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1 UNITED STATES ------------------------- SECURITIES AND EXCHANGE COMMISSION OMB APPROVAL Washington, D.C. 20549 ------------------------- OMB Number 3235-0145 Expires: October 31, 1994 Estimated average burden ------------------------- SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4) PROTEIN DESIGN LABS, INC. ----------------------------------------- (Name of Issuer) Common Stock, $0.01 Par Value ----------------------------------------- (Title of Class of Securities) 74369L-10-3 ----------------------------------------- (CUSIP Number) Check the following box if a fee is being paid with this statement / /. (A fee is not required only if the filing person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.) (See Rule 13d-7). *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). SEC 1745 (2/92) Page 1 of 4 pages 2 CUSIP NO. 74369L-10-3 SCHEDULE 13G PAGE 2 OF 4 PAGES --------------------- ----- ----- (1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON Laurence Jay Korn --------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (A) [ ] (B) [ X ] --------------------------------------------------------------------- (3) SEC USE ONLY --------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION United States --------------------------------------------------------------------- (5) SOLE VOTING POWER NUMBER OF 841,882* SHARES -------------------------------------------------------- BENEFICIALLY (6) SHARED VOTING POWER OWNED BY 0 EACH -------------------------------------------------------- REPORTING (7) SOLE DISPOSITIVE POWER PERSON WITH 841,882* -------------------------------------------------------- (8) SHARED DISPOSITIVE POWER 880,150* -------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 841,882 --------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES* [ X ] --------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 5.36% --------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON* IN --------------------------------------------------------------------- * See Item 4 SEE INSTRUCTIONS BEFORE FILLING OUT! PAGE 2 OF 4 PAGES ----- ----- 3 Page 3 of 4 Pages ----- ----- Item 1(a). Name of Issuer: Protein Design Labs, Inc. Item 1(b). Address of Issuer's Principal Executive Offices: 2375 Garcia Avenue Mountain View, CA 94043 Item 2(a) Name of Person Filing: Laurence Jay Korn Item 2(b) Address of Principal Business Office or, if none, Residence: Protein Design Labs 2375 Garcia Avenue Mountain View, CA 94043 Item 2(c) Citizenship: The filing person is a citizen of the United States of America Item 2(d) Title of Class of Securities: Common Stock, $.01 par value Item 2(e) CUSIP Number: 74369L-10-3 Item 3. Type of Person: Not Applicable Item 4. Ownership (at December 31, 1996): (a) Amount owned "beneficially" within the meaning of rule 13d-3: 841,882 shares; includes 181,250 shares which are subject to purchase within 60 days pursuant to the exercise of stock options. Does not include 12,067 shares held as the separate property of the spouse of the reporting person. Reporting person disclaims beneficial ownership of such 12,067 shares. See also Item 4(c). (b) Percent of Class: 5.36%, based on the total number of shares outstanding on December 31, 1996. (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: 841,882 shares (ii) shared power to vote or to direct the vote: None(1) (iii) sole power to dispose or to direct the disposition of: 841,882 shares (iv) shared power to dispose or to direct the disposition of: 880,150(1)(2) (1) 12,067 shares are held as the separate property of the spouse of the reporting person, and reporting person disclaims beneficial ownership of such shares. (2) Reporting person shares the power to dispose or to direct the disposition of 880,150 shares owned beneficially by Dr. Cary L. Queen, a separate reporting person. Reporting person disclaims beneficial ownership of the shares owned beneficially by Dr. Queen. Item 5. Ownership of Five Percent or Less of a Class: Not Applicable 4 Page 4 of 4 Pages ----- ----- 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 Security Being Reported on by the Parent Holding Company: Not Applicable Item 8. Identification and Classification of Members of the Group: See Item 4(c)(iv) Note (2). Item 9. Notice of Dissolution of Group: Not Applicable Item 10. Certification: Not Applicable 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: 2-12-97 /s/ LAURENCE JAY KORN ------- ---------------------