Form: SC 13G

Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

February 14, 2000

SC 13G: Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

Published on February 14, 2000


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

BLACKROCK, INC.
---------------
(Name of Issuer)

Common Stock
------------
(Title of Class of Securities)

09247X101
---------
(CUSIP Number)

December 31, 1999
-----------------
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No. 461915100 Page 1 of 8 Pages

1) Names of Reporting Persons
IRS Identification No. Of Above Persons

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 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

10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares
See Instructions [ ]

11) Percent of Class Represented by Amount in Row (9) 81.9

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

BLACKROCK, INC.
---------------
(Name of Issuer)

Common Stock
------------
(Title of Class of Securities)

09247X101
---------
(CUSIP Number)

December 31, 1999
-----------------
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No. 461915100 Page 2 of 8 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 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

10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares
See Instructions [ ]

11) Percent of Class Represented by Amount in Row (9) 81.9

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

BLACKROCK, INC.
---------------
(Name of Issuer)

Common Stock
------------
(Title of Class of Securities)

09247X101
---------
(CUSIP Number)

December 31, 1999
-----------------
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No. 461915100 Page 3 of 8 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 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

10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares
See Instructions [ ]

11) Percent of Class Represented by Amount in Row (9) 81.9

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

BLACKROCK, INC.
---------------
(Name of Issuer)

Common Stock
------------
(Title of Class of Securities)

09247X101
---------
(CUSIP Number)

December 31, 1999
-----------------
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

CUSIP No. 461915100 Page 4 of 8 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

10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares
See Instructions [ ]

11) Percent of Class Represented by Amount in Row (9) 81.9

12) Type of Reporting Person (See Instructions) HC






Page 5 of 8 Pages

ITEM 1(a) - NAME OF ISSUER:

BlackRock, Inc.

ITEM 1(b) - ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

345 Park Avenue
New York, NY 10154

ITEM 2(a) - NAME OF PERSON FILING:

PNC Bank Corp.; PNC Bancorp, Inc.; PNC Bank, National Association;
and PNC Asset Management, Inc.

ITEM 2(b) - ADDRESS OF PRINCIPAL BUSINESS OFFICE:

PNC Bank Corp. - One PNC Plaza, 249 Fifth Avenue,
Pittsburgh, PA 15222-2707
PNC Bancorp, Inc. - 222 Delaware Avenue, Wilmington, DE 19899
PNC Bank, National Association - One PNC Plaza, 249 Fifth Avenue,
Pittsburgh, PA 15222-2707
PNC Asset Management, Inc. - 222 Delaware Avenue, Wilmington, DE 19899

ITEM 2(c) - CITIZENSHIP:

PNC Bank Corp. - Pennsylvania
PNC Bancorp, Inc. - Delaware
PNC Bank, National Association - United States
PNC Asset Management, Inc. - Delaware

ITEM 2(d) - TITLE OF CLASS OF SECURITIES:

Common

ITEM 2(e) - CUSIP NUMBER:

09247X101

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) [ ] 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. [ ]





Page 6 of 8 Pages
ITEM 4 - OWNERSHIP:

The following information is as of December 31, 1999:

(a) Amount Beneficially Owned: 44,935,000 shares

(b) Percent of Class: 81.9

(c) Number of shares to which such person has:
(i) sole power to vote or to direct the vote 44,935,000
(ii) shared power to vote or to direct the vote -0-
(iii) sole power to dispose or to direct the disposition of 44,935,000
(iv) shared power to dispose or to direct the disposition of -0-


ITEM 5 - OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

Not Applicable.


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:

Included are the following subsidiaries of PNC Bank Corp. - HC:

PNC Bancorp, Inc. - HC (wholly owned subsidiary of PNC Bank Corp.)

PNC Bank, National Association - BK (wholly owned subsidiary of PNC Bancorp,
Inc.)

PNC Asset Management, Inc. - HC (indirectly owned subsidiary of PNC Bank,
National Association)


ITEM 8 - IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

Not Applicable.


ITEM 9 - NOTICE OF DISSOLUTION OF GROUP:

Not Applicable.


ITEM 10 - CERTIFICATION:

By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and held in the ordinary
course of business and were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.






Page 7 of 8 Pages

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.


February 14, 2000
Date

By: /s/ Robert L. Haunschild
- -----------------------------
Signature - PNC Bank Corp.
Robert L. Haunschild, Senior Vice President and Chief Financial Officer
Name & Title


February 14, 2000
Date

By: /s/ James B. Yahner
- -----------------------------
Signature - PNC Bancorp, Inc.
James B. Yahner, Vice President
Name & Title


February 14, 2000
Date

By: /s/ Thomas R. Moore
- -----------------------------
Signature - PNC Bank, National Association
Thomas R. Moore, Vice President and Secretary
Name & Title


February 14, 2000
Date

By: /s/ Robert L. Haunschild
- -----------------------------
Signature - PNC Asset Management, Inc.
Robert L. Haunschild, President
Name & Title









Page 8 of 8 Pages


EXHIBIT A

AGREEMENT

February 14, 2000

The undersigned hereby agree to file a joint statement on Schedule 13G
under the Securities and Exchange Act of 1934, as amended (the "Act") in
connection with their beneficial ownership of common stock issued by Investors
Financial Services Corp.

Each of the undersigned states that it is entitled to individually use
Schedule 13G pursuant to Rule 13d-1(c) of the Act.

Each of the undersigned is responsible for the timely filing of the
statement and any amendments thereto, and for the completeness and accuracy of
the information concerning each of them contained therein but none is
responsible for the completeness or accuracy of the information concerning the
others.

This Agreement applies to any amendments to Schedule 13G.

PNC BANK CORP.


BY: /s/ Robert L. Haunschild
-------------------------------
Robert L. Haunschild, Senior
Vice President & Chief
Financial Officer


PNC BANCORP, INC.


BY: /s/ James B. Yahner
-------------------------------
James B. Yahner, Vice President


PNC BANK, NATIONAL ASSOCIATION


BY: /s/ Thomas R. Moore
-------------------------------
Thomas R. Moore, Vice President
& Secretary


PNC ASSET MANAGEMENT, INC.


BY: /s/ Robert L. Haunschild
-------------------------------
Robert L. Haunschild,
President