Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

AMPCO PITTSBURGH CORP

CIK 0000006176AP· quarter ending 2026-06-30

Shares outstanding

20,658,621

as of 2026-08-06 · 10-Q cover page, filed 2026-08-11

Held by 13F filers

11,513,094

55.7% of shares outstanding

Holders

+22 vs 2026-03-31 · 31 new, 9 exited

Value

$99.6M

shares +12.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-11, as of 2026-08-06)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	AP · NYSE	20,658,621	11,513,094	55.7%	85	032037103

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	032037103	COM	85	11,513,094	20,658,621	55.7%	$99.6M	4 call / 1 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 1 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (85 of 85 · 032037103)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	GAMCO INVESTORS, INC. ET AL	2,459,829	11.91%	$21.3M	-32,128 (-1.3%)
2	GABELLI FUNDS LLC	1,391,800	6.74%	$12.0M	-8,000 (-0.6%)
3	BlackRock, Inc.	982,611	4.76%	$8.5M	+779,478 (+383.7%)
4	AMERIPRISE FINANCIAL INC	905,679	4.38%	$7.8M	-267,345 (-22.8%)
5	WELLS FARGO & COMPANY/MN	660,945	3.20%	$5.7M	+4,944 (+0.8%)
6	VANGUARD CAPITAL MANAGEMENT LLC	604,091	2.92%	$5.2M	+3,977 (+0.7%)
7	RENAISSANCE TECHNOLOGIES LLC	414,419	2.01%	$3.6M	-8,800 (-2.1%)
8	GEODE CAPITAL MANAGEMENT, LLC	342,836	1.66%	$3.0M	+207,773 (+153.8%)
9	AMERICAN CENTURY COMPANIES INC	328,848	1.59%	$2.8M	+109,988 (+50.3%)
10	DIMENSIONAL FUND ADVISORS LP	295,444	1.43%	$2.6M	-59,983 (-16.9%)
11	Meros Investment Management, LP	239,910	1.16%	$2.1M	+25,060 (+11.7%)
12	SUSQUEHANNA INTERNATIONAL GROUP, LLP	195,321	0.95%	$1.7M	+168,722 (+634.3%)
13	ACADIAN ASSET MANAGEMENT LLC	191,015	0.92%	$1.6M	+107,423 (+128.5%)
14	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	174,312	0.84%	$1.5M	+51,894 (+42.4%)
15	STATE STREET CORP	159,316	0.77%	$1.4M	+99,900 (+168.1%)
16	JANE STREET GROUP, LLC	150,371	0.73%	$1.3M	-17,930 (-10.7%)
17	Huntleigh Advisors, Inc.	141,172	0.68%	$1.2M	-89,306 (-38.7%)
18	RITHOLTZ WEALTH MANAGEMENT	132,943	0.64%	$1.1M	+14,164 (+11.9%)
19	Teton Advisors, LLC	130,000	0.63%	$1.1M	—
20	BRIDGEWAY CAPITAL MANAGEMENT, LLC	125,386	0.61%	$1.1M	-29,024 (-18.8%)
21	NORTHERN TRUST CORP	121,477	0.59%	$1.1M	+93,058 (+327.4%)
22	VANGUARD PORTFOLIO MANAGEMENT LLC	112,721	0.55%	$975K	NEW
23	GOLDMAN SACHS GROUP INC	100,724	0.49%	$871K	+59,994 (+147.3%)
24	VANGUARD FIDUCIARY TRUST CO	92,875	0.45%	$803K	+20,062 (+27.6%)
25	Informed Momentum Co LLC	90,053	0.44%	$779K	-25,740 (-22.2%)
26	MARSHALL WACE, LLP	80,361	0.39%	$695K	-80,930 (-50.2%)
27	Palumbo Wealth Management LLC	79,185	0.38%	$685K	+63,952 (+419.8%)
28	SEI INVESTMENTS CO	65,911	0.32%	$570K	-118,425 (-64.2%)
29	PANAGORA ASSET MANAGEMENT INC	52,441	0.25%	$454K	NEW
30	CITADEL ADVISORS LLC	51,409	0.25%	$445K	+36,970 (+256.0%)
31	Empowered Funds, LLC	50,286	0.24%	$435K	+3,411 (+7.3%)
32	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	39,373	0.19%	$341K	NEW
33	Bank of New York Mellon Corp	33,984	0.16%	$294K	NEW
34	Qube Research & Technologies Ltd	32,230	0.16%	$279K	NEW
35	UBS Group AG	32,154	0.16%	$278K	-11,567 (-26.5%)
36	Dynamic Technology Lab Private Ltd	30,373	0.15%	$263K	NEW
37	RAFFLES ASSOCIATES LP	30,000	0.15%	$260K	+15,000 (+100.0%)
38	OCCUDO QUANTITATIVE STRATEGIES LP	24,936	0.12%	$216K	NEW
39	XTX Topco Ltd	23,995	0.12%	$208K	-24,587 (-50.6%)
40	Central Pacific Bank - Trust Division	22,401	0.11%	$194K	—
41	GSA CAPITAL PARTNERS LLP	21,641	0.10%	$187K	+2,984 (+16.0%)
42	Nuveen, LLC	21,419	0.10%	$185K	NEW
43	MILLENNIUM MANAGEMENT LLC	19,793	0.10%	$171K	-140,615 (-87.7%)
44	Janney Montgomery Scott LLC	17,516	0.08%	$152K	—
45	Brevan Howard Capital Management LP	16,388	0.08%	$142K	-2,339 (-12.5%)
46	DEUTSCHE BANK AG\	16,137	0.08%	$140K	NEW
47	Graham Capital Management, L.P.	14,835	0.07%	$128K	NEW
48	STRS OHIO	14,000	0.07%	$121K	NEW
49	BANK OF AMERICA CORP /DE/	13,954	0.07%	$121K	-6,326 (-31.2%)
50	RHUMBLINE ADVISERS	13,659	0.07%	$118K	NEW
51	MORGAN STANLEY	13,560	0.07%	$117K	+3,979 (+41.5%)
52	PRICE T ROWE ASSOCIATES INC /MD/	13,488	0.07%	$117K	NEW
53	IMC-Chicago, LLC	13,316	0.06%	$115K	NEW
54	Engineers Gate Manager LP	12,307	0.06%	$106K	NEW
55	ALGERT GLOBAL LLC	11,642	0.06%	$101K	-17,290 (-59.8%)
56	Hodges Capital Management Inc.	11,185	0.05%	$97K	+275 (+2.5%)
57	MetLife Investment Management, LLC	9,895	0.05%	$86K	NEW
58	CITIGROUP INC	9,134	0.04%	$79K	+7,620 (+503.3%)
59	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	7,463	0.04%	$65K	NEW
60	JPMORGAN CHASE & CO	7,250	0.04%	$64K	NEW
61	GROUP ONE TRADING LLC	7,005	0.03%	$61K	+343 (+5.1%)
62	PNC Financial Services Group, Inc.	6,600	0.03%	$57K	—
63	Police & Firemen's Retirement System of New Jersey	4,780	0.02%	$41K	NEW
64	Vanguard Global Advisers, LLC	3,678	0.02%	$32K	-3,741 (-50.4%)
65	BARCLAYS PLC	3,341	0.02%	$29K	+3,081 (+1185.0%)
66	NEW YORK STATE COMMON RETIREMENT FUND	2,900	0.01%	$25K	NEW
67	BNP PARIBAS FINANCIAL MARKETS	2,813	0.01%	$24K	NEW
68	Legal & General Group Plc	1,581	0.01%	$14K	NEW
69	Ameritas Investment Partners, Inc.	1,471	0.01%	$13K	NEW
70	Russell Investments Group, Ltd.	1,296	0.01%	$11K	NEW
71	Tower Research Capital LLC (TRC)	1,137	0.01%	$10K	+996 (+706.4%)
72	JONES FINANCIAL COMPANIES LLLP	967	0.00%	$9K	+1 (+0.1%)
73	ROYAL BANK OF CANADA	707	0.00%	$6K	-263 (-27.1%)
74	FMR LLC	700	0.00%	$6K	NEW
75	Farther Finance Advisors, LLC	600	0.00%	$5K	—
76	Markowski Investments	500	0.00%	$4K	NEW
77	FEDERATED HERMES, INC.	367	0.00%	$3K	NEW
78	OSAIC HOLDINGS, INC.	360	0.00%	$3K	—
79	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	223	0.00%	$2K	NEW
80	SBI Securities Co., Ltd.	125	0.00%	$1K	+120 (+2400.0%)
81	Rialto Wealth Management, LLC	79	0.00%	$684	NEW
82	Fortitude Family Office, LLC	61	0.00%	$528	—
83	Sterling Capital Management LLC	57	0.00%	$493	NEW
84	SALEM INVESTMENT COUNSELORS INC	25	0.00%	$217	—
85	Caitong International Asset Management Co., Ltd	2	0.00%	$17	NEW

Exited since 2026-03-31 (9 filers; largest 9 shown)

RBF Capital, LLC	−60,000
Hudson Bay Capital Management LP	−27,112
SIMPLEX TRADING, LLC	−20,162
OMERS ADMINISTRATION Corp	−19,300
HRT FINANCIAL LP	−18,621
D'Orazio & Associates, Inc.	−11,103
DUDLEY CAPITAL MANAGEMENT, LLC	−11,000
Schonfeld Strategic Advisors LLC	−10,300
QUADRANT CAPITAL GROUP LLC	−18

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Columbia Management Investment Advisers, LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	905,679	4.5%
Ameriprise Financial, Inc.	SCHEDULE 13G/A	2026-08-14	2026-06-30	905,679	4.5%
RUTABAGA CAPITAL MANAGEMENT LLC/MA	SCHEDULE 13G/A	2026-01-22	2025-12-31	0	0%
Galloway Capital Partners, LLC	SCHEDULE 13D	2025-12-19	2025-12-17	1,056,200	5.19%
Galloway Capital, LP	SCHEDULE 13D	2025-12-19	2025-12-17	1,056,200	5.19%
GALLOWAY BRUCE	SCHEDULE 13D	2025-12-19	2025-12-17	1,056,200	5.19%
The Louis Berkman Investment Company	SCHEDULE 13D/A	2025-11-26	2025-11-17	3,127,792	15.39%
ANCORA MERLIN INSTITUTIONAL, LP	SCHEDULE 13D/A	2025-11-14	2025-11-13	355,747	1.8%
Ancora Holdings Group, LLC	SCHEDULE 13D/A	2025-11-14	2025-11-13	784,432	3.9%
DiSanto Fredrick D.	SCHEDULE 13D/A	2025-11-14	2025-11-13	857,065	4.2%
Ancora Alternatives LLC	SCHEDULE 13D/A	2025-11-14	2025-11-13	784,432	3.9%
Ancora Catalyst Institutional, LP	SCHEDULE 13D/A	2025-11-14	2025-11-13	360,790	1.8%
Ancora Catalyst, LP	SCHEDULE 13D/A	2025-11-14	2025-11-13	31,404	0.2%
Ancora Merlin, LP	SCHEDULE 13D/A	2025-11-14	2025-11-13	36,491	0.2%
GABELLI FUNDS LLC	SCHEDULE 13D/A	2025-08-04	2025-08-01	1,367,800	6.8%
GABELLI MARIO J	SCHEDULE 13D/A	2025-08-04	2025-08-01	0	0%
GAMCO Asset Management Inc.	SCHEDULE 13D/A	2025-08-04	2025-08-01	2,409,135	12%
GAMCO INVESTORS, INC. ET AL	SCHEDULE 13D/A	2025-08-04	2025-08-01	0	0%
GGCP, INC.	SCHEDULE 13D/A	2025-08-04	2025-08-01	21,000	0.1%
MJG ASSOCIATES, INC.	SCHEDULE 13D/A	2025-08-04	2025-08-01	10,000	0.1%
Associated Capital Group, Inc.	SCHEDULE 13D/A	2025-08-04	2025-08-01	0	0%
Teton Advisors, Inc.	SCHEDULE 13D/A	2025-08-04	2025-08-01	112,000	0.6%
GABELLI FOUNDATION, INC.	SCHEDULE 13D/A	2025-08-04	2025-08-01	16,000	0.1%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.