SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

For the month of ~~August~~February, ~~2004~~2005

CIBA SPECIALTY CHEMICALS HOLDING INC.

(Exact name of Registrant as specified in its charter)

Klybeckstrasse 141
4002 Basel
Switzerland

(Address of principal executive offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)


Form 20-F þ		Form 40-F o

(Indicate by check mark whether ~~the registrant~~ by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2 (b) under the Securities Exchange Act of 1934.)


Yes o		No þ

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2 (b))

CIBA SPECIALTY CHEMICALS HOLDING INC.

On ~~August~~February 121, ~~2004~~2005, Ciba Specialty Chemicals Holding Inc., ~~Basel,~~ a stock corporation (organized under the laws ~~“Company”)~~of Switzerland, issued a ~~News~~news ~~Release~~release ~~regarding~~addressing its ~~Half~~financial ~~Year Results~~results of 2004,. aA ~~change~~copy inof ~~its~~the Annual ~~organizational~~Report ~~structure~~2004 and inNews ~~its Executive~~Release ~~Committee.~~are Ahereby ~~copy~~furnished ofpursuant ~~the~~to ~~News~~Rule 13a-16 ~~Release~~of ~~and~~ the ~~Half~~Securities Exchange ~~Year~~Act ~~Report~~of ~~2004~~1934 ~~are~~ and attached hereto as ~~Exhibits~~ Exhibit 99.1, and 99.2, respectively, and incorporated by by reference herein.

~~EXHIBIT INDEX~~2

Exhibit No.		Description
99.1		News Release: Ciba Specialty Chemicals posts higher sales and profits, dated August 12, 2004.
99.2		Half Year Report 2004.

EXHIBIT LIST


Exhibit		Description
99.1		Annual Report 2004
99.2		News Release dated February 1, 2005 of Ciba Specialty Chemicals Holding Inc.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Ciba Specialty Chemicals Holding Inc. (Registrant)
Date: August 12, 2004	By	/s/ Oliver Strub
		Oliver Strub
		Senior Corporate Counsel
	By	/s/ Max Dettwiler
		Max Dettwiler
		Head Taxes, Insurance & Corporate Law


	Ciba Specialty Chemicals Holding Inc.
	(Registrant)
By	/s/ Oliver Strub
	Oliver Strub
	Senior Corporate Counsel



	/s/ Max Dettwiler
	Max Dettwiler
	Head Taxes, Insurance & Corporate Law

Date February 1, 2005

Filing Compare · CIBA SPECIALTY CHEMICALS HOLDING INC /FI/