STOCK TITAN

908 Devices (MASS) director receives option and RSU grants after RSU vesting

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

Rhea-AI Filing Summary

908 Devices Inc. director ELOI FENEL M reported equity awards and an option exercise-related share delivery. On June 10, 2026, 14,083 Restricted Stock Units vested and converted into 14,083 shares of Common Stock, bringing direct holdings to 40,897 shares.

On June 11, 2026, the director received a grant of 6,209 stock options with an exercise price of $8.22 per share, expiring on June 10, 2036, which vest in substantially equal monthly installments over the 12 months following June 11, 2026. The director was also granted 13,656 Restricted Stock Units that vest in full on June 11, 2027 or the day prior to the 2027 annual stockholders’ meeting, with prorated vesting if service ends earlier.

Positive

  • None.

Negative

  • None.
Insider ELOI FENEL M
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 — 40,897 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.
Options granted 6,209 options Stock Option grant on June 11, 2026
Option exercise price $8.22 per share Exercise price of stock options expiring June 10, 2036
RSUs granted 13,656 RSUs New RSU award vesting by June 11, 2027 or prior to 2027 meeting
RSUs vested and converted 14,083 RSUs/shares RSUs fully vested on June 10, 2026 and delivered as Common Stock
Common shares after transactions 40,897 shares Direct Common Stock holdings following June 10, 2026 vesting
Option expiration June 10, 2036 Expiration date of 6,209 stock options
RSU vesting date (new grant) June 11, 2027 Latest vesting date or day prior to 2027 annual meeting
Restricted Stock Unit financial
"Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
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.
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.
exercise price financial
"conversion_or_exercise_price": "8.2200""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
Common Stock financial
"represents a contingent right to receive one share of Common Stock, par value $0.001"
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.
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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*
ELOI FENEL M

(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)40,897D
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 insider transactions did 908 Devices (MASS) report for ELOI FENEL M?

ELOI FENEL M reported equity awards and an RSU vesting. 14,083 RSUs vested into Common Stock, plus grants of 6,209 stock options and 13,656 RSUs as part of director compensation at 908 Devices.

How many stock options were granted to the 908 Devices (MASS) director?

The director received 6,209 stock options. These options have an exercise price of $8.22 per share, expire on June 10, 2036, and vest in substantially equal monthly installments over the 12 months following June 11, 2026.

What Restricted Stock Unit (RSU) grants were reported for 908 Devices (MASS)?

The filing shows a grant of 13,656 RSUs and a separate block of 14,083 RSUs that fully vested. The 13,656 RSUs vest by June 11, 2027 or the day before the 2027 annual meeting, subject to continued service and prorated vesting if service ends earlier.

When did the 14,083 RSUs at 908 Devices (MASS) fully vest?

The 14,083 RSUs became fully vested on June 10, 2026. That date was the day before the 2026 annual meeting of 908 Devices stockholders, and the vesting resulted in delivery of an equal number of Common Stock shares to the director.

How many 908 Devices (MASS) shares does the director hold after these transactions?

After the reported transactions, the director holds 40,897 shares of Common Stock directly. This total reflects the 14,083 shares received upon RSU vesting on June 10, 2026, alongside previously held shares shown in the Form 4 ownership table.

What are the vesting terms for the 13,656 RSUs at 908 Devices (MASS)?

The 13,656 RSUs vest in full on June 11, 2027 or the day before the 2027 annual stockholders’ meeting, whichever occurs first. Vesting requires continued service, with a prorated number vesting if the director’s service ends before the scheduled vesting date.