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 66.8%. Over the past 90 days, insiders made 5 sales worth $34.0M.

Shares Outstanding

136.170M

Shares Float

89.447M

Insider Shares Owned

6.330M

Insider % Owned

4.6%

Institutional Shares Held

91.115M

Institutional % Held

66.8%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$34.0M total

Net Activity

Net Selling

Net Value (90d)

-$34.0M

ATI Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
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
Mar 9, 2026	David J Morehouse	—	SELL	6.609K	$154.25	$1.0M