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JC

Jane Chung

STRO
PRESIDENT AND COO · SUTRO BIOPHARMA, INC. · CIK 0001872398
FILING MIX · LIFETIME51%/49%
BUYS
31
SELLS
30
TOTAL VALUE
$284.3K
COMPANIES
1
ACTIVE SINCE
Aug 2021
HOLDINGS NOW
0
AVG SELL PX
$4.59
TRADE KIND
SHOWING 61 / 61
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Jane Chung, 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
7d1+100.00%+48.72%+0.40%+48.32%+48.32%—
14d1+100.00%+34.62%+3.34%+31.27%+31.27%—
30d1+100.00%+15.38%+1.02%+14.37%+14.37%—
60d1+100.00%+27.31%+2.34%+24.97%+24.97%—
90d1+100.00%+36.28%+4.30%+31.98%+31.98%—
180d1+100.00%+235.77%+3.15%+232.62%+232.62%—
1y1(1 pending)——————
2y1(1 pending)——————
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
STRO · 0 shares · as of Mar 4, 2026
0155,000310,000465,000620,00020222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 31 buys / 30 sellsCOVERAGE · 19 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
788——21,567Mar 4, 2026Mar 6, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
282$21.31$6.0K21,285Mar 4, 2026Mar 6, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
788——0Mar 4, 2026Mar 6, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
175,000——175,000Mar 2, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
40,000——40,000Mar 2, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
2,779$20.55$57.1K20,779Mar 2, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
7,750——23,558Mar 2, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
7,750——23,250Mar 2, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
1,271$20.47$26.0K15,808Mar 1, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
2,500——17,079Mar 1, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
688——688Mar 1, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
688——14,579Mar 1, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
2,500——5,000Mar 1, 2026Mar 3, 2026 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
2,500——14,785Dec 12, 2025Dec 16, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
2,500——5,000Dec 12, 2025Dec 16, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
894$8.02$7.2K13,891Dec 12, 2025Dec 16, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
12,500$0.80$10.0K122,850Oct 15, 2025Oct 16, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
6,708$0.80$5.4K110,350Aug 9, 2025Aug 26, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Executive Officer
18,750——0Aug 9, 2025Aug 26, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Executive Officer
18,750——117,058Aug 9, 2025Aug 26, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
620,000——620,000Apr 4, 2025Apr 8, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
310,000——310,000Apr 4, 2025Apr 8, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
7,875——100,642Mar 4, 2025Mar 6, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
2,334$1.42$3.3K98,308Mar 4, 2025Mar 6, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
7,875——7,875Mar 4, 2025Mar 6, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
6,875——77,217Mar 1, 2025Mar 4, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
6,875——13,750Mar 1, 2025Mar 4, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
25,000——102,217Mar 1, 2025Mar 4, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
25,000——75,000Mar 1, 2025Mar 4, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
9,450$1.59$15.0K92,767Mar 1, 2025Mar 4, 2025 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
25,000——75,000Dec 1, 2024Dec 3, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
25,000——79,262Dec 1, 2024Dec 3, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
8,920$2.69$24.0K70,342Dec 1, 2024Dec 3, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
18,750——18,750Aug 9, 2024Aug 13, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
18,750——60,951Aug 9, 2024Aug 13, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
6,689$3.12$20.9K54,262Aug 9, 2024Aug 13, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
100,000——100,000Mar 5, 2024Mar 7, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
50,000——50,000Mar 5, 2024Mar 7, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
7,875——44,410Mar 4, 2024Mar 6, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
2,209$4.79$10.6K42,201Mar 4, 2024Mar 6, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
7,875——15,750Mar 4, 2024Mar 6, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
PRESIDENT AND COO
6,875——38,573Mar 1, 2024Mar 5, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
2,038$4.95$10.1K36,535Mar 1, 2024Mar 5, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
PRESIDENT AND COO
6,875——20,625Mar 1, 2024Mar 5, 2024 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
35,000——35,000Dec 1, 2023Dec 4, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
100,000——100,000Dec 1, 2023Dec 4, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
6,483$4.22$27.4K31,698Aug 9, 2023Aug 11, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Commercial Officer
18,750——38,181Aug 9, 2023Aug 11, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
18,750——37,500Aug 9, 2023Aug 11, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
7,875——23,625Mar 3, 2023Mar 7, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Commercial Officer
7,875——22,642Mar 3, 2023Mar 7, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
3,211$5.79$18.6K19,431Mar 3, 2023Mar 7, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
40,000——40,000Mar 3, 2023Mar 7, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
27,500——27,500Mar 3, 2023Mar 7, 2023 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
6,483$6.60$42.8K14,767Aug 9, 2022Aug 10, 2022 ↗View →
STRO
SUTRO BIOPHARMA, INC.
SALE
Chief Commercial Officer
18,750——56,250Aug 9, 2022Aug 10, 2022 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
Chief Commercial Officer
18,750——21,250Aug 9, 2022Aug 10, 2022 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
31,500——31,500Mar 4, 2022Mar 7, 2022 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
42,000——42,000Mar 4, 2022Mar 7, 2022 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
160,000——160,000Aug 9, 2021Aug 11, 2021 ↗View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
75,000——75,000Aug 9, 2021Aug 11, 2021 ↗View →
Other insiders · STRO
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About this filer
CIK 0001872398
ROLE
PRESIDENT AND COO
PRIMARY
STRO
COMPANIES
1
ACTIVE SINCE
Aug 2021
MARKETPEEL · /INSIDER/0001872398DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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