Company · Ownership research

AMPCO PITTSBURGH CORP AP

CIK 0000006176 · CUSIP 032037103

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 032037103 (AP), not CUSIP 032037903 (AP), CUSIP 032037953 (AP), and does not merge CUSIPs.

This page lists the top 20 of 40 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GAMCO INVESTORS, INC. ET AL CIK 807249 · View history	$7.24M 2,447,535 shares	0.07%	+19.92K(+0.80%)Added	SEC filing ↗ Aug 13, 2025	▾
02	GABELLI FUNDS LLC CIK 1081407 · View history	$4.05M 1,367,800 shares	0.03%	-40.00K(-2.80%)Reduced	SEC filing ↗ Aug 13, 2025	▾
03	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$3.43M 1,159,681 shares	0.00%	+33.95K(+3.00%)Added	SEC filing ↗ Aug 14, 2025	▾
04	Ancora Advisors LLC CIK 1446114 · View history	$3.16M 1,068,531 shares	0.07%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$1.86M 629,683 shares	0.00%	+5.25K(+0.80%)Added	SEC filing ↗ Aug 11, 2025	▾
06	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$1.33M 448,790 shares	0.00%	+16.07K(+3.70%)Added	SEC filing ↗ Aug 13, 2025	▾
07	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$1.00M 337,844 shares	0.00%	+27.31K(+8.80%)Added	SEC filing ↗ Aug 12, 2025	▾
08	BlackRock, Inc. CIK 2012383 · View history	$489.35K 165,319 shares	0.00%	+222(+0.10%)Added	SEC filing ↗ Aug 12, 2025	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$479.83K 162,066 shares	0.00%	+4.34K(+2.80%)Added	SEC filing ↗ Aug 8, 2025	▾
10	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$377.50K 127,535 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
11	Teton Advisors, Inc. CIK 1444874 · View history	$331.52K 112,000 shares	0.20%	0(0.00%)Unchanged	SEC filing ↗ Aug 13, 2025	▾
12	RBF Capital, LLC CIK 1134621 · View history	$269.21K 90,950 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
13	STATE STREET CORP CIK 93751 · View history	$219.68K 74,216 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
14	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$166.00K 56,991 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Aug 7, 2025	▾
15	UBS Group AG CIK 1610520 · View history	$121.34K 40,992 shares	0.00%	+16.66K(+68.50%)Added	SEC filing ↗ Aug 14, 2025	▾
16	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$104.00K 35,048 shares	0.01%	+20.88K(+147.30%)Added	SEC filing ↗ Jul 22, 2025	▾
17	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$82.31K 27,807 shares	0.00%	+16.34K(+142.50%)Added	SEC filing ↗ Aug 14, 2025	▾
18	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$80.47K 27,186 shares	0.00%	+27.19KNew	SEC filing ↗ Aug 14, 2025	▾
19	HUNTER ASSOCIATES INVESTMENT MANAGEMENT LLC CIK 1380137 · View history	$74.00K 25,000 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Aug 5, 2025	▾
20	Central Pacific Bank - Trust Division CIK 2020066 · View history	$66.31K 22,401 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Jul 2, 2025	▾

Showing 20 / 40 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

8,557,660

Not deduplicated across managers

Disclosed value

$25.33M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

AMPCO PITTSBURGH CORP · Q2 2025

Explore all 40 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.