Quanterix (QTRX) Chief Commercial Officer buys 3,500 shares in open-market trade

Rhea-AI Filing Summary

Quanterix Corp Chief Commercial Officer Benjamin Meadows reported an open-market purchase of company stock. On May 12, 2026, he bought 3,500 shares of Common Stock at a price of $2.77 per share. Following this transaction, he directly holds 3,500 shares of Quanterix common stock.

Insider Trade Summary

Net Buyer: 3,500 shares ($9,695)

Net Buy 1 txn

Insider Meadows Benjamin

Role Chief Commercial Officer

Bought 3,500 shs ($10K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	3,500	$2.77	$10K

Holdings After Transaction: Common Stock — 3,500 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 3,500 shares Purchase price: $2.77 per share Shares owned after transaction: 3,500 shares +2 more

5 metrics

Shares purchased 3,500 shares Open-market purchase of Common Stock on May 12, 2026

Purchase price $2.77 per share Price paid for Quanterix Common Stock on May 12, 2026

Shares owned after transaction 3,500 shares Direct ownership following the May 12, 2026 purchase

Buy transactions count 1 transaction Single reported open-market purchase in this Form 4

Net buy/sell shares 3,500 shares net buy Net effect of all reported transactions in this filing

Key Terms

open-market purchase, Common Stock, Form 4, non-derivative, +1 more

5 terms

open-market purchase financial

"The transaction is described as an open-market purchase of Common Stock."

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Common Stock financial

"The security title for the transaction is listed as Common Stock."

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.

Form 4 regulatory

"The insider activity is disclosed in a Form 4 filing."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

"The transaction type is identified as non-derivative in the data."

direct ownership financial

"Ownership type is indicated as direct with code D."

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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^*

Meadows Benjamin

(Last) (First) (Middle)

C/O QUANTERIX CORPORATION

900 MIDDLESEX TURNPIKE

(Street)

BILLERICA MASSACHUSETTS 01821

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Quanterix Corp [ QTRX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/12/2026		P		3,500	A	$2.77	3,500	D

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

Explanation of Responses:

Remarks:

	/s/ Meghan Shevlin, Attorney-in-Fact	06/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Quanterix (QTRX) report for Benjamin Meadows?

Quanterix reported that Chief Commercial Officer Benjamin Meadows made an open-market purchase of company stock. He bought 3,500 shares of Quanterix Common Stock at $2.77 per share on May 12, 2026, according to the Form 4 filing.

How many Quanterix (QTRX) shares did Benjamin Meadows buy and at what price?

Benjamin Meadows purchased 3,500 shares of Quanterix Common Stock at $2.77 per share. The transaction was an open-market purchase dated May 12, 2026, and is disclosed as a non-derivative Common Stock transaction in the Form 4.

What are Benjamin Meadows’ Quanterix (QTRX) holdings after this Form 4 transaction?

After the reported transaction, Benjamin Meadows directly holds 3,500 shares of Quanterix Common Stock. The Form 4 states this total as the number of shares owned following his May 12, 2026 open-market purchase of 3,500 shares at $2.77 per share.

Was the Quanterix (QTRX) Form 4 transaction by Benjamin Meadows a buy or a sell?

The transaction was a buy. The Form 4 identifies it as an open-market purchase of Quanterix Common Stock, coded “P” for purchase, with 3,500 shares acquired at $2.77 each on May 12, 2026, and no corresponding sales reported.

Did the Quanterix (QTRX) Form 4 include any derivative or option exercises for Benjamin Meadows?

No, the Form 4 only reports a non-derivative transaction in Common Stock. It lists a single open-market purchase of 3,500 shares at $2.77 per share and shows no derivative transactions or option exercises in the derivativeSummary section.