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- Ray Therapeutics
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
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
Website
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
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Apr 2026 | Series B | Janus Henderson (lead); Putnam Premier IT; Novo Holdings; Invus; Marshall Wace; Norwest; MRL Ventures Fund; Adage Capital Management; Platanus; Deerfield; 4BIO Capital | $125M | Ray 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 2023 | Series A | Novo Holdings (lead); Norwest; MRL Ventures Fund; Wu Capital; Deerfield; 4BIO Capital | $100M | Ray 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 2022 | Seed | 4BIO Capital (lead) | $6M | Ray 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
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 3 | Lead | Jan 2022 | ||
| 2 | Lead | May 2023 | ||
| 2 | Participant | May 2023 | ||
| 2 | Participant | May 2023 | ||
| 2 | Participant | May 2023 | ||
| 1 | Participant | Apr 2026 | ||
| 1 | Participant | Apr 2026 | ||
| 1 | Participant | Apr 2026 | ||
| 1 | Lead | Apr 2026 | ||
| 1 | Participant | Apr 2026 | ||
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Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
Sign up to see data on 350K+ funding rounds and disclosed revenue and EBITDA valuation multiples, from seed, through growth stage, to pre-IPO.
Start Free TrialRay 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.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $94B | $40B | $651B | 6.8x | ||
| Publicly listed | $77B | $26B | $351B | 4.9x | ||
| Publicly listed | $24B | $5.3B | $66B | 3.1x | ||
| Publicly listed | $4.3B | $1.4B | $37B | 8.4x | ||
| Private | - | - | $12B | - | ||
| Private | - | - | $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 FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $243B | $67B | 4.4x | 2.4x | 15.8x | 4.4x | |||
| $65B | $28B | 16.5x | 13.1x | 38.7x | 27.0x | |||
| $94B | $40B | 7.2x | 6.8x | 17.0x | 18.3x | |||
| $61B | $17B | 8.7x | 8.1x | 30.6x | 17.6x | |||
| $65B | $28B | 6.3x | 6.2x | 14.7x | 21.0x | |||
| $77B | $26B | 5.0x | 4.9x | 14.6x | 12.4x | |||
| $57B | $22B | 5.5x | 5.5x | 14.2x | 13.3x | |||
| $59B | $19B | 4.8x | 4.5x | 14.6x | 12.7x | |||
This data is available for Pro users. Sign up to see all Ray Therapeutics competitors and their valuation data. Start Free Trial | ||||||||
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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