<Page> UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A AMENDED CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2002 BENCHMARK ELECTRONICS, INC. (Exact name of registrant as specified in its charter) TEXAS 1-10560 74-2211011 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) 3000 TECHNOLOGY DRIVE, ANGLETON, TEXAS 77515 (Address of principal executive offices) (Zip code) Registrant's telephone number, including area code: (979) 849-6550 <Page> ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS On August 13, 2002, Benchmark Electronics, Inc. (the "Company" or "Benchmark") filed a current report on Form 8-K to report the acquisition of ACT Thailand Manufacturing (Thailand) Public Company Limited ("ACT Thailand") and ACT Manufacturing Holdings UK Limited ("ACT UK"). Pursuant to Item 7(a)(4) of Form 8-K, the Company indicated that it would file certain financial information under Item 7 of Form 8-K no later than October 11, 2002. This amendment is filed to provide the required financial information and to amend the language of Section (a) of Item 7. (a) Financial statements of business acquired. The required financial information of ACT Thailand has been included hereto in Exhibits 99.1 and 99.2 to the Amended Current Report on Form 8-K/A. (b) Pro forma financial information. The required pro forma financial information included in this Amended Current Report on Form 8-K/A, which gives effect to the acquisition of ACT Thailand, is as follows: PRO FORMA FINANCIAL INFORMATION <Table> <Caption> PAGE ---- Unaudited Pro Forma Combined Condensed Financial Information 3 Unaudited Pro Forma Combined Condensed Balance Sheet as of June 30, 2002 4 Unaudited Pro Forma Combined Condensed Statement of Operations for the Year Ended December 31, 2001 5 Unaudited Pro Forma Combined Condensed Statement of Operations for the Six Months Ended June 30, 2002 6 Notes to Unaudited Pro Forma Combined Condensed Financial Statements 7 </Table> (c) Exhibits. The following exhibits are filed with this Amended Current Report on Form 8-K/A: <Table> <Caption> EXHIBIT NUMBER EXHIBIT DESCRIPTION ---------- -------------------------------------------------------------- 23.1 Consent of Experts. 99.1 ACT Manufacturing (Thailand) Public Company Limited audited consolidated financial statements as of and for the year ended November 24, 2001. 99.2 ACT Manufacturing (Thailand) Public Company Limited unaudited condensed consolidated financial statements as of and for the six months ended May 24, 2002. </Table> 1 <Page> CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS: This filing contains certain forward-looking statements within the scope of the Securities Act of 1933 and the Securities Exchange Act of 1934. The words "expect," "estimate," "anticipate," "predict," and similar expressions, and the negatives of such expressions, are intended to identify forward-looking statements. Although Benchmark believes that these statements are based upon reasonable assumptions, such statements involve risks, uncertainties and assumptions, including but not limited to industry and economic conditions, customer actions and the other factors discussed in Benchmark's Form 10-K for the year ended December 31, 2001 and its other filings with the Securities and Exchange Commission. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual outcomes may vary materially from those indicated. 2 <Page> BENCHMARK ELECTRONICS, INC. AND SUBSIDIARIES UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION The following unaudited pro forma combined condensed financial statements are not necessarily indicative of the combined results of operations for future periods or the results of operations that would have been realized had the Company and ACT Thailand been combined during the periods specified. The unaudited pro forma combined condensed financial statements and the related notes should be read in conjunction with the historical financial statements of Benchmark and ACT Thailand. On July 29, 2002, Benchmark Electronics, Inc. ("Benchmark") completed its previously announced acquisition (the "Acquisition") of all of the issued and outstanding capital stock of ACT Manufacturing Holdings UK Limited and 68,374,718 shares, constituting at least 99.77% of the issued and outstanding capital stock of ACT Manufacturing (Thailand) Public Company Limited. As consideration for the Acquisition, the Company paid $45.2 million in cash and estimates that direct acquisition costs will be $1.5 million. Benchmark is accounting for the acquisition utilizing the accounting principles promulgated by SFAS 141 and 142. Therefore, the effects of the acquisition will be reflected on Benchmark's financial statements from and after the acquisition date. Because ACT UK is not individually significant to Benchmark, their financial statements have not been included herein. The unaudited pro forma combined condensed balance sheet gives effect to the Acquisition as if it had occurred on June 30, 2002, and combines Benchmark's unaudited historical consolidated balance sheet as of June 30, 2002 with ACT Thailand's unaudited historical U.S. GAAP consolidated balance sheet as June 28, 2002. The unaudited pro forma combined condensed statement of operations for the year ended December 31, 2001, gives the effect to the Acquisition as if it had occurred on January 1, 2001, and combines Benchmark's historical consolidated statement of operations for the year ended December 31, 2001, with ACT Thailand's historical U.S. GAAP consolidated statement of operations for the year ended November 24, 2001. The unaudited pro forma combined condensed statement of operations for the six months ended June 30, 2002, gives the effect to the Acquisition as if it had occurred on January 1, 2001, and combines Benchmark's unaudited historical consolidated statement of operations for the six months ended June 30, 2002, with ACT Thailand's historical U.S. GAAP consolidated statement of operations for the six months ended May 24, 2002. 3 <Page> BENCHMARK ELECTRONICS, INC. UNAUDITED PRO FORMA COMBINED CONDENSED BALANCE SHEET (IN THOUSANDS) <Table> <Caption> ACT BENCHMARK THAILAND HISTORICAL HISTORICAL AS OF AS OF JUNE 30, JUNE 28, PRO FORMA 2002 2002 ADJUSTMENTS COMBINED ------------- ------------- ----------------- ------------- ASSETS Cash and cash equivalents $ 225,976 $ 14,620 $ (38,200)(a) $ 202,396 Accounts receivable, net 191,585 22,213 -- 213,798 Inventories, net 195,682 29,696 636 (b) 226,014 Prepaid expense and other current assets 29,849 2,690 -- 32,539 ------------- ------------- ----------------- ------------- Total current assets 643,092 69,219 (37,564) 674,747 Net property, plant and equipment 80,733 17,674 -- 98,407 Goodwill, net 119,506 86,001 (77,356)(c) 128,151 Other assets, net 15,031 28 -- 15,059 ------------- ------------- ----------------- ------------- Total assets $ 858,362 $ 172,922 $ (114,920) $ 916,364 ============= ============= ================= ============= LIABILITIES AND SHAREHOLDERS' EQUITY Current installments of long-term debt $ 23,415 $ 4,994 $ -- $ 28,409 Notes payable -- 15,677 -- 15,677 Accounts payable 188,988 17,806 -- 206,794 Accrued expenses and other 37,836 4,449 1,268 (d) 43,553 ------------- ------------- ----------------- ------------- Total current liabilities 250,239 42,926 1,268 294,433 Long-term debt 112,714 13,808 -- 126,522 Other long-term liabilities 18,702 -- -- 18,702 Shareholders' Equity: Common stock 2,419 15,679 (15,679)(e) 2,419 Additional paid-in capital 432,412 85,783 (85,783)(e) 432,412 Retained earnings 57,969 14,776 (14,776)(e) 57,969 Accumulated other comprehensive loss (15,973) (50) 50 (e) (15,973) Treasury shares (120) -- -- (120) ------------- ------------- ----------------- ------------- Total shareholders' equity 476,707 116,188 (116,188) 476,707 ------------- ------------- ----------------- ------------- Total liabilities and shareholders' equity $ 858,362 $ 172,922 $ (114,920) $ 916,364 ============= ============= ================= ============= </Table> 4 <Page> BENCHMARK ELECTRONICS, INC. UNAUDITED PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS (IN THOUSANDS) <Table> <Caption> ACT BENCHMARK THAILAND HISTORICAL HISTORICAL YEAR ENDED YEAR ENDED DECEMBER 31, NOVEMBER 24, PRO FORMA 2001 2001 ADJUSTMENTS COMBINED --------------- --------------- -------------- -------------- Sales $ 1,276,950 $ 207,380 -- $ 1,484,330 Cost of goods sold 1,183,440 183,588 -- 1,367,028 --------------- --------------- -------------- -------------- Gross profit 93,510 23,792 -- 117,302 Selling, general and administrative 54,383 6,731 -- 61,114 Restructuring charges 7,569 -- -- 7,569 Asset write-offs 61,720 -- -- 61,720 Amortization of goodwill 12,219 9,904 (9,904)(f) 12,219 --------------- --------------- -------------- -------------- Income (loss) from operations (42,381) 7,157 9,904 (25,320) Interest expense (16,998) (2,669) -- (19,667) Other income 1,086 3,505 -- 4,591 --------------- --------------- -------------- -------------- Income (loss) before income taxes (58,293) 7,993 9,904 (40,396) Income tax benefit (expense) 3,981 (449) -- 3,532 --------------- --------------- -------------- -------------- Net income (loss) $ (54,312) $ 7,544 $ 9,904 $ (36,864) =============== =============== ============== ============== Net loss per share: Basic $ (2.77) $ (1.88) Diluted $ (2.77) $ (1.88) =============== ============== Shares used to compute net loss per share: Basic 19,625 19,625 Diluted 19,625 19,625 =============== ============== </Table> 5 <Page> BENCHMARK ELECTRONICS, INC. UNAUDITED PRO FORMA COMBINED CONDENSED STATEMENT OF OPERATIONS (IN THOUSANDS) <Table> <Caption> ACT BENCHMARK THAILAND HISTORICAL HISTORICAL SIX MONTHS SIX MONTHS ENDED ENDED PRO FORMA JUNE 30, 2002 MAY 24, 2002 ADJUSTMENTS COMBINED --------------- --------------- -------------- -------------- Sales $ 733,563 $ 90,347 -- $ 823,910 Cost of goods sold 677,886 83,531 -- 761,417 --------------- --------------- -------------- -------------- Gross profit 55,677 6,816 -- 62,493 Selling, general and administrative 30,298 2,960 -- 33,258 Asset write-offs 1,608 -- -- 1,608 --------------- --------------- -------------- -------------- Income from operations 23,771 3,856 -- 27,627 Interest expense (5,691) (852) -- (6,543) Other income 3,179 194 -- 3,373 --------------- --------------- -------------- -------------- Income before income taxes 21,259 3,198 -- 24,457 Income tax benefit (expense) (7,653) 8 (670)(g) (8,315) --------------- --------------- -------------- -------------- Net income $ 13,606 $ 3,206 $ (670) $ 16,142 =============== =============== ============== ============== Net income per share: Basic $ 0.63 $ 0.74 Diluted $ 0.60 $ 0.71 =============== ============== Shares used to compute net income per share: Basic 21,719 21,719 Diluted 22,585 22,585 =============== ============== </Table> 6 <Page> BENCHMARK ELECTRONICS, INC. NOTES TO UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL STATEMENTS The pro forma information related to the Acquisition has been prepared in accordance with Statement of Financial Accounting Standards (SFAS) No. 141, "Business Combinations," and SFAS 142, "Goodwill and Other Intangible Assets," which were adopted by Benchmark effective January 1, 2002. The Acquisition will be accounted for as a purchase. Accordingly, the cash paid for the acquisition and the direct acquisition costs incurred are recorded as the purchase price. The purchase price will be allocated to individual assets acquired and liabilities assumed based on their respective fair values. The excess purchase price over the fair value of the net assets are allocated to goodwill. The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the date of acquisition. The Company is in the process of obtaining third-party valuations of certain assets; thus, the allocation of the purchase price is subject to refinement. <Table> Calculation of purchase price: Cash $ 38,200 Acquisition costs 1,268 --------- Total purchase price $ 39,468 ========= Preliminary allocation of purchase price: Current assets $ 69,855 Property, plant and equipment 17,674 Other assets 28 Goodwill 8,645 --------- Total assets acquired $ 96,202 --------- Current liabilities 42,926 Long-term debt 13,808 --------- Total liabilities assumed 56,734 --------- Net assets acquired $ 39,468 ========= </Table> The following adjustments have been reflected in the Pro Forma Adjustments column of the audited pro forma combined condensed balance sheet and statement of operations: (a) Represents the cash consideration paid for ACT Thailand. (b) Represents adjustment to record inventory at "fair value." (c) Represents the allocation of the excess of total consideration over the net assets acquired to goodwill. (d) Represents the accrual of direct acquisition costs. (e) Represents the elimination of ACT Thailand's historical equity. (f) Represents the elimination of ACT Thailand's historical goodwill amortization expense. (g) Benchmark's estimated tax rate is 34%, after giving effect to the Acquisition. 7 <Page> S I G N A T U R E Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this amendment to be signed on its behalf by the undersigned hereunto duly authorized. Benchmark Electronics, Inc. Dated: October 11, 2002 By: /s/ Donald E. Nigbor ---------------------- Donald E. Nigbor Chief Executive Officer 8