Earlier this week I noticed a regulatory filing for Tribeca Venture Partners II, which looked to be targeting $100 million. I certainly had never heard of Tribeca Venture Partners I, but noticed that the firm’s principals looked familiar.

One was Brian Hirsch, a partner with GSA Venture Partners (an early-stage firm that used to be affiliated with Greenhill & Co.). The other was Chip Meakem, a New York-based partner with Boston’s Kodiak Venture Partners.

Here’s what’s happening:

Fortune has learned that Hirsch and Meakem are indeed forming a new firm called Tribeca Venture Partners, to invest in seed and early-stage tech companies in New York City. I’m told that they may hold a first close on the fund as early as today.

At the same time, GSA Venture Partners is effectively shutting down. The investment period for its current fund, a $102 million vehicle raised in 2006, ends today. Once that happens, it will be rolled into the Tribeca platform – where it will be known as Tribeca Venture Partners I. Hirsch will continue to manage the portfolio with GSA vice president Somak Chattopadhyay, who also is joining Tribeca. Hirsch’s GSA partner Steve Brotman is moving on to other endeavors, although I don’t yet know what those are.

Meakem will continue to manage his existing portfolio companies for Kodiak, but will not make new investments for the firm (which doesn’t really have money to make new investments anyway).

Worth noting that, at least for now, Tribeca Venture Partners isn’t actually based in Tribeca. It’s in GSA’s offices on Park Avenue between 50th and 49th streets…

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