Westfield Capital Management
LNTH icon

Westfield Capital Management’s Lantheus LNTH Stock Holding History

Westfield Capital Management’s Portfolio LNTH Stock Details LNTH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-1,495,072
Closed -$122M – 260
2025
Q2 		$122M Sell
1,495,072
-94,073
-6% -$8.26M 0.51% 48
2025
Q1 		$155M Buy
1,589,145
+34,052
+2% +$3.18M 0.75% 31
2024
Q4 		$139M Buy
1,555,093
+36,628
+2% +$3.57M 0.61% 44
2024
Q3 		$167M Sell
1,518,465
-122,693
-7% -$12.7M 0.75% 28
2024
Q2 		$132M Sell
1,641,158
-316,860
-16% -$23.2M 0.65% 35
2024
Q1 		$122M Buy
1,958,018
+394,837
+25% +$23.2M 0.64% 35
2023
Q4 		$96.9M Buy
1,563,181
+268,790
+21% +$18.2M 0.56% 51
2023
Q3 		$89.9M Buy
1,294,391
+143,794
+12% +$10.5M 0.61% 46
2023
Q2 		$96.6M Buy
1,150,597
+49,299
+4% +$4.42M 0.61% 47
2023
Q1 		$90.9M Sell
1,101,298
-464,413
-30% -$30M 0.64% 49
2022
Q4 		$79.8M Buy
1,565,711
+310,977
+25% +$19.2M 0.62% 57
2022
Q3 		$88.2M Buy
1,254,734
+315,446
+34% +$23.9M 0.7% 38
2022
Q2 		$62M Buy
+939,288
New +$59.2M 0.49% 72

Other funds holding LNTH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $21.7B AUM 79.24% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RP
Reinhart Partners Mequon, Wisconsin $4.38B AUM 55.55% 1-Year Est. Return

Westfield Capital Management's LNTH Position: Q3 2025 in Review

Westfield Capital Management sold out of Lantheus (LNTH) in Q3 2025, closing a stake of 1,495,072 shares — an estimated $122M sold.

Westfield Capital Management first reported a position in LNTH in Q2 2022 and held it in 13 quarters. The position peaked at $167M in Q3 2024. 418 funds tracked by Wall St. Rank hold LNTH as of Q3 2025.

  • Westfield Capital Management reported no remaining Lantheus position as of Q3 2025 after selling out during the quarter.
  • Westfield Capital Management sold 1,495,072 Lantheus shares in Q3 2025, an estimated $122M.
  • Westfield Capital Management first reported a position in Lantheus in Q2 2022 and held it in 13 quarters.
  • Westfield Capital Management's Lantheus position peaked at $167M in Q3 2024.
  • 418 funds tracked by Wall St. Rank held Lantheus as of Q3 2025.

Based on Westfield Capital Management's 13F filing for Q3 2025, filed 12 Nov 2025.