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), Nick Hunley
Stocksnips
SeedDec 2022$430K
$2.1M
Co-investors: Ven Raju (Innovation Works), Peter Erin (Riverfront Ventures)
Avanlee Care
SeedFeb 2021
Co-investors: Susan Solinsky (Lerer Hippeau), Esther Dyson (EPAM Systems)
Rheaply
SeedMar 2020$3M
$33M
Co-investors: Bradley Horowitz (Google Ventures), Mike Fitzgerald (High Alpha), Steve Case (Revolution), John Doerr (Kleiner Perkins), Brandon Middaugh (Fenice Energy)
Circle
Pre SeedDec 2018$800K
$760M
Co-investors: David Orfao (Google Ventures), Saar Gur (CRV), Lorenzo Thione (Gaingels), Hemant Taneja (General Catalyst), Ron Conway (SV Angel), Keith Rabois (Khosla Ventures), Scott Weiss (Andreessen Horowitz), Sam Bankman-Fried (FTX Ventures), Terrence Rohan (Index Ventures), Zachary Sims (Bowery Capital), David Eckstein (Sequoia Capital), Scott Hartley (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Jenny Fielding (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 (Grayscale Investments), Jamie Goldstein (Pillar VC), Esther Dyson (EPAM Systems), Ziv Reichert (Latitude), 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 (ACME Capital), Paul Buchheit (Y Combinator), Naval Ravikant (Sm4rt Predictive Systems), Sahin Boydas (Angel investor), J J (GreaterGoodSociety), Sam Palmisano, Mathilde Collin, Sahil Lavingia
Immersed
Pre SeedDec 2017$340K
$17M
Co-investors: Jason Syversen (10X Venture Partners), Brian Luerssen (LongJump VC), David Murray-Hundley (Space Tech Ventures), Ozzy Akay, Joshua Webster
Mainstay
SeedDec 2016$250K
Convertible NoteAug 2016$730K
$23M
Co-investors: Christopher Gabrieli (Bessemer Venture Partners), Esteban Sosnik (Reach Capital), Matthew Greenfield (Rethink Education), Kevin Talbot (Relay Ventures), Charlie Cheever
Revio
AngelOct 2016$500K
$9.5M
Co-investors: Jenny Fielding (Everywhere Ventures (The Fund)), Scott Hartley (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Gbenga Ajayi (QED Investors), Hayden Simmons (RaliCap), Carey Ransom (Operate)
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