Loyal
11 known investors
Loyal develops therapeutics to help dogs live longer and healthier lives, focusing on canine aging research and longevity interventions for companion dogs.
Also known as Cellular Longevity, Inc. · Loyal for Dogs
Founders & leadership

Investors · 11
Funding
SEC filings, press & company announcements$100M disclosed across 1 of 2 rounds · 2026
- $100MSeries CFeb 2026 · 3 sources
age1 (lead), Baillie Gifford
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Company profile
researched Aug 2026Loyal is a veterinary therapeutics developer working on drugs aimed at the biology of aging in dogs rather than at individual age-associated diseases. The company frames aging as the most significant modifiable risk factor for many degenerative and chronic conditions in adult dogs, and targets the underlying processes that lead to age-associated disease and disability in order to extend healthy lifespan.
The company has three drug programs in development. Its lead candidate, LOY-002, is a once-daily pill for senior dogs aged 10 years and older weighing at least 14 pounds; it is intended to preserve quality of life and extend lifespan by improving metabolic health and insulin sensitivity and lowering insulin levels. LOY-002 is being evaluated in the STAY clinical trial, which spans 70 veterinary practices and has enrolled 1,317 dogs. Loyal is pursuing FDA conditional approval for LOY-002 and has had two of three major requirements accepted: preliminary efficacy data (RXE) and safety studies (TAS), with manufacturing (CMC) still in progress.
Alongside its drug programs, Loyal operates the Loyal Learning Hub, a free library of RACE-approved continuing education courses on canine aging for veterinary teams, and publishes senior dog care resources and clinical trial information for dog owners and veterinarians.
Traction
Three drug programs are in development. The STAY clinical trial for LOY-002 involves 70 veterinary practices and 1,317 enrolled dogs. LOY-002 has completed two of the three major requirements for FDA conditional approval, with the preliminary efficacy data package and safety studies accepted and manufacturing review in progress.
Latest developments
LOY-002 recently cleared the second of three major requirements for FDA conditional approval when its safety studies were accepted, leaving manufacturing (CMC) as the remaining component. The company states this is the clearest signal yet that a longevity drug for dogs could become available.
▸Full profile — market position, technology, go-to-market, risks & controversies
Market position
Loyal positions itself as developing the first longevity drugs for dogs, an area distinct from conventional veterinary treatments for specific age-related diseases, and its work has drawn coverage in general and business press on dog longevity and its potential relevance to human aging research.
Technology
Loyal's programs are small-molecule or pharmaceutical interventions targeting mechanisms of canine aging rather than single disease indications. LOY-002, the lead asset, is a once-daily oral pill designed to improve metabolic health and insulin sensitivity and to lower insulin levels in senior dogs, on the premise that these metabolic pathways represent a root cause of aging.
Go-to-market
Loyal engages dog owners directly through waitlist sign-ups for future drug availability and through senior dog care content, and reaches veterinarians via clinical trial participation and free RACE-approved continuing education courses in the Loyal Learning Hub. Commercial availability of its lead drug is contingent on FDA conditional approval.
Owners of aging and senior dogs (LOY-002 targets dogs aged 10 years and older weighing 14 pounds or more) and the veterinarians and veterinary practices that treat them.
Risks & controversies
Loyal states that FDA approval of LOY-002 is not guaranteed; the manufacturing (CMC) requirement for conditional approval remains outstanding, so commercialization timing is uncertain.
Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 1
launches, deals, and filingsLoyal announced that its lead senior-dog longevity candidate LOY-002 had its safety studies (TAS) accepted, following earlier acceptance of preliminary efficacy data (RXE). Manufacturing (CMC) remains in progress; two of three major requirements for FDA conditional approval are complete and approval is not guaranteed.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
▸Research sources · 1
primary sources listed
- Loyalloyalfordogs.com · web
1 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Loyal do?
- Loyal is a veterinary biotech developing longevity drugs intended to extend healthy lifespan in dogs.
- Who founded Loyal?
- Loyal was founded by Celine Halioua.
- Who are Loyal's investors?
- Loyal's investors include age1, Collaborative Fund, First Round Capital, Flucas Ventures, Khosla Ventures, Metaplanet, Shrug Capital, Todd and Rahul’s Angel Fund and 3 more.
- How much funding has Loyal raised?
- Loyal has disclosed $100M raised across 1 of its 2 known rounds.






