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 85 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	$21.28M 2,459,829 shares	0.19%	-32.13K(-1.30%)Reduced	SEC filing ↗ Aug 12, 2026	▾
02	GABELLI FUNDS LLC CIK 1081407 · View history	$12.04M 1,391,800 shares	0.08%	-8.00K(-0.60%)Reduced	SEC filing ↗ Aug 12, 2026	▾
03	BlackRock, Inc. CIK 2012383 · View history	$8.50M 982,611 shares	0.00%	+779.48K(+383.70%)Added	SEC filing ↗ Aug 7, 2026	▾
04	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$7.83M 905,679 shares	0.00%	-267.35K(-22.80%)Reduced	SEC filing ↗ Aug 14, 2026	▾
05	WELLS FARGO & COMPANY/MN CIK 72971 · View history	$5.72M 660,945 shares	0.00%	+4.94K(+0.80%)Added	SEC filing ↗ Aug 14, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$5.23M 604,091 shares	0.00%	+3.98K(+0.70%)Added	SEC filing ↗ Aug 13, 2026	▾
07	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$3.58M 414,419 shares	0.00%	-8.80K(-2.10%)Reduced	SEC filing ↗ Aug 13, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.97M 342,836 shares	0.00%	+207.77K(+153.80%)Added	SEC filing ↗ Aug 12, 2026	▾
09	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$2.84M 328,848 shares	0.00%	+109.99K(+50.30%)Added	SEC filing ↗ Aug 12, 2026	▾
10	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$2.56M 295,444 shares	0.00%	-59.98K(-16.90%)Reduced	SEC filing ↗ Aug 11, 2026	▾
11	Meros Investment Management, LP CIK 1911372 · View history	$2.08M 239,910 shares	0.66%	+25.06K(+11.70%)Added	SEC filing ↗ Aug 14, 2026	▾
12	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$1.69M 195,321 shares	0.00%	+168.72K(+634.30%)Added	SEC filing ↗ Aug 14, 2026	▾
13	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$1.65M 191,015 shares	0.00%	+107.42K(+128.50%)Added	SEC filing ↗ Aug 13, 2026	▾
14	O'SHAUGHNESSY ASSET MANAGEMENT, LLC CIK 1423442 · View history	$1.51M 174,312 shares	0.01%	+51.89K(+42.40%)Added	SEC filing ↗ Aug 13, 2026	▾
15	STATE STREET CORP CIK 93751 · Amended · View history	$1.38M 159,316 shares	0.00%	+99.90K(+168.10%)Added	SEC filing ↗ Sep 22, 2026	▾
16	JANE STREET GROUP, LLC CIK 1595888 · View history	$1.30M 150,371 shares	0.00%	-17.93K(-10.70%)Reduced	SEC filing ↗ Aug 14, 2026	▾
17	Huntleigh Advisors, Inc. CIK 1367653 · View history	$1.22M 141,172 shares	0.17%	-89.31K(-38.70%)Reduced	SEC filing ↗ Aug 4, 2026	▾
18	RITHOLTZ WEALTH MANAGEMENT CIK 1698218 · Amended · View history	$1.15M 132,943 shares	0.02%	+14.16K(+11.90%)Added	SEC filing ↗ Aug 10, 2026	▾
19	Teton Advisors, LLC CIK 2086025 · View history	$1.12M 130,000 shares	0.65%	0(0.00%)Unchanged	SEC filing ↗ Aug 12, 2026	▾
20	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$1.08M 125,386 shares	0.02%	-29.02K(-18.80%)Reduced	SEC filing ↗ Aug 14, 2026	▾

Showing 20 / 85 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

11,498,094

Not deduplicated across managers

Disclosed value

$99.46M

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 2026

Explore all 85 reporting institutions.

This page includes 20 of 85 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.