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FORM 8.1(a) & (b) (Opening Position Disclosure)

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Alkermes (Nasdaq: ALKS) filed an Opening Position Disclosure (Form 8.1(a)&(b)) under Irish Takeover Panel rules on 5 November 2025 with a position date of 3 November 2025. The form names Avadel Pharmaceuticals plc as the related offeror/offeree and states Alkermes as the offeror. The disclosure reports no indemnities, option arrangements, or derivative agreements and no supplemental Form 8 attached. It lists J.P. Morgan staff holdings totalling 13,553 ordinary shares (0.0139%) in Avadel, split between two entities (53 and 13,500 shares).

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News Market Reaction 10 Alerts

+2.24% News Effect
+9.9% Peak in 53 min
+$130M Valuation Impact
$5.94B Market Cap
0.4x Rel. Volume

On the day this news was published, ALKS gained 2.24%, reflecting a moderate positive market reaction. Argus tracked a peak move of +9.9% during that session. Our momentum scanner triggered 10 alerts that day, indicating notable trading interest and price volatility. This price movement added approximately $130M to the company's valuation, bringing the market cap to $5.94B at that time.

Data tracked by StockTitan Argus on the day of publication.

DUBLIN, Nov. 5, 2025 /PRNewswire/ -- Alkermes plc (Nasdaq: ALKS):

IRISH TAKEOVER PANEL

OPENING POSITION DISCLOSURE UNDER RULE 8.1(a) AND (b) OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER RULES, 2022 BY AN OFFEROR OR AN OFFEREE

1.     KEY INFORMATION

(a) 

Full name of discloser:

Alkermes plc

(b)

Owner or controller of interests and short
positions disclosed, if different from 1(a):

 

The naming of nominee or vehicle
companies is
insufficient. For a trust, the
trustee(s), settlor and
beneficiaries must
be named.

N/A

(c)

Name of offeror/offeree in relation to whose
relevant securities this form relates:

 

Use a separate form for each offeror/offeree

Avadel
Pharmaceuticals 
plc

(d)

Is the discloser the offeror or the offeree?

OFFEROR

(e) 

Date position held:

 

The latest practicable date prior to the
disclosure

3 November
2025

(f)  

 

In addition to the company in 1(c) above, is
the
discloser also making disclosures in
respect
of any other party to the offer?

 

If it is a cash offer or possible cash offer, state
"N/A"

N/A

2.     INTERESTS AND SHORT POSITIONS

If there are interests and positions to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2 for each additional class of relevant security.

Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates (Note 1)

N/A

All interests and all short positions should be disclosed.

Details of options including rights to subscribe for new securities and any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8.

3.     INTERESTS AND SHORT POSITIONS OF PERSONS ACTING
        IN CONCERT WITH THE PARTY MAKING THE DISCLOSURE

Details of any interests and short positions (including directors'
and other employee options) of any person acting in concert with
the party making the disclosure:

Interests of J.P. Morgan (together with its members of staff under Rule 
3.3(b)(v) of Part A of the Irish Takeover Rules), financial advisors to
Alkermes plc, but, for clarity, not held on behalf of Alkermes plc:


Party

Class of 
Relevant
Security

Number of 
ordinary
shares held
at midnight
(ET) on
3 November
2025

Percentage 
of total
issued share
capital
(rounded)


55I, LLC

Ordinary 
shares of
US$0.01
each

53

0.0001 %


JPMorgan
Chase Bank,
National
Association

Ordinary 
shares of
US$0.01
each

13,500

0.0139 %


TOTAL


13,553

0.0139 %






Details of any open stock-settled derivative positions (including traded 
options), or agreements to purchase or sell relevant securities, should
be given on a Supplemental Form 8.

Ap11

4.     OTHER INFORMATION

(a)    Indemnity and other dealing arrangements

Details of any indemnity or option arrangement, or any agreement
or understanding, formal or informal, relating to relevant securities
which may be an inducement to deal or refrain from dealing entered 
into by the party to the offer making the disclosure or any
person
acting in concert with it:

Irrevocable commitments and letters of intent should not be included. If
there are no such agreements, arrangements or understandings, state
"none"

 

None

 

(b)      Agreements, arrangements or understandings 
          relating to options or derivatives

Full details of any agreement, arrangement or understanding
between the person disclosing and any other person relating to the
voting rights of any relevant securities under any option
referred
to on this form or relating to the voting rights or future
acquisition
or disposal of any relevant securities to which any
derivative
referred to on this form is referenced. If none, this
should be stated. 

 

None

 

(c)     Attachments

Is a Supplemental Form 8 attached?   

YES/NO


 

 

 

No



Date of disclosure:

5 November 2025

Contact name:

Sandy Coombs, Alkermes

Telephone number:

+1 781 609 6377



Public disclosures under Rule 8.1 of the Rules must be made to a 
Regulatory Information Service.

Ap12

NOTES ON FORM 8.1(a) and (b)

  1.      See the definition of "interest in a relevant security" in Rule 2.5 of Part A of the Rules and see Rule 8.6(a) of Part B of the Rules.

  2.      See the definition of "relevant securities" in Rule 2.1 of Part A of the Rules.

  3.      If details included in a disclosure under Rule 8 are incorrect, they should be corrected as soon as practicable in a subsequent disclosure. Such disclosure should state clearly that it corrects details disclosed previously, identify the disclosure or disclosures being corrected, and provide sufficient detail for the reader to understand the nature of the corrections. In the case of any doubt, the Panel should be consulted.

    For full details of disclosure requirements, see Rule 8 of the Rules. If in doubt, consult the Panel.

    References in these notes to "the Rules" are to the Irish Takeover Panel Act, 1997, Takeover Rules, 2022.

 

 

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SOURCE Alkermes plc

FAQ

What did Alkermes (ALKS) disclose in the Form 8.1(a)&(b) on November 5, 2025?

Alkermes disclosed an opening position under Irish Takeover Panel rules dated 3 Nov 2025, named Avadel Pharmaceuticals as the related party, and reported no indemnities or derivative arrangements.

How large were the J.P. Morgan staff holdings reported in Alkermes' November 5, 2025 disclosure?

The filing shows 13,553 ordinary shares held by J.P. Morgan staff, representing 0.0139% of issued share capital.

Does the Alkermes Form 8.1(a)&(b) include any option or derivative agreements affecting Avadel shares?

No. The disclosure states none for agreements, arrangements or understandings relating to options or derivatives.

Is there a Supplemental Form 8 attached to Alkermes' opening position disclosure for Avadel?

No. The filing indicates No supplemental Form 8 was attached.

Who is the contact listed on the Alkermes opening position disclosure filed November 5, 2025?

The contact is listed as Sandy Coombs, Alkermes with telephone +1 781 609 6377.
Alkermes Plc

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