DOSSIER · 13F Holders · Q1 2026CyclicalNet sold
AP

AMPCO-PITTSBURG CORP

66 institutions still hold AMPCO-PITTSBURG CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 032037103·66 13F holders·last filed Mar 31, 2026
Market cap
8.8%
vs prior quarter
13F value held
$64M
49.0% inst. owned
of float
Holders
66
-2 QoQ
filers reporting
Activity
+44 / −47
+844 added · −747 reduced
this quarter
Concentration
26.32%
GAMCO INVESTORS, INC. ET AL #1
top holder share
AI Holders Summary · Q1 2026

66 institutions reported AP in Q1 2026. GAMCO INVESTORS, INC. ET AL leads at 26.3% of the visible book. -2 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
GAMCO INVESTORS, INC. ET AL
CIK 0000807249
$17M2.5M0.16%Q1 2026
02
GABELLI FUNDS LLC
CIK 0001081407
$9M1.4M0.06%Q1 2026
03
AMERIPRISE FINANCIAL INC
CIK 0000820027
$8M1.2M0.00%Q1 2026
04
WELLS FARGO & COMPANY/MN
CIK 0000072971
$4M656K0.00%Q1 2026
05
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$4M600K0.00%Q1 2026
06
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$3M423K0.00%Q1 2026
07
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$2M355K0.00%Q1 2026
08
Ancora Advisors LLC
CIK 0001446114
$2M354K0.04%Q4 2025
09
Huntleigh Advisors, Inc.
CIK 0001367653
$2M230K0.26%Q1 2026
10
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$1M219K0.00%Q1 2026
11
Meros Investment Management, LP
CIK 0001911372
$1M215K0.63%Q1 2026
12
BlackRock, Inc.
CIK 0002012383
$1M203K0.00%Q1 2026
13
SEI INVESTMENTS CO
CIK 0000350894
$1M184K0.00%Q1 2026
14
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$1M168K0.00%Q1 2026
15
MARSHALL WACE, LLP
CIK 0001318757
$1M208K0.00%Q4 2025
16
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$1M160K0.00%Q1 2026
17
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$1M154K0.02%Q1 2026
18
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$908,530135K0.00%Q1 2026
19
Teton Advisors, LLC
CIK 0002086025
$873,600130K0.61%Q1 2026
20
O'SHAUGHNESSY ASSET MANAGEMENT, LLC
CIK 0001423442
$822,649122K0.00%Q1 2026
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