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David Buonasera

MGNI
CHIEF TECHNOLOGY OFFICER · MAGNITE, INC. · CIK 0001966857
FILING MIX · LIFETIME21%/79%
BUYS
9
SELLS
33
TOTAL VALUE
$3.24M
COMPANIES
1
ACTIVE SINCE
Feb 2023
HOLDINGS NOW
269,709
AVG SELL PX
$15.65
TRADE KIND
SHOWING 42 / 42
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
15 backtested trades · 8 horizons · 13 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by David Buonasera, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d15+46.67%+1.42%+0.57%+0.85%+1.04%—
14d15+40.00%+3.17%+1.19%+1.98%+3.01%—
30d15+60.00%+3.54%+1.61%+1.93%-2.25%—
60d15+53.33%+6.36%+3.53%+2.83%-3.22%—
90d15+46.67%+3.37%+4.10%-0.73%+1.24%—
180d15+66.67%-2.87%+7.56%-10.44%-2.48%—
1y15(2 pending)+69.23%+8.21%+19.57%-11.36%-27.27%—
2y15(11 pending)+0.00%+105.36%+47.09%+58.27%+67.59%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MGNI · 269,709 shares · as of Jul 1, 2026
082,891165,781248,672331,562202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
FLOW · 9 buys / 33 sellsCOVERAGE · 15 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
9,376$20.00$187.5K269,709Jul 1, 2026Jul 2, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
1,409$19.00$26.8K279,085Jun 17, 2026Jun 17, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
11,233$18.00$202.2K280,494Jun 16, 2026Jun 17, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
1,057$17.00$18.0K291,727Jun 15, 2026Jun 17, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
1,409$15.00$21.1K292,784Jun 1, 2026Jun 3, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
8,335$12.82$106.9K294,193May 15, 2026May 19, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
17,137$11.70$200.5K302,095Feb 15, 2026Feb 18, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF TECHNOLOGY OFFICER
22,935——331,562Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
12,330$16.17$199.4K319,232Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
22,935——0Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
76,803——308,627Jan 1, 2026Jan 5, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
25,801——25,801Jan 1, 2026Jan 5, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
7,129$14.15$100.9K231,824Nov 15, 2025Nov 18, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
2,950$25.37$74.8K238,629Sep 3, 2025Sep 4, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
7,834$23.85$186.8K241,579Aug 18, 2025Aug 20, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
9,289$22.00$204.4K249,413Jun 30, 2025Jul 2, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
8,742$16.00$139.9K258,702May 27, 2025May 28, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
3,653$15.03$54.9K267,444May 23, 2025May 28, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
8,038$15.88$127.6K271,097May 15, 2025May 16, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
17,384$20.00$347.7K278,795Feb 15, 2025Feb 19, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
24,366——24,366Jan 9, 2025Jan 13, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
72,384——296,179Jan 9, 2025Jan 13, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
1,969$16.31$32.1K223,795Dec 13, 2024Dec 13, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
431$16.78$7.2K225,764Nov 27, 2024Nov 27, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
9,219$17.00$156.7K226,195Nov 22, 2024Nov 26, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
277$15.77$4.4K235,414Nov 18, 2024Nov 19, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
5,056$15.85$80.1K235,691Nov 15, 2024Nov 19, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
12,412$16.41$203.7K240,403Nov 14, 2024Nov 15, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
5,287$13.79$72.9K252,815Sep 1, 2024Sep 4, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
10,000$12.65$126.5K258,102Aug 15, 2024Aug 16, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
3,760$12.51$47.0K268,102Aug 15, 2024Aug 16, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
5,500$12.50$68.8K271,862May 16, 2024May 17, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
7,632$9.80$74.8K276,242May 15, 2024May 17, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF TECHNOLOGY OFFICER
6,765$9.74$65.9K283,874Feb 15, 2024Feb 16, 2024 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
85,058——290,639Jan 2, 2024Jan 4, 2024 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
30,339——30,339Jan 2, 2024Jan 4, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Technology Officer
1,665$7.89$13.1K205,581Nov 15, 2023Nov 17, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Technology Officer
5,444$8.58$46.7K207,246Sep 6, 2023Sep 7, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Technology Officer
2,648$8.31$22.0K212,690Aug 16, 2023Aug 18, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Technology Officer
1,559$10.88$17.0K221,962May 16, 2023May 18, 2023 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
46,873——221,557Feb 28, 2023Mar 2, 2023 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
18,152——18,152Feb 28, 2023Mar 2, 2023 ↗View →
Other insiders · MGNI
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About this filer
CIK 0001966857
ROLE
CHIEF TECHNOLOGY OFFICER
PRIMARY
MGNI
COMPANIES
1
ACTIVE SINCE
Feb 2023
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