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Product Sales
 9 Months Ended
Sep. 30, 2025
Revenue from Contract with Customer [Abstract]  
Product Sales Product Sales
Net product sales consist of the following:
Three Months Ended
September 30,
Nine Months Ended
September 30,
(In millions)2025202420252024
EYLEA HD®
U.S.$430.6 $392.3 $1,130.6 $896.5 
EYLEA®
U.S.680.6 1,144.6 2,170.9 3,576.7 
Total EYLEA HD and EYLEAU.S.1,111.2 1,536.9 3,301.5 4,473.2 
Libtayo®
U.S.219.1 194.5 659.4 536.1 
Libtayo
Rest of world
146.1 94.1 367.4 313.8 
Total Libtayo
Global
365.2 288.6 1,026.8 849.9 
Praluent®
U.S.67.7 52.9 190.3 179.0 
Evkeeza®
U.S.42.8 32.4 114.9 87.6 
Inmazeb®
U.S.
— 35.6 — 36.6 
Other products
Global
0.8 — 0.8 — 
$1,587.7 $1,946.4 $4,634.3 $5,626.3 
As of September 30, 2025 and December 31, 2024, the Company had $3.471 billion and $4.278 billion, respectively, of trade accounts receivable that were recorded within Accounts receivable, net.
The Company had product sales to certain customers that each accounted for more than 10% of total gross product revenue for the three and nine months ended September 30, 2025 and 2024. Sales to each of these customers as a percentage of the Company's total gross product revenue are as follows:
Three Months Ended
September 30,
Nine Months Ended
September 30,
2025202420252024
Customer A
49 %51 %51 %51 %
Customer B
30 %24 %26 %24 %