Updated Jul 16, 2026
BARRETT MICHAEL G. has filed 4 SEC Form 4 filings across 2 companies in the last 90 days — selling. Lifetime open-market sales: $21.11M.

Michael G. Barrett is a corporate executive and director known for his roles in the media and advertising industries. He has served on the boards of OUTFRONT Media Inc. and MAGNITE, INC., contributing his expertise in business strategy and operations. Barrett has a background in technology and media, which has positioned him as a significant figure in the evolution of advertising platforms.
| Role | Insider |
|---|---|
| Notability | 70/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-01 | MGNI | MAGNITE, INC. | S — Open-market sale | 75.0K | $19.50 | $1.46M |
| 2026-07-01 | MGNI | MAGNITE, INC. | M — Option exercise | 75.0K | $5.80 | $435K |
| 2026-06-17 | MGNI | MAGNITE, INC. | S — Open-market sale | 100.0K | $17.50 | $1.75M |
| 2026-06-17 | MGNI | MAGNITE, INC. | M — Option exercise | 100.0K | $5.80 | $580K |
| 2026-06-17 | MGNI | MAGNITE, INC. | S — Open-market sale | 178.6K | $16.59 | $2.96M |
| 2026-06-17 | MGNI | MAGNITE, INC. | M — Option exercise | 178.6K | $5.80 | $1.04M |
| 2026-05-19 | MGNI | MAGNITE, INC. | F — Tax withholding / forfeiture | 10.4K | $12.82 | $133K |
| 2026-02-18 | MGNI | MAGNITE, INC. | F — Tax withholding / forfeiture | 23.5K | $11.70 | $276K |
| 2026-01-12 | MGNI | MAGNITE, INC. | F — Tax withholding / forfeiture | 109.7K | $16.17 | $1.77M |
| 2026-01-12 | MGNI | MAGNITE, INC. | M — Option exercise | 213.8K | $0.00 | |
| 2025-08-18 | MGNI | MAGNITE, INC. | S — Open-market sale | 36.0K | $23.85 | $857K |
| 2025-07-15 | MGNI | MAGNITE, INC. | S — Open-market sale | 70.9K | $23.27 | $1.65M |
| 2025-06-24 | MGNI | MAGNITE, INC. | S — Open-market sale | 300.0K | $20.01 | $6.00M |
| 2025-06-16 | MGNI | MAGNITE, INC. | S — Open-market sale | 30.0K | $19.00 | $570K |
| 2025-06-16 | MGNI | MAGNITE, INC. | S — Open-market sale | 45.0K | $17.76 | $799K |
| 2025-05-15 | MGNI | MAGNITE, INC. | F — Tax withholding / forfeiture | 13.1K | $15.88 | $208K |
| 2024-12-06 | MGNI | MAGNITE, INC. | S — Open-market sale [10b5-1] | 148.0K | $17.52 | $2.59M |
| 2024-11-27 | MGNI | MAGNITE, INC. | S — Open-market sale [10b5-1] | 27.0K | $17.63 | $476K |
| 2024-11-19 | MGNI | MAGNITE, INC. | S — Open-market sale [10b5-1] | 100.0K | $16.14 | $1.61M |
| 2024-11-19 | MGNI | MAGNITE, INC. | F — Tax withholding / forfeiture [10b5-1] | 9.6K | $15.85 | $153K |
Michael G. Barrett is a corporate executive and director known for his roles in the media and advertising industries. He has served on the boards of OUTFRONT Media Inc. and MAGNITE, INC., contributing his expertise in business strategy and operations. Barrett has a background in technology and media, which has positioned him as a significant figure in the evolution of advertisi…
4 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 0 open-market purchases () and 12 open-market sales ($21.11M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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