Who owns Onsior?
Onsior is owned by Elanco (the United States, NYSE: ELAN).[1]
Evidence: Elanco Animal Health Incorporated Annual Report on Form 10-K filed 2026-02-24, SEC EDGAR, 24 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- Elanco Animal Health Incorporated verified
- Owner HQ
- 🇺🇸 United States, Indianapolis
- Origin
- 🇺🇸 United States
- Category
- Pet & animal care › Pet supplies & services › Veterinary services
- Parent ticker
- NYSE: ELAN
- Trademark registrant
- ELANCO US INC. (USPTO)
- Last verified
- · 2 sources
About Onsior
Onsior is a pain medicine for cats and dogs that Elanco says controls postoperative pain and inflammation associated with certain surgeries. It is one of the named pain and therapeutics products in the pet health section of Elanco's 10-K, alongside the osteoarthritis medicine Galliprant. Elanco lists it in the animal-health portfolio described in its annual report on Form 10-K for the year ended 31 December 2025.
What Elanco's annual report says about Onsior
Sentences about Onsior from Elanco's latest annual filing[1], copied word for word.
Cats, Dogs Onsior Controls postoperative pain and inflammation associated with certain surgeries.
How often Elanco names Onsior in its annual report
A plain count of the times the name appears in the text of each annual report, not counting the start of a sentence. A brand that an owner writes about more is usually one it treats as central.
Trademark record for Onsior
The USPTO record for the Onsior mark lists ELANCO US INC. as the owner of record (serial number 87234459). That name matches the owner named above.[2]
Ownership timeline of Onsior
Where Onsior sits in Elanco
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Elanco ownership tree →
See the full Elanco brand portfolio (15) →
Other brands owned by Elanco
Elanco controls 15 brands on Brandtree, 15 of them in pet & animal care.
Also in pet & animal care
Other brands in veterinary services, and who owns them
The 45 brands in veterinary services on Brandtree belong to 7 owners. The largest is Zoetis, with 17; Elanco has 10.
About the owner: Elanco
Elanco is a publicly listed company headquartered in Indianapolis, United States, founded in 1954. Brandtree records 15 brands under its control, and it is listed as NYSE: ELAN.
Elanco Animal Health is an Indianapolis animal health company with pet health and farm animal businesses. Its 10-K says it has a heritage dating to 1954 as a business unit of Eli Lilly and Company, was incorporated independently in September 2018 and separated in March 2019, and in August 2020 acquired Bayer Animal Health, which it calls the largest acquisition in industry history. It sells flea and tick, dermatology and pain products for pets and feed additives, vaccines and antibiotics for livestock.
🇺🇸 Onsior and other American brands
Brandtree records a controlling owner for 2,399 brands that began in the United States. 461 of them (19%) are now controlled by a company headquartered in another country; Onsior is not one of them.
- 4health — Tractor Supply 🇺🇸
- American Journey — Chewy 🇺🇸
- Apoquel — Zoetis 🇺🇸
- Aqueon — Central Garden & Pet 🇺🇸
- Aureomycin — Phibro 🇺🇸
- BARK — BARK 🇺🇸
Frequently asked questions
Who is the parent company of Onsior?
The parent company of Onsior is Elanco, a publicly listed company headquartered in the United States.
Is Onsior American?
Yes. Onsior originated in the United States and its owner, Elanco, is also headquartered in the United States.
Is Onsior still owned by Elanco?
Yes. As of 9 October 2026, Onsior is still owned by Elanco. The ownership record was last checked against primary sources on that date.
Sources (2) & corrections
Last verified . Every ownership fact above is backed by one of these primary documents. Numbers in brackets in the text refer to this list.
- [1] Elanco Animal Health Incorporated Annual Report on Form 10-K filed 2026-02-24 — SEC EDGAR, SEC Form 10-K, published 24 February 2026; retrieved 2 October 2026.
- [2] USPTO: ONSIOR, serial 87234459 — United States Patent and Trademark Office, Trademark registry; retrieved 2 October 2026.
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