Updated Jul 16, 2026 · Last SEC filing 2026-06-02
System1, Inc. (SST) has filed 5 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-02. 3 Form 8-K material event filings were reported by SST in the last 90 days. InsiderAlpha tracks every SST SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Services-Computer Programming, Data Processing, Etc. (SIC 7370) |
|---|---|
| SEC CIK | 0001805833 |
| Form 4 filings (90d) | 5 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Latest Form 4 filing | 2026-06-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Kidambi Tridivesh | Chief Financial Officer | A — Grant or award | 35.3K | $0.00 | — | SEC | |
| Sestanovich Elizabeth | Chief People Officer | F — Tax withholding / forfeiture | 341 | $2.26 | $771 | SEC | |
| Weinrot Daniel J | General Counsel & Secretary | F — Tax withholding / forfeiture | 341 | $2.26 | $771 | SEC | |
| Kidambi Tridivesh | Chief Financial Officer | P — Open-market purchase | 26.9K | $3.00 | $81K | SEC | |
| Coppola Brian | Chief Ad Operations Officer | F — Tax withholding / forfeiture | 331 | $2.26 | $748 | SEC | |
| Kidambi Tridivesh | Chief Financial Officer | F — Tax withholding / forfeiture | 301 | $2.26 | $680 | SEC | |
| Weinrot Daniel J | General Counsel & Secretary | F — Tax withholding / forfeiture | 211 | $4.18 | $882 | SEC | |
| Sestanovich Elizabeth | Chief People Officer | F — Tax withholding / forfeiture | 211 | $4.18 | $882 | SEC | |
| Coppola Brian | Chief Ad Operations Officer | F — Tax withholding / forfeiture | 231 | $4.18 | $966 | SEC | |
| Kidambi Tridivesh | Chief Financial Officer | F — Tax withholding / forfeiture | 258 | $4.18 | $1K | SEC | |
| Weinrot Daniel J | General Counsel & Secretary | F — Tax withholding / forfeiture | 377 | $4.40 | $2K | SEC | |
| Kidambi Tridivesh | Chief Financial Officer | F — Tax withholding / forfeiture | 345 | $4.40 | $2K | SEC | |
| Sestanovich Elizabeth | Chief People Officer | F — Tax withholding / forfeiture | 377 | $4.40 | $2K | SEC | |
| Coppola Brian | Chief Ad Operations Officer | F — Tax withholding / forfeiture | 371 | $4.40 | $2K | SEC | |
| Kidambi Tridivesh | Chief Financial Officer | F — Tax withholding / forfeiture | 352 | $7.94 | $3K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for System1, Inc. (SST). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Kidambi Tridivesh | 3 | $81K |
| Weinrot Daniel J | 1 | $771 |
| Sestanovich Elizabeth | 1 | $771 |
| Coppola Brian | 1 | $748 |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in SST insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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