General Partner at Spark Capital; named partner on Formation Bio’s October 2018 venture round; investment focus in AI and healthcare. Spark Capital led Anthropic’s $450 million Series C, placed a GP (Yasmin Razavi) on Anthropic’s board, hired OpenAI’s former Head of Product (Fraser Kelton) as a venture partner, and participated in the Anthropic round alongside Sound Ventures — another Formation Bio investor. Reed sits at the intersection of the AI competitive divide through Spark’s dual positioning.
William “Will” Reed is a General Partner at Spark Capital, a multi-stage venture capital firm managing approximately $15 billion in assets with offices in San Francisco, New York, and Boston. Reed has been a General Partner since 2015 and helps lead Spark’s growth business. His stated investment focus areas include AI, healthcare, fintech, and vertical software. He holds a Bachelor of Arts from Amherst College [1] [2].
Before joining Spark Capital, Reed worked in investment banking at Bank of America Merrill Lynch and in investing at Welsh, Carson, Anderson & Stowe, a healthcare-focused private equity firm. This healthcare private equity background distinguishes Reed from many generalist venture partners and provides context for his involvement in Formation Bio, a healthcare-AI company. His approach has been described as “first-principles investing that runs counter to pattern-matching in Silicon Valley” [3].
Reed’s notable investments at Spark include Discord, Benchling (biotech software), Abridge (healthcare AI), Scale AI, SmartRent, Handshake, Instabase, and Catalyst. Several of these — Benchling, Abridge, and Formation Bio — sit at the intersection of healthcare and AI, suggesting a deliberate investment thesis in that space [4].
Formation Bio Investment
Reed is the named Spark Capital partner on Formation Bio’s October 2018 venture round, alongside Wesley Chan (Felicis), Ashton Kutcher/Guy Oseary (Sound Ventures), Scooter Braun (TQ Ventures), and the continuing positions of Sequoia Capital and Thrive Capital. Spark Capital is not listed as a named participant in the Series C (September 2021) or Series D (June 2024) on the primary Crunchbase investor data, though Spark Capital does appear in some Formation Bio investor listings for later rounds [5].
Reed’s healthcare private equity background at Welsh Carson — a firm that specializes in healthcare services, technology, and information services investments — provides the sectoral expertise that would support an early-stage bet on a clinical trial technology company. Welsh Carson has invested in healthcare companies across the value chain, making Reed one of the few Formation Bio investors with direct prior experience in healthcare deal-making at the institutional level.
Spark Capital and the AI Competitive Divide
Spark Capital’s positioning across the AI landscape is the primary reason Reed’s profile is significant to this investigation. The firm occupies a rare structural position:
Anthropic: Spark Capital led Anthropic’s $450 million Series C in May 2023 at a valuation of approximately $4.1 billion. As part of the round, Spark GP Yasmin Razavi joined Anthropic’s board of directors. Anthropic is an AI company founded by former OpenAI employees Dario and Daniela Amodei, and is widely viewed as OpenAI’s primary competitor. Anthropic’s founding was motivated by disagreements with OpenAI’s direction, particularly regarding safety and commercialization [6] [7].
Fraser Kelton: Shortly before leading the Anthropic Series C, Spark Capital hired Fraser Kelton as a venture partner. Kelton was OpenAI’s former Head of Product and was also described as a “previous Anthropic investor.” A single person who led product at OpenAI, invested in Anthropic personally, and then joined the venture firm that led Anthropic’s largest round — carrying knowledge of both companies’ product strategies, competitive positioning, and organizational dynamics [8].
Sound Ventures: Anthropic’s Series C participants included Sound Ventures (Ashton Kutcher/Guy Oseary), which also invested in Formation Bio’s venture round AND holds a position in OpenAI through its dedicated AI fund. Spark and Sound are co-investors in both Anthropic AND Formation Bio — two firms on the same cap tables on both sides of the AI divide [6].
Formation Bio: Through Reed’s venture round investment, Spark Capital holds (or held) a position in a company that partners commercially with OpenAI (Muse, November 2024). Spark simultaneously holds a board-level position in Anthropic, OpenAI’s primary competitor.
The structural diagram:
Spark Capital
├── Formation Bio (venture round, Reed as named partner)
│ └── Partners commercially with OpenAI (Muse, 2024)
├── Anthropic (Series C lead, Razavi on board)
│ └── OpenAI's primary competitor
└── Fraser Kelton (venture partner)
├── Former: OpenAI Head of Product
└── Former: Anthropic personal investor(Anthropic conflict flag: This is the deepest documented instance of the cross-competitive conflict in the investigation. Spark Capital has board-level governance influence at Anthropic AND an investment in a company that does commercial business with OpenAI. A GP sits on Anthropic’s board. A venture partner has worked at OpenAI and invested in Anthropic. Another GP invested in a company that partners with OpenAI. Information about OpenAI’s commercial strategy with Formation Bio could theoretically reach a firm that governs Anthropic.)
Spark Capital Broader Network
Spark Capital was founded in 2005 and has raised eight early-stage funds and five growth funds. Notable portfolio companies beyond those already mentioned include Twitter (early investor), Oculus (VR, acquired by Facebook), Slack, Coinbase, Postmates, and Trello. The firm’s $15 billion in AUM positions it as one of the larger generalist venture firms in the U.S. [9].
Spark Capital’s co-investment with the OpenAI Startup Fund in other deals creates an additional connection point between Spark and the OpenAI ecosystem, beyond the Formation Bio investment and the Kelton hire. The specific co-investments with the OpenAI Startup Fund have been documented in prior investigation sessions but the details require verification in this context.
Nodes / Open Questions
- What is the current status of Spark’s Formation Bio position? Did Spark participate in the Series C or Series D, or was the involvement limited to the venture round?
- Does Reed have a board seat or observer rights at Formation Bio?
- Reed’s prior employer Welsh Carson Anderson & Stowe is a healthcare PE firm. Does Welsh Carson have any positions in pharmaceutical companies that Formation Bio has acquired drugs from or licensed drugs to?
- Yasmin Razavi sits on Anthropic’s board. Does Razavi have visibility into Anthropic’s competitive intelligence regarding OpenAI’s commercial partnerships? Would the Formation Bio/Muse partnership constitute information that could reach Razavi through Spark’s internal information flows?
- Fraser Kelton was OpenAI’s Head of Product and a personal Anthropic investor before joining Spark. What is Kelton’s current role at Spark and does he have any involvement with the Formation Bio position?
- How does Spark manage potential conflicts between its Anthropic board position and its investments in companies that do business with OpenAI?
- Spark’s co-investments with the OpenAI Startup Fund — which companies and what is the nature of the co-investment relationship?
- Reed’s Amherst College background — does Amherst connect to any other network nodes?
Sources
- [Archive] (https://www.willreed.fyi/)
- [Archive] (https://en.wikipedia.org/wiki/Spark_Capital)
- [Archive] (https://me.sh/profile/william-reed)
- [Archive] (https://www.evalyze.ai/investors/william-reed)
- [Archive] (https://www.linkedin.com/in/kareemzaki)
- [Archive] (https://techcrunch.com/2023/05/23/anthropic-raises-350m-to-build-next-gen-ai-assistants)
- [Archive] (https://anthropic.com/news/anthropic-series-c)
- [Archive] (https://voicebot.ai/2023/05/24/anthropic-raises-450m-to-accelerate-generative-ai-assistant-development/)
- [Archive] (https://en.wikipedia.org/wiki/Spark_Capital)