LNTH

SEC source: 0000950170-24-028041 · ownership.xml · nonDerivative · entry 2

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,253

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.15 to $64.86, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc. ("LNTH"), any security holder of LNTH or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.

SEC source: 0000950170-24-028041 · ownership.xml · nonDerivative · entry 1

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,982

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-028033 · ownership.xml · nonDerivative · entry 1

Provost Jean-Claude · CIK 0001960060 · Chief Medical Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Theranostics Consulting SAS

Disclosed balance after: 38,841

SEC source: 0000950170-24-028037 · ownership.xml · nonDerivative · entry 1

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,749

SEC source: 0000950170-24-026583 · ownership.xml · nonDerivative · entry 2

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,905

F2 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 3 filed upon the reporting person becoming a Section 16 officer. The number of shares reported in the Form 3 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 3.

SEC source: 0000950170-24-026664 · ownership.xml · nonDerivative · entry 2

Montagut Etienne · CIK 0001861389 · Chief Business Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,225

F2 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 3 filed upon the reporting person becoming a Section 16 officer. The number of shares reported in the Form 3 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 3.

SEC source: 0000950170-24-026647 · ownership.xml · nonDerivative · entry 2

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,217

F2 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 3 filed upon the reporting person becoming a Section 16 officer. The number of shares reported in the Form 3 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 3.

SEC source: 0000950170-24-026680 · ownership.xml · nonDerivative · entry 2

Blanchfield Paul · CIK 0001801395 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 142,108

F2 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 4 filed on March 8, 2021. The number of shares reported in the Form 4 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 4.

SEC source: 0000950170-24-026697 · ownership.xml · nonDerivative · entry 2

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,479

F2 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 4 filed on March 8, 2021. The number of shares reported in the Form 4 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 4.

SEC source: 0000950170-24-026682 · ownership.xml · nonDerivative · entry 4

Heino Mary Anne · CIK 0001610676 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 251,643

F2 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2023.

SEC source: 0000950170-24-026682 · ownership.xml · nonDerivative · entry 3

Heino Mary Anne · CIK 0001610676 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 251,743

F2 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2023.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.14 to $66.10, inclusive. The reporting person undertakes to provide to LNTH any security holder of LNTH or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (4) to this Form 4.

SEC source: 0000950170-24-026682 · ownership.xml · nonDerivative · entry 2

Heino Mary Anne · CIK 0001610676 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 310,994

F2 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.14 to $65.13, inclusive. The reporting person undertakes to provide to LNTH any security holder of LNTH or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.

SEC source: 0000950170-24-026682 · ownership.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 345,506

F1 · kind: The transaction reported in this Form 4 reflects additional shares of common stock issued by Lantheus Holdings, Inc. ("LNTH") to the reporting person upon the vesting of relative Total Shareholder Return PSUs that were previously granted and included in the Form 4 filed on March 8, 2021. The number of shares reported in the Form 4 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 200% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 4.

SEC source: 0000950170-24-027326 · ownership.xml · derivative · entry 10

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,068 shares

Expires 2032-05-06

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-027326 · ownership.xml · derivative · entry 9

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,333 shares

Expires 2025-06-25

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F6 · derivative.exercise_date: The stock options under this grant vested in equal annual installments over the three-year period beginning on June 25, 2016.

SEC source: 0000950170-24-027326 · ownership.xml · derivative · entry 8

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,943 shares

Expires 2025-05-16

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F5 · derivative.exercise_date: The stock options under this grant vested in equal monthly installments over the twelve months beginning on June 16, 2015.

SEC source: 0000950170-24-027326 · ownership.xml · derivative · entry 7

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,045 shares

Expires 2024-05-16

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F4 · derivative.exercise_date: The stock options under this grant vested in equal monthly installments over the twelve months beginning on June 16, 2014.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 6

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,937

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.21 to $66.14, inclusive. The reporting person undertakes to provide to LNTH, any security holder of LNTH or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 5

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,301

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.21 to $65.19, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc. ("LNTH"), any security holder of LNTH or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 4

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,326

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 3

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,258

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 2

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,925

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-027326 · ownership.xml · nonDerivative · entry 1

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,982

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 29, 2023.

SEC source: 0000950170-24-026583 · ownership.xml · derivative · entry 3

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,368

Underlying: Common Stock · 3,368 shares

Expires 2034-03-01

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026583 · ownership.xml · nonDerivative · entry 1

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,088

F1 · kind: Consists of 1,895 restricted stock units that vest in equal installments over a three-year period and 3,790 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026664 · ownership.xml · derivative · entry 3

Montagut Etienne · CIK 0001861389 · Chief Business Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,559

Underlying: Common Stock · 18,559 shares

Expires 2034-03-01

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026664 · ownership.xml · nonDerivative · entry 1

Montagut Etienne · CIK 0001861389 · Chief Business Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,580

F1 · kind: Consists of 10,442 restricted stock units that vest in equal installments over a three-year period and 20,884 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026647 · ownership.xml · derivative · entry 3

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,043

Underlying: Common Stock · 18,043 shares

Expires 2034-03-01

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026647 · ownership.xml · nonDerivative · entry 1

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,751

F1 · kind: Consists of 10,152 restricted stock units that vest in equal installments over a three-year period and 20,304 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026680 · ownership.xml · derivative · entry 3

Blanchfield Paul · CIK 0001801395 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,652

Underlying: Common Stock · 21,652 shares

Expires 2034-03-01

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026680 · ownership.xml · nonDerivative · entry 1

Blanchfield Paul · CIK 0001801395 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,198

F1 · kind: Consists of 12,182 restricted stock units that vest in equal installments over a three-year period and 24,365 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026632 · ownership.xml · nonDerivative · entry 1

MARKISON BRIAN A · CIK 0001283061 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,826

F1 · kind: Consists of 65,748 restricted stock units that vest in equal installments over a three-year period and 65,748 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026697 · ownership.xml · derivative · entry 3

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,652

Underlying: Common Stock · 21,652 shares

Expires 2034-03-01

F3 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026697 · ownership.xml · nonDerivative · entry 1

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,717

F1 · kind: Consists of 12,182 restricted stock units that vest in equal installments over a three-year period and 24,365 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-026662 · ownership.xml · derivative · entry 2

Provost Jean-Claude · CIK 0001960060 · Chief Medical Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Theranostics Consulting SAS

Disclosed balance after: 10,998

Underlying: Common Stock · 10,998 shares

Expires 2034-03-01

F2 · derivative.exercise_date: The option vests in three equal annual installments beginning on March 1, 2025.

SEC source: 0000950170-24-026662 · ownership.xml · nonDerivative · entry 1

Provost Jean-Claude · CIK 0001960060 · Chief Medical Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Theranostics Consulting SAS

Disclosed balance after: 39,387

F1 · kind: Consists of 6,188 restricted stock units that vest in equal installments over a three-year period and 12,376 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award, however the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

SEC source: 0000950170-24-015930 · ownership.xml · nonDerivative · entry 1

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,403

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023.

SEC source: 0000950170-24-005418 · ownership.xml · nonDerivative · entry 1

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,744

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023.

SEC source: 0000950170-23-071565 · ownership.xml · nonDerivative · entry 1

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 103,170

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2023.

SEC source: 0000950170-23-070778 · ownership.xml · nonDerivative · entry 1

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,085

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023.

SEC source: 0000950170-23-070777 · ownership.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 264,337

F1 · balance_after: The reporting person transferred 53,350 shares of Lantheus Holdings, Inc. common stock to the Seamus C. Fennell Foundation, a charitable foundation of which the reporting person is a trustee.

SEC source: 0000950170-23-065125 · ownership.xml · nonDerivative · entry 1

Blanchfield Paul · CIK 0001801395 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,651

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2023.

F2 · balance_after: Includes 84 shares acquired under the LNTH employee stock purchase plan on September 13, 2023.

SEC source: 0000950170-23-064205 · ownership.xml · nonDerivative · entry 1

Sabens Andrea · CIK 0001876279 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,426

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 11, 2023.

SEC source: 0000950170-23-064209 · ownership.xml · nonDerivative · entry 2

Heino Mary Anne · CIK 0001610676 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 317,687

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.85 to $64.40, inclusive. The reporting person undertakes to provide to LNTH any security holder of LNTH or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.

SEC source: 0000950170-23-064209 · ownership.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 323,555

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.85 to $63.815, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc. ("LNTH") any security holder of LNTH or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.

SEC source: 0000950170-23-048794 · ownership.xml · derivative · entry 3

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,846 shares

Expires 2023-11-06

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2023.

F2 · derivative.exercise_date: The stock options under this grant vested in equal installments over a four-year period beginning on November 6, 2013.

SEC source: 0000950170-23-048794 · ownership.xml · nonDerivative · entry 2

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,295

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2023.

SEC source: 0000950170-23-048794 · ownership.xml · nonDerivative · entry 1

Niedzwiecki Daniel · CIK 0001861113 · See Remarks

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,141

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2023.

SEC source: 0000950170-23-045852 · ownership.xml · nonDerivative · entry 1

Marshall Robert J. Jr. · CIK 0001754976 · CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 113,170

SEC source: 0000950170-23-044151 · ownership.xml · nonDerivative · entry 1

Blanchfield Paul · CIK 0001801395 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 90,067

F1 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2023.