MarketPeel
Insider Trading Intelligence
UK

Utpal Koppikar

ATRA
CHIEF FINANCIAL OFFICER · ATARA BIOTHERAPEUTICS, INC. · CIK 0001742696
FILING MIX · LIFETIME33%/67%
BUYS
12
SELLS
24
TOTAL VALUE
$737.1K
COMPANIES
2
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
243,978
AVG SELL PX
$9.69
TRADE KIND
SHOWING 36 / 36
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
25 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Utpal Koppikar, 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
7d25+64.00%-4.95%-0.81%-4.14%-6.56%
14d25+64.00%-2.67%+0.15%-2.82%-5.73%
30d25+64.00%-4.21%-0.77%-3.45%-7.56%
60d25+76.00%-16.51%+0.90%-17.41%-16.23%
90d25+56.00%-9.74%+3.17%-12.91%-11.90%
180d25+64.00%-11.01%+6.72%-17.73%-18.91%
1y25+76.00%-39.20%+13.86%-53.06%-56.95%
2y25+88.00%-74.55%+28.44%-102.99%-91.42%
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
ATRA · 181,978 shares · as of Mar 2, 2023
054,234108,469162,703216,937202120222023SHARES 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 · 12 buys / 24 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CCCC
C4 THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
62,00062,000Jun 24, 2026Jun 26, 2026View →
CCCC
C4 THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
35,50035,500Jun 18, 2025Jun 20, 2025View →
CCCC
C4 THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
32,50032,500Jun 20, 2024Jun 21, 2024View →
CCCC
C4 THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
26,00026,000Jun 15, 2023Jun 16, 2023View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
6,871$3.63$24.9K181,978Mar 2, 2023Mar 6, 2023View →
CCCC
C4 THERAPEUTICS, INC.
PURCHASE
5,667$5.60$31.7K5,667Feb 8, 2023Feb 10, 2023View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
2,485$5.46$13.6K188,849Feb 7, 2023Feb 9, 2023View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
5,172$4.49$23.2K192,417Nov 16, 2022Nov 18, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,083$4.49$4.9K191,334Nov 16, 2022Nov 18, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
5,940$5.04$29.9K197,589Aug 16, 2022Aug 18, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
5,853$5.63$33.0K203,529Jun 8, 2022Jun 10, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
966$5.32$5.1K207,592May 17, 2022May 19, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
4,616$5.32$24.5K208,558May 17, 2022May 19, 2022View →
CCCC
C4 THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
41,20041,200Mar 16, 2022Mar 17, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
61,235216,937Mar 1, 2022Mar 3, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
2,272$9.86$22.4K214,665Mar 1, 2022Mar 3, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
115,107115,107Mar 1, 2022Mar 3, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,491$9.86$14.7K213,174Mar 1, 2022Mar 3, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
2,496$14.46$36.1K155,702Feb 7, 2022Feb 9, 2022View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
3,655$17.12$62.6K157,714Nov 16, 2021Nov 18, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
3,579$12.53$44.9K161,369Aug 17, 2021Aug 19, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
5,820$14.06$81.8K164,948Jun 8, 2021Jun 9, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
3,616$14.55$52.6K168,966May 18, 2021May 20, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,761$14.58$25.7K172,582Mar 26, 2021Mar 29, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,461$16.74$24.5K174,343Mar 2, 2021Mar 4, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
45,258175,804Mar 1, 2021Mar 3, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
68,31468,314Mar 1, 2021Mar 3, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,759$20.39$35.9K130,546Feb 8, 2021Feb 9, 2021View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,469$19.77$29.0K132,061Nov 17, 2020Nov 18, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,496$12.09$18.1K133,530Aug 18, 2020Aug 20, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
3,924$10.18$39.9K135,026Jun 9, 2020Jun 10, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,428$11.22$16.0K137,375May 18, 2020May 20, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,827$9.17$16.8K137,330Mar 27, 2020Mar 30, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
66,875139,157Mar 1, 2020Mar 3, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
73,75073,750Mar 1, 2020Mar 3, 2020View →
ATRA
ATARA BIOTHERAPEUTICS, INC.
SALE
Chief Financial Officer
1,781$14.21$25.3K72,282Feb 6, 2020Feb 10, 2020View →
Other insiders · ATRA
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About this filer
CIK 0001742696
ROLE
Chief Financial Officer
PRIMARY
ATRA
COMPANIES
2
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001742696DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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