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ZeroStack Corp.

ZSTK Net buying
CIK 0001790169 #4334 in the set updated 17 Sep 2026
Bought (12 mo)
$3.48M
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$7.57K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$7.57K
1 of 1 sales
Net
+$3.47M
+$3.47M against sales at will

By person

6 insiders · 3 transactions

There is no salary here to measure against. ZeroStack Corp.'s chief executive is paid a token, so dividing a holding by it says nothing.

Which is why this company is in neither direction of the chief executive filter on the transactions page. A stake that cannot be expressed as a multiple is not the same thing as a small one.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Heinrich Michael
Executive Chairman
$3.48M (1)
+$3.48M
4,608,575
$34.89M
Rong Rudy
President
$7.57K (1)
−$7.57K
0
$0.00
−100.0%
Reis-Faria Daniel
CEO
5,954,743
$45.08M
Starke Clifford
CEO
906,846
$6.86M
+13,146%
DORF SAMMY
Executive Chairman
250,000
$1.89M
WOO EDWARD
Director
134,698
$1.02M
+59.0%

No percentages here. This company's share count has moved by a factor of 30.4 over the window, from 741,261 to 22,568,653 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
Rong Rudy
19 Aug 2026
President
Sell
1,000
$7.57
$7.57K
Reis-Faria Daniel
20 Jul 2026
CEO
Exercised, kept
5,954,743
$0.00
$595.47
Heinrich Michael
20 Jul 2026
Executive Chairman
Buy indirect
4,608,575
$0.75
$3.48M

What was left out

Form 4 filings counted 14
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 5,954,743
History held since 21 Mar 2023