LNTH

SEC source: 0000899243-18-006656 · doc4.xml · nonDerivative · entry 1

MARKISON BRIAN A · CIK 0001283061 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,114

SEC source: 0000899243-18-006655 · doc4.xml · nonDerivative · entry 1

LENO SAM R · CIK 0001238660 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,177

SEC source: 0000899243-18-006649 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 175,651

SEC source: 0000899243-18-006642 · doc4.xml · nonDerivative · entry 1

Pucel Kenneth · CIK 0001312691 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,911

SEC source: 0000899243-18-006647 · doc4.xml · nonDerivative · entry 1

Healey Timothy G · CIK 0001382032 · SVP, Commercial

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,658

SEC source: 0000899243-18-006645 · doc4.xml · nonDerivative · entry 1

Robertson A Frederick · CIK 0001396084 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,641

SEC source: 0000899243-18-006652 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,390

SEC source: 0000899243-18-006643 · doc4.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 679,494

SEC source: 0000899243-18-006641 · doc4.xml · nonDerivative · entry 1

Orlandi Cesare · CIK 0001610664 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,625

SEC source: 0000899243-18-005646 · doc4.xml · nonDerivative · entry 2

Healey Timothy G · CIK 0001382032 · SVP, Commercial

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,886

F2 · kind: These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2017.

F3 · price: The price reported in this Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.35 to $19.971, 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, 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: 0000899243-18-005642 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 150,684

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-18-005646 · doc4.xml · nonDerivative · entry 1

Healey Timothy G · CIK 0001382032 · SVP, Commercial

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,582

F1 · kind: This transaction represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-18-005645 · doc4.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 559,241

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the initial vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-18-005640 · doc4.xml · nonDerivative · entry 1

Orlandi Cesare · CIK 0001610664 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,996

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-18-005641 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,197

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-18-001332 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 138,656

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 September 11, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.45 to $23.575, 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, 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: 0000899243-18-000986 · doc4.xml · derivative · entry 5

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17,172 shares

Expires 2018-04-04

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 September 12, 2017.

F4 · derivative.exercise_date: This option, originally representing a right to purchase a total of 44,485 shares of common stock, became exercisable based on LNTH's satisfaction of certain performance criteria for each of the fiscal years ending 2008, 2009, 2010, 2011 and 2012. Certain of the performance criteria for 2008 and 2009 were met, resulting in the vesting of this option as to an aggregate of 17,172 shares of common stock.

SEC source: 0000899243-18-000986 · doc4.xml · derivative · entry 4

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,483 shares

Expires 2018-04-04

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 September 12, 2017.

F3 · derivative.exercise_date: This option, originally representing a right to purchase a total of 44,483 shares of common stock, became exercisable in five equal annual installments beginning on April 4, 2009.

SEC source: 0000899243-18-000986 · doc4.xml · nonDerivative · entry 3

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 152,301

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.30 to $22.675, 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, 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: 0000899243-18-000986 · doc4.xml · nonDerivative · entry 2

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 173,956

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 September 12, 2017.

SEC source: 0000899243-18-000986 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 156,784

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 September 12, 2017.

SEC source: 0000899243-18-000265 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 142,522

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-026786 · doc4.xml · nonDerivative · entry 2

Healey Timothy G · CIK 0001382032 · SVP, Commercial

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,362

F2 · kind: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2016.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.25 to $21.825, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc. or the staff of the Securities and Exchange Commission, 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: 0000899243-17-026786 · doc4.xml · nonDerivative · entry 1

Healey Timothy G · CIK 0001382032 · SVP, Commercial

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,676

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-026586 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 152,301

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 September 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.60 to $21.80, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc. or the staff of the Securities and Exchange Commission, 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: 0000899243-17-024367 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,906

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 September 11, 2017.

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 11, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.30 to $18.55, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc. or the staff of the Securities and Exchange Commission, 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: 0000899243-17-022083 · doc4.xml · nonDerivative · entry 2

SCHAFFER DERACE L · CIK 0001031735 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,730

SEC source: 0000899243-17-022083 · doc4.xml · nonDerivative · entry 1

SCHAFFER DERACE L · CIK 0001031735 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,730

SEC source: 0000899243-17-022000 · doc4.xml · derivative · entry 3

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,484

Underlying: Common Stock · 20,000 shares

Expires 2018-01-18

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 May 12, 2017.

F3 · derivative.exercise_date: This option, originally representing a right to purchase a total of 44,484 shares of common stock, became exercisable in five equal annual installments beginning on January 16, 2009.

SEC source: 0000899243-17-022000 · doc4.xml · nonDerivative · entry 2

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,218

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 May 12, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.3969 to $16.50, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc. or the staff of the Securities and Exchange Commission, 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: 0000899243-17-022000 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 184,218

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 May 12, 2017.

SEC source: 0000899243-17-021846 · doc4.xml · nonDerivative · entry 2

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 38,269

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.50 to $16.725, inclusive. The Reporting Person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021846 · doc4.xml · nonDerivative · entry 1

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 247,253

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.50 to $16.725, inclusive. The Reporting Person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 6

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 52,684

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.50 to $17.25, inclusive.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 5

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 335,796

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.50 to $17.25, inclusive.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 4

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 55,983

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.175, inclusive.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 3

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 353,320

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.175, inclusive.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021612 · doc4.xml · nonDerivative · entry 1

Orlandi Cesare · CIK 0001610664 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,078

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 August 4, 2017.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.50 to $16.85, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc. or the staff of the Securities and Exchange Commission, 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: 0000899243-17-021383 · doc4.xml · nonDerivative · entry 1

DUFFY MICHAEL P · CIK 0001237200 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,218

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-021384 · doc4.xml · nonDerivative · entry 1

Orlandi Cesare · CIK 0001610664 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 105,078

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-021382 · doc4.xml · nonDerivative · entry 1

Dawes William C. Jr. · CIK 0001610673 · VP, Mfg & Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,581

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-021381 · doc4.xml · nonDerivative · entry 1

Crowley John W. · CIK 0001610665 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 151,661

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 2

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 64,425

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.35, inclusive. The Reporting Person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (4) and (5) to this Form 4.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021564 · doc4.xml · nonDerivative · entry 1

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 396,888

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.35, inclusive. The Reporting Person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (4) and (5) to this Form 4.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021317 · doc4.xml · nonDerivative · entry 6

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 65,263

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.525, inclusive.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021317 · doc4.xml · nonDerivative · entry 5

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 402,050

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.525, inclusive.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021350 · doc4.xml · nonDerivative · entry 1

Heino Mary Anne · CIK 0001610676 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 565,767

F1 · kind: The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4.

SEC source: 0000899243-17-021317 · doc4.xml · nonDerivative · entry 4

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 86,491

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.175, inclusive.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021317 · doc4.xml · nonDerivative · entry 3

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 532,823

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.175, inclusive.

F2 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

SEC source: 0000899243-17-021317 · doc4.xml · nonDerivative · entry 2

Burgstahler David F · CIK 0001374179 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 94,595

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.00 to $17.15, inclusive. The Reporting Person undertakes to provide to Lantheus Holdings, Inc., any security holder of Lantheus Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (4) and (5) to this Form 4.

F3 · ownership.nature: Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Burgstahler is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Burgstahler may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Burgstahler expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.