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[Form 4] Quanterix Corp Insider Trading Activity

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

Rhea-AI Filing Summary

Quanterix CorpEverett CunninghamJanuary 19, 2026813,750 performance-based restricted stock units (RSUs)1,070,000 time-based RSUs

The performance-based RSUs vest only if the volume-weighted average price of Quanterix stock meets specified thresholds within a four-year period, as outlined in his January 8, 2026 employment agreement. The time-based RSUs vest in four equal annual installments on January 19, 2027, 2028, 2029, and 20301,883,750 derivative securities$0

Positive

  • None.

Negative

  • None.
Insider Cunningham Everett
Role President and CEO
Type Security Shares Price Value
Grant/Award Performance-Based Restricted Stock Units 813,750 $0.00 --
Grant/Award Time-Based Restricted Stock Units 1,070,000 $0.00 --
Holdings After Transaction: Performance-Based Restricted Stock Units — 813,750 shares (Direct); Time-Based Restricted Stock Units — 1,883,750 shares (Direct)
Footnotes (1)
  1. Each performance-based restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The performance-based RSUs vest upon the volume-weighted average price of the Issuer's common stock meeting certain thresholds within a four-year period, except as provided for under Section 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026. Each time-based RSU represents a contingent right to receive one share of the Issuer's common stock. The time-based RSUs vest as to one-fourth of the total number of shares on each of January 19, 2027, January 19, 2028, January 19, 2029 and January 19, 2030, except as provided for under Section 8(d) or 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4 UNITED 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*
Cunningham Everett
(Last) (First) (Middle)
C/O QUANTERIX CORPORATION
900 MIDDLESEX TURNPIKE
(Street)
BILLERICA MA 01821
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Quanterix Corp [ QTRX ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
President and CEO
3. Date of Earliest Transaction (Month/Day/Year)
01/19/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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)
Code V Amount (A) or (D) Price
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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Performance-Based Restricted Stock Units (1) 01/19/2026 A 813,750 (1) 01/20/2030 Common Stock 813,750 $0 813,750 D
Time-Based Restricted Stock Units (2) 01/19/2026 A 1,070,000 (2) 01/20/2030 Common Stock 1,070,000 $0 1,883,750 D
Explanation of Responses:
1. Each performance-based restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The performance-based RSUs vest upon the volume-weighted average price of the Issuer's common stock meeting certain thresholds within a four-year period, except as provided for under Section 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026.
2. Each time-based RSU represents a contingent right to receive one share of the Issuer's common stock. The time-based RSUs vest as to one-fourth of the total number of shares on each of January 19, 2027, January 19, 2028, January 19, 2029 and January 19, 2030, except as provided for under Section 8(d) or 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026.
Remarks:
/s/ Daniel Char, Attorney-in-Fact 01/20/2026
** Signature of Reporting Person Date
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.

Source: View Original Filing on SEC EDGAR