Louis Berkman Investment CO (CIK 0001351834)

Latest company ownership

AP - AMPCO PITTSBURGH CORP
Role: 10% Owner
Shares held
3,127,792
Last filed at
Nov 26, 2025
Confidence Score
78.1
2025Q4
Confidence Score History
2007Q4 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Nov 17, 2025 Nov 26, 2025 AMPCO PITTSBURGH CORP 10% Owner Buy 87.5 +93,000 3.06% ✗ $248.3K
Nov 21, 2022 Nov 23, 2022 AMPCO PITTSBURGH CORP 10% Owner Buy 100.0 +551,604 22.21% ✗ $1.4M
May 23, 2019 May 28, 2019 AMPCO PITTSBURGH CORP 10% Owner Buy 61.3 +4,745 0.36% ✗ $20.6K
May 22, 2019 May 23, 2019 AMPCO PITTSBURGH CORP 10% Owner Buy 68.8 +10,000 0.77% ✗ $43.1K
May 21, 2019 May 22, 2019 AMPCO PITTSBURGH CORP 10% Owner Buy 68.8 +10,000 0.77% ✗ $43.1K
May 20, 2019 May 21, 2019 AMPCO PITTSBURGH CORP 10% Owner Sell 52.5 -1,500 -0.12% ✗ $6.7K
May 16, 2019 May 21, 2019 AMPCO PITTSBURGH CORP 10% Owner Sell 43.8 -9,811 -0.38% ✗ $42.3K
May 15, 2019 May 21, 2019 AMPCO PITTSBURGH CORP 10% Owner Sell 43.8 -10,000 -0.26% ✗ $40.1K
Mar 16, 2019 May 20, 2019 AMPCO PITTSBURGH CORP 10% Owner Sell 43.8 -9,811 -0.38% ✗ $42.3K
Mar 15, 2019 May 17, 2019 AMPCO PITTSBURGH CORP 10% Owner Sell 43.8 -10,000 -0.26% ✗ $40.1K
Jul 30, 2018 Jul 31, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 58.8 -100 -0.01% ✓ $1.1K
May 31, 2018 Jun 1, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 56.3 -679 -0.05% ✓ $7.5K
Apr 24, 2018 Apr 25, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -1,767 -0.14% ✓ $19.4K
Apr 23, 2018 Apr 24, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 52.5 -3,800 -0.30% ✓ $42.3K
Apr 20, 2018 Apr 23, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -6,200 -0.48% ✓ $69.6K
Apr 19, 2018 Apr 20, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -7,103 -0.55% ✓ $79.8K
Apr 18, 2018 Apr 19, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -8,486 -0.65% ✓ $94.7K
Apr 17, 2018 Apr 18, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -8,100 -0.62% ✓ $89.1K
Apr 10, 2018 Apr 11, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -988 -0.08% ✓ $10.9K
Apr 9, 2018 Apr 10, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,716 -0.36% ✓ $51.9K
Mar 16, 2018 Mar 19, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 52.5 -4,363 -0.33% ✓ $48K
Mar 14, 2018 Mar 15, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 58.8 -532 -0.04% ✓ $5.9K
Mar 13, 2018 Mar 14, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 56.3 -800 -0.06% ✓ $8.9K
Mar 12, 2018 Mar 13, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -14,411 -1.08% ✓ $160.3K
Mar 9, 2018 Mar 12, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,840 -0.36% ✓ $53.5K
Mar 8, 2018 Mar 9, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,000 -0.07% ✓ $11K
Mar 7, 2018 Mar 8, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -10,566 -0.78% ✓ $116.8K
Mar 5, 2018 Mar 6, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -2,300 -0.17% ✓ $25.3K
Mar 2, 2018 Mar 5, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -1,393 -0.10% ✓ $15.3K
Feb 28, 2018 Mar 1, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 58.8 -26 0.00% ✓ $286
Feb 27, 2018 Feb 28, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,708 -0.35% ✓ $51.8K
Feb 26, 2018 Feb 27, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -1,642 -0.12% ✓ $18.1K
Feb 23, 2018 Feb 26, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -3,100 -0.23% ✓ $34.3K
Feb 22, 2018 Feb 23, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -2,803 -0.20% ✓ $30.9K
Feb 21, 2018 Feb 22, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -7,621 -0.55% ✓ $84K
Feb 20, 2018 Feb 21, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -3,194 -0.23% ✓ $35.2K
Feb 16, 2018 Feb 20, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -10,100 -0.73% ✓ $111.9K
Feb 12, 2018 Feb 13, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,064 -0.08% ✓ $11.9K
Feb 9, 2018 Feb 12, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -20,097 -1.42% ✓ $226K
Feb 8, 2018 Feb 9, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,289 -0.37% ✓ $61.8K
Feb 7, 2018 Feb 8, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -2,532 -0.18% ✓ $30.5K
Feb 6, 2018 Feb 7, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 47.5 -7,267 -0.51% ✓ $90.2K
Feb 5, 2018 Feb 6, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -2,800 -0.20% ✓ $36.5K
Feb 2, 2018 Feb 5, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -1,513 -0.11% ✓ $19.9K
Feb 1, 2018 Feb 2, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,237 -0.09% ✓ $16.7K
Jan 31, 2018 Feb 1, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,226 -0.09% ✓ $16.6K
Jan 30, 2018 Jan 31, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 53.8 -2,014 -0.14% ✓ $28.4K
Jan 29, 2018 Jan 30, 2018 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,158 -0.08% ✓ $17.2K
Jan 19, 2010 Jan 21, 2010 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -9,601 -0.66% ✓ $308.7K
Jan 15, 2010 Jan 19, 2010 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,100 -0.35% ✓ $164.3K
Jan 8, 2010 Jan 12, 2010 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -1,600 -0.11% ✓ $51.3K
Jan 4, 2010 Jan 7, 2010 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,000 -0.34% ✓ $160.7K
Dec 29, 2009 Jan 7, 2010 AMPCO PITTSBURGH CORP 10% Owner Sell 36.3 -35,400 -2.37% ✓ $1.1M
Sep 3, 2008 Jan 27, 2009 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,500 -0.28% ✓ $181.2K
Sep 3, 2008 Jan 27, 2009 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,800 -0.24% ✓ $155.3K
Sep 3, 2008 Jan 27, 2009 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -1,700 -0.11% ✓ $68.7K
Sep 17, 2008 Sep 18, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -9,900 -0.66% ✓ $291.1K
Sep 16, 2008 Sep 17, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.66% ✓ $313.3K
Sep 15, 2008 Sep 16, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.65% ✓ $322.4K
Sep 12, 2008 Sep 16, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.65% ✓ $336.9K
Sep 11, 2008 Sep 12, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.64% ✓ $336K
Sep 10, 2008 Sep 11, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.64% ✓ $340.2K
Sep 9, 2008 Sep 11, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.64% ✓ $329.3K
Sep 8, 2008 Sep 9, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.63% ✓ $351.4K
Sep 5, 2008 Sep 9, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 45.0 -10,000 -0.63% ✓ $365.9K
Sep 4, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -2,700 -0.17% ✓ $103.6K
Sep 4, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,000 -0.25% ✓ $151.2K
Sep 4, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,300 -0.21% ✓ $123.5K
Sep 3, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -1,700 -0.11% ✓ $68.7K
Sep 3, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,800 -0.24% ✓ $155.3K
Sep 3, 2008 Sep 5, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,500 -0.28% ✓ $181.2K
Sep 2, 2008 Sep 4, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -2,700 -0.17% ✓ $110.9K
Sep 2, 2008 Sep 4, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,800 -0.24% ✓ $160.1K
Sep 2, 2008 Sep 4, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,500 -0.22% ✓ $147.5K
Jan 17, 2008 Jan 18, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 51.3 -1,600 -0.10% ✓ $56.4K
Jan 17, 2008 Jan 18, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,500 -0.22% ✓ $117.4K
Jan 17, 2008 Jan 18, 2008 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,512 -0.22% ✓ $113.8K
Dec 13, 2007 Dec 17, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -1,800 -0.11% ✓ $64.3K
Dec 13, 2007 Dec 17, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,838 -0.36% ✓ $207K
Dec 12, 2007 Dec 14, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 55.0 -1,300 -0.08% ✓ $47.5K
Dec 12, 2007 Dec 14, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,500 -0.28% ✓ $162.5K
Dec 12, 2007 Dec 14, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,200 -0.26% ✓ $149.4K
Dec 11, 2007 Dec 13, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 51.3 -1,500 -0.09% ✓ $55K
Dec 11, 2007 Dec 13, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,800 -0.29% ✓ $174.4K
Dec 11, 2007 Dec 13, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,700 -0.22% ✓ $131.1K
Dec 10, 2007 Dec 11, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -4,000 -0.24% ✓ $147.2K
Dec 10, 2007 Dec 11, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -6,000 -0.36% ✓ $219.4K
Dec 7, 2007 Dec 11, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 57.5 -400 -0.02% ✓ $15.3K
Dec 7, 2007 Dec 11, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,200 -0.25% ✓ $157.2K
Dec 7, 2007 Dec 11, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,400 -0.32% ✓ $199.3K
Dec 6, 2007 Dec 10, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -2,600 -0.16% ✓ $97.7K
Dec 6, 2007 Dec 10, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,600 -0.21% ✓ $132.9K
Dec 6, 2007 Dec 10, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,800 -0.23% ✓ $136.8K
Dec 5, 2007 Dec 7, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -3,400 -0.20% ✓ $119.2K
Dec 5, 2007 Dec 7, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -6,600 -0.39% ✓ $229.3K
Dec 4, 2007 Dec 6, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 50.0 -2,100 -0.12% ✓ $70.8K
Dec 4, 2007 Dec 6, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 46.3 -7,900 -0.46% ✓ $264.9K
Dec 3, 2007 Dec 4, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 57.5 -700 -0.04% ✓ $24.7K
Dec 3, 2007 Dec 4, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -4,300 -0.25% ✓ $150.4K
Dec 3, 2007 Dec 4, 2007 AMPCO PITTSBURGH CORP 10% Owner Sell 48.8 -5,000 -0.29% ✓ $171.9K