# EDGAR Filing Document

**Accession Number:** 0001255662
**File Stem:** 0000899140-26-000207
**Filing Date:** 2026-2
**Character Count:** 9334
**Document Hash:** ca0094a0fb22cd9f4c794444d8c7f286
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000899140-26-000207.hdr.sgml**: 20260213

**ACCESSION NUMBER**: 0000899140-26-000207

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260213

**FILED AS OF DATE**: 20260213

**DATE AS OF CHANGE**: 20260213

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** MARABITO RICHARD T
- **CENTRAL INDEX KEY:** 0001255662

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34735
- **FILM NUMBER:** 26635601

**MAIL ADDRESS:**
- **STREET 1:** 5096 RICHMOND ROAD
- **CITY:** BEDFORD HEIGHTS
- **STATE:** OH
- **ZIP:** 44146
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Ryerson Holding Corp
- **CENTRAL INDEX KEY:** 0001481582
- **STANDARD INDUSTRIAL CLASSIFICATION:** WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 261251524
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 227 W. MONROE ST., 27TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312 292-5000

**MAIL ADDRESS:**
- **STREET 1:** 227 W. MONROE ST., 27TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

### 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).

[ ] 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>MARABITO RICHARD T<br><sub>(Last) (First) (Middle)</sub><br>C/O RYERSON HOLDING CORPORATION<br>227 W. MONROE ST., 27TH FLOOR<br><sub>(Street)</sub><br>CHICAGO, IL 60606<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-13 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_President & COO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Ryerson Holding Corp [ RYI ] | **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 (par value $0.01 per share) | 2026-02-13 |  | A |  | 125292 | A | <sup>(1)</sup> | 125292 | 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 |
| Restricted Stock Units | <sup>(2)</sup> | 2026-02-13 |  | A |  | 33005 |  | <sup>(3)</sup> | <sup>(3)</sup> | Common Stock | 33005 | <sup>(4)(5)</sup> | 33005 | D |  |
| Restricted Stock Units | <sup>(2)</sup> | 2026-02-13 |  | A |  | 88101 |  | <sup>(3)</sup> | <sup>(3)</sup> | Common Stock | 88101 | <sup>(4)(6)</sup> | 88101 | D |  |
| Restricted Stock Units | <sup>(2)</sup> | 2026-02-13 |  | A |  | 14104 |  | <sup>(7)</sup> | <sup>(7)</sup> | Common Stock | 14104 | <sup>(4)(8)</sup> | 14104 | D |  |
| Restricted Stock Units | <sup>(2)</sup> | 2026-02-13 |  | A |  | 18815 |  | <sup>(9)</sup> | <sup>(9)</sup> | Common Stock | 18815 | <sup>(4)(10)</sup> | 18815 | D |  |
| Restricted Stock Units | <sup>(2)</sup> | 2026-02-13 |  | A |  | 150496 |  | <sup>(11)</sup> | <sup>(11)</sup> | Common Stock | 150496 | $0 | 150496 | D |  |

---

### Footnotes:

(1) The Reporting Person received 125,292 shares of the Issuer's common stock in exchange for 73,249 shares of common stock, without par value, of Olympic Steel, Inc. ("Olympic Steel") in connection with the merger between Olympic Steel and the Issuer (the "Merger") pursuant to the terms of the Agreement and Plan of Merger, dated as of October 28, 2025 (the "Merger Agreement"), by and among the Issuer, Olympic Steel and Crimson MS Corp. In accordance with the Merger Agreement, each share of Olympic Steel's common stock was cancelled and converted into the right to receive 1.7105 shares (the "Exchange Ratio") of the Issuer's common stock, with cash paid in lieu of fractional shares.

(2) Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer.

(3) The restricted stock units have fully vested. Vested shares will be delivered to the reporting person upon separation of service.

(4) Pursuant to the Merger Agreement, at the effective time, the reporting person's Olympic Steel restricted stock units were assumed and converted into restricted stock units with respect to a number of shares of the Issuer's common stock (rounded down to the nearest whole share) determined by multiplying (i) the number of shares of Olympic Steel common stock subject to the Olympic Steel restricted stock unit immediately prior to the effective time of the Merger by (ii) the Exchange Ratio. The converted restricted stock units will otherwise be subject to the same terms and conditions as were applicable to the Olympic Steel restricted stock units prior to the effective time of the Merger.

(5) The Reporting Person received 33,005 restricted stock units of the Issuer in exchange for restricted stock units with respect to 19,296 shares of Olympic Steel's common stock.

(6) The Reporting Person received 88,101 restricted stock units of the Issuer in exchange for restricted stock units with respect to 51,506 shares of Olympic Steel's common stock.

(7) The restricted stock units will vest on December 31, 2026. Vested shares will be delivered to the reporting person within 90 days following the vesting date.

(8) The Reporting Person received 14,104 restricted stock units of the Issuer in exchange for restricted stock units with respect to 8,246 shares of Olympic Steel's common stock.

(9) The restricted stock units will vest on December 31, 2027. Vested shares will be delivered to the reporting person within 90 days following the vesting date.

(10) The Reporting Person received 18,815 restricted stock units of the Issuer in exchange for restricted stock units with respect to 11,000 shares of Olympic Steel's common stock.

(11) The Reporting Person received a one-time sign-on restricted stock unit award in connection with the Merger, which will vest on the third anniversary of the closing date of the Merger. Vested shares will be delivered to the reporting person upon vesting.

**Signature:** /s/ Camilla Rykke Merrick, attorney-in-fact  
**Date:** 2026-02-13

### 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.**