Farallon Capital Partners, L.P. - 31 Dec 2025 SCHEDULE 13G/A Report for Lantheus Holdings, Inc. Common Stock, par value $0.01 per share (the "Shares") (CATX)

Filing Manager
Farallon Capital Partners, L.P.
Reporting Manager
Dapice Joshua J.
Security
Lantheus Holdings, Inc. Common Stock, par value $0.01 per share (the "Shares")
Symbol
CATX
Shares outstanding
66,188,768 shares
Disclosed Ownership
5,427,479 shares
Ownership
8.2%
Form type
SCHEDULE 13G/A
Filing time
05 Feb 2026, 14:59:24 UTC
Date of event
31 Dec 2025
Previous filing
12 Nov 2025
SEC
View on sec.gov

Reporting Managers (31)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Farallon Capital Partners, L.P. 0.6% 420,581 0 420,581 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Farallon Capital Institutional Partners, L.P. 0.7% 495,662 0 495,662 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Farallon Capital Institutional Partners II, L.P. 0.2% 99,754 0 99,754 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Farallon Capital Institutional Partners III, L.P. 0.1% 58,265 0 58,265 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Four Crossings Institutional Partners V, L.P. 0.1% 88,798 0 88,798 /s/ Hannah E. Dunn Hannah E. Dunn, Manager of its General Partner
Farallon Capital Offshore Investors II, L.P. 1.5% 968,900 0 968,900 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Farallon Capital (AM) Investors, L.P. 0.1% 60,808 0 60,808 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member of its General Partner
Farallon Capital F5 Master I, L.P. 0.2% 145,543 0 145,543 /s/ Hannah E. Dunn Hannah E. Dunn, Manager of its General Partner
Farallon Healthcare Partners Master, L.P. 4.7% 3,089,168 0 3,089,168 /s/ Hannah E. Dunn Hannah E. Dunn, Manager of its General Partner
Farallon Partners, L.L.C. 8% 5,281,936 0 5,281,936 /s/ Hannah E. Dunn Hannah E. Dunn, Managing Member
Farallon Institutional (GP) V, L.L.C. 0.1% 88,798 0 88,798 /s/ Hannah E. Dunn Hannah E. Dunn, Manager
Farallon F5 (GP), L.L.C. 0.2% 145,543 0 145,543 /s/ Hannah E. Dunn Hannah E. Dunn, Manager
Farallon Healthcare Partners (GP), L.L.C. 4.7% 3,089,168 0 3,089,168 /s/ Hannah E. Dunn Hannah E. Dunn, Manager
Dapice Joshua J. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Dreyfuss, Philip D. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Dunn Hannah E. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn
Fried, Richard B 0% 0 0 0 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Gehani, Varun N. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Giauque, Nicolas 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Husen, Avner A. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Kim, David T. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Linn, Michael G. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Luo Patrick (Cheng) 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Patel, Rajiv A. 0% 0 0 0 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Roberts, Jr., Thomas G. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Saito Edric C. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Seybold, William 0% 0 0 0 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Short Daniel S. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Spokes, Andrew J. M. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Warren, John R. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact
Wehrly, Mark C. 8.2% 5,427,479 0 5,427,479 /s/ Hannah E. Dunn Hannah E. Dunn, as attorney-in-fact