Holding(s) in Company

TR-1: Standard Form TR-1

Voting Rights attached to Shares - Article 12(1) of Directive 2004/109/EC Financial Instruments - Article 11(3) of the Commission Directive 2007/14/EC

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Elan Corporation Plc

2. Reason for notification (please tick the appropriate box or boxes)

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached 

An event changing the breakdown of voting rights

Other (please specify):______________

3. Full name of person(s) subject to notification obligation:

Wellington Management Company, LLP

4. Full name of shareholder(s) (if different from 3):

Bank of New York

BNP Paribas

BNY Mellon

Citibank

JP Morgan Chase

Master Trust Bank of Japan Ltd

Northern Trust

State Street

5. Date of transaction (and date on which the threshold is crossed or reached if different):

01 August 2008

6. Date on which issuer notified:

04 August 2008

7. Threshold(s) that is/are crossed or reached:

5%

8: Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN code

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Number of shares

Number of voting rights

Percentage of voting rights

Direct

Indirect

Direct

Indirect

Ordinary

32,105,492 (824,952 ordinary shares and 31,280,540 ADR shares or 32,105,492 ordinary shares on a converted basis)

32,105,492 (824,952 ordinary shares and 31,280,540 ADR shares or 32,105,492 ordinary shares on a converted basis)

21,783,321 (1,277,934 ordinary shares and 20,505,387 ADR shares or 21,783,321 ordinary shares on a converted basis)

4.59%

SUBTOTAL

A (based on aggregate voting rights)

21,783,321 (1,277,934 ordinary shares and 20,505,387 ADR shares or 21,783,321 ordinary shares on a converted basis)

4.59%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

No. of voting rights that may be acquired (if the instrument exercised/converted)

Percentage of voting rights

Total B (in relation to all expiration dates)

Total A+B

Number of voting rights

Percentage of voting rights

21,783,321 (1,277,934 ordinary shares and 20,505,387 ADR shares or 21,783,321 ordinary shares on a converted basis)

4.59%

9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable:

Bank of New York: 20,505,387 shares

BNP Paribas: 111,592 shares

BNY Mellon: 295,812 shares

Citibank: 4,120 shares

JP Morgan Chase: 77,066 shares

Master Trust Bank of Japan Ltd: 387,843 shares

Northern Trust: 198,521 shares

State Street: 201,250 shares

10. In case of Proxy Voting: (name of the proxy holder) will cease to hold (number) voting rights as of (date)

11. Additional Information: Done at (place) on (date)

ANNEX TO THE STANDARD FORM TR-1

Identity of the person or legal entity subject to the notification obligation:

Full name (including legal form for legal entities)

Contact address (registered office for legal entities)

Phone Number

Other useful information (at least legal representative for legal persons)

Wellington Management Company, LLP

75 State Street, Boston, Massachusetts,

02109 U.S.A.

(617) 790-7084

Identity of the notifier, if applicable

Full name

Contact address

Phone Number

Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

Robert J. Toner

75 State Street, Boston, Massachusetts,

02109 U.S.A.

(617) 790-7084

Vice President and Counsel

Additional Information