Lyell Immunopharma: ARCH buys 2.32M common shares
The purchase was made under a securities purchase agreement dated November 3, 2026.
Sentiment and the balance of points
Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
Form Type
4
Rhea-AI Filing Summary
Lyell Immunopharma, Inc. (LYEL) reports that ARCH Venture Fund XIII, L.P. purchased 2,321,262 common shares on November 4, 2026, at $10.77 per share. The fund directly holds the shares. ARCH Venture Partners XIII, L.P. and ARCH Venture Partners XIII, LLC may be deemed beneficial owners; investment committee members Keith Crandell, Robert Nelsen, Kristina Burow, Paul Berns and Steven Gillis may be deemed to share power to direct voting and disposition. Those general partners and committee members disclaim beneficial ownership except to the extent of any pecuniary interest.
Insider Trade Summary
Net Buyer: 2,321,262 shares
Net Buy
1 txn
Insider
ARCH Venture Partners IX, LLC, ARCH Venture Fund IX, L.P., ARCH Venture Partners IX, L.P., ARCH Venture Fund IX Overage, L.P., ARCH Venture Partners IX Overage, L.P.
Role
10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner
Bought
2,321,262 shs ($25.00M)
Increase in Position
162.7%
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Common Stock F1, F2 | 2,321,262 | $10.77 | $25.00M |
| Holding | Common Stock F3 | -- | -- | -- |
| Holding | Common Stock F4 | -- | -- | -- |
Holdings After Transaction:
Common Stock — 5,568,424 shares (Indirect, See Footnote)
Holdings Before and After:
Common Stock, 3,247,162 to 5,568,424 shares (Indirect, See Footnote)
Other Insiders: 1 other insider reported open-market purchases of this stock in the 30 days up to this filing.
Footnotes (4)
- F1. These shares were purchased on November 4, 2026 pursuant to a securities purchase agreement dated November 3, 2026 at a price per share of $10.77.
- F2. These shares are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Keith Crandell, Robert Nelsen, Kristina Burow, Paul Berns and Steven Gillis are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.
- F3. These shares are directly held by ARCH Venture Fund IX, L.P. ("ARCH IX"). ARCH Venture Partners IX, L.P. ("GPLP"), as the sole general partner of ARCH IX, may be deemed to beneficially own the shares held by ARCH IX. ARCH Venture Partners IX, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by ARCH IX. As managing directors of GPLLC, each of Keith Crandell, Robert Nelsen and Clinton Bybee (the "ARCH Managing Directors"), may be deemed to beneficially own the shares held by ARCH IX. Each of GPLP, GPLLC and the ARCH Managing Directors disclaims beneficial ownership of the securities reported herein, except to the extent of their pecuniary interest therein, if any.
- F4. These shares are directly held by ARCH Venture Fund IX Overage, L.P. ("ARCH Overage"). ARCH Venture Partners IX Overage, L.P. ("Overage GPLP"), as the sole general partner of ARCH Overage, may be deemed to beneficially own the shares held by ARCH Overage. GPLLC, as the sole general partner of Overage GPLP, may be deemed to beneficially own the shares held by ARCH Overage. As managing directors of GPLLC, each of the ARCH Managing Directors may be deemed to beneficially own the shares held by ARCH Overage. Each of Overage GPLP, GPLLC and the ARCH Managing Directors disclaims beneficial ownership of the securities reported herein, except to the extent of their pecuniary interest therein, if any.
Key Figures
Common shares purchased: 2,321,262 shares
Purchase price per share: $10.77 per share
Securities purchase agreement date: November 3, 2026
3 metrics
Common shares purchased
2,321,262 shares
ARCH Venture Fund XIII, L.P., November 4, 2026
Purchase price per share
$10.77 per share
Purchase on November 4, 2026
Securities purchase agreement date
November 3, 2026
Agreement for the share purchase
Key Terms
securities purchase agreement, beneficial ownership, pecuniary interest, investment committee
4 terms
securities purchase agreement financial
"pursuant to a securities purchase agreement dated November 3, 2026"
A securities purchase agreement is a written contract between a buyer and a seller outlining the terms for buying or selling financial assets such as stocks or bonds. It specifies details like the price, quantity, and conditions of the transaction, similar to a shopping list with agreed-upon terms. For investors, it provides clarity and legal protection when transferring ownership of these financial instruments.
beneficial ownership regulatory
"disclaims beneficial ownership except to the extent"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of their pecuniary interest therein, if any"
investment committee technical
"members of the investment committee of AVP XIII LLC"
An investment committee is a small group of experienced people who set the rules and make the key decisions about what investments to buy, hold, or sell for a fund, pension, or portfolio. Think of them as the steering team that balances goals, potential returns and risk—their choices shape how much money investors are likely to gain or lose and provide consistent oversight so decisions aren’t made impulsively.
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