Holding(s) in Company

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

PureTech Health plc

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

An acquisition or disposal of voting rights

✓

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

Zohar LLC

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

20 May 2016

6. Date on which issuer notified:

20 May 2016

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

5%, 4%

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

Ordinary Shares

11,890,157

11,890,157

7,134,094

7,134,094

-

 3.01

-

GB00BY2Z0H74

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

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

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

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

Proxy Voting:

10. Name of the proxy holder:

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

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

13. Additional information:

The triggering transaction comprises the transfer from Zohar LLC of: (i) 2,378,032 ordinary shares in the issuer to the Zohar Family Trust I, a US-established trust of which Daphne Zohar is a beneficiary and trustee; and (ii) 2,378,031 ordinary shares in the issuer to the Zohar Family Trust II, a US-established trust of which Daphne Zohar is a beneficiary (in the event of her spouse's death) and trustee, in each case for nil consideration. The Company was informed that these transfers are for estate planning purposes.

There has been no change in the total number of voting rights directly or indirectly held by Daphne Zohar.

14. Contact name:

Stephen M. Muniz

15. Contact telephone number:

+1 617.456.0042