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	SEC FILE NUMBER
	CUSIP NUMBER

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

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check one):		x  Form 10-K o  Form 20-F o  Form 11-K o  Form 10-Q o  Form 10-D o  Form N-SAR o  Form N-CSR
		For Period Ended:		December 31, 2005
		o   Transition Report on Form 10-K
		o   Transition Report on Form 20-F
		o   Transition Report on Form 11-K
		o   Transition Report on Form 10-Q
		o   Transition Report on Form N-SAR
		For the Transition Period Ended:

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

PART I — REGISTRANT INFORMATION

Insignia Solutions plc

Full Name of Registrant

Former Name if Applicable

51 East Campbell Avenue, Suite 130

Address of Principal Executive Office (Street and Number)

Campbell, CA 95008

City, State and Zip Code

PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

x
			(a)		The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense
			(b)		The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
			(c)		The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III — NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q,10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

The Registrant is unable to file its Annual Report on Form 10-K for the year ended December 31, 2005 (the “Form 10-K”) by the prescribed due date because the Registrant and its independent registered public accounting firm are still in the process of completing and auditing the Registrant’s financial statements for year ended December 31, 2005. The Registrant seeks relief pursuant to Rule 12b-25(b) with respect to the Form 10-K. The Form 10-K will be filed on or before the fifteenth calendar day following the prescribed due date.

SEC 1344 (03-05)		Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

(Attach extra Sheets if Needed)
PART IV — OTHER INFORMATION

(1)

Name and telephone number of person to contact in regard to this notification

John Davis		(408)		874-2613
(Name)		(Area Code)		(Telephone Number)

(2)		Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed ? If answer is no, identify report(s).
		Yes x     No o

(3)		Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?
		Yes x     No o
		If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.
		Please see Attachment A.

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

Date		April 3, 2006		By		/s/ John Davis
						John Davis Chief Financial Officer

Attachment A

As reported in the Registrant’s press release issued on March 15, 2006, the Registrant anticipates:

•

total revenue for the Registrant’s fourth quarter of 2005 to be between $1.1 million and $1.2 million as compared to $8,000 for the Registrant’s fourth quarter of 2004;

•

net operating loss for the Registrant’s fourth quarter of 2005 to be between $1.2 million and $1.3 million as compared to $2.1 million for the Registrant’s fourth quarter of 2004;

•

total revenue for the fiscal year ended December 31, 2005 to be between $3.1 million and $3.2 million as compared to $0.5 million for the fiscal year ended December 31, 2004; and

•

net operating loss for the fiscal year ended December 31, 2005 to be between $6.6 million and $6.8 million as compared to $7.1 million for the fiscal year ended December 31, 2004.

The Registrant’s results of operations for the quarter and year ended December 31, 2005 include the results of Mi4e Device Management AB (“Mi4e”), which the Registrant acquired on March 16, 2005.