SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO/A (Rule 14d-100) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 Amendment No. 1 ONIX SYSTEMS INC. (Name of Subject Company) ONIX ACQUISITION INC. (Offeror) THERMO INSTRUMENT SYSTEMS INC. (Offeror) THERMO ELECTRON CORPORATION (Offeror) COMMON STOCK, PAR VALUE $0.01 PER SHARE (Title of Class of Securities) CUSIP 67088G 10 8 (CUSIP Number of Class of Securities) Seth H. Hoogasian, Esq. General Counsel Thermo Electron Corporation 81 Wyman Street Waltham, Massachusetts 02454-9046 (781) 622-1000 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons) with a copy to: Neil H. Aronson, Esq. Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. One Financial Center Boston, Massachusetts 02111 (617) 542-6000 CALCULATION OF FILING FEE Transaction Valuation(1): $30,003,669 Amount of Filing Fee(2): $6,001 (1) For purposes of calculating fee only. This amount is based upon (a) the maximum number of Shares to be purchased pursuant to the Offer and (b) the price offered per Share. (2) The amount of the filing fee, calculated in accordance with Regulation 240.0-11 under the Securities Exchange Act of 1934, as amended, equals 1/50 of one percent of the Transaction Valuation. [X] Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. Amount Previously Paid: $6,001 Form or Registration No.: Schedule TO Filing Party: Thermo Instrument Systems Inc. Date Filed: March 13, 2000 [ ] Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer. Check the appropriate boxes below to designate any transactions to which the statement relates: [X] third-party tender offer subject to Rule 14d-1. [ ] issuer tender offer subject to Rule 13e-4. [X] going-private transaction subject to Rule 13e-3. [ ] amendment to Schedule 13D under Rule 13d-2. Check the following box if the filing is a final amendment reporting the results of the tender offer: [ ] This Amendment No. 1 amends and supplements the Tender Offer Statement on Schedule TO relating to the offer by ONIX Acquisition Inc., a Delaware corporation (the "Purchaser") and a wholly-owned subsidiary of Thermo Instrument Systems Inc., a Delaware corporation ("Thermo Instrument"), to purchase all outstanding shares of common stock, par value $0.01 per share (the "Shares"), of ONIX Systems Inc., a Delaware corporation (the "Company"), at a purchase price of $9.00 per Share net to the seller in cash, without interest thereon, upon the terms and subject to the conditions set forth in the Offer to Purchase dated March 13, 2000 (the "Offer to Purchase"), a copy of which is attached as Exhibit 12(a)(1) to the Schedule TO, and in the related Letter of Transmittal (which, together with the Offer to Purchase, constitute the "Offer"), a copy of which is attached as Exhibit 12(a)(2) to the Schedule TO. ITEMS 2 AND 13 Item 2, and Items 2, 4 and 13(a)(3) of Item 13 of the Schedule TO are hereby amended by deleting the section of Offer to Purchase captioned "Certain Information Concerning The Company - Recently Released Financial Data" and replacing the information set out in the section of the Offer to Purchase captioned "Certain Information Concerning The Company - Financial Information" with the following: FINANCIAL INFORMATION. Set forth below is certain selected consolidated financial information with respect to the Company and its subsidiaries excerpted or derived from the audited consolidated financial statements contained in the Company's Annual Report on Form 10-K for its fiscal year ended January 1, 2000 (the "Company Report"). More comprehensive financial information is included in the Company Report and in other documents filed by the Company with the Commission (which may be inspected or obtained in the manner set forth above), and the following financial information is qualified in its entirety by reference to the Company Report and other documents and all of the financial information (including any related notes) contained therein or incorporated therein by reference. The selected financial information presented below as of and for the fiscal years ended January 1, 2000, January 2, 1999, January 3, 1998, December 28, 1996 and December 30, 1995, has been derived from the Company's Consolidated Financial Statements, which have been audited by Arthur Andersen LLP. The selected financial information as of and for the fiscal year ended December 31, 1994 has not been audited. SELECTED CONSOLIDATED FINANCIAL INFORMATION 1999 1998(a) 1997(b) 1996(c) 1995(d) 1994 -------- -------- -------- -------- -------- -------- (IN THOUSANDS EXCEPT PER SHARE AMOUNTS) STATEMENT OF INCOME DATA: Revenues.......................... $139,969 $153,653 $121,525 $95,316 $72,105 $62,059 Net Income........................ 2,319 8,000 8,799 4,858 3,627 1,264 Basic and Diluted Earnings per Share........................... .16 .55 .79 .46 .34 .12 Weighted Average Shares: Basic........................... 14,357 14,515 11,083 10,667 10,667 10,667 Diluted......................... 14,357 14,520 11,083 10,667 10,667 10,667 BALANCED SHEET DATA (AT END OF PERIOD): Working Capital................... $ 79,652 $ 74,843 $ 41,947 $29,873 $26,199 $13,327 Total Assets...................... 183,041 180,578 159,709 97,010 76,221 71,710 Shareholders' Investment.......... 147,920 146,547 104,938 73,110 59,791 50,795 OTHER DATA: Book Value per Share.............. $ 10.30 $ 10.21 $ 8.53 Cash Dividends.................... -- -- -- -- -- -- Ratio of Earnings to Fixed Charges (e)..................... 4.59x 11.28x 18.19x - ------------------------ (a) Reflects the July 1998 acquisition of the Mid-South Companies and the March 1998 initial public offering of Company common stock. (b) Reflects the acquisition of the Peek Measurement Business effective in November 1997, the December 1997 acquisition of Fluid Data, Inc. and the September and October 1997 private placements of Company common stock. (c) Reflects the October 1996 acquisition of Kay-Ray/Sensall and the March 1996 acquisition of VG Gas Analysis. (d) Reflects the July 1995 acquisition of Flow Automation. (e) For purposes of computing the ratios of earnings to fixed charges, "earnings" represent income before taxes, plus fixed charges. "Fixed charges" consist of interest on indebtedness and one-third of rental expense, which is deemed to be the interest component of such rental expense. ITEMS 6 AND 13 Item 6, and Item 7 of Item 13 are hereby amended by including just after the section of the Offer to Purchase captioned "Special Factors --Conduct Of The Company's Business If the Offer Is Not Completed" the following new section: STOCKHOLDER LITIGATION In late March 2000, a class action was filed in the Court of Chancery of the State of Delaware in and for New Castle County by a stockholder of the Company (the "Action"). The complaint in the Action names the Company, Thermo Instrument, Thermo Electron and the directors of the Company as defendants and alleges, among other things, that the Company's directors breached their respective fiduciary duties by not negotiating and/or reformulating the terms of the tender offer and that the proposed purchase price does not represent the true value of the Company's assets and future prospects. The complaint requests that the Court of Chancery, among other things, declare that the Action is a proper class action and enjoin the defendants from proceeding with, consummating or closing the proposed transaction. The Purchaser's obligations to accept for payment and pay for Shares tendered in the Offer will not be relieved if the Action is still pending immediately prior to the Expiration Date unless a court order or injunction is in effect that prohibits consummation of the Offer or the Merger. See "--Certain Conditions Of The Offer." ITEM 11. ITEM 11(b) is hereby amended as follows: The section of the Offer to Purchase captioned "The Tender Offer-- Certain Conditions Of The Offer" is amended such that the first three lines on page 35 of the Offer to Purchase are as follows: "shares and may amend or terminate the Offer if (1) the Minimum Condition has not been satisfied on or before the Expiration Date or (2) at any time on or after March 13, 2000 and on or before the Expiration Date, any of the following events shall occur:" ITEM 12. EXHIBITS. Item 12 of the Schedule TO is hereby amended by adding the following: Exhibit 12(j) Presentation materials provided to the special committee of the Board of Directors of Thermo Instrument by J.P. Morgan Securities Inc. and The Beacon Group Capital Services, LLC on January 29, 2000 in connection with the offer to purchase shares of common stock of ONIX Systems Inc. ITEM 13. Items 13(a)(1) and 13(a)(2) of Item 13 are hereby amended by replacing them with the following: (a)(1) The audited consolidated financial statements of the Company as of and for the fiscal years ended January 1, 2000 and January 2, 1999 are incorporated herein by reference to the Consolidated Financial Statements of the Company included as Exhibit 13 to the Company's Annual Report on Form 10-K for the fiscal year ended January 1, 2000 filed with the Commission on March 16, 2000. (2) Not applicable. SIGNATURE After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct. ONIX ACQUISITION INC. BY: /s/ Earl R. Lewis -------------------------------------- Name: Earl R. Lewis Title: President THERMO INSTRUMENT SYSTEMS INC. BY: /s/ Earl R. Lewis -------------------------------------- Name: Earl R. Lewis Title: President and Chief Executive Officer THERMO ELECTRON CORPORATION BY: /s/ Theo Melas-Kyriazi -------------------------------------- Name: Theo Melas-Kyriazi Title: Vice President and Chief Financial Officer Date: April 7, 2000 EXHIBIT INDEX EXHIBIT DESCRIPTION 12(a)(1)* Offer to Purchase dated March 13, 2000 12(a)(2)* Letter of Transmittal 12(a)(3)* Notice of Guaranteed Delivery 12(a)(4)* Letter from the Dealer Managers to Brokers, Dealers, Commercial Banks, Trust Companies and Nominees 12(a)(5)* Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Nominees 12(a)(6)* Summary Advertisement as published on March 13, 2000 12(a)(7)* Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9 12(a)(8) Press Release issued by Thermo Instrument on January 31, 2000 (incorporated herein by reference to Exhibit 99 to the Current Report on Form 8-K of Thermo Instrument filed with the Commission on February 1, 2000) 12(a)(9) Press Release issued by Thermo Electron on January 31, 2000 (incorporated herein by reference to Exhibit 99 to the Current Report on Form 8-K of Thermo Electron filed with the Commission on February 1, 2000) 12(a)(10)* Press Release issued by Thermo Instrument on March 13, 2000 12(b)* Loan Agreement dated as of March 1, 2000 between Thermo Electron and Thermo Instrument 12(c)* Opinion of J.P. Morgan Securities Inc. and The Beacon Group Capital Services, LLC dated January 29, 2000 12(d)* Not applicable 12(e)* Not applicable 12(f) Summary of Appraisal Rights (Included in Exhibit 12(a)(1) in the section captioned "The Merger; Appraisal Rights" and Schedule III to Exhibit 12(a)(1) ("Section 262 Of The Delaware General Corporation Law") 12(g)* Slide Presentation of Thermo Electron to Financial Analysts 12(h)* Not applicable 12(j) Presentation materials provided to the special committee of the Board of Directors of Thermo Instrument by J.P. Morgan Securities Inc. and The Beacon Group Capital Services, LLC on January 29, 2000 in connection with the offer to purchase shares of common stock of ONIX Systems Inc. * Previously filed