ZeroStack Ownership & Insider Activity

ZeroStack (ZSTK) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 60.4% of shares outstanding. Institutional investors hold 0.8%. Over the past 90 days, insiders made 1 sale worth $8K.

Shares Outstanding

2.412M

Shares Float

2.395M

Insider Shares Owned

13.056M

Insider % Owned

60.4%

Institutional Shares Held

181.109K

Institutional % Held

0.8%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$8K total

Net Activity

Net Selling

Net Value (90d)

-$8K

ZeroStack Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 19, 2026	Rudy Rong	PRESIDENT	SELL	1.000K	$7.57	$8K
Jul 20, 2026	Michael Heinrich	EXECUTIVE CHAIRMAN	BUY	4.609M	$0.75	$3.5M