SEC Form 4Coverage since May 27, 2026
$MASS insider trading
Over the last 12 months, 908 Devices insiders reported no purchases and 18 sales totaling $4.0M across SEC Form 4 filings. 61% of the activity was filed under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $4.0M 18 events
- Events · 12m
- 18 Form 4 filings, grouped
- Insiders · 12m
- 4 distinct reporters
- 10b5-1 share
- 61% pre-arranged plans
Side
Price · $MASS · 12Mvia TradingView
Top insiders · 12m
Brown Christopher D.—7× · $901K
AWM Investment Company, Inc.—7× · $2.5M
Knopp Kevin J.President and CEO3× · $578K
Griffith Joseph H. IVChief Financial Officer1× · $63K
All insider trades
18 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 5, 2026 | Brown Christopher D.D | ▼ Sale | 20,000 | $8.49 | $170K | -2.4% | plan |
| Aug 4, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 50,000 | $8.36 | $418K | -1% | indirect |
| Jul 2, 2026 | Knopp Kevin J.President and CEO · O·D | ▼ Sale | 222 | $9.07 | $2K | — | plan |
| Jul 2, 2026 | Brown Christopher D.D | ▼ Sale | 2,200 | $9.02 | $20K | -0.3% | plan |
| Jun 30, 2026 | Brown Christopher D.D | ▼ Sale | 20,000 | $8.84 | $177K | -2.3% | plan |
| Jun 26, 2026 | Knopp Kevin J.President and CEO · O·D | ▼ Sale | 2,798 | $9.09 | $25K | -0.4% | plan |
| Jun 25, 2026 | Knopp Kevin J.President and CEO · O·D | ▼ Sale | 60,345 | $9.12 | $551K | -7.6% | plan · 3 tranches |
| Jun 23, 2026 | Brown Christopher D.D | ▼ Sale | 9,900 | $9.04 | $89K | -1.1% | plan |
| Jun 23, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 7,718 | $9 | $69K | -0.2% | 2 tranches · indirect |
| Jun 4, 2026 | Brown Christopher D.D | ▼ Sale | 100 | $9 | $900 | — | plan |
| Jun 4, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 39,782 | $8.97 | $357K | -0.8% | indirect |
| Jun 3, 2026 | Brown Christopher D.D | ▼ Sale | 20,000 | $8.73 | $175K | -2.2% | plan |
| Jun 2, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 2,500 | $8.95 | $22K | -0.1% | indirect |
| May 28, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 170,442 | $8.66 | $1.5M | -3.3% | indirect |
| May 28, 2026 | Brown Christopher D.D | ▼ Sale | 30,000 | $9 | $270K | -3.2% | plan |
| May 28, 2026 | Griffith Joseph H. IVChief Financial Officer · O | ▼ Sale | 6,940 | $9.03 | $63K | -5% | plan |
| May 27, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 15,000 | $8.25 | $124K | -0.3% | indirect |
| May 27, 2026 | AWM Investment Company, Inc.10% | ▼ Sale | 1,500 | $8.25 | $12K | — | indirect |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $MASS feed.