MarketPeel
Insider Trading Intelligence
Pricing
…
DD

David Day

MGNI
CHIEF FINANCIAL OFFICER · MAGNITE, INC. · CIK 0001523288
FILING MIX · LIFETIME28%/72%
BUYS
31
SELLS
81
TOTAL VALUE
$21.26M
COMPANIES
2
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
817,987
AVG SELL PX
$15.24
TRADE KIND
SHOWING 112 / 112
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
35 backtested trades · 8 horizons · 12 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by David Day, 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
7d35+40.00%+6.57%+0.67%+5.90%+1.50%2.62
14d35+45.71%+10.03%+0.72%+9.32%+4.24%2.84
30d35+31.43%+20.05%+2.36%+17.70%+8.04%3.17
60d35+37.14%+34.45%+2.91%+31.54%+14.15%2.79
90d35+51.43%+73.62%+5.10%+68.52%-9.49%2.80
180d35+40.00%+39.88%+11.70%+28.18%+5.83%1.75
1y35(1 pending)+50.00%+17.44%+21.40%-3.95%-22.74%-0.34
2y35(11 pending)+62.50%-13.82%+19.93%-35.29%-41.19%—
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 · 493,289 shares · as of May 15, 2026
0143,311286,623429,934573,245202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 31 buys / 81 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
14,170$12.82$181.7K493,289May 15, 2026May 19, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
30,617$11.70$358.2K507,459Feb 15, 2026Feb 18, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
35,169$16.17$568.7K538,076Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
72,675——573,245Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
72,675——0Jan 9, 2026Jan 12, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
131,661——500,570Jan 1, 2026Jan 5, 2026 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
44,231——44,231Jan 1, 2026Jan 5, 2026 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
13,197$14.15$186.7K368,909Nov 15, 2025Nov 18, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
13,366$23.85$318.8K382,106Aug 18, 2025Aug 20, 2025 ↗View →
MGNI
MAGNITE, INC.
SALEGRANT
Gift
26,374——395,472Aug 15, 2025Aug 19, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
21,682$22.00$477.0K421,846Jun 30, 2025Jul 2, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
36,000$20.95$754.2K443,528Jun 26, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
36,000$5.28$190.1K479,528Jun 26, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
36,000——44,784Jun 26, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
35,000——80,784Jun 24, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
35,000$5.28$184.8K478,528Jun 24, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
35,000$19.95$698.3K443,528Jun 24, 2025Jun 26, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
38,146——0Jun 18, 2025Jun 20, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
38,146$4.92$187.7K481,674Jun 18, 2025Jun 20, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
38,146$18.95$722.9K443,528Jun 18, 2025Jun 20, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
13,865$15.88$220.2K443,528May 15, 2025May 16, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
31,113$20.00$622.3K457,393Feb 15, 2025Feb 19, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
39,000——38,146Feb 7, 2025Feb 7, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CHIEF FINANCIAL OFFICER
39,000$4.92$191.9K527,506Feb 7, 2025Feb 7, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
39,000$20.00$780.0K488,506Feb 7, 2025Feb 7, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
13,245$18.35$243.0K488,506Feb 6, 2025Feb 7, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
43,000——43,000Jan 9, 2025Jan 13, 2025 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
127,737——501,751Jan 9, 2025Jan 13, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
13,345$17.00$226.9K374,014Jan 3, 2025Jan 7, 2025 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
13,500$16.32$220.3K387,359Dec 17, 2024Dec 18, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
11,644$16.44$191.4K400,859Dec 16, 2024Dec 18, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
9,128$15.85$144.7K412,503Nov 15, 2024Nov 19, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
9,124$12.51$114.1K421,631Aug 15, 2024Aug 16, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
19,077$15.00$286.2K430,755Jul 15, 2024Jul 17, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
21,299$14.01$298.4K449,832Jun 12, 2024Jun 14, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
20,732$13.00$269.5K471,131Jun 3, 2024Jun 5, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
19,370$12.00$232.4K491,863May 16, 2024May 17, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
12,380$9.80$121.3K511,233May 15, 2024May 17, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
30,316$9.74$295.3K523,613Feb 15, 2024Feb 16, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
CHIEF FINANCIAL OFFICER
14,417$9.06$130.6K553,929Feb 1, 2024Feb 2, 2024 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
57,519——57,519Jan 2, 2024Jan 4, 2024 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
161,247——568,346Jan 2, 2024Jan 4, 2024 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
8,767$7.89$69.2K407,099Nov 15, 2023Nov 17, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
9,078$8.31$75.4K415,866Aug 16, 2023Aug 18, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
21,564$14.00$301.9K424,944Jun 29, 2023Jun 30, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
15,304$13.41$205.2K446,508Jun 13, 2023Jun 14, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE10b5-1
10b5-1 plan
1,213$13.47$16.3K461,812Jun 12, 2023Jun 14, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
16,066$10.88$174.8K463,025May 16, 2023May 18, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
17,739$13.27$235.4K479,091Feb 15, 2023Feb 17, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
14,163$12.14$171.9K496,830Feb 1, 2023Feb 3, 2023 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
161,247——510,993Jan 1, 2023Jan 4, 2023 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
57,519——57,519Jan 1, 2023Jan 4, 2023 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
17,605$11.47$201.9K349,746Nov 15, 2022Nov 17, 2022 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
5,806$9.80$56.9K367,351Aug 15, 2022Aug 17, 2022 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
22,480$10.59$238.1K373,157May 15, 2022May 17, 2022 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
5,407$13.95$75.4K395,637Feb 15, 2022Feb 16, 2022 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
96,819——345,719Feb 1, 2022Feb 3, 2022 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
68,886——68,886Feb 1, 2022Feb 3, 2022 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
55,325——401,044Feb 1, 2022Feb 3, 2022 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
19,449$22.50$437.6K248,900Nov 15, 2021Nov 17, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
5,177$26.82$138.8K268,349Aug 16, 2021Aug 18, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
Chief Financial Officer
35,569$25.98$924.1K273,526May 17, 2021May 19, 2021 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
31,760——309,095Apr 1, 2021Apr 5, 2021 ↗View →
MGNI
MAGNITE, INC.
PURCHASEGRANT
Stock grant
23,634——23,634Apr 1, 2021Apr 5, 2021 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
10,454$1.97$20.6K287,789Mar 25, 2021Mar 26, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
10,454$39.74$415.4K277,335Mar 25, 2021Mar 26, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
10,454——9,584Mar 25, 2021Mar 26, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
20,125$46.99$945.7K277,335Mar 10, 2021Mar 12, 2021 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
20,125$4.92$99.0K297,460Mar 10, 2021Mar 12, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
20,125——77,146Mar 10, 2021Mar 12, 2021 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
7,372$6.06$44.7K284,707Feb 16, 2021Feb 18, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
7,372$60.69$447.4K277,335Feb 16, 2021Feb 18, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
7,372——0Feb 16, 2021Feb 18, 2021 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
12,359$19.43$240.1K283,009Nov 30, 2020Dec 2, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
5,674$19.45$110.4K277,335Nov 30, 2020Dec 2, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
12,795——7,372Nov 23, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
12,795$6.06$77.5K308,163Nov 23, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
12,795$15.90$203.4K295,368Nov 23, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
12,000$14.96$179.5K295,368Nov 20, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
12,000$6.06$72.7K307,368Nov 20, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
12,000——20,167Nov 20, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
70,601$12.72$898.0K295,368Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
63,729——97,271Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
63,729$13.73$875.0K365,969Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
70,601$7.80$550.7K429,698Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
63,729$4.92$313.5K359,097Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
70,601——0Nov 19, 2020Nov 23, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
16,256$11.06$179.8K295,368Nov 16, 2020Nov 18, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
30,000$7.80$234.0K341,624Nov 9, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
30,000——70,601Nov 9, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
30,000$12.23$366.9K311,624Nov 9, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
39,399$7.80$307.3K351,023Nov 6, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
39,399——100,601Nov 6, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
39,399$11.50$453.1K311,624Nov 6, 2020Nov 9, 2020 ↗View →
MGNI
MAGNITE, INC.
PURCHASE
CFO
11,779$1.97$23.2K323,403Oct 14, 2020Oct 15, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
11,779——20,038Oct 14, 2020Oct 15, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
11,779$9.50$111.9K311,624Oct 14, 2020Oct 15, 2020 ↗View →
MGNI
MAGNITE, INC.
SALE
CFO
13,074$8.90$116.4K311,624Oct 13, 2020Oct 15, 2020 ↗View →
RUBI
RUBICO INC.
PURCHASE
CFO
10,000$1.97$19.7K334,698Jun 8, 2020Jun 10, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
10,000——31,817Jun 8, 2020Jun 10, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
10,000$8.69$86.9K324,698Jun 8, 2020Jun 10, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
29,018$7.90$229.2K324,698Jun 5, 2020Jun 5, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
12,965$5.13$66.5K355,358May 20, 2020May 20, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
14,607$5.13$74.9K353,716May 20, 2020Jun 5, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
10,397$5.23$54.4K368,323May 19, 2020Jun 5, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
10,397$5.23$54.4K368,323May 19, 2020May 20, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
11,146$5.43$60.5K378,720May 18, 2020Jun 5, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
11,146$5.43$60.5K378,720May 18, 2020May 20, 2020 ↗View →
RUBI
RUBICO INC.
PURCHASEGRANT
Stock grant
115,784——115,784Apr 1, 2020Apr 3, 2020 ↗View →
RUBI
RUBICO INC.
PURCHASEGRANT
Stock grant
153,993——389,866Apr 1, 2020Apr 3, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
24,547$10.41$255.5K235,873Jan 16, 2020Jan 21, 2020 ↗View →
RUBI
RUBICO INC.
SALE
CFO
25,453$10.45$266.0K260,420Jan 16, 2020Jan 21, 2020 ↗View →
Other insiders · MGNI
Loading peer insiders…
About this filer
CIK 0001523288
ROLE
CHIEF FINANCIAL OFFICER
PRIMARY
MGNI
COMPANIES
2
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001523288DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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