Investing Profile

Walter Winshall

AngelInvestor
Founder of Collaborative Seed and Growth Partners
Boston, Massachusetts
Photo of Walter Winshall, Angel at Collaborative Seed & Growth Partners

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$10K - $500K
$100K
49
CompanyStageDateRound SizeTotal Raised
RISE Robotics
Series AApr 2025$2M
SeedAug 2012$2M
$7M
Co-investors: Reed Sturtevant (The Engine), Michael Dornbrook (Speedy Packets Inc.), Bob Mason (Argonautic Ventures), Adam Draper (Boost VC)
Stocksnips
SeedDec 2022$430K
$2.1M
Co-investors: Ven Raju (Innovation Works), Peter Erin (Riverfront Ventures)
Avanlee Care
SeedFeb 2021
Co-investors: Esther Dyson (HealthWorldWeb LLC), Susan Solinsky
Rheaply
SeedMar 2020$3M
$33M
Co-investors: Bradley Horowitz (Google Ventures), Mike Fitzgerald (High Alpha), Brandon Middaugh (Microsoft), Steve Case (Revolution), John Doerr (Kleiner Perkins)
StoryFit
Series ADec 2019
$7.8M
Co-investors: Anton Simunovic (Alumni Ventures ), Gregory Baker (Bascom Ventures), Dan Conner (Ascend Venture Capital), Tim Schigel (Refinery Ventures), Marco A. Casas
Circle
Pre SeedDec 2018$800K
$760M
Co-investors: David Orfao (General Catalyst), Sam Bankman-Fried (FTX Ventures), Ron Conway (SV Angel), Lorenzo Thione (Gaingels), Hemant Taneja (General Catalyst), Keith Rabois (Khosla Ventures), David Eckstein (Sequoia Capital), Saar Gur (CRV), Zachary Sims (Bowery Capital), Scott Weiss (Andreessen Horowitz), Scott Hartley (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Jenny Fielding (Everywhere Ventures (The Fund)), Raj Date (Fenway Summer), Barry Silbert (Digital Currency Group), Ankur Nagpal (Vibe Capital), Matthew Ziskie (Bungalow Capital), David Ambrose (Steadfast Venture Capital), Glenn Hutchins (North Island Ventures), Nicholas Chirls (Notation Capital), Ronald Conway Sr. (NewCo), Yuri Milner (DST Global), Brian Pokorny (SV Angel LLC), Ashton Kutcher (Sound Ventures), David Sacks (Craft Ventures), Shervin Pishevar (ACME Capital), Paul Buchheit (Y Combinator), Naval Ravikant (Sm4rt Predictive Systems), Terrence Rohan (Otherwise Fund), Scott Belsky (A24), J J (GreaterGoodSociety), Ziv Reichert (LocalGlobe), Esther Dyson (HealthWorldWeb LLC), Jamie Goldstein (Pillar VC), Mark Goldstein (Builders VC), Sahin Boydas (Angel investor), Clifford Holekamp (Cultivation Capital), Sam Palmisano, Sahil Lavingia, Mathilde Collin
Immersed
Pre SeedDec 2017$340K
$17M
Co-investors: Brian Luerssen (LongJump VC), David Murray-Hundley (Pario Ventures), Joshua Webster, Ozzy Akay
Mainstay
SeedDec 2016$250K
Convertible NoteAug 2016$730K
$23M
Co-investors: Esteban Sosnik (Reach Capital), Kevin Talbot (Relay Ventures), Matthew Greenfield (Rethink Education), Christopher Gabrieli, Charlie Cheever