# EDGAR Filing Document

**Accession Number:** 0001517518
**File Stem:** 0001752724-25-174672
**Filing Date:** 2025-7
**Character Count:** 10861
**Document Hash:** c33a991ea42363085ba689996c5f8bfd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-174672.hdr.sgml**: 20250723

**ACCESSION NUMBER**: 0001752724-25-174672

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250530

**FILED AS OF DATE**: 20250723

**DATE AS OF CHANGE**: 20250723

**PERIOD START**: 20251130

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ClearBridge Energy Midstream Opportunity Fund Inc.
- **CENTRAL INDEX KEY:** 0001517518

**ORGANIZATION NAME:**
- **EIN:** 451474578
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22546
- **FILM NUMBER:** 251142297

**BUSINESS ADDRESS:**
- **STREET 1:** 620 EIGHTH AVENUE
- **STREET 2:** 47TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018
- **BUSINESS PHONE:** 888-777-0102

**MAIL ADDRESS:**
- **STREET 1:** 620 EIGHTH AVENUE
- **STREET 2:** 47TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10018

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ClearBridge Energy MLP Opportunity Fund Inc.
- **DATE OF NAME CHANGE:** 20110406

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** ClearBridge Energy Midstream Opportunity Fund Inc.

- **b. Investment Company Act file number:** 811-22546

- **c. CIK number of Registrant:** 0001517518

- **d. LEI of Registrant:** 549300U6RAJWN6OONX12

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

  - **Street Address 1:** 620 Eighth Avenue

  - **City:** New York

  - **State:** NY

  - **Foreign country:** US

  - **Zip / Postal Code:** 10018

  - **Telephone number:** 1-888-777-0102

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

- **a. Name of Series:** ClearBridge Energy Midstream Opportunity Fund Inc.

- **c. LEI of Series:** 549300U6RAJWN6OONX12

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

- **a. Date of fiscal year-end:** 2025-11-30

- **b. Date as of which information is reported:** 2025-05-30

**Item A.4. Final filing**

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

### Fund Information

**Total Assets:** $1259224183.60

**Total Liabilities:** $355165930.68

**Net Assets:** $904058252.92

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000000000 | 1.23%                | -7.40%               | 2.42%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $14503018.32                               |
| Month 2  | $15260163.98             | $-141143644.80                             |
| Month 3  | $-4063228.00             | $9149842.82                                |

### Schedule of Portfolio Investments

| Name                                                   | Title                                                  | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Cheniere Energy Partners LP                            | Cheniere Energy Partners LP                            | CUSIP: 16411Q101<br>LEI: 5493005UEC8AZ34LDV29 | Long             | EC               | CORP              | US        |    493091 | NS      | $28288630.67  | 3.13%             |  |  |  | No            |                  1 | On Loan: No      |
| ONEOK INC                                              | ONEOK INC                                              | CUSIP: 682680103<br>LEI: 2T3D6M0JSY48PSZI1Q41 | Long             | EC               | CORP              | US        |   1173728 | NS      | $94884171.52  | 10.50%            |  |  |  | No            |                  1 | On Loan: No      |
| Plains GP Holdings LP                                  | Plains GP Holdings LP                                  | CUSIP: 72651A207<br>LEI: 549300O56BSKRD8FAM12 | Long             | EC               | CORP              | US        |   2614816 | NS      | $46020761.60  | 5.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Antero Midstream Corp                                  | Antero Midstream Corp                                  | CUSIP: 03676B102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |   3305098 | NS      | $62069740.44  | 6.87%             |  |  |  | No            |                  1 | On Loan: No      |
| TC Energy Corp                                         | TC Energy Corp                                         | CUSIP: 87807B107<br>LEI: 549300UGKOFV2IWJJG27 | Long             | EC               | CORP              | CA        |    855205 | NS      | $43307581.20  | 4.79%             |  |  |  | No            |                  1 | On Loan: No      |
| JPMorgan 100% US Treasury Securities Money Market Fund | JPMorgan 100% US Treasury Securities Money Market Fund | CUSIP: 4812A2835<br>LEI: 549300BS6M6EE7LNA816 | Long             | STIV             | RF                | US        | 115098105 | NS      | $115098105.27 | 12.73%            |  |  |  | No            |                  1 | On Loan: No      |
| Plains All American Pipeline L                         | Plains All American Pipeline LP                        | CUSIP: 726503105<br>LEI: 5521FA2ITF25TVH63740 | Long             | EC               | CORP              | US        |   2670671 | NS      | $44172898.34  | 4.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Kinder Morgan Inc                                      | Kinder Morgan Inc                                      | CUSIP: 49456B101<br>LEI: 549300WR7IX8XE0TBO16 | Long             | EC               | CORP              | US        |   2409800 | NS      | $67570792.00  | 7.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Genesis Energy LP                                      | Genesis Energy LP                                      | CUSIP: 371927104<br>LEI: 549300VJ5D6MDK138782 | Long             | EC               | CORP              | US        |   2897883 | NS      | $45699614.91  | 5.05%             |  |  |  | No            |                  1 | On Loan: No      |
| DT Midstream Inc                                       | DT Midstream Inc                                       | CUSIP: 23345M107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |    121300 | NS      | $12704962.00  | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |
| MPLX LP                                                | MPLX LP                                                | CUSIP: 55336V100<br>LEI: 5493000CZJ19CK4P3G36 | Long             | EC               | CORP              | US        |   1901431 | NS      | $96972981.00  | 10.73%            |  |  |  | No            |                  1 | On Loan: No      |
| Hess Midstream LP                                      | Hess Midstream LP                                      | CUSIP: 428103105<br>LEI: N/A                  | Long             | EC               | CORP              | US        |   1465985 | NS      | $54241445.00  | 6.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Enbridge Inc                                           | Enbridge Inc                                           | CUSIP: 29250N105<br>LEI: 98TPTUM4IVMFCZBCUR27 | Long             | EC               | CORP              | CA        |   1163734 | NS      | $54090356.32  | 5.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Delek Logistics Partners LP                            | Delek Logistics Partners LP                            | CUSIP: 24664T103<br>LEI: 549300UVYITDIU51P724 | Long             | EC               | CORP              | US        |    279818 | NS      | $11690796.04  | 1.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Western Midstream Partners LP                          | Western Midstream Partners LP                          | CUSIP: 958669103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |   2232943 | NS      | $83512068.20  | 9.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Sunoco LP                                              | Sunoco LP                                              | CUSIP: 86765K109<br>LEI: 54930001NJU8E40NQ561 | Long             | EC               | CORP              | US        |    409772 | NS      | $22103101.68  | 2.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Enterprise Products Partners L                         | Enterprise Products Partners LP                        | CUSIP: 293792107<br>LEI: K4CDIF4M54DJZ6TB4Q48 | Long             | EC               | CORP              | US        |   2258260 | NS      | $69599573.20  | 7.70%             |  |  |  | No            |                  1 | On Loan: No      |
| Williams Cos Inc/The                                   | Williams Cos Inc/The                                   | CUSIP: 969457100<br>LEI: D71FAKCBLFS2O0RBPG08 | Long             | EC               | CORP              | US        |   1275623 | NS      | $77187947.73  | 8.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Energy Transfer LP                                     | Energy Transfer LP                                     | CUSIP: 29273V100<br>LEI: MTLVN9N7JE8MIBIJ1H73 | Long             | EC               | CORP              | US        |   6623259 | NS      | $115774567.32 | 12.81%            |  |  |  | No            |                  1 | On Loan: No      |
| TARGA RESOURCES CORP                                   | TARGA RESOURCES CORP                                   | CUSIP: 87612G101<br>LEI: 5493003QENHHS261UR94 | Long             | EC               | CORP              | US        |    710170 | NS      | $112157148.10 | 12.41%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-22

**Name of Applicant:** ClearBridge Energy Midstream Opportunity Fund Inc.

**Signature:** Christopher Berarducci

**Name of Signer:** Christopher Berarducci

**Title:** Principal Financial Officer