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), Adam Draper (Boost VC), Michael Dornbrook (Speedy Packets Inc.), Bob Mason (Argonautic Ventures), 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), John Doerr (Kleiner Perkins), Mike Fitzgerald (High Alpha), Steve Case (Revolution)
Circle
Pre SeedDec 2018$800K
$760M
Co-investors: David Orfao (Google Ventures), Terrence Rohan (Index Ventures), Hemant Taneja (General Catalyst), Saar Gur (CRV), Lorenzo Thione (Gaingels), Keith Rabois (Khosla Ventures), Scott Weiss (Andreessen Horowitz), Sam Bankman-Fried (FTX Ventures), Esther Dyson (Union Square Ventures), Zachary Sims (Bowery Capital), David Eckstein (Sequoia Capital), Jenny Fielding (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Scott Hartley (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 (Digital Currency Group), 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
$41M
Co-investors: Clelia Warburg Peters (Era Ventures), Esteban Sosnik (Reach Capital), Matthew Greenfield (Rethink Education), Kevin Talbot (Relay Ventures), Christopher Gabrieli (Unknown Ventures), Charlie Cheever (Export Development Canada | Exportation et développement Canada)
Revio
AngelOct 2016$500K
$9.5M
Co-investors: Scott Hartley (Everywhere Ventures (The Fund)), Jenny Fielding (Everywhere Ventures (The Fund)), Anna Barber (Everywhere Ventures (The Fund)), Gbenga Ajayi (QED Investors), Hayden Simmons (RaliCap), Carey Ransom (Launch House Ventures)
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