Holding(s) in Company

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

3i Infrastructure plc

1b. Please indicate if the issuer is a non-UK issuer (please mark with an "X" if appropriate)

Non-UK issuer

X

2. Reason for the notification (please mark the appropriate box or boxes with an "X")

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify): Type 1 Disclosure as per the Transparency Directive II Regulation

X

3. Details of person subject to the notification obligation

Name

Schroders plc

City and country of registered office (if applicable)

UK, London

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

Name

City and country of registered office (if applicable)

5. Date on which the threshold was crossed or reached:

01.08.2017

6. Date on which issuer notified (DD/MM/YYYY):

02.08.2017

7. Total positions of person(s) subject to the notification obligation

% of voting rights attached to shares (total of 8. A)

% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)

Total of both in % (8.A + 8.B)

Total number of voting rights of issuer

Resulting situation on the date on which threshold was crossed or reached

7.101%

N/A

7.101%

1,026,549,746

Position of previous notification (if applicable)

7.097%

N/A

7.097%

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

A: Voting rights attached to shares

Class/type of shares

ISIN code (if possible)

Number of voting rights

% of voting rights

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

JE00BYR8GK67

72,894,785

7.101%

SUBTOTAL 8. A

72,894,785

7.101%

B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC (DTR5.3.1.1 (a))

Type of financial instrument

Expiration date

Exercise/Conversion period

Number of voting rights that may be acquired if the instrument is exercised/converted

% of voting rights

SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to Art. 13(1)(b) of Directive 2004/109/EC (DTR5.3.1.1 (b))

Type of financial instrument

Expiration date

Exercise/Conversion period

Physical or cash settlement

Number of voting rights

% of voting rights

SUBTOTAL 8.B.2

9. Information in relation to the person subject to the notification obligation (please mark the applicable box with an "X")

Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer

Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entity (please add additional rows as necessary)

X

Name

% of voting rights if it equals or is higher than the notifiable threshold

% of voting rights through financial instruments if it equals or is higher than the notifiable threshold

Total of both if it equals or is higher than the notifiable threshold

Schroders plc

Schroder Administration Limited

Schroder Wealth Holdings Limited

Schroder & Co. Limited

5.003%

N/A

5.003%

Schroders plc

Schroder Administration Limited

Schroder Wealth Holdings Limited

Schroders (C.I.) Limited

Schroders plc

Schroder Administration Limited

Schroder International Holdings Limited

Schroder Investment Management Limited

Schroder Investment Management North America Limited

Schroders plc

Schroder Administration Limited

Schroder International Holdings Limited

Schroder Investment Management (Hong Kong) Limited

10. In case of proxy voting, please identify:

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional information

This disclosure has been made due to a legal entity crossing above the 5% threshold.

Place of completion

London

Date of completion

02.08.2017

Issuer contact details:

Capita Financial Services Administrators (Jersey) Limited

Telephone: 01534 847 410