Magnite, Inc. also files under RUBI; those filings are included.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 11, 2026 | Evans Katie Seitz | See Remarks | Sell(S) | 14K | $24.00 | $336K |
| Sep 10, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | Sell(S) | 40K | $23.41 | $936K |
| Sep 10, 2026 | Caine Paul | Director | Sell(S) | 5K | $23.53 | $118K |
| Sep 9, 2026 | Evans Katie Seitz | See Remarks | Sell(S) | 11K | $23.46 | $260K |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | Option exercise(M) | 14K | — | $0 |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | Sell(S) | 32K | $23.63 | $763K |
| Sep 8, 2026 | Evans Katie Seitz | See Remarks | Option exercise(M) | 14K | $5.16 | $70K |
| Sep 2, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 1K | $25.00 | $26K |
| Sep 1, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 5K | $23.42 | $126K |
| Aug 28, 2026 | Harden Sarah Patricia | Director | Sell(S) | 18K | $24.00 | $442K |
| Aug 26, 2026 | Harden Sarah Patricia | Director | Sell(S) | 31K | $23.31 | $712K |
| Aug 18, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 3K | $25.00 | $69K |
| Aug 17, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 8K | $24.31 | $201K |
| Aug 15, 2026 | Barrett Michael G. | CEO, Director | Tax withholding(F) | 10K | $24.73 | $257K |
| Aug 15, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding(F) | 6K | $24.73 | $139K |
| Aug 15, 2026 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding(F) | 14K | $24.73 | $350K |
| Aug 15, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding(F) | 8K | $24.73 | $200K |
| Aug 15, 2026 | Evans Katie Seitz | See Remarks | Tax withholding(F) | 11K | $24.73 | $277K |
| Aug 15, 2026 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding(F) | 4K | $24.73 | $94K |
| Aug 15, 2026 | Buckley Sean Patrick | See Remarks | Tax withholding(F) | 12K | $24.73 | $290K |
| Aug 14, 2026 | Caine Paul | Director | Sell(S) | 8K | $25.00 | $188K |
| Aug 13, 2026 | Day David | CHIEF FINANCIAL OFFICER | Gift(G) | 26K | — | $0 |
| Aug 10, 2026 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Sell(S) | 12K | $24.68 | $308K |
| Aug 10, 2026 | Caine Paul | Director | Sell(S) | 5K | $24.35 | $122K |
| Aug 10, 2026 | Lam Rachel | Director | Sell(S) | 10K | $24.16 | $242K |
| Aug 6, 2026 | Barrett Michael G. | CEO, Director | Sell(S) | 294K | $22.72 | $6.7M |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 48K | $25.09 | $1.2M |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 19K | $23.00 | $442K |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | Sell(S) | 20K | $24.00 | $480K |
| Aug 6, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 294K | $5.80 | $1.7M |
| Aug 6, 2026 | Knopper Douglas S | Director | Sell(S) | 37K | $22.72 | $848K |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | Option exercise(M) | 20K | $5.16 | $103K |
| Aug 6, 2026 | Evans Katie Seitz | See Remarks | Option exercise(M) | 20K | — | $0 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Option exercise(M) | 29K | $13.90 | $399K |
| Aug 6, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 294K | — | $0 |
| Aug 6, 2026 | Buckley Sean Patrick | See Remarks | Option exercise(M) | 29K | — | $0 |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 4K | $22.81 | $95K |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 3K | $24.00 | $62K |
| Aug 6, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 871 | $25.00 | $22K |
| Jul 15, 2026 | Barrett Michael G. | CEO, Director | Sell(S) | 39K | $20.35 | $785K |
| Jul 15, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 39K | $5.80 | $224K |
| Jul 15, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 39K | — | $0 |
| Jul 10, 2026 | Caine Paul | Director | Sell(S) | 5K | $20.64 | $103K |
| Jul 7, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 1K | $21.00 | $26K |
| Jul 7, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 19K | $21.03 | $404K |
| Jul 1, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 9K | $20.00 | $188K |
| Jun 29, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 75K | $5.80 | $435K |
| Jun 29, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 75K | — | $0 |
| Jun 29, 2026 | Barrett Michael G. | CEO, Director | Sell(S) | 75K | $19.50 | $1.5M |
| Jun 17, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 1K | $19.00 | $27K |
| Jun 17, 2026 | Buckley Sean Patrick | See Remarks | Sell(S) | 19K | $19.00 | $365K |
| Jun 16, 2026 | Barrett Michael G. | CEO, Director | Sell(S) | 100K | $17.50 | $1.8M |
| Jun 16, 2026 | Knopper Douglas S | Director | Sell(S) | 37K | $18.10 | $676K |
| Jun 16, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 100K | — | $0 |
| Jun 16, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 100K | $5.80 | $580K |
| Jun 16, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 11K | $18.00 | $202K |
| Jun 15, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 179K | $5.80 | $1.0M |
| Jun 15, 2026 | Barrett Michael G. | CEO, Director | Sell(S) | 179K | $16.59 | $3.0M |
| Jun 15, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 179K | — | $0 |
| Jun 15, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 1K | $17.00 | $18K |
| Jun 10, 2026 | Knopper Douglas S | Director | Sell(S) | 11K | $15.73 | $169K |
| Jun 10, 2026 | Pearson David T. | Director | Sell(S) | 11K | $15.65 | $168K |
| Jun 8, 2026 | Yu Diane | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Lam Rachel | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Caine Paul | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Knopper Douglas S | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Harden Sarah Patricia | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Pearson David T. | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Rossman James | Director | Grant(A) | 14K | — | $0 |
| Jun 8, 2026 | Spillane Robert F | Director | Grant(A) | 14K | — | $0 |
| Jun 1, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell(S) | 1K | $15.00 | $21K |
| May 19, 2026 | Spillane Robert F | Director | Sell(S) | 10K | $13.33 | $133K |
| May 15, 2026 | Barrett Michael G. | CEO, Director | Tax withholding(F) | 10K | $12.82 | $133K |
| May 15, 2026 | Buckley Sean Patrick | President, Revenue | Tax withholding(F) | 12K | $12.82 | $154K |
| May 15, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding(F) | 8K | $12.82 | $107K |
| May 15, 2026 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding(F) | 14K | $12.82 | $182K |
| May 15, 2026 | Evans Katie Seitz | President, Operations | Tax withholding(F) | 11K | $12.82 | $144K |
| May 15, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding(F) | 6K | $12.82 | $72K |
| May 15, 2026 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding(F) | 4K | $12.82 | $49K |
| Feb 18, 2026 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Sell(S) | 22K | $12.00 | $258K |
| Feb 15, 2026 | Evans Katie Seitz | President, Operations | Tax withholding(F) | 27K | $11.70 | $321K |
| Feb 15, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding(F) | 17K | $11.70 | $201K |
| Feb 15, 2026 | Buckley Sean Patrick | President, Revenue | Tax withholding(F) | 27K | $11.70 | $315K |
| Feb 15, 2026 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding(F) | 31K | $11.70 | $358K |
| Feb 15, 2026 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding(F) | 13K | $11.70 | $149K |
| Feb 15, 2026 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding(F) | 6K | $11.70 | $72K |
| Feb 15, 2026 | Barrett Michael G. | CEO, Director | Tax withholding(F) | 24K | $11.70 | $276K |
| Feb 15, 2026 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Tax withholding(F) | 19K | $11.70 | $222K |
| Jan 9, 2026 | Barrett Michael G. | CEO, Director | Option exercise(M) | 214K | — | $0 |
| Jan 9, 2026 | Evans Katie Seitz | President, Operations | Option exercise(M) | 51K | — | $0 |
| Jan 9, 2026 | Evans Katie Seitz | President, Operations | Option exercise(M) | 51K | — | $0 |
| Jan 9, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Option exercise(M) | 23K | — | $0 |
| Jan 9, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding(F) | 12K | $16.17 | $199K |
| Jan 9, 2026 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Option exercise(M) | 23K | — | $0 |
| Jan 9, 2026 | Evans Katie Seitz | President, Operations | Tax withholding(F) | 27K | $16.17 | $434K |
| Jan 9, 2026 | Buckley Sean Patrick | President, Revenue | Option exercise(M) | 64K | — | $0 |
| Jan 9, 2026 | Buckley Sean Patrick | President, Revenue | Option exercise(M) | 64K | — | $0 |
| Jan 9, 2026 | Buckley Sean Patrick | President, Revenue | Tax withholding(F) | 30K | $16.17 | $491K |
| Jan 9, 2026 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding(F) | 35K | $16.17 | $569K |
| Jan 9, 2026 | Day David | CHIEF FINANCIAL OFFICER | Option exercise(M) | 73K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Magnite, Inc., SEC CIK 0001595974. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under MGNI and shows every filing by that issuer (also filed as RUBI).
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-12. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MGNI