Insider · CIK 1836988
Christopher D. Brown
Director at 908 Devices MASS
Full history from EDGAR: holdings now, every transaction and Form 144 planned sales
Open-market buys0
Open-market sales53
Bought$0
Sold$8.2M
Every trade, with what the company filed around it
Open-market buys and sales as each Form 4 states them, newest first.
How these figures work
Notes on each row are as each Form 4 states them, next to SEC Tracker's own records of the company's filings and other insiders' buys. Holding after is what the filing reports they held after the trade, with the change in their holding.
| Date | Company | Trade | Value | Holding after | Notes |
|---|---|---|---|---|---|
| Nov 4, 2026 | 908 Devices MASS | Sold (10b5-1) 30,000 sh at $10.95 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 8 days after the company's SCHEDULE 13G/A filed Oct 27, 2026. | $329K | 775,559 −4% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 8 days after the company's SCHEDULE 13G/A filed Oct 27, 2026. |
| Oct 7, 2026 | 908 Devices MASS | Sold (10b5-1) 30,000 sh at $11.89 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Oct 6, 2026. | $357K | 745,559 −4% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Oct 6, 2026. |
| Sep 2, 2026 | 908 Devices MASS | Sold (10b5-1) 30,000 sh at $10.58 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 8 days after a Form 144 notice of a planned insider sale filed Aug 25, 2026. | $317K | 775,559 −4% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 8 days after a Form 144 notice of a planned insider sale filed Aug 25, 2026. |
| Aug 11, 2026 | 908 Devices MASS | Sold (10b5-1) 8,358 sh at $9.23 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's 10-Q filed Aug 11, 2026. | $77K | 805,559 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's 10-Q filed Aug 11, 2026. |
| Aug 10, 2026 | 908 Devices MASS | Sold (10b5-1) 9,442 sh at $9.03 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Aug 10, 2026. | $85K | 813,917 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Aug 10, 2026. |
| Aug 5, 2026 | 908 Devices MASS | Sold (10b5-1) 20,000 sh at $8.49 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 9 days after the company's SCHEDULE 13G filed Jul 27, 2026. | $170K | 823,359 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 9 days after the company's SCHEDULE 13G filed Jul 27, 2026. |
| Jul 2, 2026 | 908 Devices MASS | Sold (10b5-1) 2,200 sh at $9.02 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 9 days after a Form 144 notice of a planned insider sale filed Jun 23, 2026. | $20K | 843,359 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 9 days after a Form 144 notice of a planned insider sale filed Jun 23, 2026. |
| Jun 30, 2026 | 908 Devices MASS | Sold (10b5-1) 20,000 sh at $8.84 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 7 days after a Form 144 notice of a planned insider sale filed Jun 23, 2026. | $177K | 845,559 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 7 days after a Form 144 notice of a planned insider sale filed Jun 23, 2026. |
| Jun 23, 2026 | 908 Devices MASS | Sold (10b5-1) 9,900 sh at $9.04 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jun 23, 2026. | $89K | 865,559 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jun 23, 2026. |
| Jun 4, 2026 | 908 Devices MASS | Sold (10b5-1) 100 sh at $9.00 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Jun 3, 2026. | $900 | 875,459 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Jun 3, 2026. |
| Jun 3, 2026 | 908 Devices MASS | Sold (10b5-1) 20,000 sh at $8.73 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jun 3, 2026. | $175K | 875,559 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Jun 3, 2026. |
| May 28, 2026 | 908 Devices MASS | Sold (10b5-1) 30,000 sh at $9.00 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's SD filed May 28, 2026. | $270K | 895,559 −3% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's SD filed May 28, 2026. |
| May 6, 2026 | 908 Devices MASS | Sold (10b5-1) 20,000 sh at $7.23 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's 8-K filed May 6, 2026. | $145K | 925,559 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as the company's 8-K filed May 6, 2026. |
| Apr 10, 2026 | 908 Devices MASS | Sold (10b5-1) 17,578 sh at $7.07 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 2 days after a Form 144 notice of a planned insider sale filed Apr 8, 2026. | $124K | 945,559 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 2 days after a Form 144 notice of a planned insider sale filed Apr 8, 2026. |
| Apr 9, 2026 | 908 Devices MASS | Sold (10b5-1) 7,392 sh at $7.04 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Apr 8, 2026. | $52K | 963,137 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Apr 8, 2026. |
| Apr 8, 2026 | 908 Devices MASS | Sold (10b5-1) 15,030 sh at $7.05 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Apr 8, 2026. | $106K | 970,529 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Apr 8, 2026. |
| Feb 3, 2025 | 908 Devices MASS | Sold 1,667 sh at $2.36 The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. | $4K | 968,222 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. |
| Feb 3, 2025 | 908 Devices MASS | Sold 2,459 sh at $2.34 The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. | $6K | 965,763 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. |
| Feb 3, 2025 | 908 Devices MASS | Sold 3,641 sh at $2.33 The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. | $9K | 962,122 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 83 days after the company's 8-K filed Nov 12, 2024. |
| Feb 1, 2024 | 908 Devices MASS | Sold 1,599 sh at $6.99 The filing does not mark this sale as under a Rule 10b5-1 plan. 35 days after a Form 144 notice of a planned insider sale filed Dec 28, 2023. | $11K | 888,752 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 35 days after a Form 144 notice of a planned insider sale filed Dec 28, 2023. |
| Feb 1, 2024 | 908 Devices MASS | Sold 2,358 sh at $7.02 The filing does not mark this sale as under a Rule 10b5-1 plan. 35 days after a Form 144 notice of a planned insider sale filed Dec 28, 2023. | $17K | 886,394 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 35 days after a Form 144 notice of a planned insider sale filed Dec 28, 2023. |
| Dec 21, 2023 | 908 Devices MASS | Sold (10b5-1) 7,370 sh at $9.12 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 2 days after a Form 144 notice of a planned insider sale filed Dec 19, 2023. | $67K | 877,905 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 2 days after a Form 144 notice of a planned insider sale filed Dec 19, 2023. |
| Dec 20, 2023 | 908 Devices MASS | Sold (10b5-1) 5,235 sh at $9.10 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Dec 19, 2023. | $48K | 885,275 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 1 day after a Form 144 notice of a planned insider sale filed Dec 19, 2023. |
| Dec 19, 2023 | 908 Devices MASS | Sold (10b5-1) 6,090 sh at $9.08 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Dec 19, 2023. | $55K | 891,815 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Dec 19, 2023. |
| Dec 19, 2023 | 908 Devices MASS | Sold (10b5-1) 1,305 sh at $9.08 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Dec 19, 2023. | $12K | 890,510 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed Dec 19, 2023. |
| Jun 7, 2023 | 908 Devices MASS | Sold (10b5-1) 4,470 sh at $10.03 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 15 days after a Form 144 notice of a planned insider sale filed May 23, 2023. | $45K | 897,905 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 15 days after a Form 144 notice of a planned insider sale filed May 23, 2023. |
| May 23, 2023 | 908 Devices MASS | Sold (10b5-1) 10,000 sh at $10.02 The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed May 23, 2023. | $100K | 892,375 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. The same day as a Form 144 notice of a planned insider sale filed May 23, 2023. |
| Feb 2, 2023 | 908 Devices MASS | Sold (10b5-1) 10,000 sh at $10.03 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 86 days after the company's 8-K filed Nov 8, 2022. | $100K | 902,375 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 86 days after the company's 8-K filed Nov 8, 2022. |
| Feb 1, 2023 | 908 Devices MASS | Sold 1,564 sh at $9.17 The filing does not mark this sale as under a Rule 10b5-1 plan. 85 days after the company's 8-K filed Nov 8, 2022. | $14K | 912,375 −<1% | The filing does not mark this sale as under a Rule 10b5-1 plan. 85 days after the company's 8-K filed Nov 8, 2022. |
| Sep 12, 2022 | 908 Devices MASS | Sold (10b5-1) 20,000 sh at $19.58 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 125 days after the company's 8-K filed May 10, 2022. | $392K | 908,912 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 125 days after the company's 8-K filed May 10, 2022. |
| Jul 6, 2022 | 908 Devices MASS | Sold (10b5-1) 6,800 sh at $21.04 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 57 days after the company's 8-K filed May 10, 2022. | $143K | 932,112 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 57 days after the company's 8-K filed May 10, 2022. |
| Jul 6, 2022 | 908 Devices MASS | Sold (10b5-1) 3,200 sh at $21.78 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 57 days after the company's 8-K filed May 10, 2022. | $70K | 928,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 57 days after the company's 8-K filed May 10, 2022. |
| Jun 30, 2022 | 908 Devices MASS | Sold (10b5-1) 3,700 sh at $20.12 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 51 days after the company's 8-K filed May 10, 2022. | $74K | 938,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 51 days after the company's 8-K filed May 10, 2022. |
| Jun 29, 2022 | 908 Devices MASS | Sold (10b5-1) 16,471 sh at $20.22 The filing says this sale was under a Rule 10b5-1 plan set up in advance. 50 days after the company's 8-K filed May 10, 2022. | $333K | 942,612 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. 50 days after the company's 8-K filed May 10, 2022. |
| Apr 12, 2022 | 908 Devices MASS | Sold (10b5-1) 9,829 sh at $20.06 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $197K | 959,083 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Mar 18, 2022 | 908 Devices MASS | Sold (10b5-1) 19,900 sh at $20.06 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $399K | 968,912 −2% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Mar 11, 2022 | 908 Devices MASS | Sold (10b5-1) 100 sh at $20.00 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $2K | 988,812 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Jan 5, 2022 | 908 Devices MASS | Sold (10b5-1) 3,286 sh at $22.89 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $75K | 995,626 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Jan 5, 2022 | 908 Devices MASS | Sold (10b5-1) 6,714 sh at $24.05 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $161K | 988,912 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Dec 1, 2021 | 908 Devices MASS | Sold (10b5-1) 8,770 sh at $23.80 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $209K | 1,000,142 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Dec 1, 2021 | 908 Devices MASS | Sold (10b5-1) 1,230 sh at $24.29 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $30K | 998,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Nov 3, 2021 | 908 Devices MASS | Sold (10b5-1) 11,574 sh at $32.75 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $379K | 1,012,338 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Nov 3, 2021 | 908 Devices MASS | Sold (10b5-1) 3,426 sh at $33.24 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $114K | 1,008,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Oct 6, 2021 | 908 Devices MASS | Sold (10b5-1) 13,420 sh at $32.19 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $432K | 1,025,492 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Oct 6, 2021 | 908 Devices MASS | Sold (10b5-1) 1,580 sh at $33.33 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $53K | 1,023,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Sep 1, 2021 | 908 Devices MASS | Sold (10b5-1) 8,685 sh at $35.68 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $310K | 1,045,227 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Sep 1, 2021 | 908 Devices MASS | Sold (10b5-1) 6,315 sh at $36.24 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $229K | 1,038,912 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Aug 4, 2021 | 908 Devices MASS | Sold (10b5-1) 4,500 sh at $31.58 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $142K | 1,064,412 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Aug 4, 2021 | 908 Devices MASS | Sold (10b5-1) 5,100 sh at $32.47 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $166K | 1,059,312 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Aug 4, 2021 | 908 Devices MASS | Sold (10b5-1) 5,400 sh at $33.40 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $180K | 1,053,912 −1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Jul 7, 2021 | 908 Devices MASS | Sold (10b5-1) 29,765 sh at $33.52 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $998K | 1,074,147 −3% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Jul 7, 2021 | 908 Devices MASS | Sold (10b5-1) 5,035 sh at $34.25 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $172K | 1,069,112 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
| Jul 7, 2021 | 908 Devices MASS | Sold (10b5-1) 200 sh at $34.99 The filing says this sale was under a Rule 10b5-1 plan set up in advance. | $7K | 1,068,912 −<1% | The filing says this sale was under a Rule 10b5-1 plan set up in advance. |
Open-market trades are Form 4 transaction codes P (purchase) and S (sale). Planned sales are those the filing marks as made under a Rule 10b5-1 plan. A P-code buy at the offering price within a day of the company's FWP, 424B prospectus or offering 8-K is marked Bought in the offering and left out of open-market buy counts and cluster buys. Prices and values are as stated in each Form 4. Stock prices aren't shown on this page. Not investment advice.
Data on this page was fetched . The filing on SEC.gov is the record.