AP · Ampco Pittsburgh Corp

$8.80 +0.36 (+4.27%) At close · Aug 21

Market Cap

$174.36M

20.66M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 85

Total Value: $101,264,389

Total Shares: 11,706,871

Institutional Ownership Trend

26 quarters

Superinvestors Holding AP

All superinvestors →

Mario Gabelli $21,277,520

Holder Concentration

Across 85 13F filers · Δ vs Mar 31, 2026

Top Holder

21.0%

−3.0 pts

Top 5

54.7%

−6.3 pts

Top 10

71.6%

−3.2 pts

HHI

838

Broadly held−194

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +22

Institutional value: +45.3%

Shares held: +12.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega BlackRock, Inc.	+779,478	982,611
Mega GEODE CAPITAL MANAGEMENT, LLC	+207,773	342,836
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	+131,022	238,321
Mega AMERICAN CENTURY COMPANIES INC	+109,988	328,848
Large ACADIAN ASSET MANAGEMENT LLC	+107,423	191,015

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega AMERIPRISE FINANCIAL INC	−267,345	905,679
Mega MILLENNIUM MANAGEMENT LLC	−140,615	19,793
Large SEI INVESTMENTS CO	−118,425	65,911
Small Huntleigh Advisors, Inc.	−89,306	141,172
Large MARSHALL WACE, LLP	−80,930	80,361

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega VANGUARD PORTFOLIO MANAGEMENT LLC	112,721	$975,036
Large Caption Management, LLC	90,000	$778,500
Large PANAGORA ASSET MANAGEMENT INC	52,441	$453,614
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC	39,373	$340,576
Mega Bank of New York Mellon Corp	33,984	$293,960

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid RBF Capital, LLC	60,000	$403,200
Large Hudson Bay Capital Management LP	27,112	$182,192
Mid SIMPLEX TRADING, LLC	20,162	$135,488
Large OMERS ADMINISTRATION Corp	19,300	$129,696
Large HRT FINANCIAL LP	18,621	$125,133

Filter: New 31 Increased 27 Reduced 18 Sold out 9 Unchanged 9

Showing 89 of 89

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

GAMCO INVESTORS, INC. ET AL

$21,277,520

21.01%

2,459,829

GABELLI FUNDS LLC

$12,039,070

11.89%

1,391,800

BlackRock, Inc.

$8,499,583

8.39%

982,611

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	4,339	$37,532	0.4%	Sole
BlackRock Investment Management, LLC	46,372	$401,117	4.7%	Sole
BLACKROCK ADVISORS LLC	36,380	$314,687	3.7%	Sole
BlackRock Fund Advisors	562,818	$4,868,375	57.3%	Sole
BlackRock Institutional Trust Company, N.A.	332,702	$2,877,872	33.9%	Sole

AMERIPRISE FINANCIAL INC

$7,834,123

7.74%

905,679

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	905,679	$7,834,123	100.0%	Defined

WELLS FARGO & COMPANY/MN

$5,717,174

5.65%

660,945

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	14,785	$127,890	2.2%	Defined
WELLS FARGO CLEARING SERVICES, LLC	646,160	$5,589,284	97.8%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$5,225,387

5.16%

604,091

RENAISSANCE TECHNOLOGIES LLC

$3,584,724

3.54%

414,419

GEODE CAPITAL MANAGEMENT, LLC

$2,965,530

2.93%

342,836

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	50,090	$433,278	14.6%	Defined
Held directly	292,746	$2,532,252	85.4%	Defined

AMERICAN CENTURY COMPANIES INC

$2,844,535

2.81%

328,848

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	328,848	$2,844,535	100.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$2,555,589

2.52%

295,444

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	700	$6,055	0.2%	Defined
DFA Australia Ltd.	2,831	$24,488	1.0%	Defined
Dimensional Ireland Ltd	46,466	$401,930	15.7%	Defined
Held directly	245,447	$2,123,116	83.1%	Sole

Meros Investment Management, LP

$2,075,221

2.05%

239,910

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$1,689,526

1.67%

195,321

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	195,321	$1,689,526	100.0%	Other

ACADIAN ASSET MANAGEMENT LLC

$1,652,279

1.63%

191,015

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	191,015	$1,652,279	100.0%	Defined

O'SHAUGHNESSY ASSET MANAGEMENT, LLC

$1,507,798

1.49%

174,312

STATE STREET CORP

$1,378,083

1.36%

159,316

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	159,316	$1,378,083	100.0%	Defined

JANE STREET GROUP, LLC

$1,300,708

1.28%

150,371

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	130,606	$1,129,741	86.9%	Defined
Jane Street Global Trading, LLC	19,765	$170,967	13.1%	Defined

Huntleigh Advisors, Inc.

$1,221,137

1.21%

141,172

RITHOLTZ WEALTH MANAGEMENT

$1,149,956

1.14%

132,943

Teton Advisors, LLC

$1,124,500

1.11%

130,000

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$1,084,588

1.07%

125,386

NORTHERN TRUST CORP

$1,050,775

1.04%

121,477

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	118,930	$1,028,744	97.9%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	2,547	$22,031	2.1%	Other

VANGUARD PORTFOLIO MANAGEMENT LLC

$975,036

0.96%

112,721

GOLDMAN SACHS GROUP INC

$871,262

0.86%

100,724

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	29,587	$255,927	29.4%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	71,137	$615,335	70.6%	Defined

VANGUARD FIDUCIARY TRUST CO

$803,368

0.79%

92,875

Informed Momentum Co LLC

$778,958

0.77%

90,053

Caption Management, LLC

$778,500

0.77%

90,000

MARSHALL WACE, LLP

$695,122

0.69%

80,361

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	80,361	$695,122	100.0%	Other

Palumbo Wealth Management LLC

$684,950

0.68%

79,185

SEI INVESTMENTS CO

$570,130

0.56%

65,911

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	65,911	$570,130	100.0%	Sole

PANAGORA ASSET MANAGEMENT INC

$453,614

0.45%

52,441

CITADEL ADVISORS LLC

$444,687

0.44%

51,409

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	11,939	$103,272	23.2%	Defined
Held directly	39,470	$341,415	76.8%	Defined

Empowered Funds, LLC

$434,973

0.43%

50,286

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Bridgeway Capital Management, LLC	50,286	$434,973	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$371,950

0.37%

43,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	43,000	$371,950	100.0%	Other

JANE STREET GROUP, LLC

$358,110

0.35%

41,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	41,400	$358,110	100.0%	Defined

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$340,576

0.34%

39,373

Bank of New York Mellon Corp

$293,960

0.29%

33,984

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	9,342	$80,808	27.5%	Defined
The Bank of New York Mellon	24,641	$213,144	72.5%	Defined
Held directly	1	$8	0.0%	Defined

Qube Research & Technologies Ltd

$278,789

0.28%

32,230

UBS Group AG

$278,132

0.27%

32,154

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	16,000	$138,400	49.8%	Defined
UBS AG	16,154	$139,732	50.2%	Defined

Dynamic Technology Lab Private Ltd

$262,726

0.26%

30,373

OCCUDO QUANTITATIVE STRATEGIES LP

$215,696

0.21%

24,936

XTX Topco Ltd

$207,556

0.20%

23,995

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	23,995	$207,556	100.0%	Defined

Central Pacific Bank - Trust Division

$193,768

0.19%

22,401

GSA CAPITAL PARTNERS LLP

$187,194

0.18%

21,641

Nuveen, LLC

$185,274

0.18%

21,419

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TEACHERS ADVISORS, LLC joint	21,419	$185,274	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$171,209

0.17%

19,793

Janney Montgomery Scott LLC

$151,513

0.15%

17,516

CITADEL ADVISORS LLC

$150,510

0.15%

17,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	17,400	$150,510	100.0%	Defined

JANE STREET GROUP, LLC

$148,780

0.15%

17,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	17,200	$148,780	100.0%	Defined

Brevan Howard Capital Management LP

$141,756

0.14%

16,388

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Brevan Howard US Investment Management, LP	16,388	$141,756	100.0%	Defined

DEUTSCHE BANK AG\

$139,584

0.14%

16,137

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	328	$2,837	2.0%	Defined
DWS Investments UK Ltd	15,809	$136,747	98.0%	Defined

RAFFLES ASSOCIATES LP

$129,750

0.13%

15,000

Graham Capital Management, L.P.

$128,322

0.13%

14,835

STRS OHIO

$121,100

0.12%

14,000

BANK OF AMERICA CORP /DE/

$120,702

0.12%

13,954

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	13,954	$120,702	100.0%	Defined

RHUMBLINE ADVISERS

$118,150

0.12%

13,659

MORGAN STANLEY

$117,291

0.12%

13,560

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	17	$147	0.1%	Defined
MORGAN STANLEY & CO. LLC	4,289	$37,099	31.6%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	1,541	$13,329	11.4%	Defined
MORGAN STANLEY SMITH BARNEY LLC	5,376	$46,501	39.6%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	2,337	$20,215	17.2%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$116,671

0.12%

13,488

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	13,488	$116,671	100.0%	Defined

IMC-Chicago, LLC

$115,183

0.11%

13,316

Engineers Gate Manager LP

$106,455

0.11%

12,307

ALGERT GLOBAL LLC

$100,703

0.10%

11,642

Hodges Capital Management Inc.

$96,750

0.10%

11,185

MetLife Investment Management, LLC

$85,591

0.08%

9,895

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	9,895	$85,591	100.0%	Defined

CITIGROUP INC

$79,008

0.08%

9,134

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citibank, N.A. joint	1,514	$13,096	16.6%	Defined
Citigroup Financial Products Inc. joint	7,620	$65,912	83.4%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$64,554

0.06%

7,463

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	7,463	$64,554	100.0%	Defined

JPMORGAN CHASE & CO

$62,712

0.06%

7,250

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	6,719	$58,119	92.7%	Defined
J.P. Morgan Securities plc	531	$4,593	7.3%	Defined

GROUP ONE TRADING LLC

$60,593

0.06%

7,005

PNC FINANCIAL SERVICES GROUP, INC.

$57,090

0.06%

6,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	6,600	$57,090	100.0%	Defined

Police & Firemen's Retirement System of New Jersey

$41,347

0.04%

4,780

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	4,780	$41,347	100.0%	Defined

Vanguard Global Advisers, LLC

$31,814

0.03%

3,678

BARCLAYS PLC

$28,899

0.03%

3,341

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	2,454	$21,227	73.5%	Defined
BARCLAYS CAPITAL INC.	887	$7,672	26.5%	Defined

NEW YORK STATE COMMON RETIREMENT FUND

$25,085

0.02%

2,900

BNP PARIBAS ARBITRAGE, SA

$24,332

0.02%

2,813

Legal & General Group Plc

$13,675

0.01%

1,581

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	1,581	$13,675	100.0%	Defined

Ameritas Investment Partners, Inc.

$12,724

0.01%

1,471

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	1,471	$12,724	100.0%	Other

Russell Investments Group, Ltd.

$11,210

0.01%

1,296

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	1,296	$11,210	100.0%	Defined

Tower Research Capital LLC (TRC)

$9,835

0.01%

1,137

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	1,137	$9,835	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$8,364

0.01%

967

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	967	$8,364	100.0%	Sole

ROYAL BANK OF CANADA

$6,115

0.01%

707

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	707	$6,115	100.0%	Defined

FMR LLC

$6,055

0.01%

700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	700	$6,055	100.0%	Defined

Farther Finance Advisors, LLC

$5,190

0.01%

600

Markowski Investments

$4,325

0.00%

500

FEDERATED HERMES, INC.

$3,174

0.00%

367

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	367	$3,174	100.0%	Defined

OSAIC HOLDINGS, INC.

$3,114

0.00%

360

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	260	$2,249	72.2%	Defined
Osaic Advisory Services, LLC	100	$865	27.8%	Defined

SBI Securities Co., Ltd.

$1,081

0.00%

125

Rialto Wealth Management, LLC

$683

0.00%

Fortitude Family Office, LLC

$527

0.00%

Sterling Capital Management LLC

$493

0.00%

SALEM INVESTMENT COUNSELORS INC

$216

0.00%

Caitong International Asset Management Co., Ltd

$17

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Hudson Bay Capital UK LLP	27,112	$182,192	100.0%	Defined

Key facts CIK 6176 CUSIP 032037103 13F (30d) 82 filings 81 filers Visit website Investor relations