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
48
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), Nick Hunley
Stocksnips
SeedDec 2022$430K
$2.1M
Co-investors: Ven Raju (Innovation Works), Peter Erin (Riverfront Ventures)
Avanlee Care
SeedFeb 2021
Co-investors: Esther Dyson (23andMe), Susan Solinsky
Rheaply
SeedMar 2020$3M
$33M
Co-investors: Bradley Horowitz (Google Ventures), John Doerr (Kleiner Perkins), Brandon Middaugh (Fenice Energy), Mike Fitzgerald (High Alpha), Steve Case (Revolution)
Circle
Pre SeedDec 2018$800K
$760M
Co-investors: Hemant Taneja (General Catalyst), Saar Gur (CRV), David Orfao (General Catalyst), Ron Conway (SV Angel), Keith Rabois (Khosla Ventures), Scott Weiss (Andreessen Horowitz), Zachary Sims (Bowery Capital), David Eckstein (Sequoia Capital), Sam Bankman-Fried (FTX Ventures), Lorenzo Thione (Gaingels), Scott Hartley (Everywhere Ventures (The Fund)), Jenny Fielding (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Clifford Holekamp (Cultivation Capital), Mark Goldstein (Builders VC), Nicholas Chirls (Notation Capital), Glenn Hutchins (North Island Ventures), Ankur Nagpal (Vibe Capital), Matthew Ziskie (Bungalow Capital), David Ambrose (Steadfast Venture Capital), Raj Date (Fenway Summer), Barry Silbert (Digital Currency Group), Jamie Goldstein (Pillar VC), Esther Dyson (23andMe), Ziv Reichert (Latitude), Terrence Rohan (Otherwise Fund), Scott Belsky (A24), Ronald Conway Sr. (NewCo), Yuri Milner (DST Global), Brian Pokorny (SV Angel LLC), Ashton Kutcher (Sound Ventures), David Sacks (Craft Ventures), Shervin Pishevar (Craft Ventures), Paul Buchheit (Y Combinator), Naval Ravikant (Sm4rt Predictive Systems), Sahin Boydas (Angel investor), J J (GreaterGoodSociety), Sahil Lavingia, Sam Palmisano, Mathilde Collin
Immersed
Pre SeedDec 2017$340K
$17M
Co-investors: David Murray-Hundley (Pario Ventures), Brian Luerssen (LongJump VC), Ozzy Akay, Joshua Webster
Mainstay
SeedDec 2016$250K
Convertible NoteAug 2016$730K
$23M
Co-investors: Matthew Greenfield (Rethink Education), Esteban Sosnik (Reach Capital), Kevin Talbot (Relay Ventures), Charlie Cheever, Christopher Gabrieli
Revio
AngelOct 2016$500K
$9.5M
Co-investors: Anna Barber (Everywhere Ventures (The Fund)), Gbenga Ajayi (QED Investors), Scott Hartley (Everywhere Ventures (The Fund)), Jenny Fielding (Everywhere Ventures (The Fund)), Carey Ransom (Launch House Ventures), Hayden Simmons (rali_cap)