General Info
Sol Bier is the Founding Partner of Factorial Funds. He previously worked at Anthropic as an Investor – Series C. Sol Bier attended Harvard …
Location: Los Angeles
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Investment Stages: late-stage, pre-seed, seed, series-a
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🤖 AI Activity Report
Status: very-active
AI Reasoning: I found recent evidence of investments connected to Sol Bier and Factorial Funds: a PR Newswire release on May 20, 2025 announcing Factorial Funds Fund II and listing portfolio companies backed by Fund I including Anthropic and others; Sol Bier’s public posts (LinkedIn/X) show investments such as Anthropic (post on May 23, 2023) and a LinkedIn post on June 10, 2025 mentioning an investment into Anduril. The most recent verifiable investment activity tied to Sol Bier/Factorial Funds is June 10, 2025 (Anduril post) which is less than 6 months prior to the reference date, so classify as very-active.
Angel activity thresholds:
Low Activity – Only known angel investments more than 12 months ago.
Active – Known angel investments between the last 12 and 6 months.
Very Active – Known angel investments in the last 6 months.
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