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Person · CIK 1836988

Christopher D. Brown

Chief Product Officer at 908 Devices

Source: Forms 3, 4, 5 and 144 on SEC EDGAR

Sold on Form 4$8.2M
Noticed on Form 144$2.5M
Bought on Form 4$0
Companies1

Holdings now

As reported after the latest Form 3, 4 or 5 at each company.

How these figures work

Options and RSUs are from the latest filing that lists them; earlier grants may also be held. Holdings can be out of date when a person stops filing.

CompanySecurityHeldShares or unitsAs of
908 Devices MASSCommon StockDirectly775,559Nov 4, 2026 · Filing · EDGAR
908 Devices MASSStock Option (option to buy)
exercise $1.75, expires Jun 22, 2027, into Common Stock
Directly54,318Oct 7, 2026 · Filing · EDGAR

Sold and noticed by quarter

Christopher D. Brown: dollars sold on Form 4 and noticed on Form 144 per quarter, Q3 2021 to Q4 2026$2.2M$0Q3 2021: notice not machine-readableQ3 2021: $2.2M sold on Form 4Q4 2021: notice not machine-readableQ4 2021: $1.2M sold on Form 4Q1 2022: notice not machine-readableQ1 2022: $638K sold on Form 4Q2 2022: notice not machine-readableQ2 2022: $605K sold on Form 4Q3 2022: notice not machine-readableQ3 2022: $604K sold on Form 4Q4 2022: $0 noticed on Form 144Q4 2022: $0 sold on Form 4Q1 2023: notice not machine-readableQ1 2023: $115K sold on Form 4Q2 2023: $172K noticed on Form 144Q2 2023: $145K sold on Form 4Q3 2023: $0 noticed on Form 144Q3 2023: $0 sold on Form 4Q4 2023: $153K noticed on Form 144Q4 2023: $182K sold on Form 4Q1 2024: $0 noticed on Form 144Q1 2024: $28K sold on Form 4Q2 2024: $0 noticed on Form 144Q2 2024: $0 sold on Form 4Q3 2024: $0 noticed on Form 144Q3 2024: $0 sold on Form 4Q4 2024: $0 noticed on Form 144Q4 2024: $0 sold on Form 4Q1 2025: $0 noticed on Form 144Q1 2025: $18K sold on Form 4Q2 2025: $0 noticed on Form 144Q2 2025: $0 sold on Form 4Q3 2025: $0 noticed on Form 144Q3 2025: $0 sold on Form 4Q4 2025: $0 noticed on Form 144Q4 2025: $0 sold on Form 4Q1 2026: $0 noticed on Form 144Q1 2026: $0 sold on Form 4Q2 2026: $1.3M noticed on Form 144Q2 2026: $1.1M sold on Form 4Q3 2026: $888K noticed on Form 144Q3 2026: $669K sold on Form 4Q4 2026: $0 noticed on Form 144Q4 2026: $685K sold on Form 4Q3 2021Q4 2022Q1 2024Q2 2025Q3 2026

Sold (Form 4) Noticed (Form 144) Bought (Form 4)

Quarterly totals as a table
QuarterSold (Form 4)Noticed (Form 144)
Q4 2026$685K—
Q3 2026$669K$888K
Q2 2026$1.1M$1.3M
Q1 2025$18K—
Q1 2024$28K—
Q4 2023$182K$153K
Q2 2023$145K$172K
Q1 2023$115KNot machine-readable
Q3 2022$604KNot machine-readable
Q2 2022$605KNot machine-readable
Q1 2022$638KNot machine-readable
Q4 2021$1.2MNot machine-readable
Q3 2021$2.2MNot machine-readable

Form 144 notices went onto EDGAR as structured data on April 13, 2023. Earlier notices were filed on paper and cannot be read here, so those quarters show no noticed amount.

Planned sales (Form 144) and the sales that followed

Each Form 144 notice of a planned sale, grouped by broker and 10b5-1 plan, with the Form 4 sales we matched to it.

How we match

A Form 144 is a notice of a planned sale by an affiliate. SEC Tracker matches each notice to Form 4 sales by the same person at the same company within 90 days of the notice, up to the shares noticed. The match is our inference, not something either filing states.

Notice dateNoticedPlanned saleOutcomeLinks
908 Devices MASS · Morgan Stanley Smith Barney · 10b5-1 plan adopted Nov 24, 2025 · 3 notices
Aug 10, 2026100,000 · ~$888KAug 10, 2026Sold as noticed Sold 99,442 in 4 sales, Aug 10 to Nov 4 · $1.1M Form 4 (1) · Form 4 (2) · Form 4 (3) · Form 4 (4)Filing · EDGAR
Jun 3, 202670,000 · ~$620KJun 3, 2026Sold as noticed Sold 70,558 in 5 sales, Jun 3 to Aug 11 · $618K Form 4 (1) · Form 4 (2) · Form 4 (3) · Form 4 (4) · Form 4 (5)Filing · EDGAR
Apr 8, 2026100,000 · ~$676KApr 8, 2026Sold as noticed Sold 100,000 in 7 sales, Apr 8 to Jun 23 · $787K Form 4 (1) · Form 4 (2) · Form 4 (3) · Form 4 (4) · Form 4 (5)Filing · EDGAR
908 Devices MASS · Morgan Stanley Smith Barney · 10b5-1 plan adopted Aug 25, 2023 · 1 notice
Dec 19, 202320,000 · ~$153KDec 19, 2023Sold as noticed Sold 20,000 in 4 sales, Dec 19 to Dec 21 · $182K Form 4Filing · EDGAR
908 Devices MASS · Morgan Stanley Smith Barney · 10b5-1 plan adopted Aug 12, 2022 · 1 notice
May 23, 202320,000 · ~$172KMay 23, 2023Partly sold Sold 14,470 in 2 sales, May 23 to Jun 7 · $145K likely match Form 4 (1) · Form 4 (2)Filing · EDGAR
Sales without a matching Form 144 · 31 sales
No matching Form 144 found. Not every sale needs one: small sales and sales by people who are not affiliates are exempt.
———Sold without notice 908 Devices (MASS): Sold 3,641 at $2.33 on Feb 3, 2025 · $9KFiling · EDGAR
———Sold without notice 908 Devices (MASS): Sold 2,459 at $2.34 on Feb 3, 2025 · $6KFiling · EDGAR
———Sold without notice 908 Devices (MASS): Sold 1,667 at $2.36 on Feb 3, 2025 · $4KFiling · EDGAR
———Sold without notice 908 Devices (MASS): Sold 2,358 at $7.02 on Feb 1, 2024 · $17KFiling · EDGAR
———Sold without notice 908 Devices (MASS): Sold 1,599 at $6.99 on Feb 1, 2024 · $11KFiling · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 10,000 at $10.03 on Feb 2, 2023 · $100K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 1,564 at $9.17 on Feb 1, 2023 · $14KFiling · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 20,000 at $19.58 on Sep 12, 2022 · $392K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 3,200 at $21.78 on Jul 6, 2022 · $70K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 6,800 at $21.04 on Jul 6, 2022 · $143K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 3,700 at $20.12 on Jun 30, 2022 · $74K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 16,471 at $20.22 on Jun 29, 2022 · $333K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 9,829 at $20.06 on Apr 12, 2022 · $197K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 19,900 at $20.06 on Mar 18, 2022 · $399K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 100 at $20.00 on Mar 11, 2022 · $2K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 6,714 at $24.05 on Jan 5, 2022 · $161K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 3,286 at $22.89 on Jan 5, 2022 · $75K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 1,230 at $24.29 on Dec 1, 2021 · $30K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 8,770 at $23.80 on Dec 1, 2021 · $209K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 3,426 at $33.24 on Nov 3, 2021 · $114K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 11,574 at $32.75 on Nov 3, 2021 · $379K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 1,580 at $33.33 on Oct 6, 2021 · $53K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 13,420 at $32.19 on Oct 6, 2021 · $432K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 6,315 at $36.24 on Sep 1, 2021 · $229K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 8,685 at $35.68 on Sep 1, 2021 · $310K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 5,400 at $33.40 on Aug 4, 2021 · $180K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 5,100 at $32.47 on Aug 4, 2021 · $166K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 4,500 at $31.58 on Aug 4, 2021 · $142K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 200 at $34.99 on Jul 7, 2021 · $7K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 5,035 at $34.25 on Jul 7, 2021 · $172K (10b5-1 plan)Filing · EDGAR
———Notice not machine-readable 908 Devices (MASS): Sold 29,765 at $33.52 on Jul 7, 2021 · $998K (10b5-1 plan)Filing · EDGAR

Every transaction, by company

Each Form 3, 4 and 5 transaction in plain words, newest first.

How these figures work

Values are shares times the price each filing states; grants, exercises and gifts usually state no price. Held after is what the filing reports was held once the transaction was done, directly or through the named holder.

908 Devices MASS Chief Product Officer · filings 2020 to 2026 · sold $8.2M · $2.5M noticed on Form 144

DateTransactionSharesPriceValueHeld afterSource
Nov 4, 2026Sale under a 10b5-1 plan−30,000$10.95$329K775,559 directFiling · EDGAR
Oct 7, 2026Sale under a 10b5-1 plan−30,000$11.89$357K745,559 directFiling · EDGAR
Oct 7, 2026Option or RSU exercised or converted+60,000$1.75$105K805,559 directFiling · EDGAR
Oct 7, 2026Option or RSU exercised or converted
Stock Option (option to buy)
−60,00054,318 directFiling · EDGAR
Sep 2, 2026Sale under a 10b5-1 plan−30,000$10.58$317K775,559 directFiling · EDGAR
Aug 11, 2026Sale under a 10b5-1 plan−8,358$9.23$77K805,559 directFiling · EDGAR
Aug 10, 2026Sale under a 10b5-1 plan−9,442$9.03$85K813,917 directFiling · EDGAR
Aug 5, 2026Sale under a 10b5-1 plan−20,000$8.49$170K823,359 directFiling · EDGAR
Jul 2, 2026Sale under a 10b5-1 plan−2,200$9.02$20K843,359 directFiling · EDGAR
Jun 30, 2026Sale under a 10b5-1 plan−20,000$8.84$177K845,559 directFiling · EDGAR
Jun 23, 2026Sale under a 10b5-1 plan−9,900$9.04$89K865,559 directFiling · EDGAR
Jun 4, 2026Sale under a 10b5-1 plan−100$9.00$900875,459 directFiling · EDGAR
Jun 3, 2026Sale under a 10b5-1 plan−20,000$8.73$175K875,559 directFiling · EDGAR
May 28, 2026Sale under a 10b5-1 plan−30,000$9.00$270K895,559 directFiling · EDGAR
May 6, 2026Sale under a 10b5-1 plan−20,000$7.23$145K925,559 directFiling · EDGAR
Apr 10, 2026Sale under a 10b5-1 plan−17,578$7.07$124K945,559 directFiling · EDGAR
Apr 9, 2026Sale under a 10b5-1 plan−7,392$7.04$52K963,137 directFiling · EDGAR
Apr 8, 2026Sale under a 10b5-1 plan−15,030$7.05$106K970,529 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted+5,027967,149 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted+7,418974,567 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted+10,992985,559 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted
Restricted Stock Units
−5,0270 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted
Restricted Stock Units
−7,4187,418 directFiling · EDGAR
Feb 1, 2026Option or RSU exercised or converted
Restricted Stock Units
−10,99221,982 directFiling · EDGAR
Feb 3, 2025Open-market or private sale−1,667$2.36$4K968,222 directFiling · EDGAR
Feb 3, 2025Open-market or private sale−2,459$2.34$6K965,763 directFiling · EDGAR
Feb 3, 2025Open-market or private sale−3,641$2.33$9K962,122 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted+5,027951,480 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted+7,418958,898 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted+10,991969,889 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted
Restricted Stock Units
−5,0275,027 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted
Restricted Stock Units
−7,41814,836 directFiling · EDGAR
Feb 1, 2025Option or RSU exercised or converted
Restricted Stock Units
−10,99132,974 directFiling · EDGAR
Dec 19, 2024Option or RSU exercised or converted+55,131$1.58$87K946,453 directFiling · EDGAR
Dec 19, 2024Option or RSU exercised or converted
Stock Option (Right to Buy)
−55,1310 directFiling · EDGAR
Aug 7, 2024Option or RSU exercised or converted+6,328$1.58$10K891,322 directFiling · EDGAR
Aug 7, 2024Option or RSU exercised or converted
Stock Option (Right to Buy)
−6,32855,131 directFiling · EDGAR
Apr 1, 2024Option or RSU exercised or converted+3,600$1.75$6K884,994 directFiling · EDGAR
Apr 1, 2024Option or RSU exercised or converted
Stock Option (Right to Buy)
−3,600114,318 directFiling · EDGAR
Mar 1, 2024Grant or award from the company
Stock Option (option to buy)
+60,06460,064 directFiling · EDGAR
Mar 1, 2024Grant or award from the company
Restricted Stock Units
+43,96543,965 directFiling · EDGAR
Feb 1, 2024Option or RSU exercised or converted+5,028882,933 directFiling · EDGAR
Feb 1, 2024Option or RSU exercised or converted+7,418890,351 directFiling · EDGAR
Feb 1, 2024Open-market or private sale−1,599$6.99$11K888,752 directFiling · EDGAR
Feb 1, 2024Open-market or private sale−2,358$7.02$17K886,394 directFiling · EDGAR
Feb 1, 2024Option or RSU exercised or converted
Restricted Stock Units
−5,02810,054 directFiling · EDGAR
Feb 1, 2024Option or RSU exercised or converted
Restricted Stock Units
−7,41822,254 directFiling · EDGAR
Dec 21, 2023Sale under a 10b5-1 plan−7,370$9.12$67K877,905 directFiling · EDGAR
Dec 20, 2023Sale under a 10b5-1 plan−5,235$9.10$48K885,275 directFiling · EDGAR
Dec 19, 2023Sale under a 10b5-1 plan−6,090$9.08$55K891,815 directFiling · EDGAR
Dec 19, 2023Sale under a 10b5-1 plan−1,305$9.08$12K890,510 directFiling · EDGAR
Jun 7, 2023Sale under a 10b5-1 plan−4,470$10.03$45K897,905 directFiling · EDGAR
May 23, 2023Sale under a 10b5-1 plan−10,000$10.02$100K892,375 directFiling · EDGAR
Mar 1, 2023Grant or award from the company
Stock Option (option to buy)
+45,01845,018 directFiling · EDGAR
Mar 1, 2023Grant or award from the company
Restricted Stock Unit
+29,67229,672 directFiling · EDGAR
Feb 2, 2023Sale under a 10b5-1 plan−10,000$10.03$100K902,375 directFiling · EDGAR
Feb 1, 2023Option or RSU exercised or converted+5,027913,939 directFiling · EDGAR
Feb 1, 2023Open-market or private sale−1,564$9.17$14K912,375 directFiling · EDGAR
Feb 1, 2023Option or RSU exercised or converted
Restricted Stock Unit
−5,02715,082 directFiling · EDGAR
Sep 12, 2022Sale under a 10b5-1 plan−20,000$19.58$392K908,912 directFiling · EDGAR

27 earlier transactions are in the filing list below.

All 47 Forms 3, 4, 5 and 144
FiledFormCompanyLinks
Nov 6, 2026Form 4908 Devices MASSFiling · EDGAR
Oct 9, 2026Form 4908 Devices MASSFiling · EDGAR
Sep 4, 2026Form 4908 Devices MASSFiling · EDGAR
Aug 12, 2026Form 4908 Devices MASSFiling · EDGAR
Aug 10, 2026Form 144908 Devices MASSFiling · EDGAR
Aug 7, 2026Form 4908 Devices MASSFiling · EDGAR
Jul 7, 2026Form 4908 Devices MASSFiling · EDGAR
Jul 2, 2026Form 4908 Devices MASSFiling · EDGAR
Jun 25, 2026Form 4908 Devices MASSFiling · EDGAR
Jun 5, 2026Form 4908 Devices MASSFiling · EDGAR
Jun 4, 2026Form 4908 Devices MASSFiling · EDGAR
Jun 3, 2026Form 144908 Devices MASSFiling · EDGAR
May 29, 2026Form 4908 Devices MASSFiling · EDGAR
May 7, 2026Form 4908 Devices MASSFiling · EDGAR
Apr 10, 2026Form 4908 Devices MASSFiling · EDGAR
Apr 8, 2026Form 144908 Devices MASSFiling · EDGAR
Feb 3, 2026Form 4908 Devices MASSFiling · EDGAR
Jun 18, 2025Form 3908 Devices MASSFiling · EDGAR
Feb 4, 2025Form 4908 Devices MASSFiling · EDGAR
Dec 19, 2024Form 4908 Devices MASSFiling · EDGAR
Aug 8, 2024Form 4908 Devices MASSFiling · EDGAR
Apr 2, 2024Form 4908 Devices MASSFiling · EDGAR
Mar 5, 2024Form 4908 Devices MASSFiling · EDGAR
Feb 2, 2024Form 4908 Devices MASSFiling · EDGAR
Dec 21, 2023Form 4908 Devices MASSFiling · EDGAR
Dec 19, 2023Form 144908 Devices MASSFiling · EDGAR
Jun 9, 2023Form 4908 Devices MASSFiling · EDGAR
May 25, 2023Form 4908 Devices MASSFiling · EDGAR
May 23, 2023Form 144908 Devices MASSFiling · EDGAR
Mar 16, 2023Form 4908 Devices MASSFiling · EDGAR
Feb 3, 2023Form 4908 Devices MASSFiling · EDGAR
Sep 14, 2022Form 4908 Devices MASSFiling · EDGAR
Jul 8, 2022Form 4908 Devices MASSFiling · EDGAR
Jul 1, 2022Form 4908 Devices MASSFiling · EDGAR
Apr 14, 2022Form 4908 Devices MASSFiling · EDGAR
Mar 21, 2022Form 4908 Devices MASSFiling · EDGAR
Mar 15, 2022Form 4908 Devices MASSFiling · EDGAR
Mar 3, 2022Form 4908 Devices MASSFiling · EDGAR
Jan 7, 2022Form 4908 Devices MASSFiling · EDGAR
Dec 3, 2021Form 4908 Devices MASSFiling · EDGAR
Nov 4, 2021Form 4908 Devices MASSFiling · EDGAR
Oct 7, 2021Form 4908 Devices MASSFiling · EDGAR
Sep 3, 2021Form 4908 Devices MASSFiling · EDGAR
Aug 6, 2021Form 4908 Devices MASSFiling · EDGAR
Jul 8, 2021Form 4908 Devices MASSFiling · EDGAR
Dec 22, 2020Form 4908 Devices MASSFiling · EDGAR
Dec 17, 2020Form 3908 Devices MASSFiling · EDGAR

Every figure is as filed with the SEC on Forms 3, 4, 5 and 144. Holdings are the amounts reported after each person's latest filing at each company and can be out of date. Matching a Form 144 notice to Form 4 sales is SEC Tracker's inference from owner, company, dates and share counts, not something the filings state. Not investment advice. Not affiliated with the U.S. SEC.

Data on this page was fetched . The filing on SEC.gov is the record.