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Buonasera David
CHIEF TECHNOLOGY OFFICER
David Buonasera has served as Chief Technology Officer since March 2023. Prior to that Mr. Buonasera served as our Senior Vice President of Engineering for SpringServe since July 2021 and as head of Magnite CTV Streaming since September 2022. Previously, he helped found SpringServe in 2014 and served as its Chief Technology Officer from July 2014 to July 2021. His career also includes experience as Director of Optimization and Analytics, and Manager of Data Engineering at Appnexus from July 2009 to July 2014. Mr. Buonasera holds a Computer Science and Engineering degree from the University of Pennsylvania. David L. Day has served as our Chief Financial Officer since May 2016 and served as our Chief…
Biography from the company’s latest DEF 14A proxy statement
28Open-market trades
1Ticker
—Avg 90d after buys
−7.72%Avg 90d after sales
—Avg 180d after buys
+4.88%Avg 180d after sales
MGNI price and prints
Full MGNI chartMAGNITE, INC. 28 open-market prints by this insider, 5/16/2023 – 9/14/2026. Triangles mark only their Form 4 purchases and sales.
MGNI adjusted close▲ buy▼ sale
MGNI trades
| Date | Form 4 | Ticker | Side | Shares | Value | 90d | 180d |
|---|---|---|---|---|---|---|---|
| 9/14/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,165 | $28.0K | −7.72%hist | +4.88%hist |
| 9/2/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,043 | $26.1K | −7.72%hist | +4.88%hist |
| 9/1/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 5,371 | $125.8K | −7.72%hist | +4.88%hist |
| 8/6/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 4,176 | $95.3K | −7.72%hist | +4.88%hist |
| 8/6/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 2,602 | $62.4K | −7.72%hist | +4.88%hist |
| 8/6/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 871 | $21.8K | −7.72%hist | +4.88%hist |
| 7/7/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,224 | $25.7K | −7.72%hist | +4.88%hist |
| 7/1/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 9,376 | $187.5K | −7.72%hist | +4.88%hist |
| 6/17/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,409 | $26.8K | −30.0% | +4.88%hist |
| 6/16/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 11,233 | $202.2K | −28.5% | +4.88%hist |
| 6/15/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,057 | $18.0K | −42.3% | +4.88%hist |
| 6/1/2026 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,409 | $21.1K | −52.7% | +4.88%hist |
| 9/3/2025 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 2,950 | $74.8K | +41.3% | +44.7% |
| 8/18/2025 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 7,834 | $186.8K | +45.1% | +52.4% | |
| 6/30/2025 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 9,289 | $204.4K | +7.63% | +31.8% |
| 5/27/2025 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 8,742 | $139.9K | −57.3% | +8.45% |
| 5/23/2025 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 3,653 | $54.9K | −46.6% | +11.9% |
| 12/13/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,969 | $32.1K | +26.7% | −7.35% |
| 11/27/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 431 | $7.2K | −4.45% | +3.13% |
| 11/22/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 9,219 | $156.7K | −6.60% | +9.46% |
| 11/18/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 277 | $4.4K | −24.0% | +2.05% |
| 11/14/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 12,412 | $203.7K | −23.1% | +2.10% |
| 8/15/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 10,000 | $126.5K | −34.3% | −61.6% |
| 5/16/2024 | Form 410b5-1 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 5,500 | $68.8K | −4.42% | −35.9% |
| 9/6/2023 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 5,444 | $46.7K | +5.73% | −35.2% | |
| 8/16/2023 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 2,648 | $22.0K | +8.15% | −15.7% | |
| 7/3/2023 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 6,624 | $89.0K | +45.9% | +32.9% | |
| 5/16/2023 | MAGNITE, INC · Services-Computer Programming, Data Processing, Etc.IndustryServices-Computer Programming, Data Processing, Etc.Mkt cap (est.)$11.22BPrice$25.1552w high$25.6352w low$11.20 | SELL | 1,559 | $17.0K | +19.6% | +34.8% |
Chart uses split-adjusted closes from the first print through the latest available bar. Returns use the last close on or before the trade date and the first close on or after 90 and 180 calendar days. Sales are signed so a declining price is a positive result for the seller. Not investment advice.