Private company

RayzeBio, Inc.

American pharmaceutical preparations company based in San Diego. Summary from the record

Last updated Oct 19, 2026.

Overview

  • IndustryPharmaceutical Preparations1
  • HeadquartersSan Diego, California1
  • Incorporated inDE2
  • Business address5505 Morehouse Drive, Suite 300, San Diego, Ca 921212
  • Filer category, Emerging growth company2
  • Legal formCorporation

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Leadership

Who has led RayzeBio, Inc., and when. Pick a name to see everywhere that person has worked.

Chief executive

  1. Kenneth Song2023–2024

President

  1. Kenneth Song2023–2024

Chief financial officer

  1. Arvind Kush2023–2024
2025
Board members and other officers (10)

Named in SEC Form D filings

People the company listed in its private-offering notices.

  • Executive OfficerAubrey Haddach named Sep 22, 202214
  • DirectorAaron Kantoff named Sep 22, 202214
  • DirectorAlex Rosen named Sep 22, 202214
  • DirectorJerel Davis named Sep 22, 202214

Timeline

  1. Sep 14, 2023New chief executive Kenneth Song becomes CEO3

Filings

96 filings to the SEC since October 2021: 1 quarterly reports, 5 major events, 41 insider forms, 7 large holders, 1 private raises, 41 other. The latest 20:

  1. Mar 7, 202415-12G EDGAR
  2. Feb 28, 20244 EDGAR
  3. Feb 28, 20244 EDGAR
  4. Feb 28, 2024SC 13G/A EDGAR
  5. Feb 27, 20244 EDGAR
  6. Feb 27, 20244 EDGAR
  7. Feb 27, 20244 EDGAR
  8. Feb 27, 20244 EDGAR
  9. Feb 27, 20244 EDGAR
  10. Feb 27, 20244 EDGAR
  11. Feb 27, 20244 EDGAR
  12. Feb 27, 20244 EDGAR
  13. Feb 27, 20244 EDGAR
  14. Feb 27, 20244 EDGAR
  15. Feb 26, 2024S-8 POS EDGAR
  16. Feb 26, 20248-K EDGAR
  17. Feb 23, 2024SC 14D9/A EDGAR
  18. Feb 16, 2024CORRESP EDGAR
  19. Feb 14, 2024SC 14D9/A EDGAR
  20. Feb 14, 2024SC 13G/A EDGAR

The 96 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

3 open-market trades by officers, directors and large owners since October 2021: 3 buys and 0 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Sep 19, 2023Katabi MahaDirectorBuy472,222$18.00$8.5MForm 4
Sep 19, 2023Viking Global Opportunities Drawdown GP LLC10% ownerBuy1,388,889$18.00$25.0MForm 4
Sep 19, 2023Shabet Rose Sharon10% ownerBuy1,388,889$18.00$25.0MForm 4

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Money raised

Private offerings the company reported to the SEC on Form D.

  1. Aug 25, 2022Raised $167.9 million in a private offering of equity Form D: 18 investors so far Form D

Sources

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