$10M2.6M7.47%Q1 202610
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$9M2.1M0.00%Q1 202611
SummitTX Capital, L.P.
CIK 0002052310
$8M2.0M0.26%Q1 202612
Qube Research & Technologies Ltd
CIK 0001729829
$7M1.8M0.01%Q1 202613
Verition Fund Management LLC
CIK 0001454027
$7M1.7M0.04%Q1 202614
Western Standard LLC
CIK 0001517666
$7M1.6M3.48%Q1 202615
HRT FINANCIAL LP
CIK 0001475597
$6M1.0M0.02%Q4 202516
CITADEL ADVISORS LLC
CIK 0001423053
$6M1.0M0.00%Q4 202517
Union Square Park Capital Management, LLC
CIK 0001666231
$5M1.1M2.60%Q1 202618
DLD Asset Management, LP
CIK 0001578299
$4M1.1M0.40%Q1 202619
Meros Investment Management, LP
CIK 0001911372
$4M968K1.71%Q1 202620
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$4M931K0.00%Q1 2026
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