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Insider Trading Intelligence
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BS

Brian M. Stuglik

VSTM
CHIEF EXECUTIVE OFFICER · VERASTEM, INC. · CIK 0001716328
FILING MIX · LIFETIME36%/64%
BUYS
22
SELLS
39
TOTAL VALUE
$410.9K
COMPANIES
2
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
251,005
AVG SELL PX
$2.25
TRADE KIND
SHOWING 61 / 61
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
35 backtested trades · 8 horizons · 11 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Brian M. Stuglik, 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
7d35+65.71%-4.77%+0.04%-4.80%-7.09%-3.08
14d35+60.00%-3.56%+0.45%-4.01%-4.22%-1.47
30d35+48.57%+0.07%+0.56%-0.49%-1.67%-0.12
60d35+45.71%+3.68%+2.00%+1.68%-0.10%0.33
90d35+54.29%+2.81%+2.89%-0.08%-1.61%-0.01
180d35+51.43%+6.92%+5.82%+1.10%-4.89%0.10
1y35(2 pending)+57.58%+7.29%+15.54%-8.25%-44.22%-0.59
2y35(9 pending)+57.69%-16.80%+38.05%-54.86%-54.18%—
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
VSTM · 137,147 shares · as of May 21, 2026
0554,0891,108,1781,662,2662,216,355202120222023202420252026SHARES 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 · 22 buys / 39 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
PBYI
PUMA BIOTECHNOLOGY, INC.
SALE10b5-1
10b5-1 plan
8,100$7.20$58.3K113,858Jun 12, 2026Jun 15, 2026 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,000——121,958Jun 11, 2026Jun 15, 2026 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
36,000——137,147May 21, 2026May 26, 2026 ↗View →
VSTM
VERASTEM, INC.
SALE10b5-1
10b5-1 plan
592$9.14$5.4K101,147Dec 16, 2025Dec 18, 2025 ↗View →
VSTM
VERASTEM, INC.
SALE10b5-1
10b5-1 plan
587$9.99$5.9K101,739Sep 16, 2025Sep 18, 2025 ↗View →
VSTM
VERASTEM, INC.
SALE
594$5.65$3.4K102,326Jun 16, 2025Jun 20, 2025 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
SALE10b5-1
10b5-1 plan
8,100$3.39$27.5K94,958Jun 13, 2025Jun 17, 2025 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,000——103,058Jun 11, 2025Jun 13, 2025 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
8,333——102,920May 22, 2025May 27, 2025 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
12,500——12,500May 22, 2025May 27, 2025 ↗View →
VSTM
VERASTEM, INC.
SALE
593$6.95$4.1K94,587Mar 17, 2025Mar 19, 2025 ↗View →
VSTM
VERASTEM, INC.
SALE
334$4.37$1.5K95,180Dec 19, 2024Dec 20, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
595$4.54$2.7K95,514Dec 16, 2024Dec 20, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
336$2.79$93796,109Sep 19, 2024Sep 20, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
600$2.80$1.7K96,445Sep 16, 2024Sep 18, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
335$3.21$1.1K97,045Jun 20, 2024Jun 20, 2024 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
8,333——97,380Jun 18, 2024Jun 20, 2024 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
12,500——12,500Jun 18, 2024Jun 20, 2024 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,000——76,058Jun 18, 2024Jun 21, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
593$3.49$2.1K89,047Jun 17, 2024Jun 20, 2024 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
SALE10b5-1
10b5-1 plan
9,900$3.39$33.5K49,058Jun 13, 2024Jun 17, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
273$10.38$2.8K89,640Mar 19, 2024Mar 20, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
537$10.71$5.8K89,913Mar 18, 2024Mar 20, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
4,166——0Mar 11, 2024Mar 13, 2024 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
11,865——11,865Mar 11, 2024Mar 13, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
7,699——0Mar 11, 2024Mar 13, 2024 ↗View →
VSTM
VERASTEM, INC.
SALE
274$7.73$2.1K90,450Dec 19, 2023Dec 20, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
487$7.64$3.7K90,724Dec 18, 2023Dec 20, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
274$9.84$2.7K91,211Sep 19, 2023Sep 20, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
478$9.91$4.7K91,485Sep 18, 2023Sep 20, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
275$10.30$2.8K91,963Jun 20, 2023Jun 21, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
487$9.92$4.8K92,238Jun 16, 2023Jun 21, 2023 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,000——58,958Jun 13, 2023Jun 15, 2023 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
SALE10b5-1
10b5-1 plan
9,900$3.46$34.3K31,958Jun 13, 2023Jun 15, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
3,508$0.43$1.5K1,112,736Mar 20, 2023Mar 20, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
6,276$0.40$2.5K1,116,244Mar 16, 2023Mar 20, 2023 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
2,216,355——2,216,355Jan 27, 2023Jan 31, 2023 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
3,556$0.37$1.3K1,122,520Dec 19, 2022Dec 20, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
25,162$0.40$10.1K1,126,076Dec 16, 2022Dec 20, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
3,355$1.13$3.8K1,151,238Sep 19, 2022Sep 21, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
5,858$1.08$6.3K1,154,593Aug 1, 2022Aug 2, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
3,362$1.14$3.8K1,160,451Jun 21, 2022Jun 22, 2022 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
SALE
13,000$2.69$34.9K41,858Jun 16, 2022Jun 21, 2022 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,000——54,858Jun 14, 2022Jun 16, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
13,794$1.03$14.2K1,163,813May 16, 2022May 17, 2022 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
50,000——1,177,607May 14, 2022May 17, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
5,857$1.41$8.3K1,127,607May 2, 2022May 4, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
3,507$1.27$4.5K1,133,464Mar 21, 2022Mar 23, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
5,695$1.48$8.4K1,136,971Jan 31, 2022Feb 2, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
26,033$2.05$53.4K1,142,666Jan 3, 2022Jan 5, 2022 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
13,682$2.27$31.1K1,168,699Dec 20, 2021Dec 22, 2021 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
737,000——737,000Dec 15, 2021Dec 17, 2021 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
363,000——1,182,381Dec 15, 2021Dec 17, 2021 ↗View →
VSTM
VERASTEM, INC.
SALE
Chief Executive Officer
5,839$2.59$15.1K819,381Nov 1, 2021Dec 17, 2021 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27,858——27,858Jun 15, 2021Jun 17, 2021 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
191,828——1,186,185Mar 25, 2021Mar 29, 2021 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
203,776——994,357Dec 18, 2020Dec 22, 2020 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
611,328——611,328Dec 18, 2020Dec 22, 2020 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
419,581——790,581Aug 11, 2020Aug 13, 2020 ↗View →
PBYI
PUMA BIOTECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
93,953——93,953Jul 5, 2020Jul 7, 2020 ↗View →
VSTM
VERASTEM, INC.
PURCHASEGRANT
Stock grant
100,000——371,000Mar 27, 2020Mar 30, 2020 ↗View →
Other insiders · VSTM
Loading peer insiders…
About this filer
CIK 0001716328
ROLE
Chief Executive Officer
PRIMARY
VSTM
COMPANIES
2
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001716328DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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