Costain Group PLCLSE: COST

Costain Group: Holding(s) in Company

· Issued by Costain Group PLC via RNS

Summary by 6ix AI

FIL Limited, based in Hamilton, Bermuda, notified COSTAIN GROUP PLC on October 20, 2026 that it held 11.023100% of the company's voting rights as of October 19, 2026. The notification was triggered by an event changing the breakdown of its voting rights.

Key details

  • The position is made up of 8.780000% held through shares (22,868,900 voting rights) and 2.243100% held through cash-settled CFDs (contracts for difference, which track the share price without owning the shares), covering 5,842,558 voting rights.
  • The total number of voting rights held is 28,711,458.
  • FIL Limited's previous notification showed 8.717800% through shares, 2.227200% through financial instruments and 10.945000% in total.
  • The voting rights are held through a chain of FIL Limited companies ending with FIL Investments International.

6ix AI wrote this summary from the release below and checked it against the release.

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00B64NSP76

Issuer Name

COSTAIN GROUP PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An event changing the breakdown of voting rights

3. Details of person subject to the notification obligation

Name

FIL Limited

City of registered office (if applicable)

Hamilton

Country of registered office (if applicable)

Bermuda

4. Details of the shareholder

Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above

City of registered office (if applicable)

Country of registered office (if applicable)

5. Date on which the threshold was crossed or reached

19-Oct-2026

6. Date on which Issuer notified

20-Oct-2026

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 held in issuer

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

8.780000

2.243100

11.023100

28711458

Position of previous notification (if applicable)

8.717800

2.227200

10.945000

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

8A. Voting rights attached to shares

Class/Type of shares ISIN code(if possible)

Number of direct voting rights (DTR5.1)

Number of indirect voting rights (DTR5.2.1)

% of direct voting rights (DTR5.1)

% of indirect voting rights (DTR5.2.1)

GB00B64NSP76

22868900

8.780000

Sub Total 8.A

22868900

8.780000%

8B1. Financial Instruments according to (DTR5.3.1R.(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

Sub Total 8.B1

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument

Expiration date

Exercise/conversion period

Physical or cash settlement

Number of voting rights

% of voting rights

CFD

Cash

5842558

2.243100

Sub Total 8.B2

5842558

2.243100%

9. Information in relation to the person subject to the notification obligation

2. 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 entities (please add additional rows as necessary)

Ultimate controlling person

Name of controlled undertaking

% 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

FIL Limited

FIL Limited

8.780000

2.243100

11.023100%

FIL Limited

FIL Financial Services Holdings Limited

8.780000

2.243100

11.023100%

FIL Limited

FIL Financial Services Holdings 2 Limited

8.780000

2.243100

11.023100%

FIL Limited

FIL Holdings (UK) Limited

8.780000

2.243100

11.023100%

FIL Limited

FIL Investments International

8.780000

2.243100

11.023100%

10. In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

If date does not apply, explain below

11. Additional Information

12. Date of Completion

20-Oct-2026

13. Place Of Completion

Dublin, Ireland

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