QuickLinks -- Click here to rapidly navigate through this document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (date of earliest event reported): September 17, 2003

CoBiz Inc.
(Exact name of registrant as specified in its charter)

Colorado
(State or other jurisdiction
of incorporation)
  000-24445
(Commission
File Number)
  84-0826324
(IRS Employer
Identification No.)


821 17th Street
Denver, Colorado 80202
(Address of principal executive offices and zip code)

(303) 293-2265
Registrant's telephone number, including area code





ITEM 5. OTHER EVENTS

        On September 17, 2003, CoBiz Inc. issued a press release announcing the raising of $20 million in a trust-preferred securities offering. The press release is attached hereto as Exhibit 99.1.

2



SIGNATURE

        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 hereunto duly authorized.


 

 

COBIZ INC.

 

 

By:

 

/s/  
LYNE B. ANDRICH      
Lyne B. Andrich
Executive Vice President and
Chief Financial Officer

Date: September 17, 2003

3



EXHIBIT INDEX

Exhibit
Number

  Description

99.1   Press release of CoBiz Inc. on September 17, 2003

4




QuickLinks

SIGNATURE
EXHIBIT INDEX