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908 Devices (MASS) director receives options, RSUs and converts vested units

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

Rhea-AI Filing Summary

908 Devices Inc. director Anthony Hunt reported routine equity compensation and a vesting event. He received a stock option for 6,209 shares of Common Stock with an exercise price of $8.22 per share, vesting in substantially equal monthly installments over the 12 months following June 11, 2026, and expiring on June 10, 2036. He was also granted 13,656 Restricted Stock Units (RSUs), which will fully vest on June 11, 2027 or the day prior to the 2027 Annual Meeting of Stockholders, subject to continued service, with prorated vesting upon earlier termination. Separately, 14,083 RSUs became fully vested on June 10, 2026 and were converted into 14,083 shares of Common Stock, increasing his direct Common Stock holdings to 44,168 shares.

Positive

  • None.

Negative

  • None.
Insider Hunt Anthony
Role null
Type Security Shares Price Value
Grant/Award Restricted Stock Units 13,656 $0.00 --
Grant/Award Stock Option (option to buy) 6,209 $0.00 --
Exercise Restricted Stock Units 14,083 $0.00 --
Exercise Common Stock 14,083 $0.00 --
Holdings After Transaction: Restricted Stock Units — 13,656 shares (Direct, null); Stock Option (option to buy) — 6,209 shares (Direct, null); Common Stock — 44,168 shares (Direct, null)
Footnotes (1)
  1. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested. The RSUs became fully vested on June 10, 2026, the day prior to the 2026 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date. The RSUs become fully vested on June 11, 2027 or the day prior to the 2027 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date. The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 11, 2026, subject to the reporting person's continued service through the applicable vesting date.
New stock options granted 6,209 shares Option grant on June 11, 2026
Option exercise price $8.22 per share Stock option strike price
Option expiration June 10, 2036 Option term end date
New RSUs granted 13,656 units RSU grant on June 11, 2026
RSUs vested and converted 14,083 shares RSUs fully vested on June 10, 2026
Common shares held after event 44,168 shares Direct Common Stock holdings after RSU conversion
Restricted Stock Unit ("RSU") financial
"Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock"
Stock Option financial
"The shares underlying the option become vested and exercisable in substantially equal monthly installments"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
Annual Meeting of the Stockholders financial
"the day prior to the 2027 Annual Meeting of the Stockholders of 908 Devices Inc."
vesting financial
"The RSUs became fully vested on June 10, 2026, the day prior to the 2026 Annual Meeting"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
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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).
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*
Hunt Anthony

(Last)(First)(Middle)
C/O 908 DEVICES INC.
44 THIRD 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)
06/10/2026
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 Stock06/10/2026M14,083A(1)44,168D
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
Restricted Stock Units(1)06/10/2026M14,083 (2) (2)Common Stock14,083$00D
Restricted Stock Units(1)06/11/2026A13,656 (3) (3)Common Stock13,656$013,656D
Stock Option (option to buy)$8.2206/11/2026A6,209 (4)06/10/2036Common Stock6,209$06,209D
Explanation of Responses:
1. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
2. The RSUs became fully vested on June 10, 2026, the day prior to the 2026 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.
3. The RSUs become fully vested on June 11, 2027 or the day prior to the 2027 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.
4. The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 11, 2026, subject to the reporting person's continued service through the applicable vesting date.
/s/ Mark S. Levine, Attorney-in-Fact06/12/2026
** 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)

FAQ

What equity awards did 908 Devices (MASS) director Anthony Hunt receive?

Anthony Hunt received a stock option for 6,209 shares at an exercise price of $8.22 and 13,656 Restricted Stock Units. These awards represent routine director compensation and are subject to specific vesting schedules tied to continued service.

When do Anthony Hunt’s new RSUs in 908 Devices (MASS) vest?

The 13,656 RSUs granted to Anthony Hunt will fully vest on June 11, 2027 or the day before the 2027 Annual Meeting of Stockholders, whichever occurs first. Vesting requires continued service, with prorated vesting if his service ends earlier.

What happened to Anthony Hunt’s previously granted RSUs at 908 Devices (MASS)?

Previously granted RSUs covering 14,083 shares became fully vested on June 10, 2026. Upon vesting, each RSU converted into one share of Common Stock, resulting in the issuance of 14,083 shares and increasing his direct Common Stock holdings accordingly.

How many 908 Devices (MASS) shares does Anthony Hunt hold after these transactions?

Following the RSU conversion, Anthony Hunt directly holds 44,168 shares of Common Stock. In addition, he holds equity awards consisting of 6,209 stock options and 13,656 RSUs, which may deliver further shares as they vest or become exercisable over time.

What are the key terms of Anthony Hunt’s new stock option in 908 Devices (MASS)?

The option covers 6,209 shares of Common Stock at an exercise price of $8.22 per share. It vests in substantially equal monthly installments over the 12 months following June 11, 2026 and remains exercisable until its expiration on June 10, 2036.