Insight Partners Leads $100M Series B for Quartermaster
The Arlington, VA company's raise totals $140M once a $40M venture debt facility from Stifel is counted.
Quartermaster has raised $140 million, a package that pairs a $100 million Series B equity round with a $40 million venture debt facility, according to an announcement dated October 2, 2026.
Insight Partners led the Series B. Overmatch Ventures joined as a new investor, and Stifel provided the debt facility. The announcement also names First Round Capital, Quiet Capital, Steel Atlas, TMV, Box Group, and Operator Partners among the additional investors participating in the round.
Quartermaster is based in Arlington, Virginia. The announcement did not disclose the company's product or business model, the valuation at which the Series B was priced, or how the company intends to deploy the new capital.
The deal's most distinctive feature is its structure rather than its size. Of the $140 million total, $100 million arrives as priced equity and $40 million as venture debt from Stifel — meaning the debt facility alone accounts for just under 30% of the announced package. Venture debt of that scale alongside a Series B is a common way for growth-stage companies to extend runway without diluting existing shareholders further, though the announcement gave no indication of how the two instruments will be used relative to one another.
The equity side drew a mix of backers. Insight Partners takes the lead position, with Overmatch Ventures identified as a new participant. The remaining named investors — First Round Capital, Quiet Capital, Steel Atlas, TMV, Box Group, and Operator Partners — appear in the announcement as additional investors, without the disclosure distinguishing which were returning and which were new.
Quartermaster's Series B lands at a moment when later-stage rounds are frequently assembled from multiple instruments rather than a single equity check, and the company's announcement follows that pattern. Beyond the financing details, the disclosure was thin: no headcount figures, no revenue or traction metrics, and no customer or product information accompanied the raise. The $100 million equity round and the $40 million Stifel facility together constitute the $140 million total the company announced.