AP · Ampco Pittsburgh Corp · Shareholders & Ownership

$7.48 +0.68 (+9.93%) Play latest call Q3 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$140.48M

20.66M

Volume · Nov 11 70.63K Avg daily vol (3M) 93.28K

Every disclosed holder of AP in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns AP

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	92	11,488,741	55.61%	Yes
Insiders (Forms 3, 4, 5)	13	4,759,960	23.04%	Yes
13D/G-only blocks	2	2,042,780	9.89%	Yes
Remaining	—	2,367,222	11.46%	Rest
Registered funds (N-PORT, not summed)	112	5,913,191	28.62%	No

Shares outstanding: 20,658,703, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of AP

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	The Louis Berkman Investment Company 13D CIK 1351834 · Unknown · Nov 17, 2025 Item 4 purpose: Passive investment not summed	3,127,792	15.14%	—	Nov 17, 2025	not summed
1.1	Louis Berkman Investment CO Insider CIK 1351834 · Nov 17, 2025 10% Owner, issuer-wide	3,127,792	15.14%	+92,999	Nov 17, 2025	10% Owner, issuer-wide
2	GAMCO INVESTORS, INC. ET AL 13F CIK 807249 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,459,829	11.91%	-32,128	Jun 30, 2026	carried, not yet filed for the newest quarter
3	GABELLI FUNDS LLC 13F CIK 1081407 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,391,800	6.74%	-8,000	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	The Gabelli ABC Fund Fund S000001070 · Registered fund · Jun 30, 2026 Gabelli Investor Funds Inc, not summed	200,000	0.97%	0	Jun 30, 2026	Gabelli Investor Funds Inc, not summed
3.2	The Gabelli Small Cap Growth Fund Fund S000001062 · Registered fund · Jun 30, 2026 Gabelli Equity Series Funds Inc, not summed	200,000	0.97%	-8,000	Jun 30, 2026	Gabelli Equity Series Funds Inc, not summed
3.3	Gabelli Global Mini Mites Fund Fund S000063160 · Registered fund · Jun 30, 2026 GAMCO Global Series Funds, Inc, not summed	128,500	0.62%	0	Jun 30, 2026	GAMCO Global Series Funds, Inc, not summed
3.4	The Gabelli Asset Fund Fund S000001087 · Registered fund · Jun 30, 2026 Gabelli Asset Fund, not summed	40,000	0.19%	0	Jun 30, 2026	Gabelli Asset Fund, not summed
3.5	The Gabelli Value 25 Fund Inc. Fund S000001076 · Registered fund · Jun 30, 2026 Gabelli Value 25 Fund Inc, not summed	39,000	0.19%	0	Jun 30, 2026	Gabelli Value 25 Fund Inc, not summed
4	Galloway Capital Partners, LLC 13D CIK 1991451 · Unknown · Dec 17, 2025	1,056,200	5.11%	—	Dec 17, 2025
5	1290 VT GAMCO Small Company Value Portfolio Fund S000009151 · Registered fund · Jun 30, 2026 EQ Advisors Trust, not summed	995,000	4.82%	0	Jun 30, 2026	EQ Advisors Trust, not summed
6	L. W. Van Loan Trust dated September 8, 2006 13D CIK 1820922 · Unknown · Feb 16, 2024 unconfirmed, last confirmed Feb 16, 2024	986,580	4.78%	—	Feb 16, 2024	unconfirmed, last confirmed Feb 16, 2024
7	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	982,611	4.76%	+779,478	Jun 30, 2026	carried, not yet filed for the newest quarter
7.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	354,698	1.72%	—	Jun 30, 2026	iShares Trust, not summed
7.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	152,209	0.74%	—	Jun 30, 2026	iShares Trust, not summed
7.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	54,381	0.26%	+16,057	Jun 30, 2026	iShares Trust, not summed
7.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	30,298	0.15%	—	Jun 30, 2026	Quantitative Master Series LLC, not summed
7.5	iShares Russell Small/Mid-Cap Index Fund Fund S000050373 · Registered fund · Jul 31, 2026 BlackRock Funds, not summed	3,911	0.02%	—	Jul 31, 2026	BlackRock Funds, not summed
8	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	905,679	4.38%	-267,345	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	AMERIPRISE FINANCIAL INC 13G CIK 820027 · Investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	905,679	4.38%	-173,704	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
8.2	Columbia Small Cap Value Discovery Fund Fund S000012102 · Registered fund · Jul 31, 2026 COLUMBIA FUNDS SERIES TRUST I, not summed	633,493	3.07%	-239,292	Jul 31, 2026	COLUMBIA FUNDS SERIES TRUST I, not summed
8.3	Columbia Variable Portfolio - Small Cap Value Discovery Fund Fund S000012561 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed	114,758	0.56%	-59,191	Jun 30, 2026	COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed
9	Ancora Alternatives LLC 13D CIK 1836192 · Registered investment adviser · Nov 13, 2025 Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands not summed	784,432	3.80%	—	Nov 13, 2025	not summed
10	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	660,945	3.20%	+4,944	Jun 30, 2026	carried, not yet filed for the newest quarter
11	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	604,091	2.92%	+3,977	Jun 30, 2026	carried, not yet filed for the newest quarter
12	McBrayer Brett Insider CIK 1744984 · May 19, 2026 Director, Chief Executive Officer, issuer-wide	557,694	2.70%	+3,300	May 19, 2026	Director, Chief Executive Officer, issuer-wide
13	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	458,240	2.22%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
14	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	414,419	2.01%	-8,800	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · Aug 31, 2026 American Century ETF Trust, not summed	357,681	1.73%	+90,729	Aug 31, 2026	American Century ETF Trust, not summed
16	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Sep 30, 2026	329,861	1.60%	-12,975	Sep 30, 2026
17	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	328,848	1.59%	+109,988	Jun 30, 2026	carried, not yet filed for the newest quarter
18	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Sep 30, 2026	286,206	1.39%	+95,191	Sep 30, 2026
19	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Sep 30, 2026	253,069	1.23%	-42,375	Sep 30, 2026
19.1	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	49,676	0.24%	-31,957	Jul 31, 2026	Dimensional ETF Trust, not summed
19.2	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	38,726	0.19%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
19.3	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	16,406	0.08%	+4,086	Jul 31, 2026	Dimensional ETF Trust, not summed
19.4	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	11,324	0.05%	+5,006	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
19.5	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	8,665	0.04%	+6,154	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
20	Meros Investment Management, LP 13F CIK 1911372 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	239,910	1.16%	+25,060	Jun 30, 2026	carried, not yet filed for the newest quarter
21	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	195,321	0.95%	+168,722	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Lyon Samuel Insider CIK 1747181 · Jun 25, 2026 President of Union Electric, issuer-wide	181,233	0.88%	-9,500	Jun 25, 2026	President of Union Electric, issuer-wide
23	McAuley Michael G Insider CIK 1612993 · May 15, 2025 Senior V.P., CFO & Treasurer, issuer-wide	175,765	0.85%	+22,400	May 15, 2025	Senior V.P., CFO & Treasurer, issuer-wide
24	O'SHAUGHNESSY ASSET MANAGEMENT, LLC 13F CIK 1423442 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	174,312	0.84%	+51,894	Jun 30, 2026	carried, not yet filed for the newest quarter
25	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	159,316	0.77%	+99,900	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	3,800	0.02%	—	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
25.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	409	0.00%	—	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
26	ABEL JAMES J Insider CIK 1192135 · May 15, 2025 Director, issuer-wide	150,546	0.73%	+12,728	May 15, 2025	Director, issuer-wide
27	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	150,371	0.73%	-17,930	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Huntleigh Advisors, Inc. 13F CIK 1367653 · Registered investment adviser · Sep 30, 2026	143,519	0.69%	+2,347	Sep 30, 2026
29	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	130,253	0.63%	+3,977	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
30	Teton Advisors, LLC 13F CIK 2086025 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	130,000	0.63%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	TETON Westwood Mighty Mites Fund Fund S000001084 · Registered fund · Jun 30, 2026 Teton Westwood Funds, not summed	130,000	0.63%	0	Jun 30, 2026	Teton Westwood Funds, not summed
32	Fessenden Elizabeth Anne Insider CIK 1452008 · May 15, 2026 Director, issuer-wide	126,704	0.61%	+7,374	May 15, 2026	Director, issuer-wide
33	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	125,386	0.61%	-29,024	Jun 30, 2026	carried, not yet filed for the newest quarter
33.1	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	46,200	0.22%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
33.2	Omni Small-Cap Value Fund Fund S000033567 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	25,000	0.12%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
34	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	121,477	0.59%	+93,058	Jun 30, 2026	carried, not yet filed for the newest quarter
34.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	8,402	0.04%	—	Jun 30, 2026	Northern Funds, not summed
34.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	1,957	0.01%	0	Jun 30, 2026	Northern Funds, not summed
35	1290 GAMCO Small/Mid Cap Value Fund Fund S000045910 · Registered fund · Jul 31, 2026 1290 Funds, not summed	120,000	0.58%	0	Jul 31, 2026	1290 Funds, not summed
36	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	112,721	0.55%	+112,721	Jun 30, 2026	carried, not yet filed for the newest quarter
37	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	100,724	0.49%	+59,994	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · Aug 31, 2026 Goldman Sachs ETF Trust, not summed	27,636	0.13%	—	Aug 31, 2026	Goldman Sachs ETF Trust, not summed
37.2	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	17,928	0.09%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
37.3	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	13,091	0.06%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
37.4	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	5,347	0.03%	—	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
37.5	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	23	0.00%	—	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
38	Gabelli Global Small & Mid Cap Value Trust Fund · Registered fund · Jun 30, 2026 Gabelli Global Small & Mid Cap Value Trust, not summed	100,000	0.48%	—	Jun 30, 2026	Gabelli Global Small & Mid Cap Value Trust, not summed
38.1	Gabelli Equity Trust Inc Fund · Registered fund · Jun 30, 2026 Gabelli Equity Trust Inc, not summed	415,000	2.01%	—	Jun 30, 2026	Gabelli Equity Trust Inc, not summed
38.2	Gabelli Dividend & Income Trust Fund · Registered fund · Jun 30, 2026 Gabelli Dividend & Income Trust, not summed	255,000	1.23%	—	Jun 30, 2026	Gabelli Dividend & Income Trust, not summed
39	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	92,875	0.45%	+20,062	Jun 30, 2026	carried, not yet filed for the newest quarter
40	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · Aug 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	92,421	0.45%	—	Aug 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
41	PAUL LAURENCE E Insider CIK 1190966 · May 15, 2026 Director, issuer-wide	91,742	0.44%	+7,374	May 15, 2026	Director, issuer-wide
42	Informed Momentum Co LLC 13F CIK 1510989 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	90,053	0.44%	-25,740	Jun 30, 2026	carried, not yet filed for the newest quarter
43	DeMichiei Robert Insider CIK 1928634 · May 15, 2026 Director, issuer-wide	85,559	0.41%	+7,374	May 15, 2026	Director, issuer-wide
44	UBS Group AG 13F CIK 1610520 · Bank · Sep 30, 2026	84,938	0.41%	+52,784	Sep 30, 2026
45	Anderson David George Insider CIK 1905958 · May 15, 2026 VP, CFO & Treasurer, Pres. ALS, issuer-wide	82,966	0.40%	-3,137	May 15, 2026	VP, CFO & Treasurer, Pres. ALS, issuer-wide
46	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	80,361	0.39%	-80,930	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Palumbo Wealth Management LLC 13F CIK 1846310 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	79,185	0.38%	+63,952	Jun 30, 2026	carried, not yet filed for the newest quarter
48	RITHOLTZ WEALTH MANAGEMENT 13F CIK 1698218 · Registered investment adviser · Sep 30, 2026	75,575	0.37%	-57,368	Sep 30, 2026
49	DiSanto Frederick D. Insider CIK 1498290 · Dec 31, 2025 Director, issuer-wide	72,633	0.35%	-1,068,531	Dec 31, 2025	Director, issuer-wide
50	McNair Darrell L Insider CIK 1912179 · Aug 27, 2026 Director, issuer-wide	72,326	0.35%	-5,600	Aug 27, 2026	Director, issuer-wide

11 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 168 holders

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Key facts CIK 6176 CUSIP 032037103 13F (30d) 34 filings 32 filers Visit website Investor relations