SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 ) ------ Redwood Trust, Inc. ---------------------------------- (Name of Issuer) Common ---------------------------------- (Title of Class of Securities) Common-758075402 ---------------------------------- (CUSIP Number) - ------------------------------------------------------------------------------- (1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above Persons Wallace R. Weitz & Company 47-0654095 - ------------------------------------------------------------------------------- (2) Check the Appropriate Box if a Member (a) / / of a Group (b) /X/ - ------------------------------------------------------------------------------- (3) SEC Use Only - ------------------------------------------------------------------------------- (4) Citizenship or Place of Organization State of Nebraska - ------------------------------------------------------------------------------- Number of Shares (5) Sole Voting Beneficially Power 1,951,119 Owned by -------------------------------------------------- Each Reporting (6) Shared Voting Person With Power None -------------------------------------------------- (7) Sole Dispositive Power 1,951,119 -------------------------------------------------- (8) Shared Dispositive Power None - ------------------------------------------------------------------------------- (9) Aggregate Amount Beneficially Owned by Each Reporting Person 1,951,119 - ------------------------------------------------------------------------------- (10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares - ------------------------------------------------------------------------------- (11) Percent of Class Represented by Amount in Row (9) 13.65% - ------------------------------------------------------------------------------- (12) Type of Reporting Person IA - ------------------------------------------------------------------------------- Schedule 13G Page 2 ITEM 1(A). NAME OF ISSUER Redwood Trust, Inc. - ------------------------------------------------------------------------------- ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES 591 Redwood Highway, Suite 3100 Mill Valley, California 94941 - ------------------------------------------------------------------------------- ITEM 2(A). NAME OF PERSON(S) FILING Wallace R. Weitz & Company - ------------------------------------------------------------------------------- ITEM 2(B). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE 1125 South 103rd Street, Suite 600 Omaha, Nebraska 68124-6008 - ------------------------------------------------------------------------------- ITEM 2(C). CITIZENSHIP State of Nebraska - ------------------------------------------------------------------------------- ITEM 2(D). TITLE OF CLASS OF SECURITIES Common - ------------------------------------------------------------------------------- ITEM 2(E). CUSIP NUMBER Common-758075402 - ------------------------------------------------------------------------------- ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(B), OR 13D-2(B), CHECK WHETHER THE PERSON FILING IS A /X/ Investment Adviser registered under section 203 of the Investment Advisers Act of 1940 ITEM 4. OWNERSHIP (a) Amount Beneficially Owned: 1,951,119 --------------------------------------------------------------------------- (b) Percent of Class: 13.65% --------------------------------------------------------------------------- (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote 1,951,119 ----------------------------------------------------------------- (ii) shared power to vote or to direct the vote None ----------------------------------------------------------------- (iii) sole power to dispose or to direct the disposition of 1,951,119 ----------------------------------------------------------------- (iv) shared power to dispose or to direct the disposition of None ----------------------------------------------------------------- ITEM 10. CERTIFICATION By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect. 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. 2/11/98 ---------------------------------------- (Date) /s/ Wallace R. Weitz ---------------------------------------- (Signature) Wallace R. Weitz, President ---------------------------------------- (Name/Title)