Capital B : confirme l’acquisition de 37 BTC pour 2,3 M€, la détention d’un total de 2 925 BTC, et un ‘BTC Yield’ de 1,25% depuis le début de l’année ENGLISH

About this update from Capital B

Press Release 1 April 13, 2026, 08:00 CET Capital B confirms the acquisition of 37 BTC for €2.3 million, the holding of a total of 2,925 BTC, and a BTC Yield of 1.25% YTD Completion of the conversion of 17,897,600 OCA B-01 held by Blockstream Capital Partners into 32,900,000 ordinary shares of the Company Completion of the subscription by Blockstream Capital Partners of 4,700,000 ordinary shares of the Company at €0.544 per share, for an amount of €2.55 million, as part of the legal adjustment measures for OCA B-01 holders Completion of the conversion of the 2,020,372 OCA B-01 held by UTXO Management into 3,713,919 ordinary shares of the Company Subscription by UTXO Management of 530,559 ordinary shares of the Company at €0.544 per share, for an amount of €0.29 million, as part of the legal adjustment measures for OCA B-01 holders Exercise of 4,464,712 BSA 2025-01 into 637,816 ordinary shares of the Company, for an amount of €0.35 million, the Company reminding that the rights attached to the BSA 2025-01 became null and void and consequently lost all value on April 10, 2026 at midnight, in accordance with the terms and conditions of the BSA 2025-01 Acquisition of 37 BTC for an amount of €2.3 million BTC Yield of 1.25% YTD and 0.53% QTD BTC Gain of 35.3 BTC YTD and 15.2 BTC QTD BTC € Gain of €2.2 million YTD and €0.9 million QTD Total group holdings of 2,925 BTC with an acquisition value of €269.4 million at €92,096 per bitcoin, corresponding to the average unitary acquisition cost of the BTC held as part of the Bitcoin Treasury Puteaux, April 13, 2026: Capital B (The Blockchain Group, ISIN: FR0011053636, ticker: ALCPB) (the "Company"), listed on Euronext Growth Paris, Europe's first Bitcoin Treasury Company, holding subsidiaries specialized in Data Intelligence, AI, decentralized technology consulting and development, and corporate treasury, announces the completion of the conversion of 17,897,600 OCA B-01 held by Blockstream Capital Partners into 32,900,000 shares of the company and of the 2,020,372 OCA B-01 held by UTXO Management into 3,713,919 ordinary shares of the Company. The Company confirms the subscription by Blockstream Capital Partners of 4,700,000 shares at €0.544 per share and the subscription by UTXO Management of 530,559 shares at €0.544 per share for a total amount of €2.8 million, as part of the legal adjustment measures for OCA B-01 holders. The Company also announces the exercise of 4,464,712 BSA 2025-01 into 637,816 ordinary shares of the Company, for an amount of €0.35 million, reminding that the rights attached to the BSA 2025-01 became null and void and consequently lost all value on April 10, 2026 at midnight, in accordance with the terms and conditions of the BSA 2025-01. The Company has thus acquired 37 BTC for an amount of €2.3 million. The Group has achieved since the beginning of the year a 'BTC Yield' of 1.25%, a 'BTC Gain' of 35.3 BTC, and a 'BTC € Gain' of €2.2 million. As of today, Capital B and its subsidiary Capital B Luxembourg SA hold a total of 2,925 BTC as part of the Bitcoin Treasury Company strategy, with an acquisition value of €269.4 million, based on an average price of €92,096 per bitcoin. A detailed presentation of the Company's Bitcoin Treasury Company strategy, focused on increasing the number of bitcoin per fully diluted share over time, is available on the Company's website: https://cptlb.com/about/who-we-are/ Completion of the conversion of 17,897,600 OCA B-01 held by Blockstream Capital Partners and of the 2,020,372 OCA B-01 held by UTXO Management On March 30, 2026, the Company announced that Blockstream Capital Partners 1 requested the conversion of 17,897,600 OCA B-01, resulting in the issuance of 32,900,000 new shares of the Company at a unit conversion price of €0.544, and that UTXO Management also requested the conversion of all of its 2,020,372 OCA B-01, resulting in the issuance of 3,713,919 new shares of the Company at a unit conversion price of €0.544. The company hereby confirms the completion of the conversion requests, resulting in the issuance of 36,613,919 new ordinary shares of the Company at a unit conversion price of €0.544, as follows: Investor Number of OCA B-01 converted Number of shares resulting from conversion Number of OCA B-01 remaining after conversion Blockstream Capital Partners 17,897,600 32,900,000 14,195,352 UTXO Management 2,020,372 3,713,919 0 TOTAL 19,917,972 36,613,919 14,195,352 The issuance of the 36,613,919 new ordinary shares of the Company is fully paid up through set-off of debt. In accordance with the provisions of Article R. 225-134 of the French Commercial Code, the payment of the new ordinary shares by way of set-off against a receivable from the Company is recorded in a statement of account drawn up by the Board of Directors and certified as accurate by the Statutory Auditor. 1 Previously named Blockstream Capital Holdings in the press release of March 30, 2026 Realization of the subscription by Blockstream Capital Partners and by UTXO Management of ordinary shares as part of the legal adjustment measures for OCA B-01 holders On March 30, 2026, the Company announced that following the conversion of their OCA B-01, Blockstream Capital Partners and UTXO Management benefit from the legal adjustment measures for OCA B-01 holders following the free allocation of BSA 2025-01 warrants to all shareholders (see the press release dates April 7, 2025). Indeed, in accordance with the provisions of Article L.225-99 of the French Commercial Code and the terms and conditions of the OCA B-01 tranches, holders of OCA B-01 who convert them receive BSA 2025-01 warrants under the same conditions as shareholders on April 11, 2025 (i.e., one BSA 2025-01 warrant per new share received upon conversion). They may therefore subscribe for one new share for every seven BSA 2025-01, at an exercise price of €0.544. As part of this, Blockstream Capital Partners has subscribed to 4,700,000 new shares at a unit subscription price of €0.544 (the exercise price of the BSA 2025-01 warrants), for a total amount of €2,556,800.00. In the same way, UTXO Management has subscribed to 530,559 new shares at a unit price of €0.544, for a total amount of €288,624.10. Those two capital increases were carried out in cash. They were authorized under the 1 st resolution of the General Meeting of February 21, 2025, pursuant to which the BSA 2025-01 warrants had been granted for free to all shareholders. The Company hereby announces the completion of the transaction resulting in the issuance of 5,230,559 ordinary shares of the Company, at a unit subscription price of €0.544, for a total amount of €2,845,424.10. Exercise of BSA 2025-01 warrants into ordinary shares of the Company On April 07, 2025, the Company also announced the free allocation of BSA 2025-01 to its shareholders in order to accelerate its Bitcoin strategy, with a conversion ratio of 7 BSA 2025-01 for 1 new share of the Company, at a subscription price of €0.544 per new share. The Company hereby confirms the new conversion of 4,464,712 BSA 2025-01 into 637,816 new shares of the Company, for a total amount of €346,971.904. The main characteristics of the BSA 2025-01 issuance were detailed in the press release dates April 7, 2025. The Company further reminds that the rights attached to the BSA 2025-01 have become null and void and consequently lost all value on April 10, 2026 at midnight, in accordance with the terms and conditions of the BSA 2025-01 accessible at the following link . Impact of the operations on the distribution of the Company's share capital The impact of the completion of the operations described above on the distribution of the Company's share capital is as follows: Ordinary basis Fully diluted basis (*) Shareholders Number of shares % capital Number of shares % capital Executives 20,390,993 7.49% 22,428,671 5.64% Blockstream Capital Partners 43,118,442 15.84% 151,107,221 38.00% Adam Back 37,573,329 13.80% 38,548,400 9.69% TOBAM 9,491,788 3.49% 16,897,277 4.25% UTXO Management 4,244,478 1.56% 4,244,478 1.07% Peak Hodl Ltd 2,500,000 0.92% 2,500,000 0.63% Public & Institutionnel 154,890,991 56.90% 161,896,852 40.72% TOTAL 272,210,021 100% 397,622,899 100% (*) Calculations performed based on the number of shares comprising the Company's share capital as of the press release date, adding the shares resulting from (i) the conversion of all OCAs issued or announced, (ii) conservatively, the exercise of BSA 2025-01 (see press release dated April 7, 2025) and the issuance under legal adjustment measures for the benefit of the holders of OCA B-01, and (iii) the free shares granted by the Company to certain employees and corporate officers, but not yet definitively acquired by their beneficiaries, the number of which amounts to 2,320,760 as of the date of this press release. It is noted that the Company is authorized to issue additional free shares within the limit provided by the resolutions of the general meeting of June 10, 2025. However, this fully diluted basis does not include (i) the shares that may correspond to the amounts not yet subscribed to date of the authorized €300M capital increases for the benefit of TOBAM, (ii) the future potential exercise of BSA 2026-01, and (iii) the exercise of the BSA OC A-03, A-04, and A-05. The Company indicates (see note below the table above) that it has, conservatively, included in the fully diluted share base the shares that could be issued upon the exercise of BSA 2025-01 (see press release dated April 7, 2025) and legal adjustment measures in favor of OCA B-01 holders. Accordingly, any potential future exercise of BSA 2025-01 warrants or issuance of shares under these legal adjustment measures will not result in any additional shares on a fully diluted basis. Expansion of the Company's bitcoin holdings Capital B announces the final completion of the acquisition of an additional 37 BTC using the proceeds from the final completion of the operation described above, as part of the continuation of its Bitcoin Treasury Company strategy. Swissquote Bank Europe SA , a virtual asset service provider (VASP) registered with the Luxembourg regulator (CSSF), executed the acquisition of the BTC using the proceeds from the capital increase operation and was entrusted with their secure custody via the technological solution of Swiss company Taurus. Detail of the Group's BTC acquisitions: Reported Date BTC Acquisition BTC Acquisition € Cost Basis Total BTC Holdings Total BTC € Cost Basis 1 Total BTC € Cost Total BTC € Net Asset Value 2 April 13, 2026 37 €60,892 2,925 €92,096 €269,379,886 €181,493,325 March 23, 2026 44 €61,763 2,888 €92,495 €267,126,900 €174,449,640 March 16, 2026 8 €60,934 2,844 €92,971 €264,409,342 €178,543,476 March 9, 2026 2 €61,660 2,836 €93,061 €263,921,868 €167,411,916 February 16, 2026 6 €55,270 2,834 €93,083 €263,798,549 €165,086,168 February 9, 2026 5 €64,124 2,828 €93,164 €263,466,929 €168,062,384 November 25, 2025 5 €88,968 2,823 €93,215 €263,146,305 €213,319,995 October 20, 2025 6 €96,231 2,818 €93,223 €262,701,464 €271,178,254 September 29, 2025 12 €95,935 2,812 €93,216 €262,124,079 €269,770,581 September 22, 2025 551 €99,272 2,800 €93,205 €260,972,853 €277,962,677 September 15, 2025 48 €98,575 2,249 €91,718 €206,273,769 €221,695,332 August 11, 2025 126 €98,746 2,201 €91,568 €201,542,166 €217,339,641 August 5, 2025 62 €99,889 2,075 €91,133 €189,100,187 €207,269,347 July 28, 2025 58 €102,211 2,013 €90,863 €182,907,079 €205,751,541 July 21, 2025 22 €101,112 1,955 €90,526 €176,978,818 €197,674,331 July 14, 2025 29 €95,225 1,933 €90,406 €174,754,350 €184,069,828 July 7, 2025 116 €92,175 1,904 €90,332 €171,992,827 €175,501,059 June 30, 2025 60 €91,879 1,788 €90,213 €161,300,535 €164,280,027 June 23, 2025 75 €91,792 1,728 €90,155 €155,787,783 €158,616,662 June 17, 2025 182 €93,264 1,653 €90,081 €148,903,379 €154,165,568 June 2, 2025 624 €96,447 1,471 €89,687 €131,929,311 €141,874,161 May 22, 2025 227 €93,518 847 €84,706 €71,746,119 €79,209,857 March 26, 2025 580 €81,550 620 €81,480 €50,517,503 €50,560,770 December 4, 2024 25 €90,511 40 €80,468 €3,218,718 €3,261,985 November 5, 2024 15 €63,729 15 €63,729 €955,941 €1,223,244 The Total BTC € Cost Basis corresponds to the average unitary acquisition cost of the BTC held as part of the Bitcoin Treasury Company strategy. For all press releases up to and including 20 October 2025, the Total BTC € Net Asset Value was calculated by multiplying the Total BTC Holdings as of the date reported in the above table by the latest BTC Acquisition € Cost Basis on that same date. Given the recent volatility in the price of BTC, the Company specifies that, starting 25 November 2025, the Total BTC € Net Asset Value is now calculated by multiplying the Total BTC Holdings as of the reported date by the BTC price at 18:00 CET on the trading day preceding the press release (source: Boursorama).

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