Keith Grinstein
Angel Investor
Keith Grinstein is a startup investor. Sadly, Mr Keith Grinstein passed away in September 2008. Here's a link:http://seattletimes.nwsource.com/html/localnews/2008214675_grinsteinobit30.html*************Mr. Grinstein has more than fifteen years of executive and board experience spanning across the telecommunications, the Internet, and venture capitalindustries. He currently serves as chairman of Coinstar Inc. (NASDAQ: CSTR) and as a member of the board directors and audit committees of F5 Networks (NASDAQ: FFIV), Labor Ready (NYSE: LRW), and Nextera (NASDAQ: NXRA).Mr. Grinstein is a partner of Second Avenue Partners, a venture capital firm which is focused on emerging Internet businesses. He has held a number of senior executive positions, serving previously as Nextel International Inc.'s president and chief executive officer and prior to that president and chief executive officer of the Aviation Communications Division of AT&T Wireless (formerly McCaw Cellular Communications).Mr. Grinstein is an experienced public company audit committee member and has lectured extensively on Sarbanes-Oxley compliance. In 2003, Mr. Grinstein testified in front of the US Senate Banking Committee on behalf of NASDAQ small and mid-cap companies regarding the effects of Sarbanes-Oxley legislation. Mr. Grinstein is also a frequent lecturer on Section 404 of Sarbanes-Oxley, executive compensation and director duties; and has lectured on director duties at the University of Washington Business School and Seattle University Law School.A successful venture capitalist, Mr. Grinstein was a seed-capital investor in Amazon.com (NASDAQ: AMZN). He is a founding partner of Second Avenue Partners, a VC group funding Pacific Northwest early-stage companies. In addition, he has been a driving force behind structuring a number of leading companies including Pathogenesis, VaxGen (VXGN: PK), Tegic, HouseValues (NASDAQ: SOLD), Wireless Services, Nordstrom.com of Nordstrom Inc. (NYSE: JWN), Superconductor Collider Corporation, Neah Power (NPWS: PK), Insitu, and Ice Energy.Mr. Grinstein holds a B.A. in education from Yale University and a J.D. magna cum laude from Georgetown University Law Center.
Last updated:
For AI agents: llms.txt
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Access 48,091 investors
822 industries, 177 countries. Updated daily. Emails and phones included.
Browse database — It's Free!
Find investors for your startup
Search 48,091 investors by industry and country. Emails and phones included.
FAQ
How do I contact Keith Grinstein?
For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
Contact your first 100 investors today
Find who invests in your industry, stage, and country. Download investor list with emails in 5 minutes.
Find investors — It's Free!
Continue with Google
Continue with LinkedIn
