Exhibit 99.1

 

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

 

GB00BN4HT335

 

Issuer Name

 

INDIVIOR PLC

 

UK or Non-UK Issuer

 

UK

 

2. Reason for Notification

 

An acquisition or disposal of voting rights

 

3. Details of person subject to the notification obligation

Name

 

Deerfield Management Company, L.P. (Series C)

 

City of registered office (if applicable)

 

 

Country of registered office (if applicable)

 

US

 

4. Details of the shareholder

 

Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above

 

Deerfield Partners, L.P.

 

City of registered office (if applicable)

 

 

Country of registered office (if applicable)

 

U.S.

 

5. Date on which the threshold was crossed or reached

 

08-Nov-2024

 

6. Date on which Issuer notified

11-Nov-2024

 

7. Total positions of person(s) subject to the notification obligation

 

	% of voting rights attached to shares (total of 8.A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)	Total of both in % (8.A + 8.B)	Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached	5.165000	0.000000	5.165000	6567399
Position of previous notification (if applicable)

 

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

8A. Voting rights attached to shares

 

Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00BN4HT335	6567399	0	5.165000	0.000000
Sub Total 8.A	6567399		5.165000%

 

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of financial instrument	Expiration date	Exercise/conversion period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights
Sub Total 8.B1

 

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument	Expiration date	Exercise/conversion period	Physical or cash settlement	Number of voting rights	% of voting rights
Sub Total 8.B2

 

9. Information in relation to the person subject to the notification obligation

2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)

 

Ultimate controlling person	Name of controlled undertaking	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
James E. Flynn (Chain 1)	Flynn Management LLC	5.165000	0.000000	5.165000%
James E. Flynn (Chain 1)	Deerfield Management Company, L.P.
James E. Flynn (Chain 1)	Deerfield Partners, L.P	5.165000	0.000000	5.165000%
James E. Flynn (Chain 2)	J.E. Flynn Capital, LLC.
James E. Flynn (Chain 2)	Deerfield Mgmt, L.P.
James E. Flynn (Chain 2)	Deerfield Partners, L.P.	5.165000	0.000000	5.165000%

 

10. In case of proxy voting

Name of the proxy holder

 

 

The number and % of voting rights held

 

 

The date until which the voting rights will be held

 

 

11. Additional Information

 

 

12. Date of Completion

11-Nov-2024

 

13. Place Of Completion

 

New York, NY