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KZ

Katherine S. Zanotti

EXAS
DIRECTOR · EXACT SCIENCES CORP · CIK 0001367313
FILING MIX · LIFETIME36%/64%
BUYS
10
SELLS
18
TOTAL VALUE
$6.74M
COMPANIES
1
ACTIVE SINCE
Jul 2020
HOLDINGS NOW
0
AVG SELL PX
$94.55
TRADE KIND
SHOWING 28 / 28
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
12 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Katherine S. Zanotti, 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
7d12+33.33%+3.89%+1.81%+2.08%+2.82%—
14d12+33.33%+0.27%+2.25%-1.98%+2.11%—
30d12+33.33%+5.86%+4.96%+0.90%+5.36%—
60d12+41.67%+5.91%+4.33%+1.58%+2.87%—
90d12+66.67%+3.21%+5.07%-1.86%-9.34%—
180d12+54.55%+16.81%+11.40%+4.82%-23.33%—
1y12(1 pending)+60.00%+1.41%+24.89%-23.55%-61.66%—
2y12(2 pending)+80.00%-39.39%+25.22%-64.61%-77.67%—
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
EXAS · 0 shares · as of Mar 23, 2026
018,99237,98356,97575,966202120222023202420252026SHARES 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
FLOW · 10 buys / 18 sellsCOVERAGE · 23 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
EXAS
EXACT SCIENCES CORP
SALE
55,361——5,398Mar 23, 2026Mar 23, 2026 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
5,398——0Mar 23, 2026Mar 23, 2026 ↗View →
EXAS
EXACT SCIENCES CORP
SALE10b5-1
10b5-1 plan
12,000$65.00$780.0K60,759Oct 24, 2025Oct 27, 2025 ↗View →
EXAS
EXACT SCIENCES CORP
SALE10b5-1
10b5-1 plan
3,207$53.20$170.6K72,759Jun 13, 2025Jun 16, 2025 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
5,398——75,966Jun 12, 2025Jun 16, 2025 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
5,444——70,073Jun 13, 2024Jun 17, 2024 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
5,939——70,568Jun 13, 2024Dec 20, 2024 ↗View →
EXAS
EXACT SCIENCES CORP
SALE10b5-1
10b5-1 plan
3,027$90.51$274.0K64,629Jun 9, 2023Jun 12, 2023 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
3,599——67,656Jun 8, 2023Jun 12, 2023 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
4,608$45.14$208.0K60,318Jul 26, 2022Jul 28, 2022 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASE
4,608$10.18$46.9K64,926Jul 26, 2022Jul 28, 2022 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
4,608——0Jul 26, 2022Jul 28, 2022 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
1,086$40.13$43.6K60,318Jun 30, 2022Jul 1, 2022 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
5,606——61,404Jun 9, 2022Jun 13, 2022 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
1,381$111.11$153.4K34,741Jul 30, 2021Aug 3, 2021 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
1,381$111.11$153.4K34,741Jul 30, 2021Aug 2, 2021 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
2,011——36,122Jun 30, 2021Jul 2, 2021 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
869$133.49$116.0K21,907Dec 14, 2020Dec 14, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
1,736$130.44$226.4K40,171Dec 14, 2020Dec 14, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
7,119$132.61$944.1K22,776Dec 14, 2020Dec 14, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
10,276$131.83$1.35M29,895Dec 14, 2020Dec 14, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
5,257——0Jul 31, 2020Aug 4, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASE
5,257$8.52$44.8K62,936Jul 31, 2020Aug 4, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
15,772——0Jul 31, 2020Aug 4, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
21,029$94.00$1.98M41,907Jul 31, 2020Aug 4, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASE
15,772$8.52$134.4K57,679Jul 31, 2020Aug 4, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
SALE
1,164$96.13$111.9K41,907Jul 28, 2020Jul 30, 2020 ↗View →
EXAS
EXACT SCIENCES CORP
PURCHASEGRANT
Stock grant
2,558——43,071Jul 23, 2020Jul 24, 2020 ↗View →
Other insiders · EXAS
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About this filer
CIK 0001367313
ROLE
Director
PRIMARY
EXAS
COMPANIES
1
ACTIVE SINCE
Jul 2020
MARKETPEEL · /INSIDER/0001367313DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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