Ray Therapeutics Funding, Investors & Competitors

Ray Therapeutics has raised $231M across 3 funding rounds, most recently a $125M Series B in April 2026.

Last Ray Therapeutics funding round

$125M

Series B · Apr 2026

Cumulative funding Ray Therapeutics raised

$231M

across 3 funding rounds

Key investors in Ray Therapeutics

  • 4BIO Capital
  • Norwest
  • Novo Holdings
  • Deerfield
  • MRL Ventures Fund
  • Invus
  • Putnam Premier IT
  • Janus Henderson

Ray Therapeutics Overview

About Ray Therapeutics

Ray Therapeutics is a San Francisco-headquartered biotechnology company developing optogenetic gene therapies to restore vision in patients with inherited retinal diseases such as retinitis pigmentosa and Leber congenital amaurosis. Its platform uses light-sensitive proteins delivered via AAV vectors to reactivate dormant retinal cells.


Founded

2021

HQ

United StatesSan Diego, CA

Status

Privately held

Customer focus

B2B

Revenue model

Licensing

Ray Therapeutics Funding History

Ray Therapeutics has raised a total of $231M across 3 funding rounds.

Ray Therapeutics' first fundraising round was a $6M seed round in January 2022. The most recent completed round was a $125M Series B in April 2026.

Ray Therapeutics funding rounds

Ray Therapeutics funding rounds
DateStageInvestorsRaisedDeal Summary
Apr 2026Series BJanus Henderson (lead); Putnam Premier IT; Novo Holdings; Invus; Marshall Wace; Norwest; MRL Ventures Fund; Adage Capital Management; Platanus; Deerfield; 4BIO Capital$125MRay Therapeutics closed an upsized and oversubscribed $125 million Series B financing round on April 21, 2026. The round was led by Janus Henderson Investors, with participation from new investors Adage Capital Management, Franklin Templeton, Invus, and Marshall Wace, alongside follow-on investments from existing backers including 4BIO Capital, Deerfield Management, MRL Ventures Fund, Norwest, Novo Holdings, and Platanus. Proceeds will fund late-stage clinical development and commercial readiness for lead program RTx-015 targeting Retinitis Pigmentosa, as well as ongoing clinical studies for RTx-021 in Stargardt Disease and Geographic Atrophy. The financing supports Ray Therapeutics' optogenetic gene therapy pipeline for blinding retinal diseases. Ray Therapeutics, a Berkeley, California-based clinical-stage biopharmaceutical company, develops differentiated vision restoration therapies for patients with severe retinal degenerations including Retinitis Pigmentosa and macula diseases. The company previously raised $100 million in a Series A round in May 2023 led by Novo Holdings, bringing total disclosed funding to $225 million.
May 2023Series ANovo Holdings (lead); Norwest; MRL Ventures Fund; Wu Capital; Deerfield; 4BIO Capital$100MRay Therapeutics is a San Francisco-based biotechnology company founded in 2021, developing novel optogenetic gene therapies to restore visual function in patients with blinding diseases such as retinitis pigmentosa and macular degeneration. The company's lead product makes other neuronal cell types in the eye light-sensitive without requiring goggles or light-enhancing devices, positioning it as a potential best-in-class vision restorative therapeutic with strong preclinical data. On May 16, 2023, Ray Therapeutics closed an oversubscribed $100 million Series A financing round led by Novo Holdings, with participation from Deerfield Management, Norwest Venture Partners, Platanus, MRL Ventures Fund (Merck & Co.'s corporate venture fund), and existing investor 4BIO Capital. The funding will advance multiple programs targeting blinding diseases through clinical development. Prior to this, the company raised a $6 million seed round from 4BIO Capital and received approximately $4 million in grants from the California Institute for Regenerative Medicine, bringing total funding to around $114 million across four rounds as of late 2023. Ray Camahort from Novo Holdings, Tiba Aynechi from Norwest, and Hannah Chang from Platanus joined the board, with Brian Chow from Deerfield and Jason Ruth from MRL Ventures as observers. The company emphasizes its next-generation technology platform and world-class genetic medicines team to address unmet needs in inherited retinal diseases, aiming to restore higher visual function and quality of life for blind patients left behind by other therapies.
Jan 2022Seed4BIO Capital (lead)$6MRay Therapeutics is a biotechnology company developing optogenetic gene therapies for patients with blinding diseases, including retinitis pigmentosa. Its lead candidate, Ray-001, is a mutation-agnostic, one-time intravitreal injection designed to restore vision and last a lifetime. In January 2022, Ray Therapeutics raised a $6 million seed financing round led by 4BIO Capital to advance its optogenetic gene therapy platform, pipeline, and team, specifically to progress Ray-001 into clinical trials. The company later received a $4 million grant from the California Institute for Regenerative Medicine in April 2022 to support Ray-001 development and secured an oversubscribed $100 million Series A round led by Novo Holdings, with participation from Deerfield Management, Norwest Venture Partners, Platanus, MRL Ventures Fund, and 4BIO Capital.

Who has invested in Ray Therapeutics?

12 investors have backed Ray Therapeutics across its funding rounds, including 4BIO Capital, Norwest, Novo Holdings, Deerfield, MRL Ventures Fund and Invus.

Lead investors include Janus Henderson, Novo Holdings and 4BIO Capital.


Ray Therapeutics Investors

Investors in Ray Therapeutics by funding rounds participated
InvestorHQRoundsRoleFirst check
4BIO CapitalUnited KingdomLondon3LeadJan 2022
Novo HoldingsDenmarkCopenhagen2LeadMay 2023
NorwestUnited StatesSan Francisco, CA2ParticipantMay 2023
MRL Ventures FundUnited StatesUnited States2ParticipantMay 2023
DeerfieldUnited StatesNew York City, NY2ParticipantMay 2023
Putnam Premier ITUnited StatesUnited States1ParticipantApr 2026
InvusUnited StatesNew York City, NY1ParticipantApr 2026
Marshall WaceUnited KingdomLondon1ParticipantApr 2026
Janus HendersonUnited StatesLondon1LeadApr 2026
Adage Capital ManagementUnited StatesUnited States1ParticipantApr 2026

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Ray Therapeutics Competitors

Ray Therapeutics competitors include listed companies like Johnson & Johnson, Roche, Merck KGaA and Illumina, and private ones like Biosplice Therapeutics and Biomat USA.

Public and private companies comparable to Ray Therapeutics
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
Johnson & JohnsonUnited StatesUnited StatesPublicly listed$94B$40B$651B6.8x
RocheSwitzerlandSwitzerlandPublicly listed$77B$26B$351B4.9x
Merck KGaAGermanyGermanyPublicly listed$24B$5.3B$66B3.1x
IlluminaUnited StatesUnited StatesPublicly listed$4.3B$1.4B$37B8.4x
Biosplice TherapeuticsUnited StatesSan Diego, CAPrivate--$12B-
Biomat USAUnited StatesLos Angeles, CAPrivate--$4.2B-

Ray Therapeutics Public Comps

Ray Therapeutics is still privately-owned, but its public comps include Samsung, Eli Lilly, Johnson & Johnson, AbbVie, Merck, Roche, Novartis, AstraZeneca, Thermo Fisher Scientific and Siemens.

Last FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Samsung$243B$67B4.4x2.4x15.8x4.4x
Eli Lilly$65B$28B16.5x13.1x38.7x27.0x
Johnson & Johnson$94B$40B7.2x6.8x17.0x18.3x
AbbVie$61B$17B8.7x8.1x30.6x17.6x
Merck$65B$28B6.3x6.2x14.7x21.0x
Roche$77B$26B5.0x4.9x14.6x12.4x
Novartis$57B$22B5.5x5.5x14.2x13.3x
AstraZeneca$59B$19B4.8x4.5x14.6x12.7x

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Common questions about Ray Therapeutics

When was Ray Therapeutics founded?Ray Therapeutics was founded in 2021.
Where is Ray Therapeutics headquartered?Ray Therapeutics is headquartered in San Diego, CA, United States.
Is Ray Therapeutics publicly listed?No, Ray Therapeutics is a private, VC-backed company.
How much funding has Ray Therapeutics raised?Ray Therapeutics has raised $231M across 3 funding rounds.
What was Ray Therapeutics' last funding round?Ray Therapeutics' last funding round was a $125M Series B in April 2026, led by Janus Henderson.
Who are Ray Therapeutics' investors?Ray Therapeutics' investors include 4BIO Capital, Novo Holdings, Norwest, MRL Ventures Fund, Deerfield, Putnam Premier IT, Invus, Marshall Wace, Janus Henderson, Adage Capital Management and 2 others.
Which companies are comparable to Ray Therapeutics?Companies comparable to Ray Therapeutics include Johnson & Johnson, Roche, Merck KGaA, Illumina, Biosplice Therapeutics and Biomat USA.

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