BAY CITY CAPITAL FUND IV CO INVESMENT FUND LP 3

3 · NEORX CORP · Filed May 4, 2006

Form 3

Period: 2006-04-26

10% Owner

Holdings

Common Stock
(indirect: See footnote)
4,275,506
Common Stock Warrants (right to buy)
Exercise: $0.77From: 2006-02-01Exp: 2011-02-01→ Common Stock (558,295 underlying)
Common Stock
452,586
Common Stock
20,996,987
Common Stock
(indirect: See footnote)
855,101

Footnotes (9)

[F1]Bay City Capital Fund IV, L.P. ("Fund IV"), Bay City Capital Fund IV Co-Investment Fund, L.P. ("Co-Investment IV"), Bay City Capital Management IV LLC ("Management IV") and Bay City Capital LLC ("BCC") are deemed to be a "group" for the purposes of Section 13(d) under the Securities Exchange Act of 1934
[F2]Represents shares of Common Stock held by Fund IV.
[F3]Represents shares of Common Stock held by Co-Investment IV.
[F4]Represents the indirect interest of Management IV in shares of Common Stock held by Fund IV and Co-Investment IV. Management IV is the general partner of Fund IV and Management IV. Management IV disclaims beneficial ownership in such shares.
[F5]Represents the indirect interest of BCC in shares of Common Stock held by Fund IV and Co-Investment IV. BCC is the manager of Management IV, the general partner of Fund IV and Management IV. BCC disclaims beneficial ownership in such shares.
[F6]Represents warrants held by Fund IV.
[F7]Represents warrants held by Co-Investment IV.
[F8]Represents the indirect interest of Management IV in warrants held by Fund IV and Co-Investment IV. Management IV disclaims beneficial ownership in such warrants.
[F9]Represents the indirect interest of BCC in warrants held by Fund IV and Co-Investment IV. BCC disclaims beneficial ownership in such warrants.

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