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BJ

Benjamin Jackson

SERA
GENERAL COUNSEL · SERA PROGNOSTICS, INC. · CIK 0001779964
FILING MIX · LIFETIME36%/64%
BUYS
14
SELLS
25
TOTAL VALUE
$618.9K
COMPANIES
2
ACTIVE SINCE
Aug 2020
HOLDINGS NOW
268,785
AVG SELL PX
$5.73
TRADE KIND
SHOWING 39 / 39
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
18 backtested trades · 8 horizons · 23 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Benjamin Jackson, 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
7d18+44.44%+2.80%+0.91%+1.89%+1.06%—
14d18+72.22%+5.49%+1.38%+4.11%-3.42%—
30d18+55.56%+1.07%+1.16%-0.09%+2.00%—
60d18+66.67%+3.82%+2.86%+0.96%-13.82%—
90d18+50.00%-0.87%+2.97%-3.84%-0.85%—
180d18(2 pending)+68.75%-13.93%+9.78%-23.71%-37.21%—
1y18(6 pending)+83.33%-12.60%+20.95%-33.54%-63.09%—
2y18(15 pending)+100.00%+140.20%+45.44%+94.76%-91.64%—
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
SERA · 161,756 shares · as of Jun 11, 2026
040,98481,968122,951163,9352023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
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 · 14 buys / 25 sellsCOVERAGE · 24 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
2,179$2.01$4.4K161,756Jun 11, 2026Jun 15, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
5,000$1.84$9.2K163,935May 29, 2026Jun 1, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
68,550——68,550Mar 12, 2026Mar 13, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
44,215——158,935Mar 12, 2026Mar 13, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
1,027$2.04$2.1K114,720Mar 11, 2026Mar 12, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
3,119$1.96$6.1K115,747Mar 9, 2026Mar 10, 2026 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
892$3.31$3.0K118,866Dec 10, 2025Dec 11, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
7,059$2.62$18.5K119,758Nov 10, 2025Nov 12, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
934$3.13$2.9K126,817Sep 11, 2025Sep 12, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
6,447$2.54$16.4K127,751Aug 8, 2025Aug 11, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
965$1.48$1.4K134,198Jun 10, 2025Jun 12, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
3,703$1.33$4.9K135,163May 30, 2025Jun 12, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
7,084$2.44$17.3K131,460May 8, 2025May 9, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
2,285$4.16$9.5K138,544Mar 6, 2025Mar 7, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
49,420——49,420Mar 5, 2025Mar 7, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
34,590——140,829Mar 5, 2025Mar 7, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
5,915$4.58$27.1K106,239Feb 13, 2025Feb 14, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE10b5-1
10b5-1 plan
8,407$6.20$52.1K112,154Jan 14, 2025Jan 14, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE10b5-1
10b5-1 plan
7,912$6.38$50.5K120,561Jan 13, 2025Jan 14, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE10b5-1
10b5-1 plan
1,231$8.05$9.9K128,473Jan 10, 2025Jan 14, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE10b5-1
10b5-1 plan
12,041$7.36$88.6K129,704Jan 10, 2025Jan 14, 2025 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
4,727$7.32$34.6K135,528Nov 11, 2024Nov 12, 2024 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
5,022$7.42$37.3K140,255Aug 7, 2024Aug 8, 2024 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
4,902$9.59$47.0K145,277May 8, 2024May 10, 2024 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
1,856$9.02$16.7K150,179Mar 6, 2024Mar 7, 2024 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
5,665$8.03$45.5K152,035Feb 6, 2024Feb 7, 2024 ↗View →
SERA
SERA PROGNOSTICS, INC.
SALE
General Counsel
10,000$5.22$52.2K157,700Dec 7, 2023Dec 7, 2023 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
125,000——162,700Nov 6, 2023Nov 8, 2023 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
39,100——39,100Mar 6, 2023Mar 7, 2023 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
24,700——32,700Mar 6, 2023Mar 7, 2023 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASE
General Counsel
8,000$1.20$9.6K8,000Jun 14, 2022Jun 16, 2022 ↗View →
SERA
SERA PROGNOSTICS, INC.
PURCHASEGRANT
Stock grant
60,345——60,345Mar 23, 2022Mar 24, 2022 ↗View →
MYGN
MYRIAD GENETICS INC
PURCHASEGRANT
Stock grant
18,879——107,029Mar 24, 2021Mar 26, 2021 ↗View →
MYGN
MYRIAD GENETICS INC
PURCHASEGRANT
Stock grant
29,784——88,150Oct 8, 2020Oct 13, 2020 ↗View →
MYGN
MYRIAD GENETICS INC
SALE
E.V.P., General Counsel
416$13.04$5.4K58,366Sep 30, 2020Oct 1, 2020 ↗View →
MYGN
MYRIAD GENETICS INC
SALE
E.V.P., General Counsel
2,935$12.44$36.5K58,782Sep 26, 2020Sep 28, 2020 ↗View →
MYGN
MYRIAD GENETICS INC
SALE
E.V.P., General Counsel
453$12.44$5.6K61,717Sep 25, 2020Sep 28, 2020 ↗View →
MYGN
MYRIAD GENETICS INC
SALE
E.V.P., General Counsel
367$12.44$4.6K62,170Sep 25, 2020Sep 28, 2020 ↗View →
MYGN
MYRIAD GENETICS INC
PURCHASEGRANT
Stock grant
6,541——62,537Aug 12, 2020Aug 17, 2020 ↗View →
Other insiders · SERA
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About this filer
CIK 0001779964
ROLE
General Counsel
PRIMARY
SERA
COMPANIES
2
ACTIVE SINCE
Aug 2020
MARKETPEEL · /INSIDER/0001779964DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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