ZeroStack Corp. (ZSTK)
Nasdaq: ZSTK · Wholesale-Drugs, Proprietaries & Druggists' Sundries · Toronto · filing with the SEC since 2019
Who owns ZeroStack Corp.
As filed with the SECHolders of 5% or more
6
Reis-Faria Daniel holds 37.5% of Common Shares, no par value, as its SCHEDULE 13D/A filed Jul 21, 2026 says.
Directors and officers
10
report now, of 26 people on the record since 2023. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 6 named at left.
Holders of 5% or moreshare of the class, as filed
Reis-Faria Daniel
SCHEDULE 13D/A · filed Jul 21, 2026 · Common Shares, no par value · 88.3% in Dec 23, 2025
Heinrich Michael
SCHEDULE 13D/A · filed Jul 21, 2026 · Common Shares, no par value · 10% in Apr 2, 2026
Starke Clifford
SCHEDULE 13D/A · filed Jul 21, 2025 · Common Shares, no par value
Alexander Pack
SCHEDULE 13G · filed Oct 19, 2026 · Common Stock, $0.0001 par value per share
Blockcat Pte. Ltd.
SCHEDULE 13G · filed Sep 4, 2026 · Common Shares, No Par Value
Puple AI Inc.
SCHEDULE 13G · filed Sep 2, 2026 · Common Shares, No Par Value
Highbridge Capital Management, LLC
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Shares, no par value · reported falling below 5%, from 5.1% in May 2, 2025
Vaiman Dany
SCHEDULE 13D/A · filed Jul 21, 2026 · Common Shares, no par value · reported falling below 5%, from 23.8% in Dec 23, 2025
Empery Asset Management, LP
SCHEDULE 13G/A · filed Apr 29, 2025 · Common Shares, no par value per share · reported falling below 5%, from 5.36% in Jan 21, 2025
What ZSTK reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Cannabis Business
An entity · legal entity · owns, named in the 10-K filed Feb 27, 2026
Insolvent Subsidiaries
An entity · consolidated entity · owns, named in the 10-K filed Feb 27, 2026
United Beverage Distribution Inc.
A company bought · acquisition · owns, named in the 10-K filed Feb 27, 2026
2 subsidiaries in 2 countries, from the list filed with the 10-K filed Feb 27, 2026.
Insider tradesForm 4
1sales
1purchases
0sales on a scheduled plan
1people selling
$0sold, in dollars
$3.5Mbought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 26 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Heinrich Michael | Executive Chairman | 0 | $0 | 0 | 1 | $3.5M |
| Rong Rudy | President | 1 | $0 | 0 | 0 | $0 |