Dialight Regulatory News (DIA)

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

DIALIGHT

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

An acquisition or disposal of voting rights

YES

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

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

Financière de L'Echiquier for the account of these funds

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

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

14th December 2017

6. Date on which issuer notified:

18th December 2017

7. Threshold(s) that is/are crossed orreached: vi, vii

3% that is crossed

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB0033057794

928 574

928 574

1 005 866

1 005 866

NA

3.09%

NA

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

NA

NA

NA

NA

NA

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

NA

NA

NA

NA

NA

Nominal

Delta

NA

NA

Total (A+B+C)

Number of voting rights

Percentage of voting rights

1 005 866

3.09%

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

NA

Proxy Voting:

10. Name of the proxy holder:

FINANCIERE DE L'ECHIQUIER

11. Number of voting rights proxy holder will ceaseto hold:

NA

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

NA

13. Additional information:

NA

14. Contact name:

Jean-François SOLNON

15. Contact telephone number:

00 33 1 47 23 83 99

Note: Annex should only be submitted to the FSA not the issuer

Annex: Notification of major interests in share

A: Identity of the persons or legal entity subject to the notification obligation

Full name

(including legal form of legal entities)

DIALIGHT plc

Contact address

(registered office for legal entities)

Leaf CLevel 36Tower 4225 Old Broad StreetLondon, EC2N 1HQ

Phone number & email

 ir@dialight.com

Other useful information

(at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name

FINANCIERE DE L'ECHIQUIER

Contact address

53 Avenue d'Iéna - 75116 PARIS - FRANCE

Phone number & email

00 33 1 47 23 83 99

gestionproduits@lfde.com

Other useful information

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

C: Additional information

For notes on how to complete form TR-1 please see the FSA website.