Exhibit 99.1 PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF SLIPPERY ROCK FINANCIAL CORPORATION FOR THE SPECIAL MEETING OF SHAREHOLDERS SEPTEMBER 9, 2004 The undersigned shareholders of Slippery Rock Financial Corporation, Slippery Rock, Pennsylvania (the "Corporation") do(es) hereby appoint Dale R. Wimer my (our) true attorney, with full power of substitution, to vote all shares of common stock of the Corporation that the undersigned would be entitled to vote at the Special Meeting of Shareholders to be held at the Grove City Country Club, 73 Country Club Road, Grove City, Pennsylvania 16127, on September 9, 2004 at 10:00 a.m., and at any adjournment, postponement or continuation thereof, as fully as the undersigned could if personally present. THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AT THE SPECIAL MEETING. IF NO CHOICE IS INDICATED ON THE REVERSE SIDE HEREOF, SUCH SHARES WILL BE VOTED IN FAVOR OF PROPOSALS 1 AND 2. IF CHOICES ARE MADE, SUCH SHARES WILL BE VOTED IN ACCORDANCE WITH THE CHOICES SO INDICATED. The board of directors recommends a vote FOR each of the proposals. Please sign and date on reverse side. Slippery Rock Financial Corporation 100 South Main Street Slippery Rock, Pennsylvania 16057 Receipt is acknowledged of the Notice and Proxy Statement for said meeting, each dated July 23, 2004. (Continued and to be dated and signed on reverse side) Please mark your votes [X] 1. Proposal to approve and adopt the Amended and Restated Agreement and Plan of Merger dated as of May 5, 2004 between F.N.B Corporation and Slippery Rock Financial Corporation and approve the merger and other transactions contemplated by the Agreement and Plan of Merger. FOR AGAINST ABSTAIN [ ] [ ] [ ] 2. Proposal to grant discretionary authority to adjourn the special meeting if necessary to permit further solicitation of proxies to approve and adopt the Amended and Restated Agreement and Plan of Merger dated as of May 5, 2004 between F.N.B Corporation and Slippery Rock Financial Corporation. FOR AGAINST ABSTAIN [ ] [ ] [ ] 3. Upon such other matters as may properly come before our special meeting or any adjournment, postponement or continuation thereof: Signature(s) Dated , 2004 --------------------------------- --------------------- Please sign exactly as your name appears on this proxy. When signing as attorney, executor, administrator, guardian or corporate official, your title should be stated. If shares are held jointly, each holder should sign. VOTE BY INTERNET OR TELEPHONE OR MAIL 24 HOURS A DAY, 7 DAYS A WEEK INTERNET AND TELEPHONE VOTING IS AVAILABLE THROUGH 11:59 PM EASTERN TIME THE DAY PRIOR TO SPECIAL MEETING DAY. YOUR INTERNET OR TELEPHONE VOTE AUTHORIZES THE NAMED PROXIES TO VOTE YOUR SHARES IN THE SAME MANNER AS IF YOU MARKED, SIGNED AND RETURNED YOUR PROXY CARD. <Table> INTERNET TELEPHONE MAIL http://www.eproxy.com/srck 1-800-435-6710 Mark, sign and date your Use the Internet to vote your Use any touch-tone telephone proxy card and return it in proxy. Have your proxy card in hand OR to vote your proxy. Have your OR the enclosed postage-paid when you access the web site. proxy card in hand when you envelope. call. </Table> IF YOU VOTE YOUR PROXY BY INTERNET OR BY TELEPHONE, YOU DO NOT NEED TO MAIL BACK YOUR PROXY CARD.