ATI Ownership & Insider Activity

ATI (ATI) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 4.6% of shares outstanding. Institutional investors hold 72.5%. Over the past 90 days, insiders made 8 sales worth $27.5M.

Shares Outstanding

136.170M

Shares Float

89.447M

Insider Shares Owned

6.228M

Insider % Owned

4.6%

Institutional Shares Held

98.728M

Institutional % Held

72.5%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$27.5M total

Net Activity

Net Selling

Net Value (90d)

-$27.5M

ATI Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 21, 2026	Timothy J Harris	SENIOR VP AND CDIO	SELL	9.000K	$191.82	$1.7M
Sep 14, 2026	Timothy J Harris	SENIOR VP AND CDIO	SELL	16.500K	$193.06	$3.2M
Sep 8, 2026	Timothy J Harris	SENIOR VP AND CDIO	SELL	16.500K	$207.54	$3.4M
Sep 2, 2026	David J Morehouse	—	SELL	2.485K	$201.61	$501K
Aug 31, 2026	Timothy J Harris	SENIOR VP AND CDIO	SELL	16.500K	$210.01	$3.5M
Aug 24, 2026	Timothy J Harris	SENIOR VP AND CDIO	SELL	16.500K	$206.92	$3.4M
Aug 17, 2026	Kimberly A Fields	CHAIR, PRESIDENT AND CEO	SELL	24.845K	$231.19	$5.7M
Jul 28, 2026	Kimberly A Fields	CHAIR, PRESIDENT AND CEO	SELL	31.757K	$190.99	$6.1M
Jul 7, 2026	Kimberly A Fields	CHAIR, PRESIDENT AND CEO	SELL	40.000K	$182.91	$7.3M
Jun 22, 2026	Kimberly A Fields	CHAIR, PRESIDENT AND CEO	SELL	20.693K	$200.64	$4.2M
Jun 2, 2026	Kimberly A Fields	CHAIR, PRESIDENT AND CEO	SELL	59.749K	$179.07	$10.7M
May 11, 2026	Kimberly A Fields	PRESIDENT, CEO AND DIRECTOR	SELL	40.000K	$159.21	$6.4M