X0508 4 2025-07-08 false 0001503274 Quanterix Corp QTRX 0001168581 LAI GOLDMAN MYLA C/O QUANTERIX CORPORATION 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 true false false false false Common Stock 2025-07-08 4 A false 2940.00 A 2940.00 D Common Stock 2025-07-08 4 A false 24464.00 0.00 A 27404.00 D Stock Option (right to buy) 6.54 2025-07-08 4 A false 50758.00 0.00 A 2035-07-08 Common Stock 50578.00 50758.00 D Received in exchange for 20,000 shares of Akoya Biosciences, Inc. ("Akoya") common stock in connection with the acquisition of Akoya by Quanterix on July 8, 2025. Dr. Lai-Goldman received: (a) 0.1470 of a share of Quanterix common stock and (b) $0.37 in cash, for each share of Akoya common stock. The closing price of the Quanterix common stock on July 8, 2025 was $6.54 per share. The closing price of the Akoya common stock on July 7, 2025 was $1.29 per share. Represents shares of stock issuable on vesting of restricted stock units. The restricted stock units vest as to one-third of the shares on each of July 8, 2026, July 8, 2027 and July 8, 2028. Includes 24,464 restricted stock units. The option vests as to one-third of the shares on July 8, 2026, and the remaining two-thirds of the shares vest monthly thereafter over two years in 24 successive equal installments. /s/ Brian Keane, as Attorney-in-Fact 2025-07-10