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Director at 908 Devices (MASS) sells 2,200 shares under 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

908 Devices Inc. director Christopher D. Brown reported an open-market sale of common stock. On July 2, 2026, he sold 2,200 shares at a weighted average price of $9.02 per share under a pre-arranged Rule 10b5-1 trading plan. Following this transaction, he directly holds 843,359 shares of 908 Devices common stock.

Positive

  • None.

Negative

  • None.
Insider Brown Christopher D.
Role null
Sold 2,200 shs ($20K)
Type Security Shares Price Value
Sale Common Stock 2,200 $9.02 $20K
Holdings After Transaction: Common Stock — 843,359 shares (Direct, null)
Footnotes (1)
  1. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2025. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.07 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Shares sold 2,200 shares Common Stock sold on July 2, 2026 in open market
Average sale price $9.02 per share Weighted average price for the 2,200 shares sold
Price range of sales $9.00 to $9.07 Range of individual trade prices for the sold shares
Shares held after sale 843,359 shares Direct ownership following the July 2, 2026 transaction
Net shares sold 2,200 shares Net selling activity reported in the transaction summary
Rule 10b5-1 trading plan financial
"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2025."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.07 inclusive."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
open-market sale financial
"transaction_action: open-market sale"
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transaction did 908 Devices (MASS) director Christopher D. Brown report?
Christopher D. Brown reported selling 2,200 shares of 908 Devices common stock. The sale occurred on July 2, 2026 as an open-market transaction at a weighted average price of $9.02 per share, and was disclosed on a Form 4 insider trading report.

At what price did Christopher D. Brown sell 908 Devices (MASS) shares?
He sold the 2,200 shares at a weighted average price of $9.02 per share. Footnotes state the shares were sold in multiple trades between $9.00 and $9.07, with full price breakdowns available from the company or the SEC upon request.

How many 908 Devices (MASS) shares does Christopher D. Brown hold after this Form 4 sale?
After the reported sale, Christopher D. Brown directly holds 843,359 shares of 908 Devices common stock. This post-transaction holding figure reflects his remaining direct ownership following the 2,200-share open-market sale disclosed in the Form 4 filing.

Was Christopher D. Brown’s sale of 908 Devices (MASS) shares under a Rule 10b5-1 plan?
Yes. A footnote explains the transaction was made under a Rule 10b5-1 trading plan adopted on November 24, 2025. Such plans pre-schedule trades, indicating the timing of this 2,200-share sale was set in advance rather than decided opportunistically.

What does the weighted average price disclosure mean in this 908 Devices (MASS) Form 4?
The Form 4 reports a weighted average sale price of $9.02 per share. A footnote clarifies the 2,200 shares were sold in multiple trades between $9.00 and $9.07, and the insider will provide exact share counts at each price level upon request.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Brown Christopher D.
(Last)(First)(Middle)
C/O 908 DEVICES INC.
44 3RD AVENUE
(Street)
BURLINGTON MASSACHUSETTS 01803
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
908 Devices Inc. [ MASS ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/02/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock07/02/2026S(1)2,200D$9.02(2)843,359D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2025.
2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.07 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
/s/ Mark S. Levine, Attorney-in-Fact07/07/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR