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Insider Trading Intelligence
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JG

Jeffrey P. George

MASS
DIRECTOR · 908 DEVICES INC. · CIK 0001796789
FILING MIX · LIFETIME73%/27%
BUYS
38
SELLS
14
TOTAL VALUE
$148.9K
COMPANIES
3
ACTIVE SINCE
May 2020
HOLDINGS NOW
380,797
AVG SELL PX
—
TRADE KIND
SHOWING 52 / 52
Trades · vs SPY
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Performance · forward returns vs SPY
2 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by Jeffrey P. George, 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
7d2+100.00%+14.48%+3.31%+11.16%+11.16%—
14d2+100.00%+13.09%+6.73%+6.36%+6.36%—
30d2+100.00%+11.01%+10.02%+0.99%+0.99%—
60d2+50.00%+1.61%+11.89%+1.46%+1.46%—
90d2+50.00%-13.95%+16.91%-30.86%-30.86%—
180d2(1 pending)+100.00%+0.97%+25.64%-24.66%-24.66%—
1y2(1 pending)+100.00%+36.89%+47.85%-10.95%-10.95%—
2y2(1 pending)+0.00%-16.75%+43.87%-60.62%-60.62%—
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
MASS · 14,083 shares · as of Jun 12, 2025
06,70413,40720,11126,8142022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
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 · 38 buys / 14 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
LENZ
LENZ THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
22,100——22,100Jun 15, 2026Jun 15, 2026 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
34,819——0May 7, 2026May 8, 2026 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
34,819——344,614May 7, 2026May 8, 2026 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
19,824——19,824May 6, 2026May 8, 2026 ↗View →
LENZ
LENZ THERAPEUTICS, INC.
PURCHASE
5,592$8.92$49.9K5,592Mar 27, 2026Mar 30, 2026 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
6,516——6,516Jun 12, 2025Jun 13, 2025 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
14,083——14,083Jun 12, 2025Jun 13, 2025 ↗View →
LENZ
LENZ THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
13,500——13,500Jun 11, 2025Jun 11, 2025 ↗View →
MASS
908 DEVICES INC.
PURCHASE
11,364——26,814Jun 11, 2025Jun 13, 2025 ↗View →
MASS
908 DEVICES INC.
SALE
11,364——0Jun 11, 2025Jun 13, 2025 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
34,819——34,819May 6, 2025May 8, 2025 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
40,258——0May 5, 2025May 8, 2025 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
40,258——309,795May 5, 2025May 8, 2025 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
11,364——11,364Jun 13, 2024Jun 14, 2024 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
15,996——15,996Jun 13, 2024Jun 14, 2024 ↗View →
MASS
908 DEVICES INC.
SALE
7,777——0Jun 12, 2024Jun 14, 2024 ↗View →
MASS
908 DEVICES INC.
PURCHASE
7,777——15,450Jun 12, 2024Jun 14, 2024 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
76,453——269,537May 10, 2024May 14, 2024 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
76,453——0May 10, 2024May 14, 2024 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
40,258——40,258May 2, 2024May 6, 2024 ↗View →
LENZ
LENZ THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
27,000——27,000Mar 21, 2024Mar 25, 2024 ↗View →
MASS
908 DEVICES INC.
SALE
508——0Feb 22, 2024Feb 22, 2024 ↗View →
MASS
908 DEVICES INC.
PURCHASE
508——7,673Feb 22, 2024Feb 22, 2024 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
12,076——12,076Jun 15, 2023Jun 16, 2023 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
7,777——7,777Jun 15, 2023Jun 16, 2023 ↗View →
MASS
908 DEVICES INC.
PURCHASE
4,771——7,165Jun 14, 2023Jun 16, 2023 ↗View →
MASS
908 DEVICES INC.
SALE
4,771——0Jun 14, 2023Jun 16, 2023 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
80,128——0May 10, 2023May 11, 2023 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
80,128——193,084May 10, 2023May 11, 2023 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
76,453——76,453May 9, 2023May 11, 2023 ↗View →
MASS
908 DEVICES INC.
PURCHASE
507——2,394Feb 22, 2023Feb 23, 2023 ↗View →
MASS
908 DEVICES INC.
SALE
507——508Feb 22, 2023Feb 23, 2023 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
4,771——4,771Jun 16, 2022Jun 17, 2022 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
7,970——7,970Jun 16, 2022Jun 17, 2022 ↗View →
MASS
908 DEVICES INC.
SALE
1,379——0Jun 15, 2022Jun 17, 2022 ↗View →
MASS
908 DEVICES INC.
PURCHASE
1,379——1,887Jun 15, 2022Jun 17, 2022 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
80,128——80,128May 9, 2022May 10, 2022 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
35,406——0May 8, 2022May 10, 2022 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
35,406——112,956May 8, 2022May 10, 2022 ↗View →
MASS
908 DEVICES INC.
SALE
508——1,015Feb 22, 2022Feb 23, 2022 ↗View →
MASS
908 DEVICES INC.
PURCHASE
508——508Feb 22, 2022Feb 23, 2022 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
2,455——2,455Jun 17, 2021Jun 21, 2021 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
1,379——1,379Jun 17, 2021Jun 21, 2021 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
46,218——77,550May 6, 2021May 7, 2021 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
46,218——0May 6, 2021May 7, 2021 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
35,406——35,406May 5, 2021May 7, 2021 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
2,562——2,562Mar 1, 2021Mar 3, 2021 ↗View →
MASS
908 DEVICES INC.
PURCHASEGRANT
Stock grant
1,523——1,523Mar 1, 2021Mar 3, 2021 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
7,522——31,332Dec 15, 2020Dec 18, 2020 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
SALE
7,522——0Dec 15, 2020Dec 18, 2020 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASE
23,810$4.16$99.0K23,810May 15, 2020May 15, 2020 ↗View →
AMRX
AMNEAL PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
46,218——46,218May 5, 2020May 6, 2020 ↗View →
Other insiders · MASS
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About this filer
CIK 0001796789
ROLE
Director
PRIMARY
MASS
COMPANIES
3
ACTIVE SINCE
May 2020
MARKETPEEL · /INSIDER/0001796789DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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One short email. Insider buys, congressional trades, and plain-English analysis.

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