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 43 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	$13.17M 2,470,828 shares	0.13%	+86.62K(+3.60%)Added	SEC filing ↗ Feb 5, 2026	▾
02	GABELLI FUNDS LLC CIK 1081407 · View history	$7.48M 1,404,300 shares	0.05%	+23.50K(+1.70%)Added	SEC filing ↗ Feb 5, 2026	▾
03	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$6.20M 1,162,445 shares	0.00%	+10.78K(+0.90%)Added	SEC filing ↗ Feb 17, 2026	▾
04	VANGUARD GROUP INC CIK 102909 · View history	$3.49M 654,635 shares	0.00%	-13.07K(-2.00%)Reduced	SEC filing ↗ Jan 29, 2026	▾
05	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$2.46M 461,302 shares	0.00%	-19.32K(-4.00%)Reduced	SEC filing ↗ Feb 12, 2026	▾
06	Ancora Advisors LLC CIK 1446114 · View history	$1.89M 354,100 shares	0.04%	-597.22K(-62.80%)Reduced	SEC filing ↗ Feb 17, 2026	▾
07	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$1.79M 334,973 shares	0.00%	-1.15K(-0.30%)Reduced	SEC filing ↗ Feb 12, 2026	▾
08	MARSHALL WACE, LLP CIK 1318757 · View history	$1.11M 208,342 shares	0.00%	+208.34KNew	SEC filing ↗ Feb 13, 2026	▾
09	BlackRock, Inc. CIK 2012383 · View history	$892.82K 167,509 shares	0.00%	-1.73K(-1.00%)Reduced	SEC filing ↗ Feb 12, 2026	▾
10	Informed Momentum Co LLC CIK 1510989 · View history	$790.95K 148,395 shares	0.09%	+148.40KNew	SEC filing ↗ Feb 12, 2026	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$757.60K 142,099 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Feb 9, 2026	▾
12	Teton Advisors, LLC CIK 2086025 · View history	$692.90K 130,000 shares	0.48%	+21.50K(+19.80%)Added	SEC filing ↗ Feb 5, 2026	▾
13	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$573.16K 107,535 shares	0.01%	-20.00K(-15.70%)Reduced	SEC filing ↗ Feb 17, 2026	▾
14	SEI INVESTMENTS CO CIK 350894 · View history	$481.48K 90,334 shares	0.00%	+90.33KNew	SEC filing ↗ Feb 13, 2026	▾
15	STATE STREET CORP CIK 93751 · View history	$427.02K 80,116 shares	0.00%	+5.90K(+7.90%)Added	SEC filing ↗ Feb 13, 2026	▾
16	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$348.00K 65,515 shares	0.00%	+8.52K(+15.00%)Added	SEC filing ↗ Feb 10, 2026	▾
17	RBF Capital, LLC CIK 1134621 · Amended · View history	$319.80K 60,000 shares	0.01%	-30.95K(-34.00%)Reduced	SEC filing ↗ Feb 17, 2026	▾
18	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$221.54K 41,564 shares	0.00%	+41.56KNew	SEC filing ↗ Feb 17, 2026	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$151.47K 28,419 shares	0.00%	+7.42K(+35.30%)Added	SEC filing ↗ Feb 17, 2026	▾
20	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$150.58K 28,251 shares	0.00%	-3.60K(-11.30%)Reduced	SEC filing ↗ Mar 25, 2026	▾

Showing 20 / 43 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

8,318,227

Not deduplicated across managers

Disclosed value

$44.33M

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 · Q4 2025

Explore all 43 reporting institutions.

This page includes 20 of 43 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.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 43 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"032037103","quarter":"2025Q4","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.