Ampco-Pittsburgh Corporation
Ampco-Pittsburgh Corporation (AP) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AP · as of Sep 30, 2025
Ownership Breakdown
36
Institutional Holders
▼ 4 vs Q2
$18.99M
Total Inst. Value
▼ $6.34M vs Q2
20.33M
Shares Outstanding
freeFloat 69.12%
8.29M
13F Shares Held
▼ 264,265 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AP largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
GAMCO INVESTORS, INC. ET AL pumps & pumping equipment | 2.38M | 11.86% | 11.86% | $5.46B | Nov 12, 2025 | ▼ 63.3K |
GABELLI FUNDS LLC pumps & pumping equipment | 1.38M | 6.87% | 6.87% | $3.16B | Nov 12, 2025 | ▲ 13.0K |
AMERIPRISE FINANCIAL INC pumps & pumping equipment | 1.15M | 5.73% | 5.73% | $2.64B | Nov 14, 2025 | ▼ 8.0K |
ANCORA ADVISORS, LLC pumps & pumping equipment | 951.3K | 4.73% | 4.73% | $2.18B | Nov 14, 2025 | ▼ 117.2K |
VANGUARD GROUP INC pumps & pumping equipment | 667.7K | 3.32% | 3.32% | $1.53B | Nov 7, 2025 | ▲ 38.0K |
RENAISSANCE TECHNOLOGIES LLC pumps & pumping equipment | 480.6K | 2.39% | 2.39% | $1.10B | Nov 13, 2025 | ▲ 31.8K |
DIMENSIONAL FUND ADVISORS LP pumps & pumping equipment | 336.1K | 1.67% | 1.67% | $769.77M | Nov 12, 2025 | ▼ 1.7K |
BLACKROCK, INC. pumps & pumping equipment | 169.2K | 84.16% | 84.16% | $387.56M | Nov 12, 2025 | ▲ 3.9K |
GEODE CAPITAL MANAGEMENT, LLC pumps & pumping equipment | 142.1K | 70.67% | 70.67% | $325.50M | Nov 12, 2025 | ▼ 20.0K |
BRIDGEWAY CAPITAL MANAGEMENT, LLC pumps & pumping equipment | 127.5K | 63.43% | 63.43% | $292.06M | Nov 14, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
10
Increased
+126.9K shares2
New Positions
first time holders13
Decreased
−267.3K shares7
Sold Out
fully exitedNet shares change (top 50)
140.4K
+126.9K / −267.3K
Net new holders
-8
2 new / 7 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AP insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
12
Sell transactions
0.83
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
McBrayer Brett Chief Executive Officer | May 19, 2026 | Purchase | 3,300 | $9.03 | $29.8K | 557.7K | Form 4 ↗ |
Anderson David George VP, CFO & Treasurer, Pres. ALS | May 15, 2026 | Tax Withhold | 1,370 | $10.85 | $14.9K | 84.7K | Form 4 ↗ |
Anderson David George VP, CFO & Treasurer, Pres. ALS | May 15, 2026 | Award | 11,117 | — | — | 83.0K | Form 4 ↗ |
Anderson David George VP, CFO & Treasurer, Pres. ALS | May 15, 2026 | Tax Withhold | 2,179 | $10.85 | $23.6K | 82.6K | Form 4 ↗ |
Anderson David George VP, CFO & Treasurer, Pres. ALS | May 15, 2026 | Tax Withhold | 2,489 | $10.85 | $27.0K | 80.1K | Form 4 ↗ |
Anderson David George VP, CFO & Treasurer, Pres. ALS | May 15, 2026 | Tax Withhold | 8,216 | $10.85 | $89.1K | 71.8K | Form 4 ↗ |
Lyon Samuel President of Union Electric | May 15, 2026 | Tax Withhold | 3,029 | $10.85 | $32.9K | 201.1K | Form 4 ↗ |
Lyon Samuel President of Union Electric | May 15, 2026 | Tax Withhold | 3,166 | $10.85 | $34.4K | 198.0K | Form 4 ↗ |
Lyon Samuel President of Union Electric | May 15, 2026 | Tax Withhold | 3,547 | $10.85 | $38.5K | 194.4K | Form 4 ↗ |
Lyon Samuel President of Union Electric | May 15, 2026 | Award | 15,056 | — | — | 191.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Ampco-Pittsburgh Corporation (AP) is primarily owned by institutional investors, who hold approximately 40.8% of total shares outstanding. Company insiders own approximately 30.88%, while retail and public investors account for the remaining 28.32%.
The largest institutional shareholder of Ampco-Pittsburgh Corporation is GAMCO INVESTORS, INC. ET AL, holding approximately 2.38 million shares — equal to 11.86% of outstanding shares — as of September 30, 2025.
A total of 36 institutional investors currently hold AP stock, with a combined institutional value of approximately $18,989,069 as of the most recent 13F filing period.
Frequently asked questions
AP ownershipAmpco-Pittsburgh Corporation (AP) is primarily owned by institutional investors, who hold approximately 40.8% of shares. The largest shareholder is GAMCO INVESTORS, INC. ET AL with a 11.86% stake. Company insiders hold 30.88%. Data sourced from SEC Form 13F as of September 30, 2025.