13F Insight
DOSSIER · 13F Holders · Q1 2026Consumer Defensive · Grain Mill ProductsInflation hedgeYield
POST

POST HLDGS INC

445 institutions still hold POST HLDGS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 737446104·Grain Mill Products·445 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 1.2%
vs prior quarter
13F value held
$3.1B
66.0% inst. owned
of float
Holders
445
+104 QoQ
filers reporting
Activity
+93 / −37
+837 added · −859 reduced
this quarter
Concentration
12.61%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

445 institutions reported POST in Q1 2026. BlackRock, Inc. leads at 12.6% of the visible book. +104 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
$393M4.0M0.01%Q1 202602
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$304M3.1M0.06%Q1 202603
Route One Investment Company, L.P.
CIK 0001512171
$292M3.0M12.42%Q1 202604
JPMORGAN CHASE & CO
CIK 0000019617
$259M2.7M0.02%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$240M2.4M0.01%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$185M1.9M0.00%Q1 202607
Holocene Advisors, LP
CIK 0001700574
$175M1.8M0.42%Q1 202608
LONDON CO OF VIRGINIA
CIK 0001259887
$146M1.5M0.90%Q1 202609
STATE STREET CORP
CIK 0000093751
$141M1.4M0.00%Q1 202610
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$138M1.4M0.11%Q1 202611
MANUFACTURERS LIFE INSURANCE COMPANY, THE
CIK 0000928047
$125M1.3M0.11%Q1 202612
Clarkston Capital Partners, LLC
CIK 0001562855
$118M1.2M9.00%Q1 202613
UBS Group AG
CIK 0001610520
$103M1.0M0.02%Q1 202614
FMR LLC
CIK 0000315066
$82M831K0.00%Q1 202615
DIAMOND HILL CAPITAL MANAGEMENT INC
CIK 0001217541
$81M816K0.50%Q1 202616
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$80M807K0.01%Q1 202617
MORGAN STANLEY
CIK 0000895421
$79M795K0.00%Q1 202618
TWO SIGMA ADVISERS, LP
CIK 0001478735
$78M786K0.15%Q4 202519
Invesco Ltd.
CIK 0000914208
$55M560K0.01%Q1 202620
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$46M466K0.01%Q1 2026
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