Partnerships
GlaxoSmithKline Immuno-Oncology Financial Collaboration
Our immuno-oncology financial collaboration with GlaxoSmithKline (GSK) is focused upon the development and commercialization of Anaptys-discovered checkpoint antagonist antibodies including Jemperli™ (dostarlimab), a PD-1 antagonist, currently approved for endometrial cancer and dMMR pan tumors, and currently being studied in rectal cancer, colon cancer and head and neck squamous cell carcinoma
Potential royalties and milestones to Anaptys from GSK immuno-oncology financial collaboration
Royalty rate
(annual WW net sales)

8% – $0 to $1 billion
12% – $1.0 to $1.5 billion
20% – $1.5 to $2.5 billion
25% – >$2.5 billion
Remaining retained milestones

- $75MM when annual net sales ≥ $1 billion1

- “Jemperli – only” capped non-recourse monetization
- Jemperli receivables payable to Sagard until cumulative $600MM paydown by Mar. 31, 20311,2
~$122MM paid to Sagard as of June 2025
Projected cumulative $600MM paydown Q3 2028 based on Wall Street Consensus3
1. The $75MM commercial milestone is excluded from Sagard monetization. The following Jemperli milestones are also still potentially payable from GSK but contribute to Sagard paydown: $15MM on regulatory approvals and $50MM on annual net sales of $750MM.
2. If cumulative $600MM not paid to Sagard by Mar. 31, 2031, the cumulative paydown increases to $675MM.
3. GSK analyst consensus as of 6/6/2025 converted to USD (1.36x conversion rate), GSK website – https://www.gsk.com/en-gb/investors/analyst-consensus/
Note: Anaptys’ capped non-recourse monetizations resulted in $300MM of non-dilutive capital, including $250MM in Oct. 2021 and $50MM in May 2024.
Note: Separate sale of Anaptys’ Zejula (niraparib) royalty interest occurred in September 2022 to DRI Healthcare Trust for $35MM upfront + $10MM potential milestone upon FDA approval of Zejula for the treatment of endometrial cancer, to the extent that such approval occurs on or before 12/31/25. At present, the Jemperli plus Zejula combination demonstrated significantly improved PFS in primary advanced or recurrent endometrial cancer in the RUBY Phase III trial.
Vanda Imsidolimab (IL-36R) Financial Collaboration

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Exclusive global license to Vanda
announced February 2025
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$15 million upfront payment
$10 million upfront and $5 million for existing drug supply
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$35 million future milestones
$5 million – FDA approval in GPP
$5 million – EMA approval in GPP
$25 million – Achievement of $100 million WW annual net sales
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10% royalties on global net sales
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FDA BLA submission for generalized pustular psoriasis (GPP) expected in 2025
Imsidolimab completed two positive global Phase 3 studies in GPP
Vanda plans to expand development into additional indications
Access scientific publications on our immuno-oncology and imsidolimab partnerships.