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Insider Trading Intelligence
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HG

Harpreet Grewal

PEN
DIRECTOR · PENUMBRA INC · CIK 0001375889
FILING MIX · LIFETIME24%/76%
BUYS
7
SELLS
22
TOTAL VALUE
$2.21M
COMPANIES
1
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
8,719
AVG SELL PX
$249.94
TRADE KIND
SHOWING 29 / 29
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
22 backtested trades · 8 horizons · 17 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Harpreet Grewal, 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
7d22+54.55%+1.55%+0.06%+1.50%+0.24%—
14d22+31.82%+2.46%+0.51%+1.94%+2.06%—
30d22+40.91%+2.36%+1.64%+0.72%+1.63%—
60d22+36.36%+6.88%+2.27%+5.11%+6.89%—
90d22+31.82%+10.68%+4.22%+6.46%+9.44%—
180d22(1 pending)+47.62%+5.11%+7.63%-2.80%-11.21%—
1y22(6 pending)+50.00%+0.99%+18.00%-17.01%-17.08%—
2y22(10 pending)+41.67%+8.54%+31.29%-22.75%-28.29%—
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
PEN · 8,719 shares · as of Apr 2, 2026
03,3496,69810,04613,395202120222023202420252026SHARES 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 · 7 buys / 22 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
100$328.22$32.8K8,719Apr 2, 2026Apr 6, 2026 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
589——8,819Feb 13, 2026Feb 18, 2026 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
186$312.64$58.2K8,230Jan 6, 2026Jan 8, 2026 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
100$292.98$29.3K8,416Dec 2, 2025Dec 3, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
186$227.58$42.3K8,516Nov 4, 2025Nov 6, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
186$248.61$46.2K8,702Oct 2, 2025Oct 3, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
186$272.19$50.6K8,888Sep 2, 2025Sep 4, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
200$267.17$53.4K9,074Apr 1, 2025Apr 2, 2025 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
744——9,274Feb 14, 2025Feb 19, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
167$241.28$40.3K8,530Jan 3, 2025Jan 6, 2025 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
166$190.83$31.7K8,697Oct 2, 2024Oct 3, 2024 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
782$204.11$159.6K8,863Sep 4, 2024Sep 5, 2024 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
665——9,645Feb 16, 2024Feb 21, 2024 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
170$240.82$40.9K8,980Jan 3, 2024Jan 4, 2024 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
170$240.99$41.0K9,150Oct 2, 2023Oct 4, 2023 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
340$266.62$90.7K9,320Sep 1, 2023Sep 6, 2023 ↗View →
PEN
PENUMBRA INC
SALE10b5-1
10b5-1 plan
875$271.00$237.1K9,660Mar 29, 2023Mar 31, 2023 ↗View →
PEN
PENUMBRA INC
SALE
875$254.98$223.1K10,535Mar 15, 2023Mar 17, 2023 ↗View →
PEN
PENUMBRA INC
SALE
710$259.48$184.2K11,410Mar 1, 2023Mar 3, 2023 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
680——12,120Feb 17, 2023Feb 22, 2023 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
710——11,440Feb 18, 2022Feb 23, 2022 ↗View →
PEN
PENUMBRA INC
SALE
634$285.34$180.9K10,730Jan 3, 2022Jan 5, 2022 ↗View →
PEN
PENUMBRA INC
SALE
634$267.06$169.3K11,364Oct 1, 2021Oct 5, 2021 ↗View →
PEN
PENUMBRA INC
SALE
732$271.21$198.5K11,998Aug 31, 2021Sep 2, 2021 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
535——12,730Feb 19, 2021Feb 23, 2021 ↗View →
PEN
PENUMBRA INC
SALE
633$174.32$110.3K12,195Jan 4, 2021Jan 6, 2021 ↗View →
PEN
PENUMBRA INC
SALE
567$262.77$149.0K12,828Nov 16, 2020Nov 18, 2020 ↗View →
PEN
PENUMBRA INC
PURCHASEGRANT
Stock grant
756——13,395Feb 11, 2020Feb 13, 2020 ↗View →
PEN
PENUMBRA INC
SALE
237$164.16$38.9K12,639Jan 2, 2020Jan 3, 2020 ↗View →
Other insiders · PEN
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About this filer
CIK 0001375889
ROLE
Director
PRIMARY
PEN
COMPANIES
1
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001375889DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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