# EDGAR Filing Document

**Accession Number:** 0001056973
**File Stem:** 0001193125-23-088122
**Filing Date:** 2023-3
**Character Count:** 30399
**Document Hash:** 892038a7ea3a59516e36c34f09ea909f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-088122.hdr.sgml**: 20230331

**ACCESSION NUMBER**: 0001193125-23-088122

**CONFORMED SUBMISSION TYPE**: SC 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230331

**DATE AS OF CHANGE**: 20230331

**GROUP MEMBERS**: ASGARD INVESTMENT CORP. II

**GROUP MEMBERS**: BLACK DIAMOND ARBITRAGE OFFSHORE LTD.

**GROUP MEMBERS**: CLINT D. CARLSON

**GROUP MEMBERS**: DOUBLE BLACK DIAMOND OFFSHORE LTD.

**GROUP MEMBERS**: EDCA 2019 FUND, L.P.

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Glatfelter Corp
- **CENTRAL INDEX KEY:** 0000041719
- **STANDARD INDUSTRIAL CLASSIFICATION:** PAPER MILLS [2621]
- **IRS NUMBER:** 230628360
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-14245
- **FILM NUMBER:** 23788091

**BUSINESS ADDRESS:**
- **STREET 1:** 4350 CONGRESS STREET
- **STREET 2:** SUITE 600
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28209
- **BUSINESS PHONE:** 866-744-7380

**MAIL ADDRESS:**
- **STREET 1:** 4350 CONGRESS STREET
- **STREET 2:** SUITE 600
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28209

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GLATFELTER P H CO
- **DATE OF NAME CHANGE:** 19920703
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** CARLSON CAPITAL L P
- **CENTRAL INDEX KEY:** 0001056973
- **IRS NUMBER:** 752494317
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 2100 MCKINNEY AVE
- **STREET 2:** STE 1800
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201
- **BUSINESS PHONE:** 2149329600

**MAIL ADDRESS:**
- **STREET 1:** 2100 MCKINNEY AVE
- **STREET 2:** STE 1800
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75201

------

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

------

**SCHEDULE 13D** 

**Under the Securities Exchange Act of 1934** 

**(Amendment No. 1)\*** 

------

## Glatfelter Corporation
**(Name of Issuer)** 

**Common Stock, $0.01 par value per share** 

**(Title of Class of Securities)** 

**377316104** 

**(CUSIP Number)** 

**Carlson Capital, L.P.** 

**Attn: Ewelina Z. Post** 

**2100 McKinney Avenue, Suite 1900** 

**Dallas, TX 75201** 

**(214) 932-9600** 

**(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)** 

**March 29, 2023** 

**(Date of Event Which Requires Filing of This Statement)** 

------

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

\* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 (the "Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;Carlson Capital, L.P. |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;AF |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>Delaware |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;13.2% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;PN, IA |

---

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;Double Black Diamond Offshore Ltd. |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;WC |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>Cayman Islands |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;3,852,699 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;3,852,699 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;3,852,699 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;8.6% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;CO |

---

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;Black Diamond Arbitrage Offshore Ltd. |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;WC |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>Cayman Islands |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;1,633,791 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;1,633,791 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;1,633,791 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;3.6% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;CO |

---

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;EDCA 2019 Fund, L.P. |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;WC |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>Delaware |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;428,510 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;428,510 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;428,510 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;0.9% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;PN |

---

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;Asgard Investment Corp. II |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;AF |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>Delaware |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;13.2% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;CO |

---

------

---

| | |
|:---|:---|
| **CUSIP No. 377316104** | **SCHEDULE 13D** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; **1** | &nbsp;&nbsp;&nbsp;&nbsp;NAMES OF REPORTING PERSON <br>&nbsp;&nbsp;&nbsp;&nbsp;Clint D. Carlson |
| &nbsp;&nbsp;&nbsp; **2** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br>&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☒ |
| &nbsp;&nbsp;&nbsp; **3** | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; **4** | &nbsp;&nbsp;&nbsp;&nbsp;SOURCE OF FUNDS<br>&nbsp;&nbsp;&nbsp;&nbsp;AF |
| &nbsp;&nbsp;&nbsp; **5** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp; **6** | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>United States |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **9** | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **10** | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;**11** | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;5,915,000 |
| &nbsp;&nbsp;&nbsp;**12** | &nbsp;&nbsp;&nbsp;&nbsp;CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;**13** | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES<br>&nbsp;&nbsp;&nbsp;&nbsp;13.2% |
| &nbsp;&nbsp;&nbsp;**14** | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN |

---

------

**EXPLANATORY NOTE** 

This Amendment No. 1 ("Amendment No. 1") amends and supplements the statement on Schedule 13D filed with the Securities and Exchange Commission (the "SEC") on October 17, 2022 (the "Original Schedule 13D"), with respect to shares of common stock, par value $0.01 per share (the "Common Shares"), of Glatfelter Corporation (the "Issuer"). This Amendment No. 1 amends Item 5 as set forth below.

**Item 1.** **SECURITY AND ISSUER** <br>

This Amendment No. 1 relates to the Common Shares of the Issuer, a Pennsylvania corporation. The Issuer's principal executive offices are located at 4350 Congress Street, Suite 600, Charlotte, North Carolina 28209.

**Item 2.** **IDENTITY AND BACKGROUND** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) This Schedule 13D is filed by: (i) Double Black Diamond Offshore Ltd., a Cayman Islands exempted company ("DOF"); (ii) Black Diamond Arbitrage Offshore Ltd., a Cayman Islands exempted company ("DAO"); (iii) EDCA 2019 Fund, L.P., a Delaware limited partnership ("EDCA" and, together with DOF and DAO, the "Funds"); (iv) Carlson Capital, L.P., a Delaware limited partnership and investment manager to the Funds ("Carlson Capital"); (v) Asgard Investment Corp. II, a Delaware corporation and the general partner of Carlson Capital ("Asgard II"); and (vi) Mr. Clint D. Carlson, an individual ("Mr. Carlson" and, together with the Funds, Carlson Capital and Asgard II, the "Reporting Persons"). The name, citizenship, present principal occupation or employment and business address of each director and executive officer of DOF, DAO, EDCA, and Asgard II are set forth in Appendix A attached hereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The principal business address of each of the Reporting Persons is 2100 McKinney Avenue, Suite 1900, Dallas, TX 75201.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The principal business of the Funds is to invest in securities. The principal business of Carlson Capital is to serve as the investment manager to the Funds and to certain managed accounts. The principal business of Asgard II is serving as the general partner of Carlson Capital. The principal occupation of Mr. Carlson is serving as President of Asgard II and Carlson Capital.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) None of the Reporting Persons or persons listed on Appendix A has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) None of the Reporting Persons or persons listed on Appendix A has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceedings was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) Mr. Carlson is a citizen of the United States. The places of organization of each of the other Reporting Persons are listed in paragraph (a) of this Item 2.

**Item 3.** **SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION** <br>

The Reporting Persons used the amounts set forth in Annex B to purchase the additional Common Shares reported in this Amendment No. 1.

The source of the funds used to acquire the Common Shares reported herein is the working capital of the Funds and margin borrowings described in the following sentence. Such Common Shares are held by the Reporting Persons in commingled margin accounts, which may extend margin credit to the Reporting Persons from time to time, subject to applicable federal margin regulations, stock exchange

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rules and credit policies. In such instances, the positions held in the margin account are pledged as collateral security for the repayment of debit balances in the account. The margin accounts bear interest at a rate based upon the broker's call rate from time to time in effect. Because other securities are held in the margin accounts, it is not possible to determine the amounts, if any, of margin used to purchase the Common Shares reported herein.

**Item 4.** **PURPOSE OF TRANSACTION** <br>

(a)-(j) The Reporting Persons acquired the Issuer's Common Shares for investment purposes and believe that the Issuer's Common Shares trade at a substantial discount to the Issuer's intrinsic value and represent an attractive investment opportunity.

The Reporting Persons and their representatives intend, from time to time, to engage in discussions and correspondence with management and the Issuer's Board of Directors regarding, among other things, the Issuer's business and operations, management and strategic alternatives and direction, including how to enhance stockholder value. In addition, the Reporting Persons may (i) have discussions regarding the Issuer with other stockholders, persons that may be interested in transactions with the Company, and other interested market and industry participants; (ii) propose or consider any one or more of the actions described in subsections (a) through (j) of Item 4 of Schedule 13D; or (iii) change their intention with respect to any and all matters referred to in this Item 4.

**Item 5.** **INTEREST IN SECURITIES OF THE ISSUER** <br>

(a), (b) The Reporting Persons may be deemed to beneficially own in the aggregate 5,915,000 Common Shares. Based upon a total of 44,827,249 Common Shares outstanding as of February 27, 2023, as reported in the Issuer's Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the Securities and Exchange Commission "on February 27, 2023, the Reporting Persons' shares represent approximately 13.2% of the outstanding Common Shares.

Carlson Capital, Asgard II and Mr. Carlson may be deemed to beneficially own and have the power to vote and direct the disposition of (i) the 3,852,699 Common Shares reported herein as owned by DOF, (ii) the 1,633,791 Common Shares reported herein as owned by DAO and (iii) the 428,510 Common Shares reported herein as owned by EDCA.

DOF may be deemed to beneficially own and has the power to vote and dispose the 3,852,699 Common Shares (which includes 50,000 shares of the Issuer's Common Shares acquired on January 20, 2023 upon the exercise of 500 stock options) reported herein as owned by it, which shares represent approximately 8.6% of the outstanding Common Shares.

DAO may be deemed to beneficially own and has the power to vote and dispose the 1,633,791 Common Shares reported herein as owned by it, which shares represent approximately 3.6% of the outstanding Common Shares.

EDCA may be deemed to beneficially own and has the power to vote and dispose the 428,510 Common Shares reported herein as owned by it, which shares represent approximately 0.9% of the outstanding Common Shares.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The Reporting Persons have not effected any transactions in the Common Shares in the last 60 days preceding March 29, 2023, other than as set forth herein on Appendix B.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) Except as set forth herein, no person other than the Reporting Persons is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, Common Shares.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) Not applicable.

The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purposes of Section 13 of the Act, the beneficial owner of the Common Shares reported herein.

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**Item 6.** **CONTRACT, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER** <br>

Double Black Diamond Offshore Ltd. holds $5,000,000 aggregate principal amount of the Issuer's 4.750% senior notes due 2029.

The Reporting Persons are parties to an agreement with respect to the joint filing of this Schedule 13D and any amendments thereto. A copy of such agreement is attached hereto as Exhibit 1 and is incorporated by reference herein.

Except as set forth herein, there are no contracts, understandings or relationships among the Reporting Persons or between the Reporting Persons and any other person with respect to the Common Shares.

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**SIGNATURES** 

After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

DATED: March 31, 2023

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| | |
|:---|:---|
| **DOUBLE BLACK DIAMOND OFFSHORE LTD.** | **DOUBLE BLACK DIAMOND OFFSHORE LTD.** |
| By: Carlson Capital, L.P., its investment manager | By: Carlson Capital, L.P., its investment manager |
| By: Asgard Investment Corp. II, its general partner | By: Asgard Investment Corp. II, its general partner |
| By: | /s/ Clint D. Carlson |

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Name: Clint D. Carlson <br> Title: President

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| | |
|:---|:---|
|  **BLACK DIAMOND ARBITRAGE OFFSHORE LTD.** | **BLACK DIAMOND ARBITRAGE OFFSHORE LTD.** |
|  By: Carlson Capital, L.P., its investment manager | By: Carlson Capital, L.P., its investment manager |
|  By: Asgard Investment Corp. II, its general partner | By: Asgard Investment Corp. II, its general partner |
|  By: | /s/ Clint D. Carlson |

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Name: Clint D. Carlson <br> Title: President

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| | |
|:---|:---|
|  **EDCA 2019 Fund, L.P.** | **EDCA 2019 Fund, L.P.** |
|  By: Carlson Capital, L.P., its investment manager | By: Carlson Capital, L.P., its investment manager |
|  By: Asgard Investment Corp. II, its general partner | By: Asgard Investment Corp. II, its general partner |
|  By: | /s/ Clint D. Carlson |

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Name: Clint D. Carlson <br> Title: President

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| | |
|:---|:---|
|  **CARLSON CAPITAL, L.P.** | **CARLSON CAPITAL, L.P.** |
|  By: Asgard Investment Corp. II, its general partner | By: Asgard Investment Corp. II, its general partner |
|  By: | /s/ Clint D. Carlson |

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Name: Clint D. Carlson <br> Title: President

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| | |
|:---|:---|
|  **ASGARD INVESTMENT CORP. II** | **ASGARD INVESTMENT CORP. II** |
|  By: | /s/ Clint D. Carlson |

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Name: Clint D. Carlson <br> Title: President

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| |
|:---|
|  **CLINT D. CARLSON** |
|  /s/ Clint D. Carlson |

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**<u>Appendix A</u>**

DIRECTORS AND EXECUTIVE OFFICERS OF CERTAIN REPORTING PERSONS

The following sets forth the name, position and principal occupation of each director and executive officer of Asgard II. Except as otherwise indicated, the business address of each director and officer is 2100 McKinney Avenue, Suite 1900, Dallas, TX 75201. To the best of the Reporting Persons' knowledge, except as set forth in this Schedule 13D, none of the directors or executive officers of Asgard II owns any Common Shares.

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| | | | |
|:---|:---|:---|:---|
| **<u>Asgard II</u>** |  |  |  |
| **Name** | **Position** | **Principal Occupation** | **Citizenship** |
|  Clint Carlson | Director/President | Investment Manager | United States |
|  Nancy Carlson | Secretary/Treasurer | Executive | United States |

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**<u>Appendix B</u>**

Set forth below is a list of transactions in shares of the Issuer's Common Shares which, to the best of the knowledge of the Reporting Persons, have been effected in the past 60 days preceding March 29, 2023 in the ordinary course of business. The Reporting persons engaged in the following open market transactions which are summarized below, to report (i) the total amount of shares that were the subject of transactions effected on each day and (ii) the price per share on each day at which the transactions were effected:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Trade Date** | **Entity** | **Purchase or<br>Sale** | **Quantity** | **Price** |
| 01/20/2023\* | Double Black Diamond Offshore Ltd. | Purchase | 50000 | $2.50 |
| 03/29/2023 | EDCA 2019 Fund, L.P. | Purchase | 84090 | $3.093799 |
| 03/29/2023 | Black Diamond Arbitrage Offshore Ltd. | Purchase | 253655 | $3.093799 |
| 03/29/2023 | Double Black Diamond Offshore Ltd. | Purchase | 162255 | $3.093799 |

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\* The stock options reported herein were in-the-money and were exercised automatically.