| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
MASS sits in the Health Care Equipment & Supplies industry within the Health Care sector, so this activity is best read against the sector's broader insider trend.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| Dir | 945.6K | $9.47M | - | |
| Other | 110.2K | $1.10M | - | |
| CFO | 92.9K | $930.2K | - | |
| VP | 44.9K | $449.7K | - | |
| VP | 26.0K | $260.7K | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Apr 10, 2026 | McCallion Kevin J. | SVP, Products And Production | Sale+OE | 2,693 | $7.01 | $18,877.93 | -5.7% | +13.9% | - | |
| Apr 10, 2026 | Brown Christopher D.83 | Director | Sell | 40,000 | $7.06 | $282,277.64 | -1.4% | +13.9% | - | |
| Apr 9, 2026 | McCallion Kevin J. | SVP, Products And Production | Sale+OE | 24,000 | $7.05 | $169,091.60 | -21.1% | +13.2% | - | |
| Oct 3, 2025 | Griffith Joseph H. IV81 | Chief Financial Officer | Sell | 5,000 | $9.05 | $45,246.81 | -2.6% | -43.9% | - | |
| Sep 19, 2025 | Griffith Joseph H. IV81 | Chief Financial Officer | Sell | 5,000 | $7.07 | $35,338.50 | -4.9% | -25.6% | - | |
| Jun 18, 2025 | Turner Michael S.75 | Chief Legal &Admin Officer | Sell | 24,603 | $7.51 | $184,788.93 | -71.3% | -22.7% | +11.0% | |
| Jun 4, 2025 | Griffith Joseph H. IV81 | Chief Financial Officer | Sell | 6,940 | $7.08 | $49,135.20 | -6.3% | -13.9% | +27.8% | |
| May 15, 2025 | Knopp Kevin J.79 | President And CEO | Buy | 15,000 | $4.44 | $66,595.50 | +2.1% | +56.0% | +52.7% | |
| May 14, 2025 | Spoto Mark | Director | Buy | 10,000 | $4.29 | $42,850.00 | +8.9% | +49.8% | +69.0% | |
| May 14, 2025 | Knopp Kevin J.79 | President And CEO | Buy | 15,000 | $4.32 | $64,788.00 | +2.2% | +49.8% | +69.0% |