Billerica, Mass.-based precision health company Quanterix Corp. said it raised $69 million after underwriters of its previously announced offering fully exercised their overallotment option.

The company sold 2,732,673 common shares, inclusive of the 356,435 additional stock underwriters bought, at $25.25 apiece.

J.P. Morgan Securities LLC and SVB Leerink LLC were acting as joint book-running managers for the offering while Canaccord Genuity LLC was acting as co-manager. Perella Weinberg Partners acted as an independent capital markets adviser to Quanterix for the offering.

This is the second time Quanterix has raised money this year, having generated $49.7 million from the sale of stocks in an at-the-market offering in June.