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Distinct shells carrying a filed role for this person — not every shell they have ever touched.
SEC-verified vehicles of the same sponsor, predating these roles and carrying none of them. The badge counts them; the figure beside this one does not.
Mergers closed across all 13 — these vehicles and the franchise's earlier ones together.
Announced but not closed, and still hunting — again over all 13.
No closed vehicle here has both a stored price and a filed trust value to score it against.
6 liquidated · 1 terminated deal — weigh against the wins.
1 vehicle on file, newest listing first
none appears on more than one
Risa Stack, Ph.D. has served as one of our directors since July 2024. Since May 2022 Dr. Stack has been a Partner at The Production Board, a company investing in technology businesses across life sciences, agriculture, and software. Previously, Dr. Stack was a Venture Partner at RA Capital, a private equity company focused on healthcare and biotechnologies, from September 2020 to March 2022. Dr. Stack was a founder and served as Chairperson of Menlo Microsystems, Inc., and was a General Manager at General Electric from January 2013 to September 2018. Dr. Stack was a Partner at Kleiner Perkins from June 2003 to December 2012. Prior to joining Kleiner Perkins, she was a Principal at JP Morgan Partners from September 1996 to May 2003. Dr. Stack Dr. Stack served on the boards of Trius Pharmaceuticals, (NASDAQ:TRUS) from March 2008 to June 2013, Metagenomi (NASDAQ MGX) from April 2022 to February 2024, and Corthera, Inc., a biotechnology company (acquired by Novartis AG in 2009) from 2007 to 2009, in addition to many other private biotechnology companies. Dr. Stack received her B.S. in genetics and development from the University of Illinois and her Ph.D. in immunology from the University of Chicago. Dr. Stack was a member of the second class of Kauffman Fellows.
This record is keyed to SEC CIK 0001478728 — the identifier this person files under in their own name. Every vehicle above is a filing made under that CIK, so “the same person on two shells” is a fact about an SEC identifier rather than about a name that happens to match.
Roles are the strings the filings used, in the order they were filed. Nothing on this page ranks them, infers seniority, or offers a reason why any two of these names recur — a recurrence is a count, and the filings that produced it are linked beside every row. We also hold 28 institutional-holder rows on these vehicles, under 17 distinct name strings, and none of them is counted across vehicles: that table has no CIK column, and matching holders by name would merge firms that are not the same firm.