# EDGAR Filing Document

**Accession Number:** 0001760055
**File Stem:** 0000080420-26-000056
**Filing Date:** 2026-4
**Character Count:** 14378
**Document Hash:** 4e142701422c469e604666aab7e75bb6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000080420-26-000056.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0000080420-26-000056

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** METCALF MICHAEL WILLIAM
- **CENTRAL INDEX KEY:** 0001760055

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-12488
- **FILM NUMBER:** 26833584

**MAIL ADDRESS:**
- **STREET 1:** 8550 MOSLEY ROAD
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77075
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** POWELL INDUSTRIES INC
- **CENTRAL INDEX KEY:** 0000080420
- **STANDARD INDUSTRIAL CLASSIFICATION:** SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 880106100
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 0930

**BUSINESS ADDRESS:**
- **STREET 1:** 8550 MOSLEY DR
- **STREET 2:** POST OFFICE BOX 12818
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77075
- **BUSINESS PHONE:** 7139446900

**MAIL ADDRESS:**
- **STREET 1:** 8550 MOSLEY DRIVE P O BOX 12818
- **STREET 2:** 8550 MOSLEY DRIVE P O BOX 12818
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77075

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PROCESS SYSTEMS INC
- **DATE OF NAME CHANGE:** 19780926

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[x] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>METCALF MICHAEL WILLIAM<br><sub>(Last) (First) (Middle)</sub><br>8550 MOSLEY ROAD<br><sub>(Street)</sub><br>HOUSTON, TX 77075<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Exec Vice President_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>POWELL INDUSTRIES INC [ POWL ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 40<sup>(1)</sup> | D | $510.16 | 30760<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 80<sup>(1)</sup> | D | 511.76<sup>(3)</sup> | 30680<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 80<sup>(1)</sup> | D | 513.07<sup>(4)</sup> | 30600<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 140<sup>(1)</sup> | D | 516.09<sup>(5)</sup> | 30460<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 162<sup>(1)</sup> | D | 517.35<sup>(6)</sup> | 30298<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 202<sup>(1)</sup> | D | 518.67<sup>(7)</sup> | 30096<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 240<sup>(1)</sup> | D | 519.47<sup>(8)</sup> | 29856<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 200<sup>(1)</sup> | D | 520.85<sup>(9)</sup> | 29656<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 204<sup>(1)</sup> | D | 522.15<sup>(10)</sup> | 29452<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 120<sup>(1)</sup> | D | 522.88<sup>(11)</sup> | 29332<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 40<sup>(1)</sup> | D | $528.67 | 29292<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 40<sup>(1)</sup> | D | $530.81 | 29252<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 40<sup>(1)</sup> | D | $532.74 | 29212<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 120<sup>(1)</sup> | D | 534.62<sup>(12)</sup> | 29092<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 240<sup>(1)</sup> | D | 535.81<sup>(13)</sup> | 28852<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 393<sup>(1)</sup> | D | 536.81<sup>(14)</sup> | 28459<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 200<sup>(1)</sup> | D | 537.51<sup>(15)</sup> | 28259<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 234<sup>(1)</sup> | D | 539.07<sup>(16)</sup> | 28025<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 175<sup>(1)</sup> | D | 540.19<sup>(17)</sup> | 27850<sup>(2)</sup> | D |  |
| Common Stock | 2026-03-31 | 2026-03-31 | S |  | 50<sup>(1)</sup> | D | 541.43<sup>(18)</sup> | 27800<sup>(2)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

(2) Includes shares that have a time-based vesting provision.

(3) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $511.75-$511.76, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(4) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $513.04-$513.09, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(5) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $515.68-$516.55, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(6) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $517.12-$517.78, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(7) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $518.27-$519.26, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(8) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $519.31-$519.93, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(9) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $520.36-$521.30, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(10) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $521.68-$522.65, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(11) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $522.72-$523.00, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(12) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $534.09-$534.95, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(13) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $535.26-$536.06, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(14) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $536.37-$537.20, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(15) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $537.45-$537.61, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(16) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $538.83-$539.83, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(17) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $539.89-$540.57, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

(18) The price reported in Column 4 is an average price; shares were sold in multiple transactions.  Reporting range is $541.18-$541.56, inclusive.  Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

**Signature:** Michael W. Metcalf  
**Date:** 2026-04-01

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**