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 (Interchange Capital Partners)
Avanlee Care
SeedFeb 2021
Co-investors: Susan Solinsky (Lerer Hippeau), Esther Dyson (Union Square Ventures)
Rheaply
SeedMar 2020$3M
$33M
Co-investors: Bradley Horowitz (Google Ventures), Brandon Middaugh (Prelude Ventures), Mike Fitzgerald (High Alpha), Steve Case (Revolution), John Doerr (Kleiner Perkins)
Circle
Pre SeedDec 2018$800K
$760M
Co-investors: David Orfao (Google Ventures), Saar Gur (CRV), Lorenzo Thione (Gaingels), Hemant Taneja (General Catalyst), Keith Rabois (Khosla Ventures), Scott Weiss (Andreessen Horowitz), Sam Bankman-Fried (FTX Ventures), Esther Dyson (Union Square Ventures), Terrence Rohan (Index Ventures), Zachary Sims (Bowery Capital), David Eckstein (Sequoia Capital), 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 (USVC), Matthew Ziskie (Bungalow Capital), David Ambrose (Steadfast Venture Capital), Raj Date (Fenway Summer), Barry Silbert (Grayscale Investments), Jamie Goldstein (Pillar VC), Ziv Reichert (Latitude), Scott Belsky (A24), 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), Ron Conway (Angel Investors LP Funds), 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), Joshua Webster (levy), Ozzy Akay
Mainstay
SeedDec 2016$250K
Convertible NoteAug 2016$730K
$23M
Co-investors: Christopher Gabrieli (Bessemer Venture Partners), Kevin Talbot (Relay Ventures), Esteban Sosnik (Reach Capital), Matthew Greenfield (Rethink Education), Charlie Cheever (Export Development Canada | Exportation et développement Canada)
Revio
AngelOct 2016$500K
$9.5M
Co-investors: Gbenga Ajayi (QED Investors), Anna Barber (Everywhere Ventures (The Fund)), Scott Hartley (Everywhere Ventures (The Fund)), Jenny Fielding (Everywhere Ventures (The Fund)), Hayden Simmons (RaliCap), Carey Ransom (Operate)
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