Knopper Douglas S — SEC Form 4 filings
SEC reporting owner CIK 1350876. 6 Form 4 filings on record with FilingPulse; latest filed 2026-09-18.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2024-06-13 to 2026-09-18. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 4 legs across 4 filings — 122,777 shares, $2,674,662 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 3.
- Largest priced transaction: sale of 37,337 shares @ $26.28 ($981,216) in MAGNITE, INC., filed 2026-09-18.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MAGNITE, INC. (MGNI) | Director | 6 | — | 4 legs · 122,777 sh · $2,674,662 | 3 |
Form 4 filings — Knopper Douglas S
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-18 | 4 | MAGNITE, INC. (MGNI) | Sale (S): 37,337 @ $26.28 | EDGAR |
| 2026-08-07 | 4 | MAGNITE, INC. (MGNI) | Sale (S): 37,337 @ $22.72 | EDGAR |
| 2026-06-17 | 4 | MAGNITE, INC. (MGNI) | Sale (S): 37,337 @ $18.10 | EDGAR |
| 2026-06-10 | 4 | MAGNITE, INC. (MGNI) | Grant/award (A): 13,798 @ $0 · Sale (S): 10,766 @ $15.73 | EDGAR |
| 2025-06-06 | 4 | MAGNITE, INC. (MGNI) | Grant/award (A): 10,766 @ $0 | EDGAR |
| 2024-06-13 | 4 | MAGNITE, INC. (MGNI) | Grant/award (A): 14,061 @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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