Rivington Labs

IDENTITY RESOLUTION: This profile presented an unusual research challenge: 'Rivington Labs' does not appear anywhere on Greylock Partners' public portfolio page (greylock.com/portfolio), which lists roughly 150 named companies (confirmed by direct fetch — no 'Rivington Labs' entry). It also has zero indexed presence on Bing web search or Bing News search for the exact phrase 'Rivington Labs' (a Bing News search returned 'We didn't find any results for "Rivington Labs"' verbatim), no working company website (rivingtonlabs.com is an unrelated parked/for-sale domain), no LinkedIn company page discoverable, and no TechCrunch/Crunchbase news coverage. Despite this, a real, active, well-capitalized company by this exact legal name was confirmed via two independent primary-source channels: (1) SEC EDGAR, which has two Form D exempt-offering filings for 'Rivington Labs Inc.' (CIK 0002027856), a Delaware corporation incorporated in 2020; and (2) a sparse, auto-generated Crunchbase organization profile (crunchbase.com/organization/rivington-labs) confirming the same legal name, CEO, and Miami address, with a placeholder description ('Rivington Labs is a company') indicating Crunchbase itself has essentially no substantive data either. Given the SEC filings are primary legal documents (not scrapeable/spoofable web content) and independently corroborate the Crunchbase stub on name, CEO, and address, I am confident this is a real company and not a case of mistaken identity — but it is operating in near-total stealth, so most standard profile fields (product, market, tagline, revenue model, employee count, sectors beyond the SEC's generic 'Other Technology' classification) could not be confirmed and are left null rather than guessed.

CORPORATE FACTS: Rivington Labs Inc. is a Delaware corporation, incorporated in 2020, per its own SEC Form D 'year of incorporation' field. Its first Form D (filed 2024-06-25, first sale of securities 2024-06-11) listed a Miami, FL mailing address (382 NE 191st Street, PMB 85604 — a private mailbox/registered-agent-style address) and disclosed an offering of up to $22,524,972, of which $21,624,994 had been sold to 16 investors as of the filing date. Its second Form D (filed 2025-11-24, first sale 2025-11-07) listed a new address at 821 Sansome Street, San Francisco, CA, and disclosed an offering of up to $39,999,950, of which $37,966,294 had been sold to 9 investors. Summing the two 'amount sold' figures yields approximately $59.6M in disclosed venture funding through Reg D offerings (both marked as equity, not debt/SAFEs, per the 'isEquityType' field); because each filing reports the amount sold only as of its filing date and the offerings had unsold remainders at that point, actual totals raised could be modestly higher. No S-1, 8-A, or other SEC filing exists for the company, confirming it remains private and has not pursued a public listing.

LEADERSHIP AND BOARD: Alexander Halliday is CEO, a Director, and a 'Promoter' (SEC Form D terminology for a company co-founder/organizer) in both filings, based in San Francisco per Crunchbase. Matthew Hammel is listed as a Director and Promoter in both filings, suggesting he is a co-founder alongside Halliday (no title beyond 'Director' was disclosed for him). Sandhya Hegde — publicly known as a General Partner at Unusual Ventures (and previously EVP of Marketing & Growth at Amplitude, and a Partner at Khosla Impact, per her own Crunchbase profile) — is listed as a Director in BOTH the 2024 and 2025 filings, suggesting Unusual Ventures has been involved with the company since at least its 2024 round. Bernabe Gonzalez Segredo appears only in the 2024 filing as a 'Promoter' (not a Director), a role that in Reg D filings often denotes an organizer, advisor, or placement-related party rather than an ongoing officer. Mike Duboe — a Greylock Venture Partner — appears ONLY in the 2025 filing as a new Director, replacing Gonzalez Segredo in the relatedPersons list; this is the sole piece of evidence connecting Greylock to the company (see greylock_relationship field above for full caveat).