MarketPeel
Insider Trading Intelligence
TK

Timothy Keutzer

SPRO
CHIEF DEVELOPMENT OFFICER · SPERO THERAPEUTICS, INC. · CIK 0001798155
FILING MIX · LIFETIME45%/55%
BUYS
10
SELLS
12
TOTAL VALUE
$246.4K
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
742,506
AVG SELL PX
$1.52
TRADE KIND
SHOWING 22 / 22
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
10 backtested trades · 8 horizons · 18 pending
Forward-return performance of every backtestable P/S trade by Timothy Keutzer, 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
7d10+60.00%-0.75%-0.10%-0.66%-0.58%
14d10+60.00%-0.10%+0.15%-0.24%-1.87%
30d10+60.00%-2.55%-1.27%-1.28%-4.42%
60d10+40.00%-1.34%-5.36%+4.02%+11.78%
90d10+40.00%-4.94%+1.10%-6.04%-1.01%
180d10(4 pending)+33.33%+73.31%+6.57%+66.74%+79.25%
1y10(5 pending)+20.00%+97.83%+15.40%+82.43%+149.77%
2y10(9 pending)+0.00%+53.27%+42.90%+10.36%+10.36%
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
SPRO · 742,506 shares · as of Feb 6, 2026
0201,936403,872605,808807,744202120222023202420252026SHARES 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
FLOW · 10 buys / 12 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
18,652$2.36$44.0K742,506Feb 6, 2026Feb 9, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
3,471$2.24$7.8K761,158Feb 4, 2026Feb 4, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
24,224$2.14$51.8K764,629Feb 3, 2026Feb 4, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
18,891$2.20$41.6K788,853Feb 2, 2026Feb 4, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
68,000807,744Feb 2, 2026Feb 4, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
137,000137,000Feb 2, 2026Feb 4, 2026View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
1,695$1.97$3.3K739,744Aug 28, 2025Sep 2, 2025View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
24,920$0.78$19.4K741,439Feb 5, 2025Feb 5, 2025View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
27,643$0.78$21.6K766,359Feb 5, 2025Feb 5, 2025View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
3,974$0.78$3.1K794,002Feb 5, 2025Feb 5, 2025View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
266,139797,976Feb 3, 2025Feb 5, 2025View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
2,213$1.35$3.0K531,837Aug 27, 2024Aug 29, 2024View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
30,971$1.36$42.1K534,050Feb 2, 2024Feb 5, 2024View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
239,731565,021Feb 1, 2024Feb 5, 2024View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Development Officer
1,854$1.26$2.3K325,290Aug 28, 2023Aug 30, 2023View →
SPRO
SPERO THERAPEUTICS, INC.
SALE
Chief Operating Officer
3,394$1.86$6.3K327,144Feb 2, 2023Feb 3, 2023View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
265,957330,538Feb 1, 2023Feb 3, 2023View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
53,19053,190Feb 1, 2022Feb 3, 2022View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
38,01464,581Feb 1, 2022Feb 3, 2022View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
24,06726,567Aug 26, 2021Aug 30, 2021View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
57,43257,432Feb 1, 2021Feb 3, 2021View →
SPRO
SPERO THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
55,00055,000Feb 3, 2020Feb 3, 2020View →
Other insiders · SPRO
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About this filer
CIK 0001798155
ROLE
Chief Development Officer
PRIMARY
SPRO
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001798155DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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