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: April 15, 2010 Frontier Financial Corporation (Exact name of registrant as specified in its charter)
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: April 26, 2010 Frontier Financial Corporation (Exact name of registrant as specified in its charter)
Washington (State of incorporation or organization)	000-15540 (Commission File Number)		91-1223535 (I.R.S. Employer Identification No.)
332 S.W. Everett Mall Way P.O. Box 2215 Everett, Washington (Address of principal executive offices)		98204 (Zip Code)
Registrant’s telephone number, including area code: (425) 514-0700
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 87.01 ~~Other~~Regulation ~~Events~~FD Disclosure.

OnManagement of Frontier Financial Corporation (Nasdaq: FTBK) (“Frontier”) recently learned of rumors on the Internet on April 1526, 2010, athat ~~purported~~an ~~securities~~investment ~~fraud~~group ~~class~~called ~~action~~Infinite ~~lawsuit~~Freedom Foundation was ~~commenced~~ in the ~~United~~process ~~States~~of ~~District~~making ~~Court~~a bid for ~~the~~Frontier. Frontier’s ~~Western~~president ~~District~~and ofchief ~~Washington~~executive inofficer, ~~Seattle~~Patrick ~~against~~M. ~~Frontier~~Fahey, said ~~Financial~~that ~~Corporation~~while ~~(the~~normally ~~“Corporation”),~~he ~~and~~would ~~several~~not as a matter of ~~its~~company ~~directors~~policy ~~and~~comment ~~officers~~on rumors, ~~Patrick~~given M.the ~~Fahey,~~recent ~~John~~speculation J.on ~~Dickson~~the Internet and elsewhere, ~~Michael~~he J.advises ~~Clementz and~~that ~~Carol~~to E.the ~~Wheeler~~company’s knowledge there is no basis for the rumor.

The ~~plaintiffs~~information ~~allege~~contained ~~that~~in ~~during~~this ~~the~~Item ~~class~~7.01 ~~period~~disclosure ~~from~~and ~~July~~Exhibit ~~22,~~99.1 ~~2008~~included towith ~~March~~this ~~16,~~Current ~~2010~~Report, ~~the~~is ~~defendants~~being ~~violated~~furnished ~~Sections~~pursuant ~~10(a)~~to ~~and~~Item ~~20(a)~~7.01 ~~of the Securities Exchange Act of 1934~~ and ~~SEC~~shall ~~Rule~~not ~~10b-5~~be bydeemed ~~issuing~~“filed” ~~materially~~for ~~false~~purposes ~~and~~of ~~misleading~~Section ~~statements~~18 ~~regarding~~of the ~~Corporation’s~~Securities ~~business~~Exchange ~~and~~Act ~~financial~~of ~~results~~1934, ~~failing~~as toamended ~~disclose~~ (the ~~extent~~ of“Exchange ~~delinquent commercial real estate loans and construction and land loans~~Act”), ~~and~~or ~~failing~~otherwise subject to ~~adequately~~the ~~and~~liabilities of ~~timely~~that ~~record losses for its impaired loans~~Section, ~~causing~~nor ~~its~~shall ~~financial~~such ~~results~~information ~~and~~be ~~its~~deemed ~~Tier 1 capital ratio~~ to be ~~materially~~incorporated ~~false,~~by ~~and~~reference ~~seek~~into anany ~~unspecified~~filing ~~amount~~under ofthe ~~compensatory~~Securities ~~damages,~~Act ~~attorneys’~~of ~~fees and costs~~1933, ~~and~~as ~~other~~amended ~~relief.~~(the ~~The~~“Securities ~~Corporation~~Act”), ~~its~~or ~~directors~~the ~~and~~Exchange ~~officers~~Act, ~~named~~except as ~~defendants~~otherwise ~~believe~~stated that the plaintiffs’ allegations are without merit and intend to vigorously defend this action. It is possible that additional complaints containing similar claims may be made by other plaintiffs. As is typical in ~~these types of claims, it is likely that all~~ such ~~cases will be consolidated into a single action~~filing.

~~Failure~~A bycopy ~~the Corporation to obtain a favorable resolution~~ of the ~~claims~~related ~~set~~press ~~forth~~release indated ~~the~~April ~~complaint~~27, ~~could have a material adverse effect on our business~~2010, ~~results~~is ofattached ~~operations~~as ~~and~~Exhibit ~~financial condition~~99.1 ~~Currently,~~and ~~the~~incorporated ~~amount~~by ofreference ~~such~~in ~~material~~this ~~adverse effect cannot be reasonably estimated~~report.

~~Forward-Looking~~Item 9.01 Financial Statements and Exhibits.

~~This~~(a) Not report includes forward-looking statements and Frontier Financial Corporation intends for such statements to be covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995applicable. These forward-looking statements describe Frontier Financial Corporation’s expectations regarding future events. Future events are difficult to predict and are subject to risk and uncertainty which could cause actual results to differ materially and adversely. Additional information regarding risks and uncertainties is included in Frontier Financial Corporation’s periodic filings on Forms 10-K and 10-Q with the Securities and Exchange Commission. Frontier Financial Corporation undertakes no obligation to revise or amend any forward-looking statements to reflect subsequent events or circumstances.

(b) Not applicable.

Exhibit 99.1	Press Release dated April 27, 2010.

SIGNATURES

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

	FRONTIER FINANCIAL CORPORATION
	(Registrant)
April 20, 2010	/s/ Patrick M. Fahey
April 27, 2010	/s/ Patrick M. Fahey
(Date)	Patrick M. Fahey Chief Executive Officer

Exhibit Index

99.1	Press Release dated April 27, 2010.

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