Klöckner & Co SE: Release according to Article 40, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

Notification of Major Holdings

1. Details of issuer

Name:	Klöckner & Co SE
Street:	Peter-Müller-Straße 24
Postal code:	40468
City:	Düsseldorf Germany
Legal Entity Identifier (LEI):	529900CQ31CN6GV5LL52

2. Reason for notification

	Acquisition/disposal of shares with voting rights
	Acquisition/disposal of instruments
	Change of breakdown of voting rights
X	Other reason: Expiration of instruments due to fulfillment of irrevocable undertaking to accept as part of a public takeover offer (irrevocable undertaking agreement)

3. Details of person subject to the notification obligation

Legal entity: Worthington Steel, Inc. City of registered office, country: Columbus, United States of America (USA)

4. Names of shareholder(s)
holding directly 3% or more voting rights, if different from 3.

Worthington Steel GmbH

5. Date on which threshold was crossed or reached:

10 Feb 2026

6. Total positions

	% of voting rights attached to shares (total of 7.a.)	% of voting rights through instruments (total of 7.b.1 + 7.b.2)	Total of both in % (7.a. + 7.b.)	Total number of voting rights pursuant to Sec. 41 WpHG
New	7.79 %	0.00 %	7.79 %	99750000
Previous notification	6.25 %	41.53 %	47.78 %	/

7. Details on total positions
a. Voting rights attached to shares (Sec. 33, 34 WpHG)

ISIN	Absolute		In %
	Direct (Sec. 33 WpHG)	Indirect (Sec. 34 WpHG)	Direct (Sec. 33 WpHG)	Indirect (Sec. 34 WpHG)
DE000KC01000	0	7769515	0.00 %	7.79 %
Total	7769515		7.79 %

b.1. Instruments according to Sec. 38 (1) no. 1 WpHG

Type of instrument	Expiration or maturity date	Exercise or conversion period	Voting rights absolute	Voting rights in %
			0	0.00 %
		Total	0	0.00 %

b.2. Instruments according to Sec. 38 (1) no. 2 WpHG

Type of instrument	Expiration or maturity date	Exercise or conversion period	Cash or physical settlement	Voting rights absolute	Voting rights in %
				0	0.00 %
			Total	0	0.00 %

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

	Person subject to the notification obligation is not controlled nor does it control any other undertaking(s) that directly or indirectly hold(s) an interest in the (underlying) issuer (1.).
X	Full chain of controlled undertakings starting with the ultimate controlling natural person or legal entity:

Name	% of voting rights (if at least 3% or more)	% of voting rights through instruments (if at least 5% or more)	Total of both (if at least 5% or more)
Worthington Steel, Inc.	%	%	%
The Worthington Steel Company	%	%	%
Worthington Steel GmbH	7.79 %	%	7.79 %

9. In case of proxy voting according to Sec. 34 para. 3 WpHG
(only in case of attribution of voting rights in accordance with Sec. 34 para. 1 sent. 1 No. 6 WpHG)

Date of general meeting:
Holding total positions after general meeting (6.) after annual general meeting:

Proportion of voting rights	Proportion of instruments	Total of both
%	%	%

10. Other explanatory remarks:

Date

11 Feb 2026