Kaiser Aluminum Ownership & Insider Activity

Kaiser Aluminum (KALU) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 5.5% of shares outstanding. Institutional investors hold 80.3%.

Shares Outstanding

16.349M

Shares Float

13.546M

Insider Shares Owned

897.673K

Insider % Owned

5.5%

Institutional Shares Held

13.136M

Institutional % Held

80.3%

Ownership Breakdown

Net Insider Activity by Month

Kaiser Aluminum Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Apr 29, 2026	Richard P Grimley	—	SELL	1.524K	$171.52	$261K
Apr 29, 2026	Keith Harvey	PRESIDENT & CEO	SELL	3.031K	$173.13	$525K
Apr 28, 2026	Neal West	EVP & CFO	SELL	5.000K	$173.29	$866K