Mark F. Lamps Atkore Inc. (ATKR) insider trading activity

Mark F. Lamps is Pres. Safety & Infrastructure of Atkore Inc.. Currently has a direct ownership of 36,981 shares of ATKR, which is worth approximately $2.4 Million. The most recent transaction as insider was on Dec 17, 2025, when has been sold 68 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 37K

15.84% 3M change

7.94% 12M change

Total Value Held $2.4 Million

Mark F. Lamps Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Dec 17 2025	BUY Grant, award, or other acquisition	-	68 Added 0.18%	36,981 Common Stock
Nov 18 2025	SELL Payment of exercise price or tax liability	$68,550 $65.1 p/Share	1,053 Reduced 2.77%	36,913 Common Stock
Nov 17 2025	SELL Open market or private sale	$64,750 $64.75 p/Share	1,000 Reduced 3.23%	29,923 Common Stock
Nov 17 2025	BUY Grant, award, or other acquisition	-	8,043 Added 17.48%	37,966 Common Stock
Nov 13 2025	SELL Payment of exercise price or tax liability	$39,157 $64.83 p/Share	604 Reduced 1.92%	30,923 Common Stock
Nov 11 2025	SELL Payment of exercise price or tax liability	$25,848 $65.11 p/Share	397 Reduced 1.24%	31,527 Common Stock
Aug 29 2025	BUY Grant, award, or other acquisition	-	51 Added 0.16%	31,924 Common Stock

Aug 15 2025	SELL Open market or private sale	$59,370 $59.37 p/Share	1,000 Reduced 3.04%	31,872 Common Stock
May 28 2025	BUY Grant, award, or other acquisition	-	44 Added 0.13%	32,872 Common Stock
May 09 2025	SELL Open market or private sale	$69,160 $69.16 p/Share	1,000 Reduced 2.96%	32,828 Common Stock
Feb 28 2025	BUY Grant, award, or other acquisition	-	46 Added 0.14%	33,828 Common Stock
Feb 10 2025	SELL Open market or private sale	$32,500 $65.0 p/Share	500 Reduced 1.46%	33,760 Common Stock
Dec 16 2024	BUY Grant, award, or other acquisition	-	10 Added 0.03%	34,260 Common Stock
Nov 18 2024	BUY Grant, award, or other acquisition	-	5,914 Added 14.72%	34,249 Common Stock
Nov 16 2024	SELL Payment of exercise price or tax liability	$219,933 $88.97 p/Share	2,472 Reduced 8.02%	28,335 Common Stock
Nov 16 2024	BUY Grant, award, or other acquisition	-	4,164 Added 12.01%	30,516 Common Stock
Nov 13 2024	SELL Payment of exercise price or tax liability	$54,840 $92.48 p/Share	593 Reduced 2.18%	26,642 Common Stock
Nov 11 2024	SELL Payment of exercise price or tax liability	$37,334 $95.73 p/Share	390 Reduced 1.41%	27,235 Common Stock
Nov 11 2024	SELL Open market or private sale	$48,275 $96.55 p/Share	500 Reduced 1.78%	27,625 Common Stock
Aug 30 2024	BUY Grant, award, or other acquisition	-	18 Added 0.06%	28,125 Common Stock
Aug 12 2024	SELL Open market or private sale	$47,735 $95.47 p/Share	500 Reduced 1.75%	28,086 Common Stock
May 31 2024	BUY Grant, award, or other acquisition	-	11 Added 0.04%	28,107 Common Stock
May 14 2024	SELL Open market or private sale	$78,835 $157.67 p/Share	500 Reduced 1.72%	28,586 Common Stock
Mar 15 2024	BUY Grant, award, or other acquisition	-	10 Added 0.04%	28,096 Common Stock
Nov 22 2023	SELL Open market or private sale	$654,345 $130.66 p/Share	5,008 Reduced 14.69%	29,086 Common Stock

MFL

Mark F. Lamps

Pres. Safety & Infrastructure

Harvey, IL

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