SSTSystem1, Inc.

Insider trades (Form 4)

Directors, top managers and anyone owning more than 10% of a company must report every time they buy, sell or receive its shares, within two business days, on a Form 4. Here is what System1's insiders did over the last year, and what each kind of trade means.

Bought on the open market$80.7K1 trade by 1 person

Sold on the open market$00 trades by 0 people

Sales that were planned ahead–made under a pre-set trading plan (Rule 10b5-1)

Filings read17every Form 4 in the last year

Buying and selling, month by month

Open-market trades only, by value. Tap a month.

DecJanFebMarAprMayJunJulAugSepOctNov

■ above the line: bought · ■ below: sold

Who traded

Person and role	Bought	Sold	Shares held after
Tridivesh KidambiChief financial officer (Chief Financial Officer)	$80.7K	–	175.8K
Elizabeth SestanovichChief People Officer	–	–	51.9K
Brian CoppolaChief Ad Operations Officer	–	–	59.8K
Daniel J WeinrotChief lawyer (General Counsel & Secretary)	–	–	59.9K

Every trade (18)

Jul 15, 2026Shares kept back to pay taxElizabeth Sestanovich · Chief People OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−7,058 sharesat $2.60 = $18.4Kowns 51,890 after
Jul 15, 2026Shares kept back to pay taxBrian Coppola · Chief Ad Operations OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−6,124 sharesat $2.60 = $15.9Kowns 59,774 after
Jul 15, 2026Shares kept back to pay taxTridivesh Kidambi · Chief financial officer (Chief Financial Officer)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−6,022 sharesat $2.60 = $15.7Kowns 175,793 after
Jul 15, 2026Shares kept back to pay taxDaniel J Weinrot · Chief lawyer (General Counsel & Secretary)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−9,156 sharesat $2.60 = $23.8Kowns 59,897 after
May 29, 2026Received shares or options as payTridivesh Kidambi · Chief financial officer (Chief Financial Officer)A grant from the company as part of their pay, not a purchase. Form 4+35,300 sharesno price (not a sale)owns 181,815 after
Apr 15, 2026Bought shares on the open marketTridivesh Kidambi · Chief financial officer (Chief Financial Officer)They paid their own money at the market price. People often watch these most closely. Form 4+26,910 sharesat $3.00 = $80.7Kowns 146,816 after
Apr 15, 2026Shares kept back to pay taxTridivesh Kidambi · Chief financial officer (Chief Financial Officer)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−301 sharesat $2.26 = $680.26owns 146,515 after
Apr 15, 2026Shares kept back to pay taxElizabeth Sestanovich · Chief People OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−341 sharesat $2.26 = $770.66owns 58,948 after
Apr 15, 2026Shares kept back to pay taxBrian Coppola · Chief Ad Operations OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−331 sharesat $2.26 = $748.06owns 65,898 after
Apr 15, 2026Shares kept back to pay taxDaniel J Weinrot · Chief lawyer (General Counsel & Secretary)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−341 sharesat $2.26 = $770.66owns 69,053 after
Jan 28, 2026Shares kept back to pay taxTridivesh Kidambi · Chief financial officer (Chief Financial Officer)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−258 sharesat $4.18 = $1.1Kowns 119,906 after
Jan 28, 2026Shares kept back to pay taxElizabeth Sestanovich · Chief People OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−211 sharesat $4.18 = $881.98owns 59,289 after
Jan 28, 2026Shares kept back to pay taxBrian Coppola · Chief Ad Operations OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−231 sharesat $4.18 = $965.58owns 66,229 after
Jan 28, 2026Shares kept back to pay taxDaniel J Weinrot · Chief lawyer (General Counsel & Secretary)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−211 sharesat $4.18 = $881.98owns 69,394 after
Jan 15, 2026Shares kept back to pay taxTridivesh Kidambi · Chief financial officer (Chief Financial Officer)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−345 sharesat $4.40 = $1.5Kowns 120,164 after
Jan 15, 2026Shares kept back to pay taxElizabeth Sestanovich · Chief People OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−377 sharesat $4.40 = $1.7Kowns 59,500 after
Jan 15, 2026Shares kept back to pay taxBrian Coppola · Chief Ad Operations OfficerWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−371 sharesat $4.40 = $1.6Kowns 66,460 after
Jan 15, 2026Shares kept back to pay taxDaniel J Weinrot · Chief lawyer (General Counsel & Secretary)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−377 sharesat $4.40 = $1.7Kowns 69,605 after

Read straight from the Form 4 filings System1's directors, top managers and large owners sent to the SEC. Insiders sell for many reasons: taxes, diversifying, planned sales. Buying with their own money is rarer. None of this says whether to buy or sell the shares.

Finding insider trades…Reading each Form 4…Adding them up…

Who traded

Person and role	Bought	Sold	Shares held after
Tridivesh KidambiChief financial officer (Chief Financial Officer)	$80.7K	–	175.8K
Elizabeth SestanovichChief People Officer	–	–	51.9K
Brian CoppolaChief Ad Operations Officer	–	–	59.8K
Daniel J WeinrotChief lawyer (General Counsel & Secretary)	–	–	59.9K