SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 SCHEDULE 13G Amendment No. 4 Under the Securities Exchange Act of 1934 Merge Technologies Incorporated (Name of Issuer) Common Stock, Par Value $0.01 per share (Title of Class of Securities) 589981 10 9 (CUSIP Number) March 16, 2004 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [ ] Rule 13d-1(c) [ X ] Rule 13d-1(d) CUSIP NO.: 589981 10 9 -------------------------------------------------------------------------------- 1. Name(s) of Reporting Persons Social Security or Internal Revenue Service Identification Nos. of Above Persons William C. Mortimore -------------------------------------------------------------------------------- 2. Check the Appropriate Box if a Member of a Group (a) Not Applicable (b) [ ] -------------------------------------------------------------------------------- 3. SEC Use Only -------------------------------------------------------------------------------- 4. Citizenship or Place of Organization U. S. A. -------------------------------------------------------------------------------- Number of 5) Sole Voting Power 227,128* Shares -------------------------------------------------------- Beneficially 6) Shared Voting Power 0 Owned -------------------------------------------------------- by Each 7) Sole Dispositive Power 227,128* Reporting -------------------------------------------------------- Person With 8) Shared Dispositive Power 0 -------------------------------------------------------------------------------- 9. Aggregate Amount Beneficially Owned by Each Reporting Person 227,128* -------------------------------------------------------------------------------- 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ] -------------------------------------------------------------------------------- 11. Percent of Class Represented by Amount in Row (9) 2.19% -------------------------------------------------------------------------------- 12. Type of Reporting Person IN -------------------------------------------------------------------------------- * Includes vested options issued to purchase 106,709 shares of Common Stock. ITEM 1(a) NAME OF ISSUER: Merge Technologies Incorporated ITEM 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 1126 South 70th Street Suite S 107 B Milwaukee, Wisconsin 53214-3151 ITEM 2(a) NAME OF PERSON FILING: William C. Mortimore ITEM 2(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 1126 South 70th Street Suite S107B Milwaukee, Wisconsin 53214-3151 ITEM 2(c) CITIZENSHIP: U. S. A. ITEM 2(d) TITLE OF CLASS OF SECURITIES: Common Stock, Par Value $0.01 per share ITEM 2(e) CUSIP NUMBER: 589981 10 9 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b), CHECK WHETHER THE PERSON FILING IS A: (a) [ ] Broker or dealer registered under section 15 of the Act (b) [ ] Bank as defined in section 3(a)(6) of the Act (c) [ ] Insurance company as defined in section 3(a)(19) of the Act (d) [ ] Investment company registered under section 8 of the Investment Company Act (e) [ ] An investment adviser registered under section 203 of the Investment Advisers Act of 1940 (f) [ ] An employee benefit plan or endowment fund in accordance with section 240.13d-1(b(1)(ii)(F) (g) [ ] A parent holding company, in accordance with section 240.13d-1(b)(ii)(G) (h) [ ] A savings association as defined in section 3(b) of the Federal Deposit Insurance Act (i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (j) [ ] Group, in accordance with section 240.13d-1(b) (1)(ii)(J) ITEM 4. OWNERSHIP (a) Amount Beneficially Owned: 227,128* (b) Percent of Class: 2.19% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote 227,128* (ii) shared power to vote or to direct the vote 0 (iii) sole power to dispose or to direct the disposition of 227,128* (iv) shared power to dispose or to direct the disposition of 0 * Includes vested options issued to purchase 106,709 shares of Common Stock. ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ X ]. ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON Not applicable ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SsECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY Not applicable ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not applicable ITEM 9. NOTICE OF DISSOLUTION OF GROUP Not applicable Item 10. CERTIFICATION SIGNATURE ----------- After reasonable 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. Date: March 16, 2004 Signature: /s/ William C. Mortimore ------------------------------ William C. Mortimore