# EDGAR Filing Document

**Accession Number:** 0000842790
**File Stem:** 0000842790-25-000044
**Filing Date:** 2025-10
**Character Count:** 14221
**Document Hash:** 485db80f6dcc084128482421d8322346
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000842790-25-000044.hdr.sgml**: 20251030

**ACCESSION NUMBER**: 0000842790-25-000044

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250831

**FILED AS OF DATE**: 20251030

**DATE AS OF CHANGE**: 20251030

**PERIOD START**: 20260228

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS (INVESCO INVESTMENT SECURITIES FUNDS)
- **CENTRAL INDEX KEY:** 0000842790

**ORGANIZATION NAME:**
- **EIN:** 760343427
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0228

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-05686
- **FILM NUMBER:** 251435127

**BUSINESS ADDRESS:**
- **STREET 1:** 11 GREENWAY PLAZA
- **STREET 2:** SUITE 1000
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046
- **BUSINESS PHONE:** 7136261919

**MAIL ADDRESS:**
- **STREET 1:** 11 GREENWAY PLAZA
- **STREET 2:** SUITE 1000
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77046

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS
- **DATE OF NAME CHANGE:** 20000921

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM INVESTMENT SECURITIES FUNDS INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIM PRIME RATE PREMIUM INCOME FUND INC
- **DATE OF NAME CHANGE:** 19910320

## Series and Classes Contracts Data

### INVESCO Short Duration Inflation Protected Fund (Series ID: S000000252)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000000606 | Class A2     | SHTIX           |
| C000000607 | Class A      | LMTAX           |
| C000023119 | CLASS R5     | ALMIX           |
| C000071213 | Class Y      | LMTYX           |
| C000164285 | Class R6     |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** AIM Investment Securities Funds (Invesco Investment Securities Funds)

- **b. Investment Company Act file number:** 811-05686

- **c. CIK number of Registrant:** 0000842790

- **d. LEI of Registrant:** G61U5I6LJJEX0O3SU057

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 11 Greenway Plaza

  - **City:** Houston

  - **State:** TX

  - **Foreign country:** US

  - **Zip / Postal Code:** 77046-1173

  - **Telephone number:** 800-959-4246

**Item A.2. Information about the Series.**

- **a. Name of Series:** Invesco Short Duration Inflation Protected Fund

- **b. EDGAR series identifier (if any):** S000000252

- **c. LEI of Series:** 549300V8T0KQ1PWXMT14

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-02-28

- **b. Date as of which information is reported:** 2025-08-31

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $399193617.54

**Total Liabilities:** $191269.24

**Net Assets:** $399002348.30

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000000606 | 0.54%                | 0.20%                | 1.48%                |
| Class ID C000023119 | 0.57%                | 0.20%                | 1.48%                |
| Class ID C000164285 | 0.57%                | 0.30%                | 1.48%                |
| Class ID C000000607 | 0.61%                | 0.20%                | 1.48%                |
| Class ID C000071213 | 0.57%                | 0.30%                | 1.48%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-18873.02               | $600617.81                                 |
| Month 2  | $-121581.24              | $21614.44                                  |
| Month 3  | $-749.52                 | $4093017.33                                |

### Schedule of Portfolio Investments

| Name                                    | Title                                                      | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 912810PS1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  11369086 | PA      | $11601766.25  | 2.91%             | 2027-01-15      | Fixed         | 2.38%                 | No            |                  2 | On Loan: No      |
| Invesco Treasury Portfolio              | Invesco Treasury Portfolio, Institutional Class            | CUSIP: 825252406<br>LEI: 5493004B3TM8ZIDDDC39 | Long             | STIV             | RF                | US        |    441202 | NS      | $441202.46    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CEJ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19487067 | PA      | $19233880.55  | 4.82%             | 2027-04-15      | Fixed         | 0.12%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 912828Y38<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  20338751 | PA      | $20335958.67  | 5.10%             | 2028-07-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CJH5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19193270 | PA      | $20108648.41  | 5.04%             | 2028-10-15      | Fixed         | 2.38%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CLV1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  20650466 | PA      | $21187961.56  | 5.31%             | 2029-10-15      | Fixed         | 1.62%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 9128287D6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  21730636 | PA      | $21186682.46  | 5.31%             | 2029-07-15      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 9128285W6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19911247 | PA      | $19866014.58  | 4.98%             | 2029-01-15      | Fixed         | 0.88%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 912810FH6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  16428642 | PA      | $18092182.09  | 4.53%             | 2029-04-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 912828ZZ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  23307741 | PA      | $22274569.49  | 5.58%             | 2030-07-15      | Fixed         | 0.12%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 9128283R9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  21932937 | PA      | $21745553.42  | 5.45%             | 2028-01-15      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 912810FD5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  14398399 | PA      | $15406453.86  | 3.86%             | 2028-04-15      | Fixed         | 3.62%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 912828Z37<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  22240264 | PA      | $21341767.99  | 5.35%             | 2030-01-15      | Fixed         | 0.12%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 912828V49<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  22132478 | PA      | $21986841.62  | 5.51%             | 2027-01-15      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CGW5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  18686365 | PA      | $18841310.85  | 4.72%             | 2028-04-15      | Fixed         | 1.25%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CFR7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  18850964 | PA      | $19224414.19  | 4.82%             | 2027-10-15      | Fixed         | 1.62%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 91282CNB3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  22795638 | PA      | $23288384.78  | 5.84%             | 2030-04-15      | Fixed         | 1.62%                 | No            |                  2 | On Loan: No      |
| Invesco Government & Agency Portfolio   | Invesco Government & Agency Portfolio, Institutional Class | CUSIP: 825252885<br>LEI: 5493007T1J7WZ5QI1A47 | Long             | STIV             | RF                | US        |    237571 | NS      | $237570.55    | 0.06%             |  |  |  | No            |                  1 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CDC2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19546122 | PA      | $19439327.55  | 4.87%             | 2026-10-15      | Fixed         | 0.12%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 9128282L3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  21022109 | PA      | $20923149.77  | 5.24%             | 2027-07-15      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 912810PV4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  10373199 | PA      | $10586222.48  | 2.65%             | 2028-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Bonds | U.S. Treasury Inflation - Indexed Bonds                    | CUSIP: 912810PZ5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   9281767 | PA      | $9758072.36   | 2.45%             | 2029-01-15      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| U.S. Treasury Inflation - Indexed Notes | U.S. Treasury Inflation - Indexed Notes                    | CUSIP: 91282CKL4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  19779754 | PA      | $20547172.57  | 5.15%             | 2029-04-15      | Fixed         | 2.12%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-09-30

**Name of Applicant:** AIM Investment Securities Funds (Invesco Investment Securities Funds)

**Signature:** Adrien Deberghes

**Name of Signer:** Adrien Deberghes

**Title:** Principal Financial Officer and Treasurer