As filed with the Securities and Exchange Commission on July 6, 2006.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 15

CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES
EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934.

Commission File Number 1-03605

KAISER ALUMINUM & CHEMICAL CORPORATION

(Exact name of registrant as specified in its charter)

27422 Portola Parkway, Suite 350
Foothill Ranch, California 92610-2831
(949) 614-1740
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

4-1/8% Cumulative Convertible Preference Stock, par value $100.00 per share, 4-3/4% Cumulative
Convertible Preference Stock, par value $100.00 per share, 4-3/4% Cumulative Convertible Preference
Stock, par value $100.00 per share, and 4-3/4% Cumulative Convertible Preference Stock, par value $100.00 per share
(Title of each class of securities covered by this Form)

None
(Title of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

Rule 12g-4(a)(1)(i)	x	Rule 12h-3(b)(1)(i)	x
Rule 12g-4(a)(1)(ii)	o	Rule 12h-3(b)(1)(ii)	o
Rule 12g-4(a)(2)(i)	o	Rule 12h-3(b)(2)(i)	o
Rule 12g-4(a)(2)(ii)	o	Rule 12h-3(b)(2)(ii)	o
		Rule 15d-6	o

Approximate number of holders of record as of the certification or notice date: None

Pursuant to the requirements of the Securities Exchange Act of 1934, Kaiser Aluminum & Chemical Corporation has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

Date: July 6, 2006	By:	/s/ John M. Donnan
		John M. Donnan
		Vice President, Secretary & General Counsel