Kenneth Song - 26 Feb 2024 Form 4 Insider Report for RayzeBio, Inc.

Footnote F1

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated December 25, 2023, by and among RayzeBio, Inc. (the "Issuer"), Bristol-Myers Squibb Company ("BMS") and, by way of a joinder dated December 26, 2023, Rudolph Merger Sub Inc., a wholly owned subsidiary of BMS ("Purchaser"), on February 22, 2024, Purchaser completed a tender offer for shares of common stock of the Issuer (each, a "Share") and thereafter merged with and into the Issuer, with the Issuer continuing as the surviving corporation and a wholly owned subsidiary of BMS (the "Merger"). Pursuant to the terms of the Merger Agreement, the Shares were tendered and disposed of at the Offer Acceptance Time (as defined in the Merger Agreement) in exchange for the right to receive the $62.50 per Share in cash, without interest, subject to any applicable withholding of taxes (the "Cash Amount"). At the effective time of the Merger, each issued and outstanding Share was cancelled in exchange for the Cash Amount.

Footnote F2

Includes 873 shares acquired pursuant to the Issuer's Employee Stock Purchase Plan on February 22, 2024.

Footnote F3

The Song Family Trust dated October 14, 2016, or the Song Trust. Dr. Song is a trustee of the Song Trust, and may be deemed to have voting and investment power over the shares held by the Song Trust.

Footnote F4

At the effective time of the Merger, pursuant to the Merger Agreement, each outstanding option was accelerated and became fully vested and exercisable and was cancelled and automatically converted into the right to receive cash, without interest, in an amount equal to the product of (i) the total number of Shares subject to such option multiplied by (ii) the excess of (x) $62.50 per Share over (y) the exercise price payable per Share under such option, which amount will be subject to any withholding taxes.