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908 Devices (MASS) director gains 5,192 shares from RSU vesting

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

908 Devices Inc. director Brandi C. Vann exercised Restricted Stock Units into 5,192 shares of Common Stock on August 1, 2026. Each RSU represents a contingent right to one share and vests in substantially equal annual installments over three years following August 1, 2025. After this transaction, Vann reported holdings of 10,385 RSUs and 5,192 shares of Common Stock, all held directly.

Positive

  • None.

Negative

  • None.
Insider Vann Brandi C
Role Director
Type Security Shares Price Value
Exercise Restricted Stock Unit F1, F2, F3 5,192 $0.00 $0.00
Exercise Common Stock F1 5,192 -- --
Holdings After Transaction: Restricted Stock Unit — 10,385 shares (Direct); Common Stock — 5,192 shares (Direct)
Footnotes (3)
  1. F1. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
  2. F2. The RSUs become vested in substantially equal annual installments over the 3 years following August 1, 2025, 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.
  3. F3. The RSUs become vested in substantially equal annual installments over the 3 years following August 1, 2025, 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.
Shares acquired 5,192 shares Common Stock acquired on August 1, 2026 upon RSU conversion
RSUs converted 5,192 RSUs Restricted Stock Units exercised or converted on August 1, 2026
RSUs held after transaction 10,385 RSUs Restricted Stock Units reported beneficially owned following the transaction
Vesting period 3 years RSUs vest over three years following August 1, 2025
Restricted Stock Unit financial
"Each Restricted Stock Unit ("RSU") represents a contingent right"
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.
contingent right financial
"represents a contingent right to receive one share of Common Stock"
substantially equal annual installments financial
"RSUs become vested in substantially equal annual installments over the 3 years"
prorated number of RSUs financial
"if the reporting person terminates their service, then a prorated number of RSUs will vest"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What insider transaction did Brandi C. Vann report for 908 Devices (MASS)?

Brandi C. Vann reported exercising Restricted Stock Units into 5,192 shares of Common Stock on August 1, 2026. The derivative RSUs decreased while direct common share ownership increased by the same 5,192-share amount.

How many 908 Devices (MASS) shares did Brandi C. Vann hold after this Form 4?

After the reported transactions, Brandi C. Vann held 5,192 shares of Common Stock directly. In addition, Vann reported 10,385 Restricted Stock Units (RSUs) outstanding, each representing a contingent right to receive one common share when vested.

What was the size of the RSU exercise reported by Brandi C. Vann at 908 Devices (MASS)?

The filing shows an exercise of RSUs covering 5,192 underlying shares of Common Stock. A corresponding derivative entry reflects 5,192 RSUs disposed and the same number of common shares acquired in a matched, non-cash conversion.

What is the vesting schedule of Brandi C. Vann’s RSUs at 908 Devices (MASS)?

The RSUs vest in substantially equal annual installments over three years following August 1, 2025. Vesting is subject to continued service, with a prorated number of RSUs vesting if service terminates for any reason before full vesting.

Do Brandi C. Vann’s RSUs at 908 Devices (MASS) have an expiration date?

According to the filing, the reported RSUs have no expiration date. They remain outstanding subject to their three-year vesting schedule and prorated vesting terms tied to Vann’s continued service with 908 Devices Inc.
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*
Vann Brandi C

(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)
08/01/2026
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 Stock08/01/2026M5,192A(1)5,192D
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 Unit(1)08/01/2026M5,192 (2) (3)Common Stock5,192$010,385D
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 become vested in substantially equal annual installments over the 3 years following August 1, 2025, 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.
3. The RSUs become vested in substantially equal annual installments over the 3 years following August 1, 2025, 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.
/s/ Mark S. Levine, Attorney-in-Fact08/03/2026
** 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)