# EDGAR Filing Document

**Accession Number:** 0001847309
**File Stem:** 0001193125-26-259188
**Filing Date:** 2026-6
**Character Count:** 160640
**Document Hash:** f3abee27825924f5fb2eedc0830ce5d8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-259188.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0001193125-26-259188

**CONFORMED SUBMISSION TYPE**: N-CSRS

**PUBLIC DOCUMENT COUNT**: 5

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260605

**DATE AS OF CHANGE**: 20260605

**EFFECTIVENESS DATE**: 20260605

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.
- **CENTRAL INDEX KEY:** 0001847309

**ORGANIZATION NAME:**
- **EIN:** 660647718
- **STATE OF INCORPORATION:** PR
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** N-CSRS
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-23684
- **FILM NUMBER:** 261068453

**BUSINESS ADDRESS:**
- **STREET 1:** 250 MUNOZ RIVERA
- **STREET 2:** TENTH FLOOR
- **CITY:** SAN JUAN
- **STATE:** PR
- **ZIP:** 00918
- **BUSINESS PHONE:** 787-250-3600

**MAIL ADDRESS:**
- **STREET 1:** 250 MUNOZ RIVERA
- **STREET 2:** TENTH FLOOR
- **CITY:** SAN JUAN
- **STATE:** PR
- **ZIP:** 00918

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Puerto Rico Mortgage-Backed & U.S. Government Securities Fund, Inc.
- **DATE OF NAME CHANGE:** 20210222

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number: 811-23684

U.S. MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Exact name of Registrant as specified in charter) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

American International Plaza Building - Tenth Floor

250 Muñoz Rivera Avenue

San Juan, Puerto Rico 00918

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Address of principal executive offices) (Zip code) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

Liana Loyola

Secretary

American International Plaza Building - Tenth Floor

250 Muñoz Rivera Avenue

San Juan, Puerto Rico 00918

(Name and Address of Agent for Service)

Copies to:

Carla G. Teodoro Sidley Austin LLP 787 Seventh Avenue New York, NY 10019 Owen Meacham UBS Business Solutions US LLC One North Wacker Drive Chicago, IL 60606

Registrant's telephone number, including area code: (787) 250-3600

Date of fiscal year end: September 30

Date of reporting period: October 1, 2025 – March 31, 2026

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**Item 1. Report to Shareholders.** 

(a) The following is a copy of the report transmitted to shareholders pursuant to Rule 30e-1 under the Investment Company Act of 1940, as amended (the "1940 Act").

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---

| |
|:---|
| ![LOGO](g160595g03g03.jpg) |
| **SEMI-ANNUAL REPORT**<br> **March 31, 2026** |

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**US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.** 

**Table of Contents** 

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| | |
|:---|:---|
|  **[Letter to Shareholders](#tx160595_1)** | **1** |
|  **[Management Discussion of Fund Performance](#tx160595_2)** | **3** |
|  **[Fund Leverage](#tx160595_3)** | **7** |
|  **[Financial Highlights](#tx160595_4)** | **9** |
|  **[Schedule of Investments](#tx160595_5)** | **10** |
|  **[Financial Statements](#tx160595_6)** |  |
| &nbsp;&nbsp;&nbsp;&nbsp; [Statement of Assets and Liabilities](#tx160595_7) | 12 |
| &nbsp;&nbsp;&nbsp;&nbsp; [Statement of Operations](#tx160595_8) | 13 |
| &nbsp;&nbsp;&nbsp;&nbsp; [Statements of Changes in Net Assets](#tx160595_9) | 14 |
| &nbsp;&nbsp;&nbsp;&nbsp; [Statement of Cash Flow](#tx160595_10) | 15 |
|  **[Notes to Financial Statements](#tx160595_11)** | **16** |
|  **[Other Information (Unaudited)](#tx160595_12)** | **34** |
|  **[Privacy Notice](#tx160595_13)** | **37** |

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[THIS PAGE INTENTIONALLYL LEFT BLANK]

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## LETTER TO SHAREHOLDERS
April 30, 2026

Dear Shareholders:

US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc. (the "Fund") is pleased to present this Letter to Shareholders for the period from October 1, 2025, to March 31, 2026.

The Federal Reserve Board (the "Fed") lowered interest rates a total of 0.75% during the last three meetings of calendar year 2025. It then left rates unchanged during the first two meetings of calendar 2026. In a statement following the March 2026 meeting, the Fed used the word "uncertainty" twice, once to describe "the economic outlook" and a second time to describe "the implications for developments in the Middle East for the U.S. economy". The federal funds rate closed the Fund's fiscal period at 3.50% - 3.75%.

On February 20, 2026, the Supreme Court ruled that the tariffs imposed by the Trump Administration beginning in April 2025, were illegal. The President reacted by imposing a new 15% tariff using a different law. The impact of this ruling and the renewed efforts by the administration to continue to implement its tariff policy add uncertainty about the policy's impact on the economy.

On February 28, 2026, the United States and Israel launched a military strike against Iran called "Operation Epic Fury". Iran countered by attacking U.S. targets in neighboring Arab countries and closing the flow of oil through the Strait of Hormuz. The price of oil spiked above $100 a barrel, and the ten year-note increased from the yield lows that prevailed during February 2026.

Yields increased across the yield curve during the period and the yield curve flattened slightly by 0.02%, from 0.54% to 0.52%. The yield of the 2-year note increased 0.19% during the period while the yield of the 10-year note increased 0.17%. The closing yields of the 2-year note and the 10-year note on March 31, 2026, were 3.80% and 4.32%, respectively.

On April 7, 2026, the U.S. and Iran agreed to a two week cease fire, including the opening of shipping through the Strait of Hormuz. The markets reacted positively to the news, the price of oil dropped below $100, and the yield of the 10-year note remained at 4.32%. Subsequently, the U.S. imposed a blockade of the straight which remains in effect. As of April 30, 2026, there has been no agreement, and the cease fire has been extended.

The markets are trading on daily updates of the status of ongoing negotiations between the U.S. and Iran. Volatility is high. Optimism about a settlement prevailed

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during the days following the blockade. On April 30, 2026, the price of oil remained above $100, and the yield of the 10-year note increased to 4.39%. The S&P 500 index, on the other hand, closed at a record high above 7,000. There is considerable uncertainty about the ultimate resolution of the conflict.

The Federal Reserve left the federal funds rate unchanged at its April 29 meeting. This should be Jerome Powells last meeting as Chairman. During a press conference after the meeting he announced he will remain on the Board after the new Chairman takes over in May 2026. There is uncertainty about the future of Fed policy driven by a combination of the change in leadership and the impact of the Iran conflict.

Uncertainty over the timing of Fed policy, the revised implementation of tariffs, the shape of the yield curve, and the resolution of the conflict in the Middle East continue to present a challenging environment for the management of the Fund. Notwithstanding, the investment adviser remains committed to seeking investment opportunities within allowed parameters while providing professional management services to the Fund for the benefit of its shareholders.

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| |
|:---|
| Sincerely, |
| <u>/s/ Carlos V. Ubiñas</u> |
| Carlos V. Ubiñas |

---

President and Chairman of the Board of Directors

*This letter is intended to assist shareholders in understanding how the Fund performed during the period ended March 31, 2026. The views and opinions in the letter were current as of April 30, 2026. They are not guarantees of future performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors, and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.* 

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## MANAGEMENT DISCUSSION OF FUND PERFORMANCE
**REGISTRATION UNDER THE INVESTMENT COMPANY ACT OF 1940** 

The Fund is a corporation organized under the laws of the Commonwealth of Puerto Rico ("Puerto Rico") and is registered as a closed-end investment company under the Investment Company Act of 1940, as amended (the "1940 Act"), as of May 14, 2021. Prior thereto, the Fund was registered under the Puerto Rico Investment Companies Act of 1954, as amended.

On May 24, 2018, the Economic Growth, Regulatory Relief, and Consumer Protection Act (Pub. L. No. 115-174) was signed into law and amended the 1940 Act to repeal the exemption from its registration of investment companies created under the laws of Puerto Rico, the U.S. Virgin Islands, or any other U.S. possession under Section 6(a)(1) thereof. The repeal of the exemption took effect on May 24, 2021. Upon registration under the 1940 Act, the Fund must now register its future offerings of securities under the Securities Act of 1933, as amended (the "1933 Act"), absent an available exception. There is limited trading in Fund shares, which are not registered under the 1933 Act, and are only traded via private transactions. The Fund has suspended the issuance of Tax-Exempt Secured Obligations ("TSOs") pending registration under the 1933 Act.

**FUND PERFORMANCE** 

The following table shows the Fund's performance for the period from October 1, 2025, to March 31, 2026:

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| | |
|:---|:---|
|  | **Six-Month Period** |
|  Based on net asset value | 1.19% |

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**Past performance is not predictive of future results.** Performance calculations do not reflect any deduction of taxes that a shareholder may have to pay on Fund distributions or any commissions payable on the sale of Fund shares.

The following table provides summary data on the Fund's dividends for the period-end based on NAV and market price as of March 31, 2026:

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| | |
|:---|:---|
|  Dividend yield-based on market value | 2.79% |
|  Dividend yield based on NAV | 1.93% |
|  NAV as of March 31, 2026 | $2.72 |
|  Market Price as of March 31, 2026 | $1.88 |
|  Premium (discount) to NAV | (30.9%) |

---

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The Fund seeks to pay monthly dividends out of its net investment income. To permit the Fund to maintain a more stable monthly dividend, the Fund may pay dividends that are more or less than the amount of net income earned during the period. Fund dividends paid during the period included approximately $47,000 net investment income from prior years. See Note 9 of the financial statements for more details.

The Fund's net investment income was $513,437 versus $1.1 million last year. The dividend paid was $560,834 versus $1.1 million last year.

The Fund's investment portfolio is comprised of various security classes. UBS Asset Managers of Puerto Rico, a division of UBS Trust Company of Puerto Rico (the "Investment Adviser") considers numerous characteristics of each asset class to meet the Fund's investment objective. Many securities in which the Fund invests have call dates prior to maturity.

The chart below reflects the breakdown of the Fund's investment portfolio (based on % of Total Investments) as of March 31, 2026. For details of the security categories below, please refer to the enclosed Schedule of Investments.

![LOGO](g160595g10g10.jpg)

The largest Puerto Rico securities holdings, representing 14.47% of the portfolio, are MBS. The MBS included mortgage pools guaranteed by U.S. agencies and mortgage participation certificates from local financial institutions. The balance of the MBS decreased during the period due to repayments of the underlying residential mortgages. The valuation of the MBS decreased slightly during the period.

The second largest Puerto Rico municipal bond holdings in the portfolio, representing 11.15%, are the new-issue Puerto Rico Sales Tax Financing Corporation ("COFINA") bonds. The newly exchanged bonds are secured by

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53.65% of the pledged sales and use tax through 2058, which amounts to $552.9 million for fiscal year 2026, and a 4% increase each year, capping out at $992.5 million in fiscal year 2041. The valuation of the COFINA bonds decreased slightly during the period. Transfers to the bonds' trustee for the redemption of the bonds for fiscal 2026 commenced on July 1, 2025. On October 21, 2025, COFINA announced that 100% of the required Puerto Rico sales and use tax (IVU) collections had been transferred to the bond trustee.

The Fund's largest holdings are comprised of U.S. agencies bonds representing 70.66% of the portfolio. The Fund also owns one U.S. municipal bond representing 3.72% of the portfolio. The valuation of the U.S. agencies and the municipal bond decreased during the period in response to higher yields on the 10-year U.S. treasury note.

There were approximately $7.2 million in long term U.S. agencies calls. The proceeds were used to repay leverage.

The NAV of the Fund decreased $0.02 during the period from $2.74 at the beginning of the period to $2.72 at the end of the period. There was a decrease in the valuation of the portfolio. At period-end the Fund's indicated market value was a 30.9% discount to its NAV, a decrease from the discount of 43.1% at fiscal year-end 2025.

**FUND HOLDINGS SUMMARIES** 

The following tables show the allocation of the Fund's portfolio (based on % of Total Investments) using various metrics as of period-end. It should not be construed as a measure of performance for the Fund itself. The portfolio is actively managed, and holdings are subject to change.

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| | |
|:---|:---|
| **Portfolio Composition**<br> **(% of Total Portfolio)** | **Portfolio Composition**<br> **(% of Total Portfolio)** |
|  Sales and Use Tax (PR) | 11.15% |
|  Mortgages Certificates | 3.69% |
|  Mortgage-Backed Securities | 10.78% |
|  U.S. Agencies | 70.66% |
|  U.S. Municipals - General Obligation | 3.72% |
|  Total | 100.00% |

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| | |
|:---|:---|
| **Geographic Allocation**<br> **(% of Total Portfolio)** | **Geographic Allocation**<br> **(% of Total Portfolio)** |
| Puerto Rico | 25.63% |
|  U.S. | 74.37% |
|  | 100.00% |

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The following table shows the ratings of the Fund's portfolio securities (based on % of Total Investments) as of March 31, 2026. The ratings used are the highest rating given by one of the three nationally recognized rating agencies, Fitch Ratings (Fitch), Moody's Investors Service (Moody's), and S&P Global Ratings (S&P). Ratings are subject to change.

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| | |
|:---|:---|
| **Rating** | **Percent** |
|  AA | 81.34% |
|  A | 3.72% |
|  Below BBB | 3.79% |
|  Not Rated | 11.15% |
|  Total | 100.00% |

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The "Not-Rated" category is comprised of the new-issue COFINA bonds issued in 2019. The bonds were issued without a rating from any of the rating agencies pending a determination by the Board of Directors of COFINA on the appropriate timing to apply for such rating. As of March 31, 2026, the COFINA Board had not applied for a rating.

This material is not intended to be a recommendation or investment advice, does not constitute a solicitation to buy, sell, or hold a security or an investment strategy, and is not provided in a fiduciary capacity. The information provided does not consider the specific objectives or circumstances of any particular investor or suggest any specific course of action. Investment decisions should be made based on an investor's objectives and circumstances and in consultation with his or her financial advisors. The views expressed herein are those of the Investment Adviser as of the date of this report. The Fund disclaims any obligation to update publicly the views expressed herein.

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## FUND LEVERAGE
**THE BENEFITS AND RISKS OF LEVERAGE** 

As a fundamental policy the Fund may only issue senior securities, as defined in the 1940 Act ("Senior Securities"), representing indebtedness to the extent that immediately after their issuance, the value of its total assets, less all the Fund's liabilities and indebtedness that are not represented by Senior Securities being issued or already outstanding, is equal to or greater than the total of 300% of the aggregate par value of all outstanding indebtedness issued by the Fund. The Fund may only issue Senior Securities representing preferred stock to the extent that immediately after any such issuance, the value of its total assets, less all the Fund's liabilities and indebtedness that are not represented by Senior Securities being issued or already outstanding, is equal to or greater than the total of 200% of the aggregate par value of all outstanding preferred stock (not including any accumulated dividends or other distributions attributable to such preferred stock) issued by the Fund. These asset coverage requirements must also be met any time the Fund pays a dividend or makes any other distribution on its issued and outstanding shares of common stock or any shares of its preferred stock (other than a dividend or other distribution payable in additional shares of common stock) as well as any time the Fund repurchases any shares of common stock, in each case after giving effect to such repurchase of shares of common stock or issuance of preferred stock, debt securities, or other forms of leverage in order to maintain asset coverage at the required levels. To the extent necessary, the Fund may purchase or redeem preferred stock, debt securities, or other forms of leverage in order to maintain asset coverage at the required levels. In such instances, the Fund will redeem Senior Securities, as needed, to maintain such asset coverage.

Subject to the above percentage limitations, the Fund may also engage in certain additional borrowings from banks or other financial institutions through reverse repurchase agreements. In addition, the Fund may also borrow for temporary or emergency purposes in an amount of up to an additional 5% of its total assets.

Leverage can produce additional income when the income derived from investments financed with borrowed funds exceeds the cost of such borrowed funds. In such an event, the Fund's net income will be greater than it would be without leverage. On the other hand, if the income derived from securities purchased with borrowed funds is not sufficient to cover the cost of such funds, the Fund's net income will be less than it would be without leverage.

To obtain leverage, the Fund may enter into collateralized reverse repurchase agreements with major institutions in the U.S. and/or may issue TSOs in the local market. Both, if applicable, are accounted for as collateralized borrowings in the financial statements. Typically, the Fund borrows for approximately 30-90 days at

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a variable borrowing rate based on short-term rates. The TSO program was suspended in May 2021, pending registration under the 1933 Act.

As of March 31, 2026, the Fund had the following leverage outstanding:

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| | |
|:---|:---|
|  Reverse Repurchase Agreements | $2325000.0 |
|  Leverage Ratio\* | 7.35% |

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Refer to the Schedule of Investments for details of the securities pledged as collateral and to Note 5 to Financial Statements for further details on outstanding leverage during the year. Fund leverage decreased by $7,325,000 during the period.

*\*Asset Leverage ratio: The sum of (i) the aggregate principal amount of outstanding TSOs plus (ii) the aggregate principal amount of other borrowings by the Fund, including borrowings resulting from the issuance of any other series and other forms of leverage, and from the compliance date of Rule 18f-4 going forward, including borrowings in the form of reverse repurchase agreements, divided by the fair market value of the assets of the Fund on any given day.* 

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 **US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.**<br>

The following table includes selected data for a share outstanding throughout the period and other performance information derived from the financial statements. It should be read in conjunction with the financial statements and notes thereto.

 **FINANCIAL HIGHLIGHTS**<br>

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| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | |  | For the period from<br>October 1, 2025, to<br>March 31, 2026<br>(Unaudited) | For the fiscal<br> year ended<br> September 30, 2025 | For the fiscal<br>year ended<br>September 30, 2024 | For the fiscal<br>year ended<br>September 30, 2023 | For the fiscal<br>year ended<br>September 30, 2022 | For the fiscal<br>year ended<br>September 30, 2021 |
|  ***Increase (Decrease) in Net Asset Value:*** | ***Increase (Decrease) in Net Asset Value:*** | ***Increase (Decrease) in Net Asset Value:*** |  |  |  |  |  |  |
|  **Per Share** |  | Net asset value applicable to common stock, beginning of period | 2.74 | 2.76 | 2.49 | 2.50 | 2.81 | 2.94 |
| **Operating** |  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net investment income (a) | 0.05 | 0.10 | 0.11 | 0.11 | 0.07 | 0.11 |
| **Performance:** |  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net realized gain (loss) and unrealized appreciation<br> (depreciation) |  |  |  |  |  |  |
|  |  | from investments and real estate owned (a) | (0.02) | (0.02) | 0.25 | (0.04) | (0.30) | (0.12) |
|  |  | Total from investment operations | 0.03 | 0.08 | 0.36 | 0.07 | (0.23) | (0.01) |
|  |  | Less: Dividends from net investment income to common<br> shareholders | (0.05) | (0.10) | (0.09) | (0.08) | (0.08) | (0.12) |
|  |  | Discount on repurchase of common stock | - | - | - | - | - | 0.00 \* |
|  |  | Net asset value applicable to common stock, end of period | 2.72 | 2.74 | 2.76 | 2.49 $| 2.50 | 2.81 |
|  |  | Market value, end of period (b) | 1.88 | 1.56 | 1.39 | 1.11 $| 1.09 | 2.19 |
|  **Total Investment** |  |  |  |  |  |  |  |  |
|  **Return:** | (f) | Based on net asset value per share | 1.19% | 3.15% | 14.45% | 2.77% | (8.37)% | 0.09% |
|  **Ratios:** | (c) (d) (e) | Net expenses to average net assets applicable to common shareholders - net of waived fees | 2.83% | 3.28% | 3.48% | 2.83% | 2.37% | 1.93% |
|  | (c) (d) | Gross expenses to average net assets applicable to common shareholders | 3.49% | 4.00% | 4.18% | 3.48% | 2.96% | 2.67% |
|  | (c) | Gross operating expenses to average net assets applicable to common shareholders | 2.61% | 2.47% | 2.54% | 2.53% | 2.90% | 2.58% |
|  | (c) | Interest and leverage related expenses to average net assets applicable to common shareholders | 0.88% | 1.53% | 1.64% | 0.95% | 0.06% | 0.09% |
|  | (c) (e) (h) | Net investment income to average net assets applicable to common shareholders - net of waived fees | 3.51% | 3.85% | 3.68% | 4.32% | 2.60% | 3.72% |
|  **Supplemental Data:** |  | Net assets applicable to common shareholders, end of<br> period (in thousands) | 29062 | 29258 | 29486 | 26557 | 26673 | 29926 |
|  | (g) | Portfolio turnover | 0.00% | 8.79% | 8.72% | 2.21% | 57.98% | 9.72% |
|  | (g) | Portfolio turnover excluding the proceeds from calls and maturities of portfolio securities and the proceeds from mortgage-backed securities paydowns | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.35% |
|  | \* | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. | Discount on repurchase of common stock represents an amount that rounds to zero. |
|  | (a) | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. | Based on average outstanding common shares of 10,682,204, 10,674,258, 10,664,051, 10,654,274, 10,644,730, and 10,634,126 for the period from October 1, 2025, to March 31, 2026, for the fiscal year ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. |
|  | (b) | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. | Period end market values provided by UBS Financial Services, Inc., a dealer of the Fund's shares and an affiliated party. The market values shown may reflect limited trading in shares of the Fund. |
|  | (c) | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. | Based on average net assets applicable to common shareholders of $29,370,219, $28,991,963, $28,202,895, $27,522,908, $29,212,220, and $30,792,086 for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, respectively. Ratios for the period from October 1, 2025, to March 31, 2026, were annualized using a 365-day base. |
|  | (d) | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. | Expenses include both operating and interest and leverage related expenses. |
|  | (e) | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. | The effect of the expenses waived for the period from October 1, 2025, to March 31, 2026, for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, was to decrease the expense ratios, thus increasing the net investment income ratio to average net assets by 0.66%, 0.72%, 0.70%, 0.65%, 0.59%, and 0.74%, respectively. |
|  | (f) | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. | Dividends are assumed to be reinvested at the per share market value or net asset value as defined in the dividend reinvestment plan. For the period from October 1, 2025, to March 31, 2026, and for the fiscal years ended September 30, 2025, September 30, 2024, September 30, 2023, September 30, 2022, and September 30, 2021, dividends were reinvested at net asset value. Investment return is not annualized for the period from October 1, 2025, to March 31, 2026. |
|  | (g) | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. | Portfolio turnover is not annualized for the period from October 1, 2025, to March 31, 2026. For the fiscal year ended September 30, 2022, portfolio turnover calculation excludes transactions related to the restructuring of Employee Retirement System Bonds which became effective on March 15, 2022. |
|  | (h) | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. | Net investment income ratio for the fiscal year ended September 30, 2023, includes a legal settlement received which was classified as Other Income in the Statement of Operations. |

---

The accompanying notes are an integral part of these financial statements.

------

&nbsp;&nbsp;&nbsp;&nbsp;**US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.**<br>

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;**SCHEDULE OF INVESTMENTS** | **March 31, 2026 (Unaudited)** |

---

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Face Amount** | **Issuer** | **Coupon** | **Maturity**<br> **Date** | **Value** |
| **Puerto Rico Agencies Bonds and Notes - 9.47% of net assets applicable to common shareholders, total cost of $2,864,370** | **Puerto Rico Agencies Bonds and Notes - 9.47% of net assets applicable to common shareholders, total cost of $2,864,370** | **Puerto Rico Agencies Bonds and Notes - 9.47% of net assets applicable to common shareholders, total cost of $2,864,370** | **Puerto Rico Agencies Bonds and Notes - 9.47% of net assets applicable to common shareholders, total cost of $2,864,370** | **Puerto Rico Agencies Bonds and Notes - 9.47% of net assets applicable to common shareholders, total cost of $2,864,370** |
| $111000 H | Puerto Rico Sales Tax | 4.50% | 07/01/34 | $110998 |
| 56000 H | Puerto Rico Sales Tax | 4.55% | 07/01/40 | 55781 |
| 411000 H | Puerto Rico Sales Tax | 4.75% | 07/01/53 | 382718 |
| 1255000 H | Puerto Rico Sales Tax | 5.00% | 07/01/58 | 1193062 |
| 570000 H | Puerto Rico Sales Tax | 4.33% | 07/01/40 | 561740 |
| 17000 H | Puerto Rico Sales Tax | 4.54% | 07/01/53 | 15192 |
| 469000 H | Puerto Rico Sales Tax | 4.78% | 07/01/58 | 433027 |
| $2889000 |  |  |  | $2752518 |
| **Puerto Rico Agencies Zero Coupons Bonds - 2.43% of net assets applicable to common shareholders, total cost of $685,125** | **Puerto Rico Agencies Zero Coupons Bonds - 2.43% of net assets applicable to common shareholders, total cost of $685,125** | **Puerto Rico Agencies Zero Coupons Bonds - 2.43% of net assets applicable to common shareholders, total cost of $685,125** | **Puerto Rico Agencies Zero Coupons Bonds - 2.43% of net assets applicable to common shareholders, total cost of $685,125** | **Puerto Rico Agencies Zero Coupons Bonds - 2.43% of net assets applicable to common shareholders, total cost of $685,125** |
| $1181000 J | Puerto Rico Sales Tax | 0.00% | 07/01/46 | $413805 |
| 1143000 J | Puerto Rico Sales Tax | 0.00% | 07/01/51 | 291505 |
| $2324000 |  |  |  | $705310 |
| **Principal<br>Outstanding<br>Amount** |  |  |  |  |
| **Puerto Rico Collateralized Mortgage Obligations Taxable - 1.80% of net assets applicable to common shareholders, total cost of $623,801** | **Puerto Rico Collateralized Mortgage Obligations Taxable - 1.80% of net assets applicable to common shareholders, total cost of $623,801** | **Puerto Rico Collateralized Mortgage Obligations Taxable - 1.80% of net assets applicable to common shareholders, total cost of $623,801** | **Puerto Rico Collateralized Mortgage Obligations Taxable - 1.80% of net assets applicable to common shareholders, total cost of $623,801** | **Puerto Rico Collateralized Mortgage Obligations Taxable - 1.80% of net assets applicable to common shareholders, total cost of $623,801** |
| $57652 A G | CSMC Series 2007-5 Class AM | 5.86% | 08/25/37 | $28916 |
| 566150 F G | Doral Financial Participation Certificate 2004 Series A | 8.61% | 12/01/31 | 492608 |
| $623802 B |  |  |  | $521524 |
| **Puerto Rico Collateralized Non Conforming Mortgage Obligations Taxable- 2.24% of net assets applicable to common shareholders, total cost of $830,334** | **Puerto Rico Collateralized Non Conforming Mortgage Obligations Taxable- 2.24% of net assets applicable to common shareholders, total cost of $830,334** | **Puerto Rico Collateralized Non Conforming Mortgage Obligations Taxable- 2.24% of net assets applicable to common shareholders, total cost of $830,334** | **Puerto Rico Collateralized Non Conforming Mortgage Obligations Taxable- 2.24% of net assets applicable to common shareholders, total cost of $830,334** | **Puerto Rico Collateralized Non Conforming Mortgage Obligations Taxable- 2.24% of net assets applicable to common shareholders, total cost of $830,334** |
| $662767 F G | R&G Non Conforming Mortgage Loan Trust Series 2004-A | 4.86% | 05/01/34 | $516337 |
| 57671 F G | R&G Non Conforming Mortgage Loan Trust Series 2004-B | 5.40% | 05/01/34 | 47074 |
| 61736 F G | R&G Non Conforming Mortgage Loan Trust Series 2005-C | 6.00% | 09/01/34 | 50160 |
| 48160 F G | R&G Non Conforming Mortgage Loan Trust Series 2005-D | 6.25% | 10/01/34 | 38724 |
| $830334 B |  |  |  | $652295 |
| **Puerto Rico GNMA Taxable - 0.83% of net assets applicable to common shareholders, total cost of $229,077** | **Puerto Rico GNMA Taxable - 0.83% of net assets applicable to common shareholders, total cost of $229,077** | **Puerto Rico GNMA Taxable - 0.83% of net assets applicable to common shareholders, total cost of $229,077** | **Puerto Rico GNMA Taxable - 0.83% of net assets applicable to common shareholders, total cost of $229,077** | **Puerto Rico GNMA Taxable - 0.83% of net assets applicable to common shareholders, total cost of $229,077** |
| $183143 | GNMA Pool 592858 | 6.00% | 12/15/35 | $193168 |
| 45934 | GNMA Pool 618199 | 6.50% | 11/15/34 | 48726 |
| $229077 C |  |  |  | $241894 |
| **Puerto Rico FNMA Taxable - 9.68% of net assets applicable to common shareholders, total cost of $2,683,296** | **Puerto Rico FNMA Taxable - 9.68% of net assets applicable to common shareholders, total cost of $2,683,296** | **Puerto Rico FNMA Taxable - 9.68% of net assets applicable to common shareholders, total cost of $2,683,296** | **Puerto Rico FNMA Taxable - 9.68% of net assets applicable to common shareholders, total cost of $2,683,296** | **Puerto Rico FNMA Taxable - 9.68% of net assets applicable to common shareholders, total cost of $2,683,296** |
| $77145 | FNMA Pool 758514 | 6.00% | 01/01/34 | $78639 |
| 12281 | FNMA Pool 758520 | 5.50% | 02/01/34 | 12343 |
| 39154 | FNMA Pool 758521 | 6.50% | 02/01/34 | 40479 |
| 55667 | FNMA Pool 758544 | 5.50% | 05/01/34 | 56952 |
| 946673 | FNMA Pool 835565 | 6.00% | 10/01/35 | 1001841 |
| 367075 | FNMA Pool 905018 | 6.00% | 05/01/37 | 388491 |
| 617093 | FNMA Pool 905048 | 6.00% | 07/01/37 | 650720 |
| 19828 | FNMA Pool 682079 | 6.00% | 11/01/32 | 20361 |
| 396482 | FNMA Pool 747044 | 5.50% | 03/01/34 | 399368 |
| 18083 | FNMA Pool 758560 | 6.00% | 08/01/34 | 18846 |
| 138982 | FNMA Pool 887184 | 6.00% | 06/01/36 | 144856 |
| $2688463 D |  |  |  | $2812896 |
| **Puerto Rico Freddie Mac Taxable - 0.88% of net assets applicable to common shareholders, total cost of $245,980** | **Puerto Rico Freddie Mac Taxable - 0.88% of net assets applicable to common shareholders, total cost of $245,980** | **Puerto Rico Freddie Mac Taxable - 0.88% of net assets applicable to common shareholders, total cost of $245,980** | **Puerto Rico Freddie Mac Taxable - 0.88% of net assets applicable to common shareholders, total cost of $245,980** | **Puerto Rico Freddie Mac Taxable - 0.88% of net assets applicable to common shareholders, total cost of $245,980** |
| $83098 | FHLMC Pool A50587 | 6.50% | 06/01/36 | $87957 |
| 160883 | FHLMC Pool A51301 | 6.00% | 07/01/36 | 167883 |
| 2000 | FHLMC Pool A51302 | 6.00% | 06/01/36 | 2041 |
| $245981 E |  |  |  | $257881 |
| **Face Amount** |  |  |  |  |
| **US Government, Agency and Instrumentalities - 75.36% of net assets applicable to common shareholders, total cost of $23,100,000** | **US Government, Agency and Instrumentalities - 75.36% of net assets applicable to common shareholders, total cost of $23,100,000** | **US Government, Agency and Instrumentalities - 75.36% of net assets applicable to common shareholders, total cost of $23,100,000** | **US Government, Agency and Instrumentalities - 75.36% of net assets applicable to common shareholders, total cost of $23,100,000** | **US Government, Agency and Instrumentalities - 75.36% of net assets applicable to common shareholders, total cost of $23,100,000** |
| $4000000 | Federal Farm Credit | 2.75% | 04/22/41 | $3079004 |
| 2000000 | Federal Farm Credit | 5.05% | 08/18/42 | 1979304 |
| 3600000 | Federal Farm Credit | 4.85% | 04/28/42 | 3517438 |
| 10500000 I | Federal Farm Credit | 5.48% | 06/27/42 | 10339571 |
| 1000000 | Federal Home Loan Bank | 5.20% | 09/28/37 | 988082 |
| 2000000 | Federal Home Loan Bank | 5.87% | 04/10/45 | 1998560 |
| $23100000 |  |  |  | $21901959 |
| **US Municipals - 3.97% of net assets applicable to common shareholders, total cost of $1,071,429** | **US Municipals - 3.97% of net assets applicable to common shareholders, total cost of $1,071,429** | **US Municipals - 3.97% of net assets applicable to common shareholders, total cost of $1,071,429** | **US Municipals - 3.97% of net assets applicable to common shareholders, total cost of $1,071,429** | **US Municipals - 3.97% of net assets applicable to common shareholders, total cost of $1,071,429** |
| $1071429 | State of Illinois General Obligations | 7.35% | 07/01/35 | $1151950 |
| **Total investments (106.66% of net assets applicable to common shareholders)** | **Total investments (106.66% of net assets applicable to common shareholders)** |  |  | $30998227 |
| **Other Assets and Liabilities net (-6.66% of net assets applicable to common shareholders)** | **Other Assets and Liabilities net (-6.66% of net assets applicable to common shareholders)** |  |  | (1935968) |
| **Net assets applicable to common shareholders - 100%** | **Net assets applicable to common shareholders - 100%** |  |  | $29062259 |

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The accompanying notes are an integral part of these financial statements.

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| | | |
|:---|:---|:---|
| **US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.** | **US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.** | **US MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.** |
| **SCHEDULE OF INVESTMENTS** | **SCHEDULE OF INVESTMENTS** | **March 31, 2026 (Unaudited)** |
| **Securities sold under reverse repurchase agreements - 8.00% of net assets applicable to common shareholders** | **Securities sold under reverse repurchase agreements - 8.00% of net assets applicable to common shareholders** |  |
| $2325000 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Reverse Repurchase Agreements with Santander US Capital Markets | $2325000 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.88% dated March 18, 2026, due April 7, 2026 (Collateralized by US Government, Agencies and Instrumentalities with a face value of $2,550,000 and a fair value of $2,510,985; 5.48% with maturity date of June 27, 2042) |  |
|  | A The Credit Suisse CMO is comprised of one subordinate tranche of a securitization.<br>B Certificates are collateralized by residential mortgage loans. They are subject to pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>C GNMA - represents mortgage-backed obligations guaranteed by the Government National Mortgage Association. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>D FNMA - represents mortgage-backed obligations guaranteed by the Federal National Mortgage Association. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>E FHLMC - represents mortgage-backed obligations guaranteed by the Federal Home Loans Mortgage Corporation. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>F Private placement. | A The Credit Suisse CMO is comprised of one subordinate tranche of a securitization.<br>B Certificates are collateralized by residential mortgage loans. They are subject to pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>C GNMA - represents mortgage-backed obligations guaranteed by the Government National Mortgage Association. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>D FNMA - represents mortgage-backed obligations guaranteed by the Federal National Mortgage Association. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>E FHLMC - represents mortgage-backed obligations guaranteed by the Federal Home Loans Mortgage Corporation. They are subject to principal paydowns as a result of pre-payments or refinancing of the underlying mortgage instruments. As a result, the average life may be substantially less than the original maturity.<br>F Private placement. |
|  | <br> G Significant unobservable inputs were used in the valuation of these securities and as a result, they are classified as Level 3. See Note 1 for further information.<br>H Revenue Bonds - issued by agencies and payable from revenues and other sources of income of the corresponding agency as specified in the applicable prospectus. These bonds are not obligations of the Commonwealth of Puerto Rico. | <br> G Significant unobservable inputs were used in the valuation of these securities and as a result, they are classified as Level 3. See Note 1 for further information.<br>H Revenue Bonds - issued by agencies and payable from revenues and other sources of income of the corresponding agency as specified in the applicable prospectus. These bonds are not obligations of the Commonwealth of Puerto Rico. |
|  | <br> I A portion or all of the security has been pledged as collateral for securities sold under reverse repurchase agreements.<br>J Issued with a zero coupon. Income is recognized through the accretion of discount. | <br> I A portion or all of the security has been pledged as collateral for securities sold under reverse repurchase agreements.<br>J Issued with a zero coupon. Income is recognized through the accretion of discount. |

---

The accompanying notes are an integral part of these financial statements.

------

 **US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.**<br>

---

| | | | |
|:---|:---|:---|:---|
| **STATEMENT OF ASSETS AND LIABILITIES** | **STATEMENT OF ASSETS AND LIABILITIES** | **March 31, 2026 (Unaudited)** | **March 31, 2026 (Unaudited)** |
|  **Assets:** | Investments in securities: |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Securities pledged as collateral on reverse repurchase agreements at value,<br>which has the right to be repledged (identified cost - $2,550,000) |  | $2510985 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other securities, at value (identified cost - $29,783,412) |  | 28487242 |
|  |  |  | $30998227 |
|  | Cash |  | 212695 |
|  | Interest receivable |  | 412960 |
|  | Prepaid expenses and other assets |  | 138 |
|  | Total assets |  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;31624020 |
|  **Liabilities:** | Securities sold under reverse repurchase agreements |  | 2328508 |
|  | Dividends payable to common shareholders |  | 93490 |
|  | Directors' fee payable |  | 5967 |
|  | Payables: |  |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Investment advisory fees | 6719 |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Administration, custody, and transfer agent fees | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4352 | 11071 |
|  | Accrued expenses and other liabilities |  | 122725 |
|  | Total liabilities |  | 2561761 |
|  **Net Assets Applicable to Common Shareholders:** | **Net Assets Applicable to Common Shareholders:** |  | $29062259 |
|  **Net Assets Applicable to** |  |  |  |
| **Common Shareholders consist of:** | Paid-in-Capital ($0.01 par value, 88,000,000 shares authorized, 10,684,513 issued and outstanding) | Paid-in-Capital ($0.01 par value, 88,000,000 shares authorized, 10,684,513 issued and outstanding) | $134354964 |
|  | Total Distributable Earnings (Accumulated Loss) (See Notes 1 and Note 9) |  | (105292705) |
|  | Net assets applicable to common shareholders |  | $29062259 |
|  | Net asset value applicable to common shares - per share; 10,684,513 sharesoutstanding |  | $2.72 |

---

The accompanying notes are an integral part of these financial statements.

------

 **US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.**

 **STATEMENT OF OPERATIONS**

---

| | | |
|:---|:---|:---|
| | | **For the period from<br>October 1, 2025, to<br>March 31, 2026<br>(Unaudited)** |
|  **Investment Income:** | Interest | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;927553 |
|  **Expenses:** | Interest and leverage related expenses | 128225 |
|  | Investment advisory fees | 131982 |
|  | Administration, custody, and transfer agent fees | 37018 |
|  | Professional fees | 119489 |
|  | Directors' fees and expenses | 15909 |
|  | Insurance expense | 10546 |
|  | Mortgage servicing fees | 14388 |
|  | Reporting fees | 18948 |
|  | Pricing fees | 15357 |
|  | Other | 19203 |
|  | &nbsp;&nbsp;&nbsp;&nbsp; Total expenses | 511065 |
|  | Waived investment advisory, administration, custodian, and transfer agent fees | (96939) |
|  | &nbsp;&nbsp;&nbsp;&nbsp; Net expenses after waived fees by investment adviser, administration, custodian and transfer agent fees | 414126 |
|  **Net Investment Income:** |  | 513427 |
|  **Realized Gain (Loss) and** | Net realized gain (loss) on investments | 902 |
|  **Unrealized Appreciation** | Net realized gain (loss) on swaps | 228 |
| **(Depreciation) on Investments** | Change in net unrealized appreciation (depreciation) on investments | (161941) |
|  **and Swaps:** | &nbsp;&nbsp;&nbsp;&nbsp; Total net realized and unrealized gain (loss) on investments and swaps | (160811) |
|  | **Net increase (decrease) in net assets resulting from operations** | $352616 |

---

The accompanying notes are an integral part of these financial statements.

------

 **US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.**

 **STATEMENTS OF CHANGES IN NET ASSETS**

---

| | | | |
|:---|:---|:---|:---|
| **Increase (Decrease) in Net Assets:** | **Increase (Decrease) in Net Assets:** | **For the period from<br>October 1, 2025, to<br>March 31, 2026<br>(Unaudited)** | **For the fiscal<br>year ended<br>September 30, 2025** |
|  | Net investment income | $513427 | $1117439 |
|  | Net realized gain (loss) on investments and swaps | 1130 | 21600 |
|  | Change in unrealized appreciation (depreciation) on investments | (161941) | (285877) |
|  | Net increase (decrease) in net assets resulting from operations | 352616 | 853162 |
|  **Dividends to Common** |  |  |  |
|  **Shareholders From:** | Net investment income | (560834) | (1111948) |
|  **Capital Share** | Reinvestment of dividends on common shares | 12917 | 29926 |
|  **Transactions:** | Repurchase of common shares | - | - |
|  |  | 12917 | 29926 |
|  **Net Assets:** |  |  |  |
|  | Net increase (decrease) in net assets applicable to common shareholders | (195301) | (228860) |
|  | Net assets at the beginning of the period/year | 29257560 | 29486420 |
|  | Net assets at the end of the period/year | $29062259 | $29257560 |

---

The accompanying notes are an integral part of these financial statements.

------

 **US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.**<br>

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; **STATEMENT OF CASH FLOWS** | &nbsp;&nbsp;&nbsp; **STATEMENT OF CASH FLOWS** | |
| **Increase (Decrease) in Cash** | | <br>**For the period from<br>October 1, 2025, to<br>March 31, 2026**<br>**(Unaudited)** |
| **Cash Used in** | Net increase (decrease) in net assets from operations | $352616 |
| **Operations:** | Adjusted by: |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Purchases of short-term portfolio securities | (3606158) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Calls and paydowns of long-term portfolio securities | 7159337 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Maturities of short-term portfolio securities | 3609000 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net realized gain on investments | (902) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Change in unrealized (appreciation) depreciation on investments | 161941 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Amortization and accretion of premiums and discounts on investments | (20748) |
|  | (Increase)/Decrease in assets: |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest receivable | 158059 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Prepaid expenses and other assets | 7754 |
|  | Increase/(Decrease) in liabilities: |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest payable | (5992) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Directors' fee payable | (33) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Investment advisory fees payable | (9366) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Administration, custody, and transfer agent fees payable | (5610) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accrued expenses and other liabilities | (99465) |
|  | Total cash used in operations | 7700433 |
| **Cash Provided by** |  |  |
| **Financing Activities:** | Securities sold under reverse repurchase agreements proceeds | 35475000 |
|  | Securities sold under reverse repurchase agreements repayments | (42800000) |
|  | Dividends to common shareholders paid in cash | (547837) |
|  | Total cash provided by financing activities | (7872837) |
| **Cash:** | Net increase (decrease) in cash for the period | (172404) |
|  | Cash at the beginning of the period | 385099 |
|  | Cash at the end of the period | 212695 |
| **Cash Flow** |  |  |
| **Information:** | Cash paid for interest and leverage related expenses | $134217 |
|  | Non-cash activities-dividends reinvested by common shareholders | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12917 |

---

The accompanying notes are an integral part of these financial statements.

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

**1.** **Reporting Entity and Significant Accounting Policies** 

US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc. (the "Fund") is a non-diversified closed-end management investment company. The Fund is a corporation organized under the laws of the Commonwealth of Puerto Rico ("Puerto Rico") and is registered as an investment company under the Investment Company Act of 1940, as amended (the "1940 Act") as of May 14, 2021. Prior to such date and since inception, the Fund was registered and operated under the Puerto Rico Investment Companies Act of 1954, as amended. The Fund was incorporated on October 13, 2004, and commenced operations on November 3, 2004. UBS Asset Managers of Puerto Rico, a division of UBS Trust Company of Puerto Rico ("UBSTC"), is the Fund's Investment Adviser. UBSTC is the Fund's Administrator ("Administrator").

The Fund's investment objective is to provide current income, consistent with the preservation of capital.

On May 24, 2018, the Economic Growth, Regulatory Relief, and Consumer Protection Act (Pub. L. No. 115-174) was signed into law and amended the 1940 Act to repeal the exemption from its registration of investment companies created under the laws of Puerto Rico, the U.S. Virgin Islands, or any other U.S. possession under Section 6(a)(1) thereof. The repeal of the exemption took effect on May 24, 2021. Upon the Fund's registration under the 1940 Act, it must now register its future offerings of securities under the 1933 Act, absent an available exception. There is limited trading in Fund shares, which are not registered under the 1933 Act, and are only traded via private transactions.

Certain charter provisions of the Fund might be void and unenforceable under the 1940 Act including, without limitation, provisions (i) permitting indemnification of officers and directors to the fullest extent permitted by Puerto Rico law, (ii) setting forth the required vote for changes to fundamental policies of the Fund, and (iii) stating that, to the fullest extent permitted by Puerto Rico law, no officer or director will be liable to the Fund or shareholders.

The following is a summary of the Fund's significant accounting policies:

**Use of Estimates in Financial Statements Preparation** 

The Fund is an investment company that applies the accounting and reporting guidance applicable to investment companies in the Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic 946, Financial Services-Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles ("GAAP"), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

**Net Asset Value Per Share** 

The NAV per share of the Fund is determined by the Administrator on Wednesday of each week after the close of trading on the New York Stock Exchange (NYSE) or, if such day is not a business day in New York or Puerto Rico, on the next succeeding business day, and at month-end if such date is not a Wednesday. The NAV per share is computed by dividing the total assets of the Fund, less its liabilities, by the total number of outstanding shares of the Fund.

**Valuation of Investments** 

The Fund's assets are valued by UBSTC on the basis of valuations provided by pricing services or by dealers which were approved by Fund management and the Board of Directors (the "Board"). In arriving at their valuation, pricing sources may use both a grid matrix of securities values as well as

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

the evaluations of their staff. The valuation, in either case, could be based on information concerning actual market transactions and quotations from dealers or a grid matrix performed by an outside vendor that reviews certain market and security factors to arrive at a bid price for a specific security. Certain Puerto Rico obligations have a limited number of market participants and, thus, might not have a readily ascertainable market value and may have periods of illiquidity. If the Fund has securities for which quotations are not readily available from any source, they will be fair valued by or under the direction of the Investment Adviser utilizing quotations and other information concerning similar securities obtained from recognized dealers. The Investment Adviser can override any price that it believes is not consistent with market conditions. Valuation adjustments are limited to those necessary to ensure that the financial instrument's fair value is adequately representative of the price that would be received or paid in the marketplace. These adjustments include amounts that reflect counterparty credit quality, constraints on liquidity, and unobservable parameters that are applied consistently.

The Board has designated the Investment Adviser as the valuation designee pursuant to Rule 2a-5 of the 1940 Act and has delegated to the Investment Adviser the responsibility for making fair value determinations with respect to portfolio holdings. The Investment Adviser has established a Valuation Committee (the "Committee") which is responsible for overseeing the pricing and valuation of all securities held by the Fund. The Committee operates under pricing and valuation policies and procedures established by the Investment Adviser and approved by the Board. The policies and procedures set forth the mechanisms and processes to be employed on a weekly basis related to the valuation of portfolio securities for the purpose of determining the NAV of the Fund. The Committee reports to the Board on a regular basis.

GAAP provides a framework for measuring fair value and expands disclosures about fair value measurements and requires disclosure surrounding the various inputs that are used in determining the fair value of the Fund's investments. These inputs are summarized in three broad levels listed below:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Level 1 - Quoted prices in active markets for identical assets and liabilities at the measurement date. An active market
is one in which transactions for the assets occur with sufficient frequency and volume to provide pricing information on an ongoing basis.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Level 2 - Significant inputs other than quoted prices included in Level 1 that are observable (including quoted
prices for similar securities, interest rates, pre-payment speeds, credit risk, etc.), either directly or indirectly.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Level 3 - Significant unobservable inputs, for example, inputs derived through extrapolation that cannot be corroborated
by observable market data. These will be developed based on the best information available in the circumstances, which might include UBSTC's own data. Level 3 inputs will consider the assumptions that market participants would use in
pricing the asset, including assumptions about risk (e.g., credit risk, model risk, etc.).

Securities and other assets that cannot be priced according to the methods described above are valued based on policies and procedures approved by the Committee. In the event that unobservable inputs are used when determining such valuations, the securities will be classified as Level 3 in the fair value hierarchy. Altering one or more unobservable inputs may result in a significant change to a Level 3 security's fair value measurement. The Fund maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the observable inputs be used when available. Fair value is based upon quoted market prices when available.

The estimated fair value may be subjective in nature and may involve uncertainties and matters of significant judgment for certain financial instruments. Changes in the underlying assumptions used in

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

calculating fair value could significantly affect the results. Therefore, the estimated fair value may materially differ from the value that could actually be realized on sale.

The inputs and methodology used for valuing securities or level assigned are not necessarily an indication of the risk associated with investing in those securities.

Following is a description of the Fund's valuation methodologies used for assets and liabilities measured at fair value:

***Puerto Rico Agencies, Bonds, and Notes:*** Obligations of Puerto Rico and political subdivisions are segregated and those with similar characteristics are then divided into specific sectors. The values for these securities are obtained from third-party pricing service providers that use a pricing methodology based on observable market inputs. Market inputs used in the evaluation process include all or some of the following: trades, bid price or spread quotes, benchmark curves (including, but not limited to, Treasury benchmarks and swap curves), and discount and capital rates. These bonds are classified as Level 2.

***Puerto Rico Collateralized Mortgage Obligations ("CMOs")***: Pricing for this security is obtained from an independent firm using models that calculate the present value of expected future cash flows. Those models incorporate estimates that market participants would use in determining fair value, including estimates of prepayment speeds, credit losses, and discount rates. CMOs are classified as Level 3.

***R&G Financial Corporation Non-Conforming Mortgage Loans:*** Units of various grantor trusts, each comprised of mortgage loans acquired from R&G Financial Corporation, were valued by an independent firm using models that calculate the present value of expected future cash flows. Those models incorporate estimates that market participants would use in determining fair value, including estimates of prepayment speeds, credit losses, and discount rates. These loan trusts are classified as Level 3.

***Obligations of U.S. Government Sponsored Entities, States, and Municipalities:*** The fair value of obligations of U.S. government sponsored entities, states, and municipalities is obtained from third-party pricing service providers that use a pricing methodology based on an active exchange market and quoted market prices for similar securities. These securities are classified as Level 2. U.S. agency notes are priced based on a bond's theoretical value from similar bonds defined by credit quality and market sector and for which the fair value incorporates an option adjusted spread in deriving their fair value. These securities are classified as Level 2.

The following is a summary of the portfolio by inputs used as of March 31, 2026, in valuing the Fund's investments carried at fair value:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Assets** | **Assets** | **Assets** | **Assets** |
|  | **Level 1** | **Level 2** | **Level 3** | **Balance**<br>**3/31/2026** |
|  **Investment Securities:** |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico Agencies, Bonds, and Notes | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | $3457828 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | $3457828 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico Collateralized Mortgage Obligations Taxable | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 521524 | 521524 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico Collateralized Non-Conforming Mortgage Obligations Taxable | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 652295 | 652295 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico GNMA Taxable | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 241894 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 241894 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico FNMA Taxable | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 2812896 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 2812896 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Puerto Rico Freddie Mac Taxable | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 257881 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 257881 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; US Government, Agency and Instrumentalities | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 21901959 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 21901959 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; US Municipals | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 1151950 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 1151950 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total of investment securities | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- | 29824408 | 1173819 | 30998227 |

---

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

The following is a reconciliation of assets for which Level 3 inputs were used in determining fair value:

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** | **Level 3 Investment Securities** |
|  | **Balance as of <br>9/30/2025** | **Realized Gain<br>(Loss)** | **Change in<br>Unrealized<br>(Depreciation)//<br>Appreciation** | **Net<br>Amortizationin<br>Accretion** | **Purchases**<br>**Additions** | **Sales/Calls** | **Paydowns** | **Transfers<br>(out) to<br>Level 3** | **Balance as<br>of<br>3/31/2026** |
|  CSMC Series 2007-5 Class AM | $36771 | $741 | $(2799) | $- | $- | $- | $(5797) | $- | $28916 |
|  R&G Non-Conforming Mortgage Loan Trust Series 2004-A | 522470 |  | 1202 |  |  |  | (7335) |  | 516337 |
|  R&G Non-Conforming Mortgage Loan Trust Series 2004-B | 51120 |  | 1152 |  |  |  | (5198) |  | 47074 |
|  R&G Non-Conforming Mortgage Loan Trust Series 2005-C | 52643 |  | 898 |  |  |  | (3381) |  | 50160 |
|  R&G Non-Conforming Mortgage Loan Trust Series 2005-D | 40808 |  | 786 |  |  |  | (2870) |  | 38724 |
|  Doral Financial Participation Certificate 2004 Series A | 558299 | (102) | 16040 |  |  |  | (81629) |  | 492608 |
|  | $1262111 | $639 | $17279 | $- | $- | $- | $(106210) | $- | $1173819 |

---

Quantitative Information about Level 3 Fair Value Measurements:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | Fair Value at<br>March 31, 2026 | Valuation Technique | Unobservable Inputs | Unobservable Inputs | Price |
|  **Investment Securities:** |  |  |  |  |  |
|  R&G Non-Conforming Mortgage Loan Trust Series 2004-A | $516337 | Discounted Cash Flow | Constant prepayment rate | 17.32% | $77.91 |
|  |  |  | Probability of default | 1.50% |  |
|  |  |  | Loss severity | 20.00% |  |
|  |  |  | Discount rate | 12.68% |  |
|  R&G Non-Conforming Mortgage Loan Trust Series 2004-B | 47074 | Discounted Cash Flow | Constant prepayment rate | 11.97% | 81.63 |
|  |  |  | Probability of default | 1.00% |  |
|  |  |  | Loss severity | 20.00% |  |
|  |  |  | Discount rate | 16.00% |  |
|  R&G Non-Conforming Mortgage Loan Trust Series 2005-C | 50160 | Discounted Cash Flow | Constant prepayment rate | 10.09% | 81.25 |
|  |  |  | Probability of default | 1.00% |  |
|  |  |  | Loss severity | 20.00% |  |
|  |  |  | Discount rate | 14.54% |  |
|  R&G Non-Conforming Mortgage Loan Trust Series 2005-D | 38724 | Discounted Cash Flow | Constant prepayment rate | 10.22% | 80.41 |
|  |  |  | Probability of default | 1.00% |  |
|  |  |  | Loss severity | 20.00% |  |
|  |  |  | Discount rate | 14.98% |  |
|  Doral Financial Participation Certificate 2004 Series A | 492608 | Discounted Cash Flow | Constant prepayment rate | 4.12% | 87.01 |
|  |  |  | Probability of default | 12.29% |  |
|  |  |  | Loss severity | 4.47% |  |
|  |  |  | Discount rate | 13.63% |  |

---

Significant changes in all unobservable inputs of the pricing process would result in an inverse relationship in the fair value of the security.

Changes in unrealized appreciation (depreciation) included in the Statement of Operations relating to investments classified as Level 3 that are still held on March 31, 2026, amounted to a net unrealized appreciation of $648.

There were no transfers into or out of Level 3 during the period from October 1, 2025, to March 31, 2026.

Temporary cash investments are valued at amortized cost, which approximates market value. There were no temporary cash investments as of March 31, 2026.

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

**Taxation** 

As a registered investment company under the 1940 Act, the Fund will not be subject to Puerto Rico income tax for any taxable year if it distributes at least 90% of its taxable net investment income for such year, as determined for these purposes pursuant to section 1112.01(a)(2) of the Puerto Rico Internal Revenue Code of 2011, as amended. Accordingly, as the Fund intends to meet this distribution requirement, the income earned by the Fund is not subject to Puerto Rico income tax at the Fund level.

The Fund can invest in taxable and tax-exempt securities. In general, distributions of taxable income dividends, if any, to Puerto Rico individuals, estates, and trusts are subject to a Puerto Rico withholding tax of 15% in the case of dividends distributed if certain requirements are met. Moreover, distribution of capital gains dividends, if any, to (a) Puerto Rico individuals, estates, and trusts are subject to a Puerto Rico income tax of 15% in the case of dividends distributed, and (b) Puerto Rico corporations are subject to a Puerto Rico income tax of 20% of the dividends distributed. Puerto Rico income tax withholdings are effected at the time of payment of the corresponding dividend. Individual shareholders may be subject to Puerto Rico alternate basic tax on certain fund distributions. Certain Puerto Rico entities receiving taxable income dividends are entitled to claim an 85% dividends received deduction.

For U.S. federal income tax purposes, the Fund is treated as a foreign corporation and does not intend to be engaged in a trade or business within the United States. As a foreign corporation not engaged in a trade or business in the United States, the Fund should generally not be subject to U.S. income tax on gains derived from the sale or exchange of personal property. Nevertheless, if it is determined that the Fund is engaged in a trade or business within the United States for purposes of the U.S. Internal Revenue Code of 1986, as amended ("U.S. Code"), and the Fund has taxable income that is effectively connected with such U.S. trade or business, the Fund will be subject to regular U.S. corporate income tax on its effectively connected taxable income, and maybe to a 30% branch profits tax and state and local taxes as well. Also, the Fund is subject to a 30% U.S. withholding tax on certain types of income from sources within the U.S., such as dividends and interest.

An investment in the Fund is designed solely for Puerto Rico residents due to the Fund's specific tax features. The Fund does not intend to qualify as a Regulated Investment Company ("RIC") under Subchapter M of the U.S. Code, and consequently an investor that is not (i) an individual who has his or her principal residence in Puerto Rico or (ii) a person, other than an individual, that has its principal office and principal place of business in Puerto Rico will not receive the tax benefits of an investment in a typical U.S. mutual fund (such as RIC tax treatment, i.e., availability of pass-through tax status for non-Puerto Rico residents) and may have adverse tax consequences for U.S. federal income tax purposes. If United States holders (which includes, but is not limited to, (i) citizens and residents of the United States who are not Puerto Rico individuals and (ii) corporations organized in the United States) invest in the Fund, such United States holders generally will be taxed on any dividend or interest paid by the Fund as ordinary income at the time such holders receive the dividend or interest or when it accrues, depending on such holder's method of accounting for tax purposes. Additionally, United States holders will be taxed on any gain on the sale of an investment in the Fund.

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

FASB Accounting Standards Codification Topic 740, Income Taxes (ASC 740) requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Fund's tax returns to determine whether the tax positions are "more-likely-than-not" of being sustained by the applicable tax authority. Tax positions not deemed to meet the "more-likely-than-not" threshold are recorded as a tax benefit or expense in the current year. Management has analyzed the Fund's tax positions taken on its Puerto Rico income tax returns for all open tax years (the prior four tax years) and has concluded that there are no uncertain tax positions. On an ongoing basis, management will monitor the Fund's tax position to determine if adjustments to this conclusion are necessary. The Fund recognizes interest and penalties, if any, related to uncertain tax positions as income tax expenses in the Statement of Operations. During the period from October 1, 2025, to March 31, 2026, the Fund did not incur any interest or penalties.

**Statement of Cash Flows** 

The Fund issues its shares, invests in securities, and distributes dividends from net investment income and net realized gains which are paid in cash. These activities and additional information on cash receipts and payments are presented in the Statement of Cash Flows.

Accounting practices that do not affect the reporting of activities on a cash basis include carrying investments at fair value and amortizing premiums or discounts on debt obligations.

**Dividends and Distributions to Shareholders** 

Dividends from net investment income are declared and paid monthly. The Fund may at times pay out less than the entire amount of net investment income earned in any particular period and may at times pay out such accumulated undistributed income earned in other periods in order to permit the Fund to have a more stable level of distribution. The capital gains realized by the Fund, if any, may be retained by the Fund, as permitted by the Puerto Rico Internal Revenue Code of 2011, as amended, unless the Fund's Board, acting through the Dividend Committee, determines that the net capital gains will also be distributed. The Fund records dividends on the ex-dividend date.

**Reverse Repurchase Agreements** 

Under these agreements, the Fund sells portfolio securities, receives cash in exchange, and agrees to repurchase the securities at a mutually agreed upon date and price. Ordinarily, those counterparties with which the Fund enters into these agreements require delivery of collateral, nevertheless, the Fund retains effective control over such collateral through the agreement to repurchase the collateral on or by the maturity of the reverse repurchase agreement. These transactions are treated as financings and recorded as liabilities. Therefore, no gain or loss is recognized on the transaction, and the securities pledged as collateral remain recorded as assets of the Fund. The Fund enters into reverse repurchase agreements that do not have third-party custodians, with the collateral delivered directly to the counterparty. Pursuant to the terms of the standard Securities Industry and Financial Markets Association ("SIFMA") Master Repurchase Agreement, the counterparty is free to repledge or rehypothecate the collateral, provided it is delivered to the Fund upon maturity of the reverse repurchase agreement. This arrangement allows the Fund to receive better interest rates and pricing on the reverse repurchase agreements. While the Fund cannot monitor the rehypothecation of collateral, it does monitor the market value of the collateral versus the repurchase amount, that the income from the collateral is paid to the Fund on a timely basis, and that the collateral is returned at the end of the reverse repurchase agreement. These agreements involve the risk that the market value of the securities purchased with the proceeds from the sale of securities received by the Fund may decline below the price of the securities that the Fund is obligated to repurchase, and that the value of the collateral posted by the Fund increases in value and the counterparty does not return it. Because the Fund borrows under reverse repurchase agreements based on the estimated fair value of the pledged assets, the Fund's ongoing ability to borrow under its reverse repurchase facilities may be limited, and its lenders may initiate margin calls in the event of adverse changes in the market. A

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

decrease in market value of the pledged assets may require the Fund to post additional collateral or otherwise sell assets at a time when it may not be in the best interest of the Fund to do so.

**Short-Term and Medium-Term Notes** 

The Fund has a short- and medium-term notes payable program as a funding vehicle to increase the amounts available for investments. The short- and medium-term notes may be issued from time to time in denominations of $1,000 or as may otherwise be specified in a supplement to the registration statements. The notes are collateralized by the pledge of certain securities of the Fund. The pledged securities are held by UBSTC, as agent for the Fund, for the benefit of the holders of the notes. The Fund suspended the current offerings of its securities, including notes, pending the registration of its securities under the 1933 Act, absent an available exception. There were no short- or medium-term notes outstanding as of March 31, 2026.

**Preferred Shares** 

Pursuant to the Fund's Certificate of Incorporation, as amended and supplemented, the Fund's Board is authorized to issue up to 12,000,000 preferred shares with a par value of $25, in one or more series. During the period from October 1, 2025, to March 31, 2026, no preferred shares were issued or outstanding.

**Operating Segments** 

An operating segment is defined in Topic 280 as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the public entity's chief operating decision maker ("CODM") to make decisions about resources to be allocated to the segment and asses its performance, and has discrete financial information available. The Asset Liability Committee (ALCO) of the Fund's Investment Adviser acts as the Fund's CODM. Since its commencement, the Fund operates and is managed as a single operating segment, as the CODM monitors the operating results of the Fund as a whole and the Fund's long-term strategic portfolio allocation is pre-determined in accordance with the term of its prospectus, based on a defined investment strategy which is executed by the Fund's portfolio managers as a team.

The financial information in the form of the Fund's portfolio investments, geographic allocation, leverage, net investment income, total return, expense ratio and changes in net assets resulting from operations, which are used by the CODM to assess the segment's performance versus the Fund's comparative benchmark and to make resource allocation decisions for the Fund's single segment is consistent with that presented within the Fund's Financial Statements. The Accounting policies of the Fund are consistent with those described in these Notes to Financial Statement. Segment assets are reflected on the accompanying Statements of Assets and Liabilities as "total assets" and significant segment expenses are listed on the accompanying Statement of Operations.

**Other** 

Security transactions are accounted for on trade date (the date on which the order to buy or sell is executed). Realized gains and losses on security transactions are determined on the identified cost method. Premiums and discounts on securities purchased are amortized using the interest method over the life or the expected life of the respective securities. Premiums are amortized at the earliest call date for any applicable securities. Income from interest and dividends from cumulative preferred shares is accrued, except when collection is not expected.

**2.** **Investment Advisory, Administration, Custody, and Transfer Agency Agreements and Other Transactions with Affiliates** 

Pursuant to an investment advisory contract (the "Advisory Agreement") with UBS Asset Managers of Puerto Rico, a division of UBSTC, and subject to the oversight of the Board, the Fund received investment advisory services in exchange for a fee. The investment advisory fee did not exceed 0.75%

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

of the Fund's average weekly gross assets (including assets purchased with the proceeds of leverage). For the period from October 1, 2025, to March 31, 2026, investment advisory fees amounted to $131,982. The Investment Advisor voluntarily waived investment advisory fees in the amount of $87,988, for a net fee of $43,994. The investment advisory fees payable amounted to $6,719 as of March 31, 2026.

UBSTC also provided administrative, custody, and transfer agency services pursuant to (i) Administration, (ii) Custody, and (iii) Transfer Agency, Registrar, and Shareholder Servicing Agreements, respectively. UBSTC had engaged JP Morgan Chase Bank, N.A. to act as the sub-custodian for the Fund. UBSTC provided facilities and personnel to the Fund for the performance of its administration duties. The Administration Agreement and the Transfer Agency, Registrar, and Shareholder Servicing Agreement fees did not exceed 0.15% and 0.05%, respectively of the Fund's average weekly gross assets. The Custody fees were solely sub-custodian costs and out-of-pocket expense reimbursements. For the period from October 1, 2025, to March 31, 2026, the administrative, custody, and transfer agency services fee amounted to $37,018. The administrator, custodian, and transfer agent voluntarily waived service fees in the amount of $8,951, for a net fee of $28,067. The administrative, custody, and transfer agent fees payable amounted to $4,352 as of March 31, 2026.

The six independent directors of the Fund's Board are paid based upon an agreed fee of $1,000 per fund for each quarterly Board meeting, $500 for each special Board meeting, and $500 per fund for each Audit Committee meeting. For the period from October 1, 2025, to March 31, 2026, the independent directors of the Fund were paid an aggregate compensation of $15,909. The Directors fees payable amounted to $5,967 as of March 31, 2026.

**3.** **Capital Share Transactions** 

The Fund is authorized to issue up to 88,000,000 common shares, par value $0.01 per share.

Capital share transactions for the period from October 1, 2025, to March 31, 2026, and for the fiscal year ended September 30, 2025, were as follows:

---

| | | |
|:---|:---|:---|
| **Common Shares** | **March 31, 2026** | **September 30, 2025** |
|  Proceeds from the reinvestment of dividends | $12917 | $29926 |
|  Repurchase of shares |  |  |
|  | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12917 | $29926 |

---

Transactions in common shares for the period from October 1, 2025, to March 31, 2026, and for the fiscal year ended September 30, 2025, were as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Common shares** | **March 31, 2026** | **March 31, 2026** | **September 30, 2025** | **September 30, 2025** |
|  Common shares - beginning of period |  | 10679810 |  | 10668801 |
|  Shares repurchased |  |  |  |  |
|  Shares issued due to the reinvestment of dividends |  | 4703 |  | 11009 |
|  Common shares- end of period |  | 10684513 |  | 10679810 |

---

There were no share repurchase transactions for the period from October 1, 2025, to March 31, 2026, and for the fiscal year ended September 30, 2025.

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

**4.** **Investment Transactions** 

The cost of U.S. obligations securities purchased was $3,606,158 for the period from October 1, 2025, to March 31, 2026, which were related to short-term securities. Proceeds from calls and maturities of U.S. obligations securities for the period from October 1, 2025, to March 31, 2026, amounted to $10,768,337, which $3,609,000 were related to maturities of short-term securities.

There were no affiliates transactions during the period from October 1, 2025, to March 31, 2026.

As part of its investment policies, the Fund was authorized to invest up to 45% of its total assets in mortgage instruments consisting of whole residential non-conforming mortgage loans (the "Mortgage Loans"), securities issued by grantor trusts in connection with pooled mortgage loans (the "Units"), and participation certificates in pools or mortgage loans "Participation Certificates", all such mortgage loans being originated or acquired by R-G Premier Bank of Puerto Rico ("R-G Premier") or any of its affiliates. These Mortgage Loans were serviced by R&G Mortgage Corporation ("R&G Mortgage"), and the payments of principal and interest thereon was (i) advanced to the Fund by R&G Mortgage pursuant to the terms and conditions of certain servicing agreements and (ii) guaranteed by R&G Financial Corporation "R&G Financial". The Fund ultimately bore the risk of credit loss upon the foreclosure and sale of any such mortgage loan.

On April 30, 2010, the Office of the Commissioner of Financial Institutions "OCFI" and the Federal Deposit Insurance Corporation ("FDIC") took over R-G Premier and sold its assets to Scotiabank de Puerto Rico pursuant to a certain purchase and assumption agreement. Subsequently, the FDIC requested the transfer of the servicing functions to another party, and effective November 1, 2010, the servicing of such mortgage loans was transferred to Banco Popular de Puerto Rico. The new servicer services the mortgage loans on an actual/actual remittance basis, net of any advances and compensation due to the servicer and is not required to advance principal and interest thereon.

At March 31, 2026, the Fund had $830,334 of Units or principal amount outstanding issued under certain grantor trusts secured by fixed rate non-conforming mortgage loans acquired from R&G Mortgage in fiscal year 2005. The Fund owns 100% of the beneficial interest in those grantor trusts and thus owns 100% of the underlying whole mortgages of each of the trusts. Such Units have a fair value of $652,295, which represents 2.24% of the net assets applicable to common shareholders at March 31, 2026. The Mortgage Loans underlying these trust securities did not conform at the time of purchase to the guidelines established by the Federal National Mortgage Association ("FNMA") or Federal Home Loan Mortgage Corporation ("FHLMC").

R&G Financial Corporation Non-Conforming Mortgage Loans Trust securities principal outstanding amount, fair value, and interest income as of March 31, 2026, and September 30, 2025, were as follows:

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
|  | **March 31, 2026** | **March 31, 2026** | **March 31, 2026** | **September 30, 2025** | **September 30, 2025** | **September 30, 2025** |
|  | **Principal<br>Outstanding<br>Amount** | **Fair Value** | **Interest<br>Income** | **Principal<br>Outstanding<br>Amount** | **Fair Value** | **Interest<br>Income** |
|  R&G Financial Corporation Non-Conforming Mortgage Loans | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;830334 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;652295 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21842 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;849118 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;667041 | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;48476 |

---

The principal balance of assets of the grantor trust will decrease over time, in large part due to prepayment and foreclosure on the Mortgage Loans. At this time, the remaining mortgages cannot be sold to FNMA or FHLMC and are expected to be held by the Fund until maturity, foreclosure or sale. The trusts include a mechanism whereby Mortgage Loans owned by the trusts that become conforming loans are distributed to the Fund, in order for the Fund to sell or otherwise transfer them to FNMA or FHLMC and maximize their value for the Fund.

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**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

**5.** **Securities Sold Under Reverse Repurchase Agreements** 

The Fund may enter into reverse repurchase agreements that do not have third-party custodians, with the collateral delivered directly to the counterparty. Pursuant to the terms of the standard SIFMA Master Repurchase Agreement, the counterparty is free to repledge or rehypothecate the collateral, provided it is delivered to the Fund upon maturity of the reverse repurchase agreement. This arrangement allows the Fund to receive better interest rates and pricing on the reverse repurchase agreements. While the Fund cannot monitor the rehypothecation of collateral, it does monitor the market value of the collateral versus the repurchase amount, that the income from the collateral is paid to the Fund on a timely basis, and that the collateral is returned at the end of the reverse repurchase agreement.

Securities sold under reverse repurchase agreements amounted to $2,325,000 at March 31, 2026, and related information is as follows:

---

| | |
|:---|:---|
|  Weighted average interest rate at the end of the period | 3.88% |
|  Maximum aggregate balance outstanding at any time of the period | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9650000 |
|  Average balance outstanding during the period | $6081044 |
|  Average interest rate during the period | 4.17% |

---

At March 31, 2026, the interest rate on securities sold under reverse repurchase agreements was

3.88% with a maturity date up to April 7, 2026.

At March 31, 2026, investment securities amounting to $2,510,985 were pledged as collateral for securities sold under reverse repurchase agreements. Interest payable on securities sold under reverse repurchase agreements amounted to $3,508 at March 31, 2026.

The total amount of unaffiliated originations or proceeds of securities sold under reverse repurchase agreements during the period from October 1, 2025, to March 31, 2026, amounted to $35,475,000.

The following table presents the Fund's reverse repurchase agreements by counterparty and the related collateral pledged by the Fund at March 31, 2026:

---

| | | | | |
|:---|:---|:---|:---|:---|
| Counterparty | Gross Amount of<br>Securities Sold<br>Under Reverse<br>Repurchase<br>Agreements<br>Presented in the<br>Statement of Assets<br>and Liabilities | Securities Sold<br>Under Reverse<br>Repurchase<br>Agreements Available<br>for Offset | Collateral Posted (a) | Net Amount due to Counterparty <br>(not less than zero) |
|  Santander US Capital Markets, New York | $2325000 | $- | $2325000 | $- |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Collateral received or posted is limited to the net securities sold under reverse repurchase agreements liability amounts. See above for actual collateral received and posted.

**6.** **Short-Term Financial Instruments** 

The fair value of short-term financial instruments, which includes $2,325,000 of securities sold under reverse repurchase agreements, are substantially the same as the carrying amount reflected in the Statement of Assets and Liabilities as these are reasonable estimates of fair values given the relatively

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

short period of time between origination of the instrument and their expected realization. The securities sold under reverse repurchase agreements are classified as Level 2.

**7.** **Concentration of Credit Risk** 

Concentration of credit risk that arises from financial instruments exists for groups of customers or counterparties when they have similar economic characteristics that would cause their ability to meet contractual obligations to be similarly affected by changes in economic or other conditions.

The major concentration of credit risk arises from the Fund's investment securities in relation to the location of the issuers of such investment securities. For calculating concentration, all securities guaranteed by the U.S. government or any of its subdivisions are excluded. At March 31, 2026, the Fund had investments with an aggregate fair value of approximately $3,979,352, which were issued by entities located in Puerto Rico and are not guaranteed by the U.S. government or any of its subdivisions, of which $3,457,828 are revenue bonds not guaranteed by the Commonwealth of Puerto Rico. In addition, at March 31, 2026, the Fund had investments in Puerto Rico mortgage loans with an aggregate market value amounting to $652,295 which were issued by one private issuer located in Puerto Rico and not guaranteed by the Commonwealth of Puerto Rico, and investments in Puerto Rico mortgage loans with an aggregate market value amounting to $28,916 which were issued by Credit Suisse and not guaranteed by the U.S. government. Also, at March 31, 2026, the Fund had investments with an aggregate market value amounting to $1,151,950 which were issued by one municipality located in the United States and not guaranteed by the U.S. government.

**8.** **Investment and Other Requirements and Limitations** 

The Fund is subject to certain requirements and limitations related to investments and leverage. Some of these requirements and limitations are imposed by statute or by regulation, while others are imposed by procedures established by the Board. The most significant requirements and limitations are discussed below.

The Fund invests up to 67% of the Fund's total assets in taxable and tax-exempt securities issued by Puerto Rico issuers, including securities by the Commonwealth of Puerto Rico and its political subdivisions and instrumentalities, mortgage-backed and asset-backed securities, and corporate obligations and preferred stock (the "67% Investment Requirement"). While the Fund intends to comply with the 67% Investment Requirement as market conditions permit, the Fund's ability to procure sufficient Puerto Rico securities which meet the Fund's investment criteria may, in the opinion of the Investment Adviser, be constrained due to the volatility affecting the Puerto Rico bond market since 2013 and the fact that the Puerto Rico government remains in the process of restructuring its outstanding debt under Title III of the Puerto Rico Oversight, Management, and Economic Stability Act ("PROMESA") as well as undertaking other fiscal measures to stabilize Puerto Rico's economy in accordance with the requirements of PROMESA, and this inability may continue for an indeterminate period of time. To the extent that the Fund is unable to procure sufficient amounts of such Puerto Rico securities, the Fund may acquire investments in securities of non-Puerto Rico issuers which satisfy the Fund's investment policies. While the Fund will seek to invest at least an average of 20% of its total assets on an annual basis in Puerto Rico securities even in adverse market conditions, there is no guarantee that it will be able to do so if there are insufficient Puerto Rico securities which meet the Fund's investment criteria.

The Fund invests, except where the Fund is unable to procure sufficient Puerto Rico Securities that meet the Fund's investment criteria, in the opinion of the Investment Adviser, or other extraordinary circumstances, up to 33% of its total assets in securities issued by non-Puerto Rico entities. These include securities issued or guaranteed by the U.S. government, its agencies and instrumentalities,

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

non-Puerto Rico mortgage-backed and asset-backed securities, corporate obligations and preferred stock of non-Puerto Rico entities, municipal securities of issuers within the U.S., and other non-Puerto Rico securities that the Investment Adviser may select, consistent with the Fund's investment objectives and policies.

As its fundamental policy, the Fund may not (i) issue senior securities, as defined in the 1940 Act, except to the extent permitted under the 1940 Act and except as otherwise described in the prospectus, or (ii) borrow money from banks or other entities, in excess of 33 1/3% of its total assets (including the amount of borrowings and debt securities issued); except that, the Fund may borrow from banks or other financial institutions for temporary or emergency purposes (including, among others, financing repurchases of notes and tender offers), in an amount of up to an additional 5% of its total assets.

The Fund may issue preferred stock, debt securities, and other forms of leverage to the extent that immediately after their issuance, the value of the Fund's total assets less all the Fund's liabilities and indebtedness which are not represented by preferred stock, debt securities, or other forms of leverage being issued or already outstanding, is equal to or greater than 300% of the aggregate par value of all outstanding preferred stock (not including any accumulated dividends or other distributions attributable to such preferred stock) and the total amount outstanding of debt securities and other forms of leverage.

**9.** **Tax Basis of Distributions and Components of Distributable Earnings (Accumulated Losses)** 

The amount of net unrealized appreciation/(depreciation) and the cost of investment securities for tax purposes was as follows:

---

| | |
|:---|:---|
|  Cost of investments for tax purposes | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;32333412 |
|  Gross appreciation | 255024 |
|  Gross depreciation | (1590209) |
|  Net appreciation (depreciation) | $(1335185) |

---

The Fund's policy, as stated in its prospectus, is to distribute substantially all net investment income. In order to maintain a stable level of dividends, however, the Fund may at times pay more or less than the net investment income earned in a particular year.

For the period from October 1, 2025, to March 31, 2026, and for the fiscal year ended September 30, 2025, the Fund had distributed from ordinary income $560,834 and $111,948 for tax purposes, respectively. The undistributed net investment income at March 31, 2026, and September 30, 2025, was as follows:

**2026:** 

---

| | |
|:---|:---|
|  Undistributed net investment income for tax purposes at the beginning of the period | $1074734 |
| Net investment income for tax purposes | 513427 |
| Dividends paid to common shareholders | (560834) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Undistributed net investment income for tax purposes at the end of the period | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1027327 |

---

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

**2025:** 

---

| | |
|:---|:---|
|  Undistributed net investment income for tax purposes at the beginning of the fiscal year | $1069243 |
| Net investment income for tax purposes | 117439 |
| Dividends paid to common shareholders | (111948) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Undistributed net investment income for tax purposes at the end of the fiscal year | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1074734 |

---

The undistributed net investment income and components of total distributable earnings (accumulated losses) on a tax basis at March 31, 2026, were as follows:

---

| | |
|:---|:---|
|  Undistributed net investment income for tax purposes at the end of the period | $1027327 |
| Accumulated net realized loss from investment | (104984847) |
| Unrealized net appreciation from investment | (1335185) |
|  Total Distributable Earnings (Accumulated Loss) | $(105292705) |

---

**10.** **Risks and Uncertainties** 

The Fund is exposed to various types of risks, such as geographic concentration, industry concentration, non-diversification, interest rate, and credit risks, among others. This list is qualified in its entirely by reference to the more detailed information provided in the offering documentation for securities issued by the Fund.

*Puerto Rico Risk.* The Fund invests in securities of Puerto Rico issuers. Consequently, the Fund generally is more susceptible to economic, political, regulatory, or other factors adversely affecting issuers in Puerto Rico than an investment company that is not so concentrated in Puerto Rico issuers. In addition, securities issued by the Puerto Rico government or its instrumentalities are affected by the central government's finances. That includes, but is not limited to, general obligations of Puerto Rico and revenue bonds, special tax bonds, or agency bonds. Over the past few years, many Puerto Rico government bonds as well as the securities issued by several Puerto Rico financial institutions have been downgraded as a result of several factors, including, without limitation, the downturn experienced by the Puerto Rico economy and the strained financial condition of the Puerto Rico government.

*Conflicts of Interest.* The investment advisory fee payable to the Investment Adviser during periods in which the Fund is utilizing leverage will be higher than when it is not doing so because the fee is calculated as a percentage of average weekly gross assets, including assets purchased with leverage. Because the asset base used for calculating the investment advisory fee is not reduced by aggregate indebtedness incurred in leveraging the Fund, the Investment Adviser may have a conflict of interest in formulating a recommendation to the Fund as to whether and to what extent to use leverage. This could impact the Fund's ability to pay in the future.

UBS Asset Managers of Puerto Rico, UBS Financial Services Inc. ("UBSFS"), and their affiliates have engaged and may engage in business transactions with or related to any one of the issuers of the Fund's investment assets, or with competitors of such issuers, as well as provide them with investment banking, asset management, trust, or advisory services, including merger and acquisition advisory services. These activities may present a conflict between any such affiliated party and the interests of the Fund. Any such affiliated party may also publish or may have published research reports on one

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

or more of such issuers and may have expressed opinions or provided recommendations inconsistent with the purchasing or holding of the securities of such issuers. While the Fund has engaged in transactions with affiliates in the past, all transactions among Fund affiliates from the date of the Fund's registration under the 1940 Act going forward will be done in compliance with the 1940 Act rules and prohibitions regarding affiliated transactions, or any exemptive relief granted by the U.S. Securities and Exchange Commission (the "SEC") in respect thereof.

*Investment and Market Risk*. The Fund's investments may be adversely affected by the performance of U.S. and Puerto Rico investment securities markets, which, in turn, may be influenced by a number of factors, including, among other things, (i) the level of interest rates, (ii) the rate of inflation, (iii) political decisions, (iv) fiscal policy, and (v) current events in general. Because the Fund invests in investment securities, the Fund's NAV may fluctuate due to market conditions.

Puerto Rico and other countries and regions in which the Fund may invest where the Investment Adviser has offices or where the Fund or the Investment Adviser otherwise do business are susceptible to natural disasters (e.g., fire, flood, earthquake, storm, and hurricane), epidemics/pandemics, or other outbreaks of serious contagious diseases. The occurrence of a natural disaster or epidemic/pandemic could, directly or indirectly, adversely affect and severely disrupt the business operations, economies, and financial markets of many countries (even beyond the site of the natural disaster or epidemic/pandemic) and could adversely affect the Fund's investment program or the Investment Adviser's ability to do business. In addition, terrorist attacks, or the fear of or the precautions taken in anticipation of such attacks could, directly or indirectly, materially and adversely affect certain industries in which the Fund invests or could affect the countries and regions in which the Fund invests, where the Investment Adviser has offices or where the Fund or the Investment Adviser otherwise do business. Other acts of war (e.g., invasion, acts of foreign enemies, hostilities, and insurrection, regardless of whether war is declared) could also have a material adverse impact on the financial condition of industries or countries in which the Fund invests.

In addition, turbulence in financial markets and reduced liquidity in equity and/or fixed-income markets may negatively affect the Fund. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region, or financial market may adversely impact issuers in a different country, region, or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain and could affect companies worldwide. An outbreak of an infectious disease or serious environmental or public health concern could have a significant negative impact on economic and market conditions, could exacerbate pre-existing political, social, and economic risks in certain countries or regions, and could trigger a prolonged period of global economic slowdown, which may impact the Fund. To the extent the Fund is overweight in certain countries, regions, companies, industries, or market sectors, such positions will increase the risk of loss from adverse developments affecting those countries, regions, companies, industries, or sectors.

*Credit Risk*. Credit risk is the risk that debt securities or preferred stock will decline in price or fail to make dividend or interest payments when due because the issuer of the security experiences a decline in its financial condition or it otherwise decides to suspend, delay, or reduce payments. The Fund's investments are subject to credit risk. The risk is greater in the case of securities that are rated below investment grade or rated in the lowest investment grade category.

*Fixed Income Securities Generally*. The yield on fixed income securities that the Fund may invest in depends on a variety of factors, including general market conditions for such securities, the financial condition of the issuer, the size of the particular offering, the maturity, credit quality, and rating of the security. Generally, the longer the maturity of those securities, the higher its yield and the greater the changes in its yields both up and down. The market value of fixed income securities normally will vary

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

inversely with changes in interest rates. The unique characteristics of certain types of securities also may make them more sensitive to changes in interest rates.

Certain issuers of fixed income securities are subject to the provisions of bankruptcy, insolvency, and other laws affecting the rights and remedies of creditors that may result in delays and costs to the Fund if a party becomes insolvent. It is also possible that, as a result of litigation or other conditions, the power or ability of such issuers to meet their obligations for the repayment of principal and payment of interest, respectively, may be materially and adversely affected.

*Municipal Obligations Risk*. Certain of the municipal obligations in which the Fund may invest present their own distinct risks. These risks may depend, among other things, on the financial situation of the government issuer, or in the case of industrial development bonds and similar securities, on that of the entity supplying the revenues that are intended to repay the obligations. It is also possible that, as a result of litigation or other conditions, the power or ability of issuers or those other entities to meet their obligations for the repayment of principal and payment of interest may be materially and adversely affected. See "Puerto Rico Risk" above.

*Mortgage-Backed Securities Risk*. Mortgage-backed securities (residential and commercial) represent interests in "pools' of mortgages. Mortgage-backed securities have many of the risks of traditional debt securities but, in general, differ from investments in traditional debt securities in that, among other things, principal may be prepaid at any time due to prepayments by the obligors on the underlying obligations. As a result, the Fund may receive principal repayments on these securities earlier or later than anticipated by the Fund. In the event of prepayments that are received earlier than anticipated, the Fund may be required to reinvest such prepayments at rates that are lower than the anticipated yield of the prepaid obligation. The rate of prepayments is influenced by a variety of economic, geographic, demographic, and other factors, including, among others, prevailing mortgage interest rates, local and regional economic conditions, and homeowner mobility. Generally, prepayments will increase during periods of declining interest rates and decrease during periods of rising interest rates. The decrease in the rate of prepayments during periods of rising interest rates results in the extension of the duration of mortgage-backed securities, which makes them more sensitive to changes in interest rates and more likely to decline in value (this is known as extension risk). Since a substantial portion of the assets of the Fund may be invested in mortgage-backed securities, the Fund may be subject to these risks and other risks related to such securities to a significant degree, which might cause the market value of the Fund's investments to fluctuate more than otherwise would be the case. In addition, mortgage-backed or other securities issued or guaranteed by FNMA, FHLMC or a Federal Home Loan Bank are supported only by the credit of these entities and are not supported by the full faith and credit of the U.S. government.

*Concentration Risk*. The Fund may concentrate its investments in mortgage-related assets, which means that its performance may be closely tied to the performance of a particular market segment. The Fund's concentration in these securities may present more risks than if it were broadly diversified over numerous industries and sectors of the economy. A downturn in these securities would have a larger impact on the Fund than on a fund that does not concentrate in such securities. At times, the performance of these securities will lag the performance of other industries or the broader market as a whole.

*Illiquid Securities*. Illiquid securities are securities that cannot be sold within a reasonable period of time, not to exceed seven days, in the ordinary course of business at approximately the amount at which the Fund has valued the securities. There presently are a limited number of participants in the market for certain Puerto Rico securities or other securities or assets that the Fund may own. That and other factors may cause certain securities to have periods of illiquidity. Illiquid securities include, among other things, securities subject to legal or contractual restrictions on resale that hinder the

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

marketability of the securities. Certain of the securities in which the Fund intends to invest, such as shares of preferred stock, may be substantially less liquid than other types of securities in which the Fund may invest. Illiquid securities may trade at a discount from comparable, more liquid investments.

There are no limitations on the Fund's investment in illiquid securities. The Fund may also continue to hold, without limitation, securities or other assets that become illiquid after the Fund invests in them. To the extent the Fund owns illiquid securities or other illiquid assets, the Fund may not be able to sell them easily, particularly at a time when it is advisable to do so to avoid losses.

*Valuation Risk*. The price the Fund could receive upon the sale of any particular investment may differ from the Fund's valuation of the investment, particularly for securities that trade in thin or volatile markets, including Puerto Rico, or that are valued using a fair valuation methodology or a price provided by an independent pricing service. As a result, the price received upon the sale of an investment may be less than the value ascribed by the Fund, and the Fund could realize a greater than expected loss or lesser than expected gain upon the sale of the investment. Pricing services that value fixed-income securities generally utilize a range of market-based and security-specific inputs and assumptions, as well as considerations about general market conditions, to establish a price. Pricing services generally value fixed-income securities assuming orderly transactions of an institutional round lot size, but such securities may be held or transactions may be conducted in smaller, odd lot sizes. Odd lots may trade at lower prices than institutional round lots. The Fund's ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.

*Interest Rate Risk.* Interest rate risk is the risk that interest rates will rise so that the value of the securities issued by the Fund or the Fund's portfolio investments will fall. Also, the Fund's yield will tend to lag behind changes in prevailing short-term interest rates. In addition, during periods of rising interest rates, the average life of certain types of securities may be extended because of the right of the issuer to defer payments or make slower than expected principal payments. This may lock in a below market interest rate, increase the security's duration (the estimated period until the security is paid in full), and reduce the value of the security. This is known as extension risk. The Fund is subject to extension risk. Conversely, during periods of declining interest rates, the issuer of a security may exercise its option to prepay principal earlier than scheduled in order to refinance at lower interest rates, forcing the Fund to reinvest in lower yielding securities. This is known as prepayment risk. Prepayment risk applies also to the securities issued by the Fund to the extent they are redeemable by the Fund. The Fund is subject to prepayment risk. This tendency of issuers to refinance debt with high interest rates during periods of declining interest rates may reduce the positive effect of declining interest rates on the market value of the Fund's securities. Finally, the Fund's use of leverage by the issuance of preferred stock, debt securities, and other instruments may increase the risks described above.

*Leverage Risk*. Some transactions may give rise to a form of economic leverage. These transactions may include, among others, derivatives, and may expose the Fund to greater risk and increase its costs. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet applicable requirements of the 1940 Act and the rules thereunder. Increases and decreases in the value of the Fund's portfolio will be magnified when the Fund uses leverage.

*Risks of Reverse Repurchase Agreements.* The Fund may engage in reverse repurchase agreements which are collateralized loan transactions in which the Fund sells a portfolio security to a counterparty in exchange for cash and agrees to buy it back at a specified time and price in a specified currency. The counterparty can repledge or rehypothecate the collateral securities to a third party, provided they are delivered to the Fund upon maturity of the reverse repurchase agreement. Reverse repurchase

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

agreements involve various risks to the Fund. Reverse repurchase agreements are subject to counterparty risk that the buyer of the securities sold by the Fund, or the counterparty to which the buyer rehypothecates the collateral securities may be unable to deliver the securities at the agreed upon terms when the Fund seeks to repurchase the collateral. In that case, the Fund may be unable to purchase the securities on the open market or only at a higher cost, possibly resulting in an investment loss to the Fund. The collateral securities in the reverse repurchase agreement are also subject to market risk. An increase in interest rates that causes a decrease in the market value of the securities can lead the lenders to require the Fund to post additional collateral at a time when it may not be in the best interest of the Fund to do so.

*Special Risks of Hedging Strategies*. The Fund may use a variety of derivatives instruments including securities options, financials futures contracts, options on futures contracts, and other interest rate protection transactions such as swap agreements, to attempt to hedge its portfolio of assets and enhance its return. In particular, the Fund generally uses derivative instruments to hedge against variations in the borrowing cost of the Fund's leverage program. Successful use of most derivatives instruments depends upon the Investment Adviser's ability to predict movements of the overall securities and interest rate markets. There is no assurance that any particular hedging strategy adopted will succeed or that the Fund will employ such strategy with respect to all or any portion of its portfolio. Some of the derivative strategies that the Fund may use to enhance its return are riskier than its hedging transactions and have speculative characteristics. Such strategies do not attempt to limit the Fund's risk of loss.

**11.** **Commitments and Contingencies** 

The Fund, its Board, UBSFS, and UBSTC are subject to legal proceedings, claims, and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, management does not expect that the ultimate outcome of these matters will have a material adverse effect on the Fund's financial position, results of operations, or cash flows. Management of UBSFS and UBSTC have informed the Fund of its belief that the resolution of such matters is not likely to have a material adverse effect on the ability of UBS Asset Managers of Puerto Rico and UBSTC to perform under their respective contracts with the Fund.

**12.** **Indemnifications** 

In the normal course of business, the Fund enters into contracts that contain a variety of indemnification clauses. The Fund's maximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses for indemnification and expects the risk of loss to be remote.

**13.** **Subsequent Events** 

Events and transactions from April 1, 2026, through May 27, 2026 (the date the financial statements were available to be issued), have been evaluated by management for subsequent events. Management has determined that there were no material events that would require adjustment to or additional disclosure in the Fund's financial statements through this date, except as disclosed below.

*<u>Service Providers:</u>*

Effective May 11, 2026, the Fund entered into a Master Custodian Agreement and an Administration Agreement with State Street Bank and Trust Company to provide custody and fund administration services to the Fund, respectively. On May 11, 2026, UBSTC will no longer be Custodian, JP Morgan

------

**US Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc.** 

**Notes to Financial Statements** 

**For the period from October 1, 2025, to March 31, 2026 (Unaudited)** 

Chase Bank, N.A. will no longer be sub-custodian and UBS TC will no longer be fund administrator to the Fund.

*<u>Dividends:</u>*

On April 30, 2026, the Board, acting through the Dividend Committee, declared an ordinary net investment income dividend of $0.00875 per common share, totaling $93,496 and payable on May 11, 2026, to common shareholders of record as of April 30, 2026.

On May 20, 2026, the Board of the Fund issued a public announcement regarding their ongoing review of options to provide better liquidity, value and operational efficiencies for the Fund's shareholders. The evaluation is ongoing, and any proposed transaction would be subject to Board approval, regulatory requirements, and shareholder approval.

------

## OTHER INFORMATION (Unaudited)
**Shareholder Meeting for the fiscal year ended September 30, 2025** 

The 2026 Annual Meeting of Shareholders was held on January 29, 2026 (the "2026 Annual Meeting"). The voting results for the proposals considered at the 2026 Annual Meeting were as follows:

1. Election of Directors. The stockholders of the Fund elected Messrs. Carlos Nido, Luis Pellot, Jorge Vallejo, and
Gabriel Pagán-Pedrero to the Board to serve for a term expiring on the date of which the annual meeting of stockholders is held in 2029, 2029, 2028, and 2027, respectively, or until their successors are
elected and qualified.

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; Name of Director | Votes cast "For" | Votes "Against/Withheld" |
| &nbsp;&nbsp;&nbsp; Carlos Nido | 6514454 | 1996827 |
| &nbsp;&nbsp;&nbsp; Gabriel Pagán- Pedrero | 6514454 | 1996827 |
| &nbsp;&nbsp;&nbsp; Luis Pellot | 6514454 | 1996827 |
| &nbsp;&nbsp;&nbsp; Jorge Vallejo | 6514454 | 1996827 |

---

------

**Statement Regarding Availability of Quarterly Portfolio Schedule.** 

Beginning October 31, 2025, the Fund will file its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The Fund's Form N-PORT reports will be available on the SEC'swebsiteat <u>http://www.sec.gov</u>. The quarterly schedule of portfolio holdings will be made available upon request by calling 787-250-3600.

------

**Statement Regarding Availability of Proxy Voting Policies and Procedures and Proxy Voting Record** 

A description of the Fund's policies and procedures that are used by the Investment Adviser to vote proxies relating to the Fund's portfolio securities and information regarding how the Investment Adviser voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 are available, without charge, upon request, by calling 787-250-3600 and on the SEC's website at http://www.sec.gov.

------

**Privacy Notice** 

The Fund is committed to protecting the personal information that it collects about individuals who are prospective, former, or current investors.

If you are located in a jurisdiction where specific laws, rules or regulations require the Fund to provide you with additional or different privacy-related rights beyond what is set forth below, then the Fund will comply with those specific laws, rules, or regulations.

The Fund collects personal information for business purposes to process requests and transactions and to provide customer service. Personal information is obtained from the following sources:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Investor applications and other forms,* 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Written and electronic correspondence,* 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Telephone contacts,* 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Account history* (including information about Fund transactions and balances in your accounts with the Distributor
or our affiliates, other fund holdings in the UBS family of funds, and any affiliation with the Distributor and its affiliates),

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Website visits,* 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● *Consumer reporting agencies* 

The Fund limits access to personal information to those employees who need to know that information in order to process transactions and service accounts. Employees are required to maintain and protect the confidentiality of personal information. The Fund maintains physical, electronic, and procedural safeguards to protect personal information.

The Fund may share personal information described above with their affiliates for business purposes, such as to facilitate the servicing of accounts. The Fund may share the personal information described above for business purposes with a non-affiliated third party only if the entity is under contract to perform transaction processing, servicing, or maintaining investor accounts on behalf of the Fund. The Fund may share personal information with its affiliates or other companies who are not affiliates of the Fund that perform marketing services on the Fund's behalf or to other financial institutions with whom it has marketing agreements for joint products or services. These companies are not permitted to use personal information for any purposes beyond the intended use (or as permitted by law). The Fund does not sell personal information to third parties for their independent use. The Fund may also disclose personal information to regulatory authorities or otherwise as permitted by law.

------

**<u>INVESTMENT ADVISER</u>**

**UBS Asset Managers of Puerto Rico,** 

*a division of UBS Trust Company of Puerto Rico* 

250 Muñoz Rivera Avenue, 10<sup>th</sup> Floor

San Juan, Puerto Rico 00918

**<u>TRANSFER AGENT</u>**

**UBS Trust Company of Puerto Rico** 

250 Muñoz Rivera Avenue, 10<sup>th</sup> Floor

San Juan, Puerto Rico 00918

**<u>ADMINISTRATOR AND CUSTODIAN</u>**

**State Street Bank and Trust Company** 

One Congress Street

Boston, Massachusetts 002114

**<u>U.S. LEGAL COUNSEL</u>**

**Sidley Austin LLP** 

787 Seventh Avenue

New York, New York 10019

**<u>PUERTO RICO LEGAL COUNSEL</u>**

**Sanchez/LRV LLC** 

270 Muñoz Rivera Avenue, Suite 1110

San Juan. Puerto Rico 00918

**<u>INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM</u>**

**Ernst & Young LLP** 

One Manhattan West,

395 9<sup>TH</sup> Ave.

New York, NY 10001

**<u>DIRECTORS AND OFFICERS</u>**

**Agustín Cabrer-Roig** 

Independent Director

**Carlos Nido** 

Independent Director

**Gabriel Pagán Pedrero** 

Independent Director

**Luis M. Pellot-González** 

Independent Director

**Clotilde Pérez** 

Independent Director

------

**Jorge I. Vallejo** 

Independent Director

**Carlos V. Ubiñas** 

Interested Director, Chairman of the Board and President

**José Grau** 

Treasurer

**Heydi Cuadrado** 

Assistant Treasurer and Vice President

**Edward Ramos** 

Vice President

**María Vilaro** 

Vice President

**Liana Loyola, Esq.** 

Secretary

**Luz Nereida Colón** 

Chief Compliance Officer

**Remember that:** 

● Mutual Fund's shares are not bank deposits or FDIC insured.

● Mutual Fund's shares are not obligations of or guaranteed by UBS Financial Services Inc. or any of its affiliates.

● Mutual Fund's shares are subject to investment risks, including possible loss of the principal amount invested.

------

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![LOGO](g160595g03g03.jpg)

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(b) Not applicable.

**Item 2. Code of Ethics.** 

Item applicable only to annual report on Form N-CSR.

**Item 3. Audit Committee Financial Expert.** 

Item applicable only to annual report on Form N-CSR.

**Item 4. Principal Accountant Fees and Services.** 

Item applicable only to annual report on Form N-CSR.

**Item 5. Audit Committee of Listed Registrants.** 

(a) Not applicable.

(b) Not applicable.

**Item 6. Investments.** 

(a) The Schedule of Investments is included as part of the report to shareholders included under Item 1(a) of this Form N-CSR.

(b) Not applicable.

**Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies** 

(a) Not applicable.

(b) Not applicable.

**Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies** 

Not applicable.

**Item 9. Proxy Disclosures for Open-End Management Investment Companies** 

Not applicable.

**Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies** 

Not applicable.

------

**Item 11. Statement Regarding Basis for Approval of Investment Advisory Contract** 

Not applicable.

**Item 12. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.** 

Item applicable only to annual report on Form N-CSR.

**Item 13. Portfolio Managers of Closed-End Management Investment Companies.** 

(a) Item applicable only to annual report on Form N-CSR.

(b) Not applicable.

**Item 14. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.** 

There were no repurchases of common shares by the U.S. Mortgage-Backed & Income Fund for Puerto Rico Residents, Inc. (the "Fund" or the "Registrant") for the period covered by this Form N-CSR filing.

**Item 15. Submission of Matters to a Vote of Security Holders.** 

There have not been any material changes to the procedures by which shareholders may recommend nominees to the Fund's Board of Directors (the "Board") during the period covered by this Form N-CSR filing.

**Item 16. Controls and Procedures.** 

(a) The Fund's principal executive and principal financial officers have concluded that the Fund's disclosure controls and procedures (as defined in Rule 30a-3(c) under the 1940 Act) are effective as of a date within 90 days of the filing date of this Form N-CSR based on their evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended.

(b) There were no changes in the Fund's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Fund's internal control over financial reporting.

**Item 17. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.** 

(a) Although it has not done so, the Fund may engage in securities lending, subject to procedures adopted by its Board.

(b) Not applicable.

------

**Item 18. Recovery of Erroneously Awarded Compensation** 

(a) Not applicable.

(b) Not applicable.

**Item 19. Exhibits.** 

---

| | |
|:---|:---|
| (a)(1) | &nbsp;&nbsp;&nbsp;&nbsp; Item applicable only to annual report on Form N-CSR. |
| (a)(2) | &nbsp;&nbsp;&nbsp;&nbsp; Not applicable. |
| (a)(3) | &nbsp;&nbsp;&nbsp;&nbsp; [The certifications of the Fund's principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 are filed herewith.](d160595dex99cert.htm) |
| (a)(4) | &nbsp;&nbsp;&nbsp;&nbsp; Not applicable. |
| (a)(5) | &nbsp;&nbsp;&nbsp;&nbsp; Not applicable. |
| (b) | &nbsp;&nbsp;&nbsp;&nbsp; [The certifications of the Fund's principal executive officer and principal financial officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 are filed herewith.](d160595dex99906cert.htm) |

---

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

**U.S. MORTGAGE-BACKED & INCOME FUND FOR PUERTO RICO RESIDENTS, INC.** 

---

| | |
|:---|:---|
|  By: | <u>/s/ Carlos V. Ubiñas</u> |
|  | Carlos V. Ubiñas |
|  | Principal Executive Officer |
| Date:  | June 5, 2026 |

---

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

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| | |
|:---|:---|
|  By: | <u>/s/ Carlos V. Ubiñas</u> |
|  | Carlos V. Ubiñas |
|  | Principal Executive Officer |
|  Date:  | June 5, 2026 |

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| | |
|:---|:---|
|  By: | <u>/s/ José Grau</u> |
|  | José Grau |
|  | Principal Financial Officer |
| Date:  | June 5, 2026 |

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## Ex-99.Cert

**Exhibit 19(a)(3)** 

**<u>CERTIFICATIONS</u>**

I, Carlos V. Ubiñas, certify that:

1. I have reviewed this report on Form N-CSR of U.S.
Mortgage-Backed & Income for Puerto Rico Residents, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state
a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report,
fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the Registrant as of, and for, the
periods presented in this report;

4. The Registrant's other certifying officer(s) and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the Registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be
designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is
being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Designed such internal control over financial reporting, or caused such internal control over financial
reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting
principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in
this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that
occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer(s) and I have disclosed to the Registrant's auditors
and the audit committee of the Registrant's board of directors (or persons performing the equivalent functions):

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) All significant deficiencies and material weaknesses in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize, and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Any fraud, whether or not material, that involves management or other employees who have a significant role
in the Registrant's internal control over financial reporting.

Date: June 5, 2026

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| | |
|:---|:---|
| By: | <u>/s/ Carlos V. Ubiñas</u> |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Carlos V. Ubiñas |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Principal Executive Officer |

---

------

I, José Grau, certify that:

1. I have reviewed this report on Form N-CSR of U.S.
Mortgage-Backed & Income for Puerto Rico Residents, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state
a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report,
fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the Registrant as of, and for, the
periods presented in this report;

4. The Registrant's other certifying officer(s) and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the Registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be
designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is
being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Designed such internal control over financial reporting, or caused such internal control over financial
reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting
principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in
this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that
occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer(s) and I have disclosed to the Registrant's auditors
and the audit committee of the Registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) All significant deficiencies and material weaknesses in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize, and report financial information; and

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Any fraud, whether or not material, that involves management or other employees who have a significant role
in the Registrant's internal control over financial reporting.

Date: June 5, 2026

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| | |
|:---|:---|
| By: | <u>/s/ José Grau</u> |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;José Grau |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Principal Financial Officer |

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## Exhibit 99.906

**Exhibit 19(b)** 

This certification is furnished pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. §1350, and accompanies the report on Form N-CSR for the period ended March 31, 2026 (the "Report"), of the U.S. Mortgage-Backed & Income for Puerto Rico Residents, Inc.

Carlos V. Ubiñas and José Grau, of U.S. Mortgage-Backed & Income for Puerto Rico Residents, Inc. each certify that:

1. This Form N-CSR filing for the Fund fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Fund.

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| | |
|:---|:---|
| By: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/<u>s/ Carlos V. Ubiñas</u> |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Carlos V. Ubiñas |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Principal Executive Officer |

---

---

| | |
|:---|:---|
| By: | <u>/s/ José Grau</u> |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;José Grau |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Principal Financial Officer |

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Date: June 5, 2026