Holding(s) in Company

Stem Cell Sciences plc
29 April 2008



For Immediate Release                                         29th April 2008

                             Stem Cell Sciences plc

                             Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

2. Reason for the notification (place an X inside the appropriate bracket/s)

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 the notification obligation: AIM
Realisation Fund Limited

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

5. Date of the transaction (and date on which the threshold is crossed or
reached if different): 25/04/08

6. Date on which issuer notified: 28/04/08

7. Threshold(s) that is/are crossed or reached: 3%

8. Notified details:
.................

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE: GB00B0BZYL27

Situation previous to the Triggering transaction

Number of shares: 1,324,239

Number of voting Rights: 1,324,239

Resulting situation after the triggering transaction

Class/type of shares if possible using the ISIN CODE: GB00B0BZYL27

Number of shares: 824,239

Number of voting rights: 824,239

Resulting situation after triggering transaction

Number of shares

Direct: 824,239

Indirect:

% of voting rights: 2.46%

B: Financial Instruments
Resulting situation after the triggering transaction

Type of financial instrument
Expiration Date
Exercise/Conversion Period/ Date
Number of voting rights that may be acquired if the instrument is exercised/
converted.

% of voting rights

Total (A+B)
Number of voting rights: 824,239

% of voting rights: 2.46%

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

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:
Shareholding based on total voting rights of 33,516,149
.................

14. Contact name:
Giorgio Reggiani, Finance Director, Stem Cell Sciences Plc

15. Contact telephone number:
[phone]

                                    - Ends -




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