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Who

Laurence Zeifman

Director

Company insider

Files Form 4 as: Director, ZeroStack; Director, SusGlobal Energy.

In numbers

Trades disclosed
3
Buys
0
Sells
0
Bought
$0
Sold
$0
Companies
2
Companies where not an officer
2
First trade
2 Apr 2019
Last trade
5 May 2026
Last filed
7 May 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
ZSTK ZeroStackDirector · Health Care Distribution · last 5 May 20260 buys · 0 sells
SusGlobal EnergyDirector · last 2 Apr 20190 buys · 0 sells

Activity over time

Not enough dated trades to draw.

Every trade

TradedCompanyWhatAmount
5 May 2026filed 7 May 2026ZSTK ZeroStackoption or derivative · Health Care DistributionSEC FORM 4 Code A—28,000 at $0.00filing
5 May 2026filed 7 May 2026ZSTK ZeroStackoption or derivative · Health Care DistributionSEC FORM 4 Code A—28,000 at $0.00filing
2 Apr 2019filed 4 Apr 2019SusGlobal EnergySEC FORM 4 Code A—20,000filing

News

No headline names them, or the companies they trade most, lately.

Sectors

No trade we could place in a sector.

Related people

Rudy RongPresident · President at ZeroStack, filing Form 4 there in the last year
Daniel Reis-FariaCEO · CEO at ZeroStack, filing Form 4 there in the last year
Michael HeinrichExecutive Chairman · Executive Chairman at ZeroStack, filing Form 4 there in the last year
Dany VaimanCFO · CFO at ZeroStack, filing Form 4 there in the last year
Manfred LeventhalDirector · Director at ZeroStack, filing Form 4 there in the last year