Louis Berkman Investment Co

10% OWNER · AMPCO PITTSBURGH CORP · CIK 0001351834

FILING MIX · LIFETIME80%/20%

BUYS

SELLS

TOTAL VALUE

$1.63M

COMPANIES

ACTIVE SINCE

Sep 2020

HOLDINGS NOW

3,127,792

AVG SELL PX

—

Trades · vs SPY

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Performance · forward returns vs SPY

2 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →

Forward-return performance of every backtestable P/S trade by Louis Berkman Investment Co, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.

HORIZON	TRADES	WIN RATE	INSIDER RETURN	SPY RETURN	MEAN EXCESS	MEDIAN EXCESS	T-STAT
7d	2	+50.00%	+3.69%	+0.40%	+3.30%	+3.30%	—
14d	2	+50.00%	+1.91%	+1.73%	+0.17%	+0.17%	—
30d	2	+50.00%	+10.60%	-0.41%	+11.00%	+11.00%	—
60d	2	+100.00%	+63.25%	+2.35%	+60.91%	+60.91%	—
90d	2	+100.00%	+96.25%	+3.05%	+93.19%	+93.19%	—
180d	2	+100.00%	+157.76%	+9.25%	+148.51%	+148.51%	—
1y	2(1 pending)	+0.00%	-4.36%	+16.68%	-21.04%	-21.04%	—
2y	2(1 pending)	+0.00%	-36.36%	+54.06%	-90.42%	-90.42%	—

How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.

Holdings over time

AP · 3,127,792 shares · as of Nov 17, 2025

Trading cadence · quarterly flow

BUY ● SELL ●

2020

2021

2022

2023

2024

2025

FLOW · 4 buys / 1 sellsCOVERAGE · 22 quarters

Form 4 filings · all activity

COMPANY	TYPE	SHARES	PRICE	VALUE	HELD AFTER	TRADE DATE	FILED	DETAILS
AP AMPCO PITTSBURGH CORP	PURCHASE	93,000	$2.67	$248.3K	3,127,792	Nov 17, 2025	Nov 26, 2025 ↗	View →
AP AMPCO PITTSBURGH CORP	PURCHASE	551,604	$2.50	$1.38M	3,034,793	Nov 21, 2022	Nov 23, 2022 ↗	View →
AP AMPCO PITTSBURGH CORP	PURCHASE	1,161,427	—	—	2,483,189	Sep 16, 2020	Sep 18, 2020 ↗	View →
AP AMPCO PITTSBURGH CORP	SALE	2,601,762	—	—	0	Sep 16, 2020	Sep 18, 2020 ↗	View →
AP AMPCO PITTSBURGH CORP	PURCHASE	1,161,427	—	—	1,161,427	Sep 16, 2020	Sep 18, 2020 ↗	View →

Other insiders · AP

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About this filer

CIK 0001351834

ROLE

10% Owner

PRIMARY

COMPANIES

ACTIVE SINCE

Sep 2020

MARKETPEEL · /INSIDER/0001351834DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE

Louis Berkman Investment Co

The morning brief, before the bell.