1 SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. ) Filed by the registrant [ ] Filed by a party other than the registrant [X] Check the appropriate box: [ ] Preliminary proxy statement [ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) [ ] Definitive proxy statement [X] Definitive additional materials [ ] Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12 SAFETY-KLEEN CORP. - -------------------------------------------------------------------------------- (Name of Registrant as Specified in Its Charter) LAIDLAW ENVIRONMENTAL SERVICES, INC. - -------------------------------------------------------------------------------- (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of filing fee (Check the appropriate box): [X] No fee required. [ ] Fee computed on table below per Exchange Act Rules 14a-6(a)(1) and 0-11. (1) Title of each class of securities to which transaction applies: - -------------------------------------------------------------------------------- (2) Aggregate number of securities to which transaction applies: - -------------------------------------------------------------------------------- (3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is calculated and state how it was determined): - -------------------------------------------------------------------------------- (4) Proposed maximum aggregate value of transaction: - -------------------------------------------------------------------------------- (5) Total fee paid: - -------------------------------------------------------------------------------- [ ] Fee paid previously with preliminary materials. - -------------------------------------------------------------------------------- [ ] Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the form or schedule and the date of its filing. (1) Amount previously paid: - -------------------------------------------------------------------------------- (2) Form, schedule or registration statement no.: - -------------------------------------------------------------------------------- (3) Filing party: - -------------------------------------------------------------------------------- (4) Date filed: - -------------------------------------------------------------------------------- 2 (LAIDLAW ENVIRONMENTAL SERVICES INC. LETTERHEAD) March 2, 1998 DEAR SAFETY-KLEEN SHAREHOLDER: We believe Safety-Kleen's Board has lost sight of one simple issue: SHAREHOLDER VALUE. In its relentless pursuit of a proposed $27.00 per share merger with S-K Parent Corp. (the "Buyout Merger") THE BOARD HAS CHOSEN TO REJECT THE OPINION OF ITS OWN INVESTMENT BANKERS, to ignore the votes of shareholders and to support what we believe to be an inferior offer. When you vote on the Buyout Merger on March 9, consider the following. LAIDLAW ENVIRONMENTAL'S OFFER PROVIDES GREATER VALUE, UPSIDE POTENTIAL AND SYNERGIES Laidlaw Environmental is offering $30(1) for each share of Safety-Kleen. The Laidlaw Environmental offer also allows Safety-Kleen shareholders to participate in the value that we believe will be created by combining two of the leading service companies in the hazardous and industrial waste management business. The strategic merger of Safety-Kleen with Laidlaw Environmental will combine the strengths of Safety-Kleen's premier service delivery and recycling system and its 400,000 small to medium sized customers with Laidlaw Environmental's network of fully permitted service centers and its 18,000 medium to large customers. We believe this merger will generate $100-$130 million of cost savings synergies that will benefit ALL continuing Laidlaw Environmental shareholders. - -------------------------------------------------------------------------------- FACT: SAFETY-KLEEN'S OWN INVESTMENT BANKER AND ISS SAY THE LAIDLAW ENVIRONMENTAL OFFER IS SUPERIOR "...it is our opinion as investment bankers that it is more likely than not that, as of the time of the anticipated closing of the Current LLE Offer, the value of the consideration which would be received under the Current LLE Offer would exceed the value of the consideration which would be received in the Merger." From letter dated January 31, 1998 from William Blair & Company, L.L.C. to the Board of Directors of Safety-Kleen Corp. "On balance, we believe that [Laidlaw Environmental's] offer is superior to the proposed Philip Group merger.... Due to these factors, we believe that [the Safety-Kleen] shareholders should not support this merger agreement." From February 5, 1998 report of Institutional Shareholder Services, the leading independent proxy advisory firm. - -------------------------------------------------------------------------------- - ------------------------------------ (1) The Offer consists of $18 cash and $12 of Laidlaw Environmental Services Inc. Common Stock, assuming the fair market price of Laidlaw Environmental Common stock is not less than $4.28571. The actual fair market value of the Laidlaw Environmental Common Stock to be exchanged pursuant to the Laidlaw Environmental offer may vary, and will be less than $12.00 if the market price on the day of exchange is less than $4.28571. 3 THE SAFETY-KLEEN BOARD CONTINUES TO IGNORE THE WISHES OF SHAREHOLDERS SAFETY-KLEEN SHAREHOLDERS SIMPLY HAVE NOT DEMONSTRATED SUPPORT FOR THE BUYOUT MERGER. Although approximately 54% of the Safety-Kleen shareholders tendered into our Offer as of February 13, 1998, we recognize that these shareholders could also vote in favor of the Buyout merger. However, Safety-Kleen has twice adjourned the shareholder meeting at which the Buyout Merger is to be considered -- from February 11 to February 25, and from February 25 to March 9. Based on information released by Safety-Kleen after the February 5 adjournment, as of February 25 LESS THAN 50%of the outstanding Safety-Kleen shares have been voted in favor of the Buyout Merger. When will the Board face the fact -- SHAREHOLDERS DO NOT SUPPORT THE BUYOUT MERGER. WE HAVE GONE TO COURT TO SEEK RELIEF Because less than one-half of Safety-Kleen's shareholders supported the Buyout Merger proposal and in light of Safety-Kleen's adjournment of the February 25 special meeting to March 9, Laidlaw Environmental is seeking an injunction requiring the Safety-Kleen Board to remove all remaining impediments to the Laidlaw Environmental offer. NOW YOU SHOULD TELL THE BOARD TO STOP STONEWALLING -- VOTE AGAINST THE BUYOUT MERGER Preserve your opportunity to participate in Laidlaw Environmental's premium offer by voting AGAINST THE BUYOUT MERGER PROPOSAL. Laidlaw Environmental is committed to its offer. If Safety-Kleen shareholders reject the Buyout Merger, Laidlaw will not withdraw its offer until Safety-Kleen's shareholders have had sufficient time to accept the Laidlaw Environmental offer. Let the Safety-Kleen board of directors know YOU WILL NOT SETTLE FOR THE BUYOUT MERGER. - -------------------------------------------------------------------------------- VOTE AGAINST THE BUYOUT MERGER - -------------------------------------------------------------------------------- SIGN, DATE AND RETURN THE GREEN-STRIPED PROXY CARD TODAY. - -------------------------------------------------------------------------------- IF YOU NEED ASSISTANCE OR INFORMATION, PLEASE CALL OUR PROXY SOLICITOR: MORROW & CO., INC. @ (800) 662-5200 - -------------------------------------------------------------------------------- THIS SOLICITATION RELATES SOLELY TO THE SOLICITATION OF PROXIES WITH RESPECT TO THE MARCH 9, 1998 MEETING AND IS NOT A REQUEST FOR THE TENDER OF SHARES OF SAFETY-KLEEN COMMON STOCK. THE DETAILED TERMS AND CONDITIONS OF THE LAIDLAW ENVIRONMENTAL OFFER ARE SET FORTH IN THE AMENDED PROSPECTUS OF LAIDLAW ENVIRONMENTAL AND THE RELATED LETTER OF TRANSMITTAL WHICH HAVE BEEN SEPARATELY MAILED TO SAFETY-KLEEN SHAREHOLDERS.