Ampco Pittsburgh Corp: which funds bought and sold

Institutions that bought and sold Ampco Pittsburgh shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 57 institutions that filed 13F reports for both quarters added to or opened positions in Ampco Pittsburgh, and 28 cut or closed them. Together they added a net 1.2M shares, +12.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 76K shares (+1.4%); index fund managers were net buyers of 1.4M shares (+124.7%). 30 opened a new position and 9 sold out entirely.

Bought, Q2 2026 57 institutions, 30 of them new holders Sold, Q2 2026 28 institutions, 9 of them sold out

Net change, all compared +1.2M shares (+12.2%)

Net change, active managers +76K shares (+1.4%), 11 bought, 10 sold

Buyers versus sellers

institutions compared, 93

57 bought 8 28 sold

Active managers and hedge funds 11 bought · 10 sold · +76K

Index fund managers 9 bought · 0 sold · +1.4M

Other institutions 37 bought · 18 sold · −197K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+779K +383.7%	983K	$8.5M
Geode Capital Management, LLC Index funds	+208K +153.8%	343K	$3M
Susquehanna International Group, LLP	+169K +634.3%	195K	$1.7M
Vanguard Portfolio Management LLC Index funds	+113K New position	113K	$975,037
American Century Companies Inc Active manager	+110K +50.3%	329K	$2.8M
Acadian Asset Management LLC Active manager	+107K +128.5%	191K	$1.6M
State Street Corp Index funds	+100K +168.1%	159K	$1.4M
Northern Trust Corp Index funds	+93K +327.4%	121K	$1.1M
Palumbo Wealth Management LLC	+64K +419.8%	79K	$684,951
Goldman Sachs Group Inc	+60K +147.3%	101K	$871,263
Panagora Asset Management Inc Active manager	+52K New position	52K	$453,615
O'Shaughnessy Asset Management, LLC Active manager	+52K +42.4%	174K	$1.5M
Charles Schwab Investment Management Inc Index funds	+39K New position	39K	$340,576
Citadel Advisors LLC Hedge fund	+37K +256.0%	51K	$444,688
Bank Of New York Mellon Corp	+34K New position	34K	$293,964
Qube Research & Technologies Ltd Hedge fund	+32K New position	32K	$278,790
Dynamic Technology Lab Private Ltd	+30K New position	30K	$263,000
Meros Investment Management, LP	+25K +11.7%	240K	$2.1M
Occudo Quantitative Strategies LP	+25K New position	25K	$215,696
Nuveen, LLC	+21K New position	21K	$185,274

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
American Century Companies Inc Active manager	+110K +50.3%	329K	$2.8M
Acadian Asset Management LLC Active manager	+107K +128.5%	191K	$1.6M
Panagora Asset Management Inc Active manager	+52K New position	52K	$453,615
O'Shaughnessy Asset Management, LLC Active manager	+52K +42.4%	174K	$1.5M
Citadel Advisors LLC Hedge fund	+37K +256.0%	51K	$444,688
Qube Research & Technologies Ltd Hedge fund	+32K New position	32K	$278,790
Graham Capital Management, L.P. Hedge fund	+15K New position	15K	$128,323
Price T Rowe Associates Inc Active manager	+13K New position	13K	$117,000
Engineers Gate Manager LP Hedge fund	+12K New position	12K	$106,456
FMR LLC Active manager	+700 New position	700	$6,055

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Ameriprise Financial Inc	−267K −22.8%	906K	$7.8M
Millennium Management LLC Hedge fund	−141K −87.7%	20K	$171,209
Sei Investments Co	−118K −64.2%	66K	$570,130
Huntleigh Advisors, Inc.	−89K −38.7%	141K	$1.2M
Marshall Wace, LLP Hedge fund	−81K −50.2%	80K	$695,123
Rbf Capital, LLC	−60K Sold out	0	—
Dimensional Fund Advisors LP	−60K −16.9%	295K	$2.6M
GAMCO Investors, Inc. Et Al Active manager	−32K −1.3%	2.5M	$21.3M
Bridgeway Capital Management, LLC Active manager	−29K −18.8%	125K	$1.1M
Hudson Bay Capital Management LP Hedge fund	−27K Sold out	0	—
Informed Momentum Co LLC	−26K −22.2%	90K	$778,958
Xtx Topco Ltd	−25K −50.6%	24K	$207,557
Simplex Trading, LLC	−20K Sold out	0	—
Omers Administration Corp	−19K Sold out	0	—
HRT Financial LP	−19K Sold out	0	—
Jane Street Group, LLC	−18K −10.7%	150K	$1.3M
Algert Global LLC Hedge fund	−17K −59.8%	12K	$100,703
UBS Group AG	−12K −26.5%	32K	$278,132
D'Orazio & Associates, Inc.	−11K Sold out	0	—
Dudley Capital Management, LLC	−11K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−141K −87.7%	20K	$171,209
Marshall Wace, LLP Hedge fund	−81K −50.2%	80K	$695,123
GAMCO Investors, Inc. Et Al Active manager	−32K −1.3%	2.5M	$21.3M
Bridgeway Capital Management, LLC Active manager	−29K −18.8%	125K	$1.1M
Hudson Bay Capital Management LP Hedge fund	−27K Sold out	0	—
Algert Global LLC Hedge fund	−17K −59.8%	12K	$100,703
Schonfeld Strategic Advisors LLC Hedge fund	−10K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−8,800 −2.1%	414K	$3.6M
Gabelli Funds LLC Active manager	−8,000 −0.6%	1.4M	$12M
Brevan Howard Capital Management LP Hedge fund	−2,339 −12.5%	16K	$141,756

New positions

largest by value

Institution	Shares	Value June 30, 2026
Vanguard Portfolio Management LLCIndex funds	113K	$975,037
Panagora Asset Management IncActive manager	52K	$453,615
Charles Schwab Investment Management IncIndex funds	39K	$340,576
Bank Of New York Mellon Corp	34K	$293,964
Qube Research & Technologies LtdHedge fund	32K	$278,790
Dynamic Technology Lab Private Ltd	30K	$263,000
Occudo Quantitative Strategies LP	25K	$215,696
Nuveen, LLC	21K	$185,274
Deutsche Bank Ag\	16K	$139,585
Graham Capital Management, L.P.Hedge fund	15K	$128,323

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Rbf Capital, LLC	60K	$403,200
Hudson Bay Capital Management LPHedge fund	27K	$182,193
Simplex Trading, LLC	20K	$135,488
Omers Administration Corp	19K	$129,696
HRT Financial LP	19K	$125,000
D'Orazio & Associates, Inc.	11K	$74,613
Dudley Capital Management, LLC	11K	$73,920
Schonfeld Strategic Advisors LLCHedge fund	10K	$69,216
Quadrant Capital Group LLC	18	$121

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 85
Ten largest holders: 72.8%
Index fund managers: 21.4%
Active managers and hedge funds: 46.8%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	11	10	7	2	+76K	+1.4%
Index fund managers	9	0	3	0	+1.4M	+124.7%
Other institutions	37	18	20	7	−197K	−5.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Ampco Pittsburgh.

Only managers that filed a holdings report for both quarters are compared (93 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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