Magnite, Inc. (MGNI) Insider Trading
Directors, officers and holders of more than 10% of MGNI report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 323 transactions on file: 0 with code P, 29 with code S and 21 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 12, 2026 | Caine Paul | Director | S Sale | 12,500 | $25.29 | $316,125 |
| Oct 1, 2026 | Gephart Brian | CHIEF FINANCIAL OFFICER | A Award | 64,682 | Not measured | Not measured |
| Oct 1, 2026 | Sullivan Haas | CHIEF ACCOUNTING OFFICER | A Award | 24,641 | Not measured | Not measured |
| Sep 17, 2026 | Knopper Douglas S | Director | S Sale | 37,337 | $26.28 | $981,216 |
| Sep 17, 2026 | Caine Paul | Director | S Sale | 7,500 | $26.50 | $198,750 |
| Sep 14, 2026 | Spillane Robert F | Director | M Exercise | 10,363 | $5.17 | $53,577 |
| Sep 14, 2026 | Spillane Robert F | Director | S Sale | 10,363 | $23.76 | $246,225 |
| Sep 14, 2026 | Spillane Robert F | Director | M Exercise | 10,363 | Not measured | Not measured |
| Sep 14, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 1,165 | $24.00 | $27,960 |
| Sep 11, 2026 | Evans Katie Seitz | See Remarks | S Sale | 13,997 | $24.00 | $335,928 |
| Sep 10, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | S Sale | 40,000 | $23.41 | $936,400 |
| Sep 10, 2026 | Caine Paul | Director | S Sale | 5,000 | $23.53 | $117,650 |
| Sep 9, 2026 | Evans Katie Seitz | See Remarks | S Sale | 11,100 | $23.46 | $260,406 |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | M Exercise | 13,546 | Not measured | Not measured |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | S Sale | 32,285 | $23.63 | $762,895 |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | M Exercise | 13,546 | $5.16 | $69,897 |
| Sep 2, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 1,043 | $25.00 | $26,075 |
| Sep 1, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 5,371 | $23.42 | $125,789 |
| Aug 28, 2026 | Harden Sarah Patricia | Director | S Sale | 18,436 | $24.00 | $442,464 |
| Aug 26, 2026 | Harden Sarah Patricia | Director | S Sale | 30,550 | $23.31 | $712,121 |
| Aug 18, 2026 | Buckley Sean Patrick | See Remarks | S Sale | 2,759 | $25.00 | $68,975 |
| Aug 17, 2026 | Buckley Sean Patrick | See Remarks | S Sale | 8,271 | $24.31 | $201,068 |
| Aug 15, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | F Tax Payment | 8,102 | $24.73 | $200,362 |
| Aug 15, 2026 | Day David | CHIEF FINANCIAL OFFICER | F Tax Payment | 14,170 | $24.73 | $350,424 |
| Aug 15, 2026 | BARRETT MICHAEL G. | CEO | F Tax Payment | 10,404 | $24.73 | $257,291 |
| Aug 15, 2026 | Evans Katie Seitz | See Remarks | F Tax Payment | 11,204 | $24.73 | $277,075 |
| Aug 15, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | F Tax Payment | 5,627 | $24.73 | $139,156 |
| Aug 15, 2026 | Gephart Brian | CHIEF FINANCIAL OFFICER | F Tax Payment | 3,789 | $24.73 | $93,702 |
| Aug 15, 2026 | Buckley Sean Patrick | See Remarks | F Tax Payment | 11,715 | $24.73 | $289,712 |
| Aug 14, 2026 | Caine Paul | Director | S Sale | 7,500 | $25.00 | $187,500 |
| Aug 13, 2026 | Day David | CHIEF FINANCIAL OFFICER | G Gift | 26,258 | Not measured | Not measured |
| Aug 10, 2026 | Lam Rachel | Director | S Sale | 10,000 | $24.16 | $241,600 |
| Aug 10, 2026 | Caine Paul | Director | S Sale | 5,000 | $24.35 | $121,750 |
| Aug 10, 2026 | Gephart Brian | CHIEF FINANCIAL OFFICER | S Sale | 12,479 | $24.68 | $307,982 |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 2,602 | $24.00 | $62,448 |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 4,176 | $22.81 | $95,255 |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | S Sale | 20,000 | $24.00 | $480,000 |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | S Sale | 871 | $25.00 | $21,775 |
| Aug 6, 2026 | BARRETT MICHAEL G. | CEO | S Sale | 293,968 | $22.72 | $6,678,953 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | M Exercise | 28,703 | Not measured | Not measured |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | M Exercise | 20,000 | $5.16 | $103,200 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | S Sale | 19,237 | $23.00 | $442,451 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | M Exercise | 28,703 | $13.90 | $398,972 |
| Aug 6, 2026 | BARRETT MICHAEL G. | CEO | M Exercise | 293,968 | $5.80 | $1,705,014 |
| Aug 6, 2026 | Knopper Douglas S | Director | S Sale | 37,337 | $22.72 | $848,297 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | S Sale | 47,942 | $25.09 | $1,202,865 |
| Aug 6, 2026 | BARRETT MICHAEL G. | CEO | M Exercise | 293,968 | Not measured | Not measured |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | M Exercise | 20,000 | Not measured | Not measured |
| Jul 15, 2026 | BARRETT MICHAEL G. | CEO | M Exercise | 38,596 | $5.80 | $223,857 |
| Jul 15, 2026 | BARRETT MICHAEL G. | CEO | S Sale | 38,596 | $20.35 | $785,429 |
The full Form 4 history is on the MGNI company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.