Joseph H. Griffith IV insider trades: 908 Devices (MASS) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Joseph reports to the SEC
Open-market buys and sales
20 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 6, 2026 | MASS | ↓ Sell | 5,000 | $13.03 | $65K | Direct | Oct 8, 2026 (2d) |
| Aug 25, 2026 | MASS | ↓ Sell | 11,459 | $10.95 | $125K | Direct | Aug 27, 2026 (2d) |
| May 28, 2026 | MASS | ↓ Sell | 6,940 | $9.03 | $63K | Direct | May 29, 2026 (1d) |
| Feb 2, 2026 | MASS | ↓ Sell | 23,175 | $6.18 | $143K | Direct | Feb 3, 2026 (1d) |
| Oct 3, 2025 | MASS | ↓ Sell | 5,000 | $9.05 | $45K | Direct | Oct 6, 2025 (3d) |
| Sep 19, 2025 | MASS | ↓ Sell | 5,000 | $7.07 | $35K | Direct | Sep 23, 2025 (4d) |
| Jun 4, 2025 | MASS | ↓ Sell | 6,940 | $7.08 | $49K | Direct | Jun 6, 2025 (2d) |
| Feb 3, 2025 | MASS | ↓ Sell | 10,236 | $2.34 | $24K | Direct | Feb 4, 2025 (1d) |
| Feb 2, 2024 | MASS | ↓ Sell | 15,409 | $7.06 | $109K | Direct | Feb 2, 2024 (0d) |
| Dec 28, 2023 | MASS | ↓ Sell | 6,000 | $12.08 | $72K | Direct | Jan 2, 2024 (5d) |
| Dec 19, 2023 | MASS | ↓ Sell | 5,580 | $9.08 | $51K | Direct | Dec 21, 2023 (2d) |
| Feb 2, 2023 | MASS | ↓ Sell | 5,102 | $9.72 | $50K | Direct | Feb 3, 2023 (1d) |
| Aug 4, 2022 | MASS | ↓ Sell | 13,333 | $24.39 | $325K | Direct | Aug 5, 2022 (1d) |
| Jun 27, 2022 | MASS | ↓ Sell | 18,188 | $19.12 | $348K | Direct | Jun 27, 2022 (0d) |
| Jun 21, 2022 | MASS | ↓ Sell | 9,000 | $15.05 | $135K | Direct | Jun 22, 2022 (1d) |
| Jun 15, 2022 | MASS | ↓ Sell | 1,000 | $15.02 | $15K | Direct | Jun 17, 2022 (2d) |
| Jun 13, 2022 | MASS | ↓ Sell | 13,334 | $13.54 | $181K | Direct | Jun 15, 2022 (2d) |
| Nov 5, 2021 | MASS | ↓ Sell | 2,800 | $39.08 | $109K | Direct | Nov 5, 2021 (0d) |
| Sep 8, 2021 | MASS | ↓ Sell | 49,898 | $37.61 | $1.9M | Direct | Sep 10, 2021 (2d) |
| Jun 16, 2021 | MASS | ↓ Sell | 17,814 | $39.32 | $700K | Direct | Jun 21, 2021 (5d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MASS insiders
Open-market trades in the last 12 months
About Joseph H. Griffith IV's insider trades
Joseph H. Griffith IV is Chief Financial Officer at 908 Devices (MASS). Since Jun 16, 2021, Joseph has reported no open-market purchases and 20 sales worth $4.5M on SEC Form 4. In the last 12 months: 4 sales ($397K).
Their filings also include option exercises (22 filings), shares withheld for taxes (11 filings), grants and awards (10 filings), conversions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MASS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.