Investor · Cambridge, MA

John L. Lamattina

Open John in the network graph →

Filings

69

SEC Form D

Connections

220

co-filers

Capital

$112.0M

across filings

Active

Nov 2017

to Jun 2025

Most-connected co-filers (220)

Albert A. Luderer, Ph.D · San Diego, CA35 shared Daniel Brosseau · Montreal, Quebec, Canada35 shared Peter Letko · Montreal, Quebec, Canada35 shared John Frankel · Austin, TX35 shared Richard Simoni · PALO ALTO, CA35 shared Robert Marien · Montreal, Quebec, Canada35 shared Susan M. Dillon · Cambridge, MA35 shared Letko, Brosseau & Associates Inc · Montreal, Quebec, Canada35 shared Jean-Andre Elie · Montreal, Quebec, Canada33 shared Wayne Grinnell · Las Vegas, NV33 shared Aaron Clark · Houston, TX33 shared Thomas Birks · Montreal, Quebec, Canada29 shared Richard Gordon · Camana Bay, Grand Cayman, Cayman Islands29 shared Stuart Orgill · San Francisco, CA17 shared Luke Lee · Scottsdale, AZ17 shared Inspired Healthcare Capital LLC · Scottsdale, AZ17 shared Jean Gattuso · Montreal, Quebec, Canada17 shared Marco M. Buhigas Moran · Madrid, U317 shared Nathalie Claude Baroux Francisci · Montreal, Quebec, Canada17 shared Bernat Olle · Cambridge, MA12 shared Michael D. Rapoport · Exton, PA10 shared Michael J. Morin · Exton, PA9 shared Michael R. Lefenfeld · Exton, PA9 shared Philip R. Wagenheim · Exton, PA9 shared

Recent filings (69)

Letko Brosseau Equity FundJun 2025 · 24 co-filers Letko Brosseau RSP Balanced FundMar 2025 · 24 co-filers Letko Brosseau RSP Equity FundMar 2025 · 24 co-filers Letko Brosseau ESG Fossil Fuel Free Global Equity Fund (US), a series of Letko Brosseau US Funds LPMar 2025 · 24 co-filers Letko Brosseau RSP Bond FundMar 2025 · 24 co-filers Letko Brosseau Emerging Markets Equity Fund (US), a series of Letko Brosseau US Funds LPJan 2025 · 19 co-filers OfferingTree, Inc.Sep 2024 · 10 co-filers$2.2M VEDANTA BIOSCIENCES, INC.Aug 2024 · 35 co-filers$118.5M Letko Brosseau Equity FundJun 2024 · 21 co-filers OfferingTree, SBCJun 2024 · 11 co-filers$700K Letko Brosseau ESG Fossil Fuel Free Global Equity Fund (US), a series of Letko Brosseau US Funds LPMar 2024 · 21 co-filers Letko Brosseau RSP Balanced FundMar 2024 · 21 co-filers Letko Brosseau RSP Equity FundMar 2024 · 21 co-filers Letko Brosseau RSP Bond FundMar 2024 · 21 co-filers Letko Brosseau Emerging Markets Equity Fund (US), a series of Letko Brosseau US Funds LPJan 2024 · 22 co-filers OfferingTree, SBCJun 2023 · 11 co-filers$700K VEDANTA BIOSCIENCES, INC.May 2023 · 35 co-filers$106.5M Letko Brosseau Emerging Markets Equity Fund (US), a series of Letko Brosseau US Funds LPApr 2023 · 22 co-filers Letko Brosseau RSP Balanced FundMar 2023 · 21 co-filers Letko Brosseau RSP Equity FundMar 2023 · 21 co-filers Letko Brosseau ESG Fossil Fuel Free Global Equity Fund (US), a series of Letko Brosseau US Funds LPMar 2023 · 21 co-filers Letko Brosseau RSP Bond FundMar 2023 · 21 co-filers Letko Brosseau ESG Fossil Fuel Free Global Equity Fund (US), a series of Letko Brosseau US Funds LPNov 2022 · 15 co-filers Letko Brosseau RSP Bond FundNov 2022 · 15 co-filers Letko Brosseau RSP Balanced FundNov 2022 · 15 co-filers

Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See John in the interactive graph →