Christopher D. Brown
Insider
First SEC filing: June 18, 2025 · Latest: June 5, 2026
Insider at
Insider transactions
0 buys (P)
14 sells (S)
Net: $-1,808,123
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 2, 2026 | MASS | S 10b5-1 | 30,000 | $10.58 | $317,400 | 775,559 Direct | -3.72% | Disposed | 19.9% (price as of 2026-10-02) |
| Aug. 11, 2026 | MASS | S 10b5-1 | 8,358 | $9.23 | $77,144 | 805,559 Direct | -1.03% | Disposed | 37.5% (price as of 2026-10-02) |
| Aug. 10, 2026 | MASS | S 10b5-1 | 9,442 | $9.03 | $85,261 | 813,917 Direct | -1.15% | Disposed | 40.5% (price as of 2026-10-02) |
| Aug. 5, 2026 | MASS | S 10b5-1 | 20,000 | $8.49 | $169,800 | 823,359 Direct | -2.37% | Disposed | 49.5% (price as of 2026-10-02) |
| July 2, 2026 | MASS | S 10b5-1 | 2,200 | $9.02 | $19,844 | 843,359 Direct | -0.26% | Disposed | 40.7% (price as of 2026-10-02) |
| June 30, 2026 | MASS | S 10b5-1 | 20,000 | $8.84 | $176,800 | 845,559 Direct | -2.31% | Disposed | 43.6% (price as of 2026-10-02) |
| June 23, 2026 | MASS | S 10b5-1 | 9,900 | $9.04 | $89,496 | 865,559 Direct | -1.13% | Disposed | 40.4% (price as of 2026-10-02) |
| June 4, 2026 | MASS | S 10b5-1 | 100 | $9.00 | $900 | 875,459 Direct | -0.01% | Disposed | 41.0% (price as of 2026-10-02) |
| June 3, 2026 | MASS | S 10b5-1 | 20,000 | $8.73 | $174,600 | 875,559 Direct | -2.23% | Disposed | 45.4% (price as of 2026-10-02) |
| May 28, 2026 | MASS | S 10b5-1 | 30,000 | $9.00 | $270,000 | 895,559 Direct | -3.24% | Disposed | 41.0% (price as of 2026-10-02) |
| May 6, 2026 | MASS | S 10b5-1 | 20,000 | $7.23 | $144,600 | 925,559 Direct | -2.12% | Disposed | 75.5% (price as of 2026-10-02) |
| April 10, 2026 | MASS | S 10b5-1 | 17,578 | $7.07 | $124,276 | 945,559 Direct | -1.83% | Disposed | 79.5% (price as of 2026-10-02) |
| April 9, 2026 | MASS | S 10b5-1 | 7,392 | $7.04 | $52,040 | 963,137 Direct | -0.76% | Disposed | 80.3% (price as of 2026-10-02) |
| April 8, 2026 | MASS | S 10b5-1 | 15,030 | $7.05 | $105,962 | 970,529 Direct | -1.53% | Disposed | 80.0% (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 5,027 | · | · | 967,149 Direct | +0.52% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 7,418 | · | · | 974,567 Direct | +0.77% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 10,992 | · | · | 985,559 Direct | +1.13% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 5,027 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 7,418 | · | · | 7,418 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2026 | MASS | M | 10,992 | · | · | 21,982 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Feb. 3, 2025 | MASS | S | 1,667 | $2.36 | $3,934 | 968,222 Direct | -0.17% | Disposed | 437.7% (price as of 2026-10-02) |
| Feb. 3, 2025 | MASS | S | 2,459 | $2.34 | $5,754 | 965,763 Direct | -0.25% | Disposed | 442.3% (price as of 2026-10-02) |
| Feb. 3, 2025 | MASS | S | 3,641 | $2.33 | $8,484 | 962,122 Direct | -0.38% | Disposed | 444.6% (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 5,027 | · | · | 951,480 Direct | +0.53% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 7,418 | · | · | 958,898 Direct | +0.78% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 10,991 | · | · | 969,889 Direct | +1.15% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 5,027 | · | · | 5,027 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 7,418 | · | · | 14,836 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2025 | MASS | M | 10,991 | · | · | 32,974 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| Dec. 19, 2024 | MASS | M | 55,131 | $1.58 | $87,107 | 946,453 Direct | +6.19% | Acquired | 703.2% (price as of 2026-10-02) |
| Dec. 19, 2024 | MASS | M | 55,131 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 7, 2024 | MASS | M | 6,328 | $1.58 | $9,998 | 891,322 Direct | +0.72% | Acquired | 703.2% (price as of 2026-10-02) |
| Aug. 7, 2024 | MASS | M | 6,328 | · | · | 55,131 Direct | -10.30% | Disposed | (price as of 2026-10-02) |
| April 1, 2024 | MASS | M | 3,600 | $1.75 | $6,300 | 884,994 Direct | +0.41% | Acquired | 625.1% (price as of 2026-10-02) |
| April 1, 2024 | MASS | M | 3,600 | · | · | 114,318 Direct | -3.05% | Disposed | (price as of 2026-10-02) |
| March 1, 2024 | MASS | A | 60,064 | · | · | 60,064 Direct | · | Acquired | (price as of 2026-10-02) |
| March 1, 2024 | MASS | A | 43,965 | · | · | 43,965 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | M | 5,028 | · | · | 882,933 Direct | +0.57% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | M | 7,418 | · | · | 890,351 Direct | +0.84% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | S | 1,599 | $6.99 | $11,177 | 888,752 Direct | -0.18% | Disposed | 81.5% (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | S | 2,358 | $7.02 | $16,553 | 886,394 Direct | -0.27% | Disposed | 80.8% (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | M | 5,028 | · | · | 10,054 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Feb. 1, 2024 | MASS | M | 7,418 | · | · | 22,254 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| Dec. 21, 2023 | MASS | S 10b5-1 | 7,370 | $9.12 | $67,214 | 877,905 Direct | -0.83% | Disposed | 39.1% (price as of 2026-10-02) |
| Dec. 20, 2023 | MASS | S 10b5-1 | 5,235 | $9.10 | $47,638 | 885,275 Direct | -0.59% | Disposed | 39.5% (price as of 2026-10-02) |
| Dec. 19, 2023 | MASS | S 10b5-1 | 6,090 | $9.08 | $55,297 | 891,815 Direct | -0.68% | Disposed | 39.8% (price as of 2026-10-02) |
| Dec. 19, 2023 | MASS | S 10b5-1 | 1,305 | $9.08 | $11,849 | 890,510 Direct | -0.15% | Disposed | 39.8% (price as of 2026-10-02) |
| June 7, 2023 | MASS | S 10b5-1 | 4,470 | $10.03 | $44,834 | 897,905 Direct | -0.50% | Disposed | 26.5% (price as of 2026-10-02) |
| May 23, 2023 | MASS | S 10b5-1 | 10,000 | $10.02 | $100,200 | 892,375 Direct | -1.11% | Disposed | 26.6% (price as of 2026-10-02) |
| March 1, 2023 | MASS | A | 45,018 | · | · | 45,018 Direct | · | Acquired | (price as of 2026-10-02) |
| March 1, 2023 | MASS | A | 29,672 | · | · | 29,672 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 2, 2023 | MASS | S 10b5-1 | 10,000 | $10.03 | $100,300 | 902,375 Direct | -1.10% | Disposed | 26.5% (price as of 2026-10-02) |
| Feb. 1, 2023 | MASS | M | 5,027 | · | · | 913,939 Direct | +0.55% | Acquired | (price as of 2026-10-02) |
| Feb. 1, 2023 | MASS | S | 1,564 | $9.17 | $14,342 | 912,375 Direct | -0.17% | Disposed | 38.4% (price as of 2026-10-02) |
| Feb. 1, 2023 | MASS | M | 5,027 | · | · | 15,082 Direct | -25.00% | Disposed | (price as of 2026-10-02) |
| Sept. 12, 2022 | MASS | S 10b5-1 | 20,000 | $19.58 | $391,600 | 908,912 Direct | -2.15% | Disposed | -35.2% (price as of 2026-10-02) |
| July 6, 2022 | MASS | S 10b5-1 | 6,800 | $21.04 | $143,072 | 932,112 Direct | -0.72% | Disposed | -39.7% (price as of 2026-10-02) |
| July 6, 2022 | MASS | S 10b5-1 | 3,200 | $21.78 | $69,696 | 928,912 Direct | -0.34% | Disposed | -41.7% (price as of 2026-10-02) |
| June 30, 2022 | MASS | S 10b5-1 | 3,700 | $20.12 | $74,444 | 938,912 Direct | -0.39% | Disposed | -36.9% (price as of 2026-10-02) |
| June 29, 2022 | MASS | S 10b5-1 | 16,471 | $20.22 | $333,044 | 942,612 Direct | -1.72% | Disposed | -37.2% (price as of 2026-10-02) |
| April 12, 2022 | MASS | S 10b5-1 | 9,829 | $20.06 | $197,170 | 959,083 Direct | -1.01% | Disposed | -36.7% (price as of 2026-10-02) |
| March 18, 2022 | MASS | S 10b5-1 | 19,900 | $20.06 | $399,194 | 968,912 Direct | -2.01% | Disposed | -36.7% (price as of 2026-10-02) |
| March 11, 2022 | MASS | S 10b5-1 | 100 | $20.00 | $2,000 | 988,812 Direct | -0.01% | Disposed | -36.6% (price as of 2026-10-02) |
| March 1, 2022 | MASS | A | 33,400 | · | · | 33,400 Direct | · | Acquired | (price as of 2026-10-02) |
| March 1, 2022 | MASS | A | 20,109 | · | · | 20,109 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 5, 2022 | MASS | S 10b5-1 | 3,286 | $22.89 | $75,217 | 995,626 Direct | -0.33% | Disposed | -44.6% (price as of 2026-10-02) |
| Jan. 5, 2022 | MASS | S 10b5-1 | 6,714 | $24.05 | $161,472 | 988,912 Direct | -0.67% | Disposed | -47.2% (price as of 2026-10-02) |
| Dec. 1, 2021 | MASS | S 10b5-1 | 8,770 | $23.80 | $208,726 | 1,000,142 Direct | -0.87% | Disposed | -46.7% (price as of 2026-10-02) |
| Dec. 1, 2021 | MASS | S 10b5-1 | 1,230 | $24.29 | $29,877 | 998,912 Direct | -0.12% | Disposed | -47.8% (price as of 2026-10-02) |
| Nov. 3, 2021 | MASS | S 10b5-1 | 11,574 | $32.75 | $379,048 | 1,012,338 Direct | -1.13% | Disposed | -61.3% (price as of 2026-10-02) |
| Nov. 3, 2021 | MASS | S 10b5-1 | 3,426 | $33.24 | $113,880 | 1,008,912 Direct | -0.34% | Disposed | -61.8% (price as of 2026-10-02) |
| Oct. 6, 2021 | MASS | S 10b5-1 | 13,420 | $32.19 | $431,990 | 1,025,492 Direct | -1.29% | Disposed | -60.6% (price as of 2026-10-02) |
| Oct. 6, 2021 | MASS | S 10b5-1 | 1,580 | $33.33 | $52,661 | 1,023,912 Direct | -0.15% | Disposed | -61.9% (price as of 2026-10-02) |
| Sept. 1, 2021 | MASS | S 10b5-1 | 8,685 | $35.68 | $309,881 | 1,045,227 Direct | -0.82% | Disposed | -64.4% (price as of 2026-10-02) |
| Sept. 1, 2021 | MASS | S 10b5-1 | 6,315 | $36.24 | $228,856 | 1,038,912 Direct | -0.60% | Disposed | -65.0% (price as of 2026-10-02) |
| Aug. 4, 2021 | MASS | S 10b5-1 | 4,500 | $31.58 | $142,110 | 1,064,412 Direct | -0.42% | Disposed | -59.8% (price as of 2026-10-02) |
| Aug. 4, 2021 | MASS | S 10b5-1 | 5,100 | $32.47 | $165,597 | 1,059,312 Direct | -0.48% | Disposed | -60.9% (price as of 2026-10-02) |
| Aug. 4, 2021 | MASS | S 10b5-1 | 5,400 | $33.40 | $180,360 | 1,053,912 Direct | -0.51% | Disposed | -62.0% (price as of 2026-10-02) |
| July 7, 2021 | MASS | S 10b5-1 | 29,765 | $33.52 | $997,723 | 1,074,147 Direct | -2.70% | Disposed | -62.1% (price as of 2026-10-02) |
| July 7, 2021 | MASS | S 10b5-1 | 5,035 | $34.25 | $172,449 | 1,069,112 Direct | -0.47% | Disposed | -62.9% (price as of 2026-10-02) |
| July 7, 2021 | MASS | S 10b5-1 | 200 | $34.99 | $6,998 | 1,068,912 Direct | -0.02% | Disposed | -63.7% (price as of 2026-10-02) |
| Dec. 22, 2020 | MASS | C | 4,396 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 22, 2020 | MASS | C | 4,396 | · | · | 1,103,912 Direct | +0.40% | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Feb. 1, 2026 | MASS | Restricted Stock Units | Common Stock | · | · | 5,027 | Disposed |
| Feb. 1, 2026 | MASS | Restricted Stock Units | Common Stock | · | · | 7,418 | Disposed |
| Feb. 1, 2026 | MASS | Restricted Stock Units | Common Stock | · | · | 10,992 | Disposed |
| Feb. 1, 2025 | MASS | Restricted Stock Units | Common Stock | · | · | 5,027 | Disposed |
| Feb. 1, 2025 | MASS | Restricted Stock Units | Common Stock | · | · | 7,418 | Disposed |
| Feb. 1, 2025 | MASS | Restricted Stock Units | Common Stock | · | · | 10,991 | Disposed |
| Dec. 19, 2024 | MASS | Stock Option (Right to Buy) | Common Stock | $1.58 | Jan. 20, 2029 | 55,131 | Disposed |
| Aug. 7, 2024 | MASS | Stock Option (Right to Buy) | Common Stock | $1.58 | Jan. 20, 2029 | 6,328 | Disposed |
| April 1, 2024 | MASS | Stock Option (Right to Buy) | Common Stock | $1.75 | June 22, 2027 | 3,600 | Disposed |
| March 1, 2024 | MASS | Stock Option (option to buy) | Common Stock, par value $0.001 | $7.35 | Feb. 28, 2034 | 60,064 | Acquired |
| March 1, 2024 | MASS | Restricted Stock Units | Common Stock, par value $0.001 | · | · | 43,965 | Acquired |
| Feb. 1, 2024 | MASS | Restricted Stock Units | Common Stock | · | · | 5,028 | Disposed |
| Feb. 1, 2024 | MASS | Restricted Stock Units | Common Stock | · | · | 7,418 | Disposed |
| March 1, 2023 | MASS | Stock Option (option to buy) | Common Stock, par value $0.001 | $8.83 | Feb. 28, 2033 | 45,018 | Acquired |
| March 1, 2023 | MASS | Restricted Stock Unit | Common Stock, par value $0.001 | · | · | 29,672 | Acquired |
| Feb. 1, 2023 | MASS | Restricted Stock Unit | Common Stock | · | · | 5,027 | Disposed |
| March 1, 2022 | MASS | Stock Option (option to buy) | Common Stock, par value $0.001 | $16.66 | March 1, 2032 | 33,400 | Acquired |
| March 1, 2022 | MASS | Restricted Stock Unit | Common Stock, par value $0.001 | · | · | 20,109 | Acquired |
| Dec. 22, 2020 | MASS | Series D Preferred Stock | Common Stock, par value $0.001 | · | · | 4,396 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 14 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 18, 2025 | MASS | Common Stock | 962,122 | Direct |
| June 18, 2025 | MASS | Stock Option (option to buy) | 114,318 | Direct |
| June 18, 2025 | MASS | Stock Option (option to buy) | 67,604 | Direct |
| June 18, 2025 | MASS | Stock Option (option to buy) | 33,400 | Direct |
| June 18, 2025 | MASS | Stock Option (option to buy) | 45,018 | Direct |
| June 18, 2025 | MASS | Stock Option (option to buy) | 60,064 | Direct |
| June 18, 2025 | MASS | Restricted Stock Units | 5,027 | Direct |
| June 18, 2025 | MASS | Restricted Stock Units | 14,836 | Direct |
| June 18, 2025 | MASS | Restricted Stock Units | 32,974 | Direct |
| Dec. 17, 2020 | MASS | Common Stock, par value $0.001 | 1,099,516 | Direct |
| Dec. 17, 2020 | MASS | Stock Option (option to buy) | 122,918 | Direct |
| Dec. 17, 2020 | MASS | Stock Option (option to buy) | 61,459 | Direct |
| Dec. 17, 2020 | MASS | Stock Option (option to buy) | 67,604 | Direct |
| Dec. 17, 2020 | MASS | Series D Preferred Stock | 4,396 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2021 | $300,000 | $30,000 | · | · | $120,600 | · | $2,427 | $453,027 |
| 2020 | · | · | · | · | · | · | · | · |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.