Janus Henderson Group plc – Plans of Reorganization, Merger, Acquisition or Similar – BamSEC

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Plans of Reorganization, Merger, Acquisition or Similar Filter

from 8-K 4 pages Via Email Confidential June 16, 2026 Jupiter Company Limited C/O Trian Fund Management, L.P. 280 Park Avenue, 41st Floor New York, Ny 10017 Attention: Brian L. Schorr Daniel R. Marx Email: Bschorr@trianpartners.com Dmarx@trianpartners.com General Catalyst Group Management, LLC 20 University Road, Fourth Floor Cambridge, Ma 02138 Attention: Christopher McCain E-Mail: Cmccain@generalcatalyst.com Re: Closing Date

from 8-K 5 pages Amendment No. 1 to Agreement and Plan of Merger

from DEFA14A 170 pages Agreement and Plan of Merger Among Jupiter Company Limited, Jupiter Merger Sub Limited, and Janus Henderson Group plc Dated as of December 21, 2025

from 8-K 170 pages Agreement and Plan of Merger Among Jupiter Company Limited, Jupiter Merger Sub Limited, and Janus Henderson Group plc Dated as of December 21, 2025

from 8-K 123 pages Henderson Group PLC Horizon Orbit Corp. Janus Capital Group Inc. Agreement and Plan of Merger Dated as of October 3, 2016