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Collaboration and Licensing Agreements (Tables)
 6 Months Ended
Jun. 30, 2024
Collaboration and Licensing Agreements  
Schedule of Revenue by Licensees
The revenues recorded for the three and six months ended June 30, 2024 and 2023 were earned principally from the following licensees (in millions):
Three Months Ended
June 30,		Six Months Ended
June 30,
2024202320242023
Alexion$6.9 $11.2 $16.3 $21.6 
Janssen— 22.2 — 27.5 
Mabgeek
$1.5 $— $1.5 $— 
MorphoSys1.6 2.0 4.4 3.9 
Vega— — 0.5 — 
Vir— 0.1 0.1 1.5 
Viridian$— $— $— $— 
Zenas$— $10.0 $— $10.0 
Third Party Licensee
$7.0 $— $7.0 $— 
Total$17.0 $45.5 $29.8 $64.5 
Schedule of Disaggregation of Revenue
The table below summarizes the disaggregation of revenue recorded for the three and six months ended June 30, 2024 and 2023 (in millions):
Three Months Ended
June 30,		Six Months Ended
June 30,
2024202320242023
Research collaboration$— $22.2 $— $22.5 
License
8.5 — 8.5 — 
Milestone— 10.0 0.5 15.0 
Royalties— 13.3 0.1 27.0 
Non-cash royalties8.5 — 20.7 — 
Total$17.0 $45.5 $29.8 $64.5