SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- SCHEDULE 13G (RULE 13D-102) INFORMATION STATEMENT PURSUANT TO RULE 13D-1 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4) BLACKROCK, INC. --------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 09247X101 --------- (CUSIP Number) December 31, 2003 ----------------- (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. 461915100 Page 1 of 9 Pages 1) Names of Reporting Persons IRS Identification No. Of Above Persons The PNC Financial Services Group, Inc. (formerly, PNC Bank Corp.) 25-1435979 2) Check the Appropriate Box if a Member of a Group (See Instructions) a) [ ] b) [ ] 3) SEC USE ONLY 4) Citizenship or Place of Organization Pennsylvania Number of Shares 5) Sole Voting Power 45,198,063 Beneficially Owned 6) Shared Voting Power -0- By Each Reporting 7) Sole Dispositive Power 44,937,800 Person With 8) Shared Dispositive Power 6,500 9) Aggregate Amount Beneficially Owned by Each Reporting Person 45,198,063* *See the response to Item 4. 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares See Instructions [ ] 11) Percent of Class Represented by Amount in Row (9) 70.42* *See the response to Item 4. 12) Type of Reporting Person (See Instructions) HC SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- SCHEDULE 13G (RULE 13D-102) INFORMATION STATEMENT PURSUANT TO RULE 13D-1 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4) BLACKROCK, INC. --------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 09247X101 --------- (CUSIP Number) December 31, 2003 ----------------- (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. 461915100 Page 2 of 9 Pages 1) Names of Reporting Persons IRS Identification No. Of Above Persons PNC Bancorp, Inc. 51-0326854 2) Check the Appropriate Box if a Member of a Group (See Instructions) a) [ ] b) [ ] 3) SEC USE ONLY 4) Citizenship or Place of Organization Delaware Number of Shares 5) Sole Voting Power 45,191,563 Beneficially Owned 6) Shared Voting Power -0- By Each Reporting 7) Sole Dispositive Power 44,937,800 Person With 8) Shared Dispositive Power -0- 9) Aggregate Amount Beneficially Owned by Each Reporting Person 45,191,563* *See the response to Item 4. 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares See Instructions [ ] 11) Percent of Class Represented by Amount in Row (9) 70.41* *See the response to Item 4. 12) Type of Reporting Person (See Instructions) HC SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- SCHEDULE 13G (RULE 13D-102) INFORMATION STATEMENT PURSUANT TO RULE 13D-1 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4) BLACKROCK, INC. --------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 09247X101 --------- (CUSIP Number) December 31, 2003 ----------------- (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. 461915100 Page 3 of 9 Pages 1) Names of Reporting Persons IRS Identification No. Of Above Persons PNC Bank, National Association 22-1146430 2) Check the Appropriate Box if a Member of a Group (See Instructions) a) [ ] b) [ ] 3) SEC USE ONLY 4) Citizenship or Place of Organization United States Number of Shares 5) Sole Voting Power 45,191,563 Beneficially Owned 6) Shared Voting Power -0- By Each Reporting 7) Sole Dispositive Power 44,937,800 Person With 8) Shared Dispositive Power -0- 9) Aggregate Amount Beneficially Owned by Each Reporting Person 45,191,563* *See the response to Item 4. 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares See Instructions [ ] 11) Percent of Class Represented by Amount in Row (9) 70.41* *See the response to Item 4. 12) Type of Reporting Person (See Instructions) BK SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- SCHEDULE 13G (RULE 13D-102) INFORMATION STATEMENT PURSUANT TO RULE 13D-1 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4) BLACKROCK, INC. --------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 09247X101 --------- (CUSIP Number) December 31, 2003 ----------------- (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. 461915100 Page 4 of 9 Pages 1) Names of Reporting Persons IRS Identification No. Of Above Persons PNC Asset Management, Inc. 51-0380821 2) Check the Appropriate Box if a Member of a Group (See Instructions) a) [ ] b) [ ] 3) SEC USE ONLY 4) Citizenship or Place of Organization Delaware Number of Shares 5) Sole Voting Power 44,935,000 Beneficially Owned 6) Shared Voting Power -0- By Each Reporting 7) Sole Dispositive Power 44,935,000 Person With 8) Shared Dispositive Power -0- 9) Aggregate Amount Beneficially Owned by Each Reporting Person 44,935,000* *See the response to Item 4. 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares See Instructions [ ] 11) Percent of Class Represented by Amount in Row (9) 70.02* *See the response to Item 4. 12) Type of Reporting Person (See Instructions) HC SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ---------- SCHEDULE 13G (RULE 13D-102) INFORMATION STATEMENT PURSUANT TO RULE 13D-1 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 4) BLACKROCK, INC. --------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 09247X101 --------- (CUSIP Number) December 31, 2003 ----------------- (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. 225646108 Page 5 of 9 Pages 1) Names of Reporting Persons IRS Identification No. Of Above Persons J.J.B. Hilliard, W.L. Lyons, Inc. 61-0734935 2) Check the Appropriate Box if a Member of a Group (See Instructions) a) [ ] b) [ ] 3) SEC USE ONLY 4) Citizenship or Place of Organization Kentucky Number of Shares 5) Sole Voting Power 6,500 Beneficially Owned 6) Shared Voting Power -0- By Each Reporting 7) Sole Dispositive Power -0- Person With 8) Shared Dispositive Power 6,500 9) Aggregate Amount Beneficially Owned by Each Reporting Person 6,500* *See the response to Item 4. 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares See Instructions [ ] 11) Percent of Class Represented by Amount in Row (9) Less than 0.01* *See the response to Item 4. 12) Type of Reporting Person (See Instructions) IA Page 6 of 9 Pages ITEM 2(a) - NAME OF PERSON FILING: The PNC Financial Services Group, Inc.; PNC Bancorp, Inc.; PNC Bank, National Association; PNC Asset Management, Inc.; and J.J.B. Hilliard, W.L. Lyons, Inc. ITEM 2(b) - ADDRESS OF PRINCIPAL BUSINESS OFFICE: The PNC Financial Services Group, Inc. - One PNC Plaza, 249 Fifth Avenue, Pittsburgh, PA 15222-2707 PNC Bancorp, Inc. - 300 Delaware Avenue, Suite 304, Wilmington, DE 19801 PNC Bank, National Association - One PNC Plaza, 249 Fifth Avenue, Pittsburgh, PA 15222-2707 PNC Asset Management, Inc. - 300 Delaware Avenue, Suite 304, Wilmington, DE 19801 J.J.B. Hilliard, W.L. Lyons, Inc. - 501 South 4th Avenue, Louisville, KY 40202-2517 ITEM 2(c) - CITIZENSHIP: The PNC Financial Services Group, Inc. - Pennsylvania PNC Bancorp, Inc. - Delaware PNC Bank, National Association - United States PNC Asset Management, Inc. - Delaware J.J.B. Hilliard, W.L. Lyons, Inc. - Kentucky ITEM 3 - IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b), CHECK WHETHER THE PERSON FILING IS A: (a) [ ] Broker or dealer registered under Section 15 of the Exchange Act; (b) [X] Bank as defined in Section 3(a)(6) of the Exchange Act; (c) [ ] Insurance Company as defined in Section 3(a)(19) of the Exchange Act; (d) [ ] Investment Company registered under Section 8 of the Investment Company Act; (e) [X] An Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) [ ] An Employee Benefit Plan or Endowment Fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) [X] A Parent Holding Company or Control Person in accordance with Rule 13d-1(b)(1)(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; (j) [ ] Group, in accordance with Rule 13d(b)(1)(ii)(J). If this statement is filed pursuant to Rule 13d-1(c), check this box. [ ] ITEM 4 - OWNERSHIP: The following information is as of December 31, 2003: