# EDGAR Filing Document

**Accession Number:** 0000353281
**File Stem:** 0000940400-25-000312
**Filing Date:** 2025-7
**Character Count:** 3347
**Document Hash:** 75ba27135562acab59dae207bcb702e5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-25-000312.hdr.sgml**: 20250725

**ACCESSION NUMBER**: 0000940400-25-000312

**CONFORMED SUBMISSION TYPE**: 24F-2NT

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250430

**FILED AS OF DATE**: 20250725

**DATE AS OF CHANGE**: 20250725

**EFFECTIVENESS DATE**: 20250725

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK FINANCIAL INSTITUTIONS SERIES TRUST
- **CENTRAL INDEX KEY:** 0000353281

**ORGANIZATION NAME:**
- **EIN:** 136797398
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0531

**FILING VALUES:**
- **FORM TYPE:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-78646
- **FILM NUMBER:** 251151570

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 800-441-7762

**MAIL ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FINANCIAL INSTITUTIONS SERIES TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### BlackRock Summit Cash Reserves Fund (Series ID: S000004031)

---

|  |  |
|:---|:---|
| Class Name    | Class ID   |
| Investor A    | C000011303 |
| Investor C    | C000199555 |
| Institutional | C000213594 |

---

## Series and Classes Contracts Data

### BlackRock Summit Cash Reserves Fund (Series ID: S000004031)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000011303 | Investor A    |  |
| C000199555 | Investor C    |  |
| C000213594 | Institutional |  |

## FORM 24F-2NT: Annual Notice of Securities Sold Pursuant to Rule 24f-2

### 24F-2NT: Filer Information

**Filer CIK:** 0000353281

**Is this a LIVE or TEST Filing?:** LIVE

**Filer Investment Company Type:** N-1A

### 24F-2NT: Annual Filing Information

**1. Name and address of issuer:**

- **Name of Issuer:** BLACKROCK FINANCIAL INSTITUTIONS SERIES TRUST

- **Address:** 100 Bellevue Parkway, Wilmington, DE 19809

**2. The Name and EDGAR Identifier of each series or class of securities for which this Form is filed:**

- [ ] Check box if the Form is being filed for all series and classes of the issuer.

**3. Investment Company Act File Number:** 811-03189

   **Securities Act File Number:** 002-78646

**4(a). Last day of fiscal year for which this Form is filed:** 04/30/2025

**4(b). Check box if this Form is being filed late:** [ ]

**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:** $1049618552.00

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $778354183.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $79037830.00

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $857392013.00

- **(v) Net sales:** $192226539.00

- **(vi) Redemption credits available for use in future years:** $0.00

- **(vii) Multiplier for determining registration fee:** 0.0001531

- **(viii) Registration fee due:** $29429.88

**Signatures**

**Name and Title:** Chuck Pulsfort, Assistant Treasurer

**Date:** 07/21/2025

**Signature:** /s/ Chuck Pulsfort