U.S. SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 24F-2
Annual Notice of Securities Sold
Pursuant to Rule 24f-2
Read Instructions at end of Form before preparing Form.
1. Name and address of issuer:
MainStay Institutional Funds, Inc.
51 Madison Avenue
New York, NY 10010
2. The name of each series of class of securities for which this Form is
filed (If the Form is being filed for all series and classes of
securities of the issuer, check the box but do not list series or
classes): X
3. Investment Company Act File Number: 811-6175
Securities Act File Number: 33-36962
4(a). Last day of fiscal year for which this Form is filed:
10/31/99
4(b).___Check box if this Form is being filed late (i.e., more than 90
calendar days after the end of the issuer's fiscal year). (See Instruction A.2)
Note: If the Form is being filed late, interest must be paid on the
registration fee due.
4(c).___Check box if this is the last time the issuer will be filing this Form.
5. Calculation of registration fee:
(i) Aggregate sale price of securities sold during the fiscal year pursuant
to Section 24(f): $1,560,232,603
(ii) Aggregate price of securities redeemed or repurchased during the
fiscal year: $1,518,635,951
(iii) Aggregate price of securities redeemed or repurchased during any
prior fiscal year ending no earlier than October 11, 1995 that were not
previously used to reduce registration fees payable to the Commission: $0
(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:
$1,518,635,951
(v) Net sales-If Item 5(i) is greater than Item 5(iv) [subtract Item 5(iv)
from Item 5(i)]: $41,596,652
(vi) Redemption credits available for use in future years if Item 5(i) is
less than Item 5(iv) [subtract Item 5(iv) from Item 5(i)]: $(_______________)
(vii) Multiplier for determining registration fee (See Instruction C.9): x
.000264
(viii) Registration fee due [multiply Item 5(v) by Item 5(vii)] (enter "0"
for no fee is due): $10,981.52
6. Prepaid Shares
If the response to Item 5(i) was determined by deducting an amount of
securities that were registered under the Securities Act of 1933 pursuant to
rule 24e-2 as in effect before October 11, 1997, then report the amount of
securities (number of shares or other units) deducted here: _____________ If
there is a number of shares or other units that were registered pursuant to rule
24e-2 remaining unsold at the end of the fiscal year for which this form is
filed that are available for use by the issuer in future fiscal years, then
state that number here:____________
7. Interest due -- if this Form is being filed more than 90 days after the
end of the issuer's fiscal year (see Instruction D): $______________
8. Total of the amount of the registration fee due plus any interest due
(line 5(viii) plus line 7): $10,981.52
9. Date the registration fee and any interest payment was sent to the
Commission's lockbox depository:
Method of Delivery: X Wire Transfer Mail or
other means
SIGNATURES
This report has been signed below by the following persons on behalf of the
issuer and in the capacities and on the date indicated.
By (Signature and Title):
/s/ John A. Flanagan, Treasurer
Date: January 24, 2000 John A. Flanagan, Treasurer
