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, told Costain Group PLC on November 3, 2026 that it held 10.993200% of Costain's voting rights on November 2, 2026, after an event changing the breakdown of voting rights. Its previous notification showed a total of 11.023100%.

Key details

  • Of the total, 8.754500% (22843198 voting rights) is attached to shares, and 2.238700% (5841359 voting rights) is held through cash-settled CFDs (contracts for difference, which track the share price without owning the shares).
  • The total number of voting rights held is 28684557.
  • In its previous notification, FIL Limited held 8.780000% through shares and 2.243100% through financial instruments.
  • The voting rights are held through a chain of FIL Limited companies: FIL Financial Services Holdings Limited, FIL Financial Services Holdings 2 Limited, FIL Holdings (UK) Limited and FIL Investments International.

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

Costain Group PLC
03 November 2026
 

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

02-Nov-2026

6. Date on which Issuer notified

03-Nov-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

8.754500

2.238700

10.993200

28684557

Position of previous notification (if applicable)

8.780000

2.243100

11.023100

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

22843198

8.754500

Sub Total 8.A

22843198

8.754500%

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

5841359

2.238700

Sub Total 8.B2

5841359

2.238700%

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

8.754500

2.238700

10.993200%

FIL Limited

FIL Financial Services Holdings Limited

8.754500

2.238700

10.993200%

FIL Limited

FIL Financial Services Holdings 2 Limited

8.754500

2.238700

10.993200%

FIL Limited

FIL Holdings (UK) Limited

8.754500

2.238700

10.993200%

FIL Limited

FIL Investments International

8.754500

2.238700

10.993200%

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

03-Nov-2026

13. Place Of Completion

Dublin, Ireland

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