# EDGAR Filing Document

**Accession Number:** 0000852772
**File Stem:** 0000921895-25-002580
**Filing Date:** 2025-9
**Character Count:** 50640
**Document Hash:** f3b85c7e79bb6d33d8dc6908dc076d96
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000921895-25-002580.hdr.sgml**: 20250915

**ACCESSION NUMBER**: 0000921895-25-002580

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250915

**DATE AS OF CHANGE**: 20250915

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DENNY'S Corp
- **CENTRAL INDEX KEY:** 0000852772
- **STANDARD INDUSTRIAL CLASSIFICATION:** RETAIL-EATING PLACES [5812]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 133487402
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-40568
- **FILM NUMBER:** 251315469

**BUSINESS ADDRESS:**
- **STREET 1:** 203 EAST MAIN STREET
- **CITY:** SPARTANBURG
- **STATE:** SC
- **ZIP:** 29319
- **BUSINESS PHONE:** 8645978000

**MAIL ADDRESS:**
- **STREET 1:** 203 EAST MAIN STREET
- **CITY:** SPARTANBURG
- **STATE:** SC
- **ZIP:** 29319

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DENNYS CORP
- **DATE OF NAME CHANGE:** 20020801

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ADVANTICA RESTAURANT GROUP INC
- **DATE OF NAME CHANGE:** 19980107

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FLAGSTAR COMPANIES INC
- **DATE OF NAME CHANGE:** 19930722
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** JCP Investment Management, LLC
- **CENTRAL INDEX KEY:** 0001461945

**ORGANIZATION NAME:**
- **EIN:** 264654347
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** 1177 WEST LOOP SOUTH
- **STREET 2:** SUITE 1320
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77027
- **BUSINESS PHONE:** 713-201-6910

**MAIL ADDRESS:**
- **STREET 1:** 1177 WEST LOOP SOUTH
- **STREET 2:** SUITE 1320
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77027

## Ex-1

Exhibit 1

**<u>Transactions in the Securities of the Issuer During the Past 60 Days</u>**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;Nature of the<u><br> Transaction</u> | &nbsp;&nbsp; Securities<br> <u>Purchased/(Sold)</u> | &nbsp;&nbsp; Price Per<br> <u>Security($)<sup>\*</sup></u> | &nbsp;&nbsp;<u>Price Range ($)</u> | &nbsp;&nbsp; Date of<br> <u>Purchase/Sale</u> |

---

**<u>JCP INVESTMENT PARTNERSHIP, LP</u>**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;5530 | &nbsp;&nbsp;4.0443 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/13/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;13764 | &nbsp;&nbsp;4.2773 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/19/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;27502 | &nbsp;&nbsp;4.3156 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/20/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;54985 | &nbsp;&nbsp;4.2117 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/21/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;54942 | &nbsp;&nbsp;4.4703 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/22/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;54905 | &nbsp;&nbsp;4.4731 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/25/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;54962 | &nbsp;&nbsp;4.8632 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;109825 | &nbsp;&nbsp;5.0257 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/09/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;24434 | &nbsp;&nbsp;4.8219 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/10/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;54868 | &nbsp;&nbsp;5.1864 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/11/2025 |

---

**<u>JCP INVESTMENT MANAGEMENT, LLC<br> (Through the JCP Accounts)</u>**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;4470 | &nbsp;&nbsp;4.0443 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/13/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;11236 | &nbsp;&nbsp;4.2773 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/19/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;22498 | &nbsp;&nbsp;4.3156 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/20/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;45015 | &nbsp;&nbsp;4.2117 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/21/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;45058 | &nbsp;&nbsp;4.4703 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/22/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;45095 | &nbsp;&nbsp;4.4731 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/25/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;45038 | &nbsp;&nbsp;4.8632 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;90175 | &nbsp;&nbsp;5.0257 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/09/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;20057 | &nbsp;&nbsp;4.8219 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/10/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;45132 | &nbsp;&nbsp;5.1864 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/11/2025 |

---

**<u>JUMANA CAPITAL INVESTMENTS LLC</u>**

---

| | | | | |
|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;10000 | &nbsp;&nbsp;4.0124 | &nbsp;&nbsp;– | &nbsp;&nbsp;07/17/2025 |
| &nbsp;&nbsp;Sale of Common Stock | &nbsp;&nbsp;(39399) | &nbsp;&nbsp;4.5468 | &nbsp;&nbsp;4.5075 - 4.5917 | &nbsp;&nbsp;07/23/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;10000 | &nbsp;&nbsp;4.2995 | &nbsp;&nbsp;– | &nbsp;&nbsp;07/24/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;10000 | &nbsp;&nbsp;3.6597 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/01/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;110000 | &nbsp;&nbsp;3.7013 | &nbsp;&nbsp;3.6596 - 3.7067 | &nbsp;&nbsp;08/04/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;100000 | &nbsp;&nbsp;3.5021 | &nbsp;&nbsp;3.3900 - 3.5465 | &nbsp;&nbsp;08/05/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;100000 | &nbsp;&nbsp;3.6263 | &nbsp;&nbsp;3.5031- 3.6474 | &nbsp;&nbsp;08/06/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;50500 | &nbsp;&nbsp;3.5583 | &nbsp;&nbsp;3.4700 - 3.5965 | &nbsp;&nbsp;08/07/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;199612 | &nbsp;&nbsp;3.5796 | &nbsp;&nbsp;3.4700 - 3.6300 | &nbsp;&nbsp;08/08/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;39971 | &nbsp;&nbsp;3.6615 | &nbsp;&nbsp;3.6058 - 3.7000 | &nbsp;&nbsp;08/11/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;214940 | &nbsp;&nbsp;3.8234 | &nbsp;&nbsp;3.6967 - 3.8799 | &nbsp;&nbsp;08/12/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;113138 | &nbsp;&nbsp;4.0405 | &nbsp;&nbsp;3.8417 - 4.1659 | &nbsp;&nbsp;08/13/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;87444 | &nbsp;&nbsp;4.0035 | &nbsp;&nbsp;3.9495 - 4.0584 | &nbsp;&nbsp;08/14/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;131999 | &nbsp;&nbsp;4.0562 | &nbsp;&nbsp;3.9371 - 4.1183 | &nbsp;&nbsp;08/15/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;52112 | &nbsp;&nbsp;4.0364 | &nbsp;&nbsp;4.0292 - 4.0481 | &nbsp;&nbsp;08/18/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;96117 | &nbsp;&nbsp;4.2105 | &nbsp;&nbsp;4.0600 - 4.3022 | &nbsp;&nbsp;08/19/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;182673 | &nbsp;&nbsp;4.2851 | &nbsp;&nbsp;4.2457 - 4.3620 | &nbsp;&nbsp;08/20/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;62946 | &nbsp;&nbsp;4.2247 | &nbsp;&nbsp;4.1969 - 4.2399 | &nbsp;&nbsp;08/21/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;60035 | &nbsp;&nbsp;4.4735 | &nbsp;&nbsp;4.4651 - 4.4800 | &nbsp;&nbsp;08/22/2025 |
| &nbsp;&nbsp;Sale of February 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(100) | &nbsp;&nbsp;1.0000 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/22/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;53508 | &nbsp;&nbsp;4.4982 | &nbsp;&nbsp;4.4731 - 4.5000 | &nbsp;&nbsp;08/25/2025 |
| &nbsp;&nbsp;Sale of February 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(1004) | &nbsp;&nbsp;1.0003 | &nbsp;&nbsp;1.0000 - 1.0003 | &nbsp;&nbsp;08/25/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;225 | &nbsp;&nbsp;4.5700 | &nbsp;&nbsp;– | &nbsp;&nbsp;08/26/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;100000 | &nbsp;&nbsp;4.3981 | &nbsp;&nbsp;4.3339 - 4.4470 | &nbsp;&nbsp;09/03/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;75000 | &nbsp;&nbsp;4.7534 | &nbsp;&nbsp;4.4975 - 4.7992 | &nbsp;&nbsp;09/04/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;75000 | &nbsp;&nbsp;4.8339 | &nbsp;&nbsp;4.6347 - 4.9118 | &nbsp;&nbsp;09/05/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;130578 | &nbsp;&nbsp;4.7538 | &nbsp;&nbsp;4.5942 - 4.8967 | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of September 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;202 | &nbsp;&nbsp;0.0900 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of September 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;200 | &nbsp;&nbsp;0.1150 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of September 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;144 | &nbsp;&nbsp;0.1000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of September 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;202 | &nbsp;&nbsp;0.1300 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of February 2026 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;500 | &nbsp;&nbsp;0.7410 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Sale of September 2025 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(101) | &nbsp;&nbsp;0.3649 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Sale of September 2025 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(72) | &nbsp;&nbsp;0.3583 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Sale of September 2025 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(100) | &nbsp;&nbsp;0.3500 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Sale of September 2025 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(101) | &nbsp;&nbsp;0.3600 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of November 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;99 | &nbsp;&nbsp;0.4900 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of November 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;1497 | &nbsp;&nbsp;0.5000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Purchase of November 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;5000 | &nbsp;&nbsp;0.4500 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/08/2025 |
| &nbsp;&nbsp;Sale of February 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(79) | &nbsp;&nbsp;0.8500 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/09/2025 |
| &nbsp;&nbsp;Sale of September 2025 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(1) | &nbsp;&nbsp;0.2000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/09/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;313299 | &nbsp;&nbsp;5.0359 | &nbsp;&nbsp;4.8200 - 5.1417 | &nbsp;&nbsp;09/09/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;235660 | &nbsp;&nbsp;4.9004 | &nbsp;&nbsp;4.7000 - 4.9440 | &nbsp;&nbsp;09/10/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;254301 | &nbsp;&nbsp;5.1643 | &nbsp;&nbsp;4.8695 - 5.1864 | &nbsp;&nbsp;09/11/2025 |
| &nbsp;&nbsp;Sale of February 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(17) | &nbsp;&nbsp;0.8300 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/11/2025 |
| &nbsp;&nbsp;Purchase of September 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;2 | &nbsp;&nbsp;0.2000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/11/2025 |
| &nbsp;&nbsp;Purchase of November 2025 Call Option ($5.00 Strike Price) | &nbsp;&nbsp;4 | &nbsp;&nbsp;0.6000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/11/2025 |
| &nbsp;&nbsp;Purchase of Common Stock | &nbsp;&nbsp;335000 | &nbsp;&nbsp;5.1943 | &nbsp;&nbsp;5.1261 - 5.3324 | &nbsp;&nbsp;09/12/2025 |
| &nbsp;&nbsp;Sale of May 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(450) | &nbsp;&nbsp;0.7544 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/15/2025 |
| &nbsp;&nbsp;Sale of May 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(850) | &nbsp;&nbsp;0.8000 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/15/2025 |
| &nbsp;&nbsp;Sale of May 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(20000) | &nbsp;&nbsp;0.7813 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/15/2025 |
| &nbsp;&nbsp;Sale of May 2026 Put Option ($5.00 Strike Price) | &nbsp;&nbsp;(200) | &nbsp;&nbsp;0.8500 | &nbsp;&nbsp;– | &nbsp;&nbsp;09/15/2025 |

---

------

<sup>\*</sup> The price reported in column <u>Price Per Security ($)</u> is a weighted average price if a price range is indicated in column <u>Price Range ($)</u>. These securities were purchased or sold in multiple transactions at prices between the corresponding price ranges in the applicable row. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities purchased or sold at each separate price.

## Exhibit 99.1

Exhibit 99.1

**GROUP AGREEMENT**

This Agreement (this "<u>Agreement</u>") is made and entered into as of September 8, 2025 (the "<u>Effective Date</u>"), by and among (i) JCP Investment Partnership, LP, JCP Investment Partners, LP, JCP Investment Holdings, LLC, JCP Investment Management, LLC and James C. Pappas (collectively, "<u>JCP</u>"), and (ii) Jumana Capital Investments LLC and Christopher R. Martin (collectively, "<u>Jumana</u>" and together with JCP, each a "<u>Party</u>" and collectively, the "<u>Parties</u>" or the "<u>Group</u>").

WHEREAS, certain of the undersigned are stockholders, direct or beneficial, of Denny's Corporation, a Delaware corporation (the "<u>Company</u>"); and

WHEREAS, the Parties desire to form the Group for the purpose of (i) coordinating their activities with respect to the Company, (ii) taking all other action necessary to achieve the foregoing and (iii) taking any other actions the Group determines to undertake in connection with their respective investment in the Company (the "<u>Coordinated Activities</u>").

NOW, THEREFORE, in consideration of the foregoing premises and the mutual covenants and agreements contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties, intending to be legally bound hereby, agree as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.Each of the undersigned agrees to form a "<u>group</u>" (as such term is defined in Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the "<u>Exchange Act</u>")) with respect to the securities of the Company. In furtherance of the foregoing and in accordance with Rule 13d-1(k) of the Exchange Act, the Parties shall file, separately or jointly, a Schedule(s) 13D and any amendments thereto with respect to the securities of the Company to the extent required by applicable law. Each member of the Group shall be responsible for the accuracy and completeness of its own disclosure therein, and shall not be responsible for the accuracy and completeness of the information concerning the other members of the Group, unless such member knows or has reason to know that such information is inaccurate.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.So long as this Agreement is in effect, each of the undersigned shall provide written notice to Olshan Frome Wolosky LLP ("<u>Olshan</u>"), such notice to be given no later than four (4) hours after each such transaction, of (i) any of their purchases or sales of securities of the Company, or (ii) any securities of the Company over which they acquire or dispose of beneficial ownership; *<u>provided</u>*, *<u>however</u>*, that each Party agrees not to purchase or sell securities of the Company or otherwise increase or decrease its economic exposure to or beneficial ownership over the securities of the Company if it reasonably believes that, as a result of such action, the Group or any member thereof would be likely to be required to make any regulatory filing (including, but not limited to, a Schedule 13D or amendment thereto, Form 3 or Form 4 with the Securities and Exchange Commission (the "<u>SEC</u>")) without using its reasonable efforts to give the other members of the Group at least twelve (12) hours prior written notice. In addition, JCP and Jumana shall agree on a trading policy to be in effect during the term of this Agreement, which shall (i) take into account any capacity limitations with respect to securities of the Company and the desired timing of the Parties crossing any ownership thresholds with respect to securities of the Company that would trigger a filing with the SEC and (ii) provide that each of JCP and Jumana will only buy, sell or otherwise transact in securities of the Company approximately in proportion to the agreed upon target position of each Party. For purposes of this Agreement, the term "<u>beneficial ownership</u>" shall have the meaning of such term set forth in Rule 13d-3 under the Exchange Act.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Each of the undersigned agrees to form the Group for the purpose of the Coordinated Activities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.JCP and Jumana hereby agree to jointly pay all expenses and costs (including all legal fees) incurred in connection with the Group's activities (the "<u>Expenses</u>") on a percentage basis as follows: (i) JCP 20% of the Expenses and (ii) Jumana 80% of the Expenses. Any reimbursement from the Company regarding the Expenses paid pursuant to this Section 4 shall be split by the Parties in proportion to the Expenses paid pursuant to this Section 4.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.Each Party agrees that any filing with the SEC, press release or other communication proposed to be made or issued by the Group or any member of the Group in connection with the Group's activities shall first be approved by a representative of JCP and Jumana. The Parties agree to work in good faith to resolve any disagreement that may arise between or among any members of the Group concerning decisions to be made, actions to be taken or statements to be made in connection with the Group's activities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.The relationship of the Parties shall be limited to carrying on the business of the Group in accordance with the terms of this Agreement. Such relationship shall be construed and deemed to be for the sole and limited purpose of carrying on such business as described herein. Nothing herein shall be construed to authorize any Party to act as an agent for any other party, or to create a joint venture or partnership, or to constitute an indemnification. Each Party agrees to use its reasonable efforts to avoid taking any action that may cause any other person or entity to be deemed to be a member of the Group without the prior consent of each of JCP and Jumana. Except as provided in Section 2, nothing herein shall restrict any Party's right to purchase or sell securities of the Company, as it deems appropriate, in its sole discretion, provided that all such purchases and sales are made in compliance with all applicable securities laws and the provisions of this Agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.This Agreement may be executed in two or more counterparts, which together shall constitute a single agreement. Any signature to this Agreement transmitted by facsimile transmission, by electronic mail in "portable document format" (".pdf") form or by any other electronic means intended to preserve the original graphic and pictorial appearance of a document, shall have the same effect as physical delivery of the paper document bearing the original signature.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.This Agreement is governed by and will be construed in accordance with the laws of the State of New York. In the event of any dispute arising out of the provisions of this Agreement or their investment in the Company, the Parties consent and submit to the exclusive jurisdiction of the United States District Court for the Southern District of New York located in the Borough of Manhattan or the courts of the State of New York located in the County of New York.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9.This Agreement shall terminate on the earliest to occur of (i) 11:59 p.m. (New York time) on the second anniversary of the Effective Date, (ii) the conclusion of the Coordinated Activities or (iii) the mutual written agreement of JCP and Jumana; *<u>provided</u>*, *<u>however</u>*, that should any disagreement arise concerning the Coordinated Activities that cannot be resolved between the Parties, any dissatisfied Party shall have a 24-hour opportunity to withdraw from the Group and terminate its responsibilities hereunder prior to further public or private communications being made on behalf of the Group. In the event of termination, the Parties shall cooperate to take such actions as may be necessary or required publicly to disclose such termination and/or the consequences thereof, including, without limitation, amending any prior filings under the Exchange Act concerning the Company or the relationship of the Parties. Notwithstanding the foregoing, Section 4 (solely with respect to Expenses incurred prior to the termination of this Agreement) and Section 8 shall survive any termination of this Agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10.Each Party acknowledges that Olshan shall act as counsel for the Group and each of JCP and Jumana relating to their investment in the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11.The terms and provisions of this Agreement may not be modified, waived or amended without the written consent of each of the Parties.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12.Each Party hereby waives the application of any law, regulation, holding, or rule of construction providing that ambiguities in an agreement or other document will be construed against the party drafting such agreement or document.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;13.Each Party hereby agrees that this Agreement shall be filed as an exhibit to any Schedule(s) 13D required to be filed by it under applicable law as contemplated under Section 1 of this Agreement.

[Signature pages follow]

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed as of the day and year first above written.

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;JCP Investment Partnership, LP | &nbsp;&nbsp;JCP Investment Partnership, LP | &nbsp;&nbsp;JCP Investment Partnership, LP |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; JCP Investment Management, LLC<br> Investment Manager | &nbsp;&nbsp; JCP Investment Management, LLC<br> Investment Manager |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ James C. Pappas | &nbsp;&nbsp; /s/ James C. Pappas |
|  | &nbsp;&nbsp;Name: | &nbsp;&nbsp;James C. Pappas |
|  | &nbsp;&nbsp;Title: | &nbsp;&nbsp;Managing Member |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;JCP Investment Partners, LP | &nbsp;&nbsp;JCP Investment Partners, LP | &nbsp;&nbsp;JCP Investment Partners, LP |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; JCP Investment Holdings, LLC<br> General Partner | &nbsp;&nbsp; JCP Investment Holdings, LLC<br> General Partner |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ James C. Pappas | &nbsp;&nbsp; /s/ James C. Pappas |
|  | &nbsp;&nbsp;Name: | &nbsp;&nbsp;James C. Pappas |
|  | &nbsp;&nbsp;Title: | &nbsp;&nbsp;Sole Member |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;JCP Investment Holdings, LLC | &nbsp;&nbsp;JCP Investment Holdings, LLC | &nbsp;&nbsp;JCP Investment Holdings, LLC |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ James C. Pappas | &nbsp;&nbsp; /s/ James C. Pappas |
|  | &nbsp;&nbsp;Name: | &nbsp;&nbsp;James C. Pappas |
|  | &nbsp;&nbsp;Title: | &nbsp;&nbsp;Sole Member |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;JCP Investment Management, LLC | &nbsp;&nbsp;JCP Investment Management, LLC | &nbsp;&nbsp;JCP Investment Management, LLC |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ James C. Pappas | &nbsp;&nbsp; /s/ James C. Pappas |
|  | &nbsp;&nbsp;Name: | &nbsp;&nbsp;James C. Pappas |
|  | &nbsp;&nbsp;Title: | &nbsp;&nbsp;Managing Member |

---

---

| |
|:---|
| &nbsp;&nbsp; /s/ James C. Pappas |
| &nbsp;&nbsp;James C. Pappas |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;Jumana Capital Investments LLC | &nbsp;&nbsp;Jumana Capital Investments LLC | &nbsp;&nbsp;Jumana Capital Investments LLC |
| &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ Christopher R. Martin | &nbsp;&nbsp; /s/ Christopher R. Martin |
|  | &nbsp;&nbsp;Name: | &nbsp;&nbsp;Christopher R. Martin |
|  | &nbsp;&nbsp;Title: | &nbsp;&nbsp;Manager |

---

---

| |
|:---|
| &nbsp;&nbsp; /s/ Christopher R. Martin |
| &nbsp;&nbsp;Christopher R. Martin |

---

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**DENNY'S Corp**

*(Name of Issuer)*

**Common Stock, $0.01 par value**

*(Title of Class of Securities)*

**24869P104**

*(CUSIP Number)*

**JAMES C. PAPPAS**<br>JCP INVESTMENT MANAGEMENT, LLC<br>1177 West Loop South, Suite 1320<br>Houston TX 77027<br>713-333-5540

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

**09/08/2025**

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

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JCP Investment Partnership, LP** | Name of reporting person<br>**JCP Investment Partnership, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**455717.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**455717.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.9%** | Percent of class represented by amount in Row (11)<br>**0.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JCP Investment Partners, LP** | Name of reporting person<br>**JCP Investment Partners, LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**455717.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**455717.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.9%** | Percent of class represented by amount in Row (11)<br>**0.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JCP Investment Holdings, LLC** | Name of reporting person<br>**JCP Investment Holdings, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**455717.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**455717.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | Aggregate amount beneficially owned by each reporting person<br>**455717.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.9%** | Percent of class represented by amount in Row (11)<br>**0.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JCP Investment Management, LLC** | Name of reporting person<br>**JCP Investment Management, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**829491.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**829491.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**829491.00** | Aggregate amount beneficially owned by each reporting person<br>**829491.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.6%** | Percent of class represented by amount in Row (11)<br>**1.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IA** | Type of Reporting Person (See Instructions)<br>**IA** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Pappas James C** | Name of reporting person<br>**Pappas James C** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**829491.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**829491.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**829491.00** | Aggregate amount beneficially owned by each reporting person<br>**829491.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.6%** | Percent of class represented by amount in Row (11)<br>**1.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Jumana Capital Investments LLC** | Name of reporting person<br>**Jumana Capital Investments LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4000000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4000000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4000000.00** | Aggregate amount beneficially owned by each reporting person<br>**4000000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**7.8%** | Percent of class represented by amount in Row (11)<br>**7.8%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **24869P104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Martin Christopher Ross** | Name of reporting person<br>**Martin Christopher Ross** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4000000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4000000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4000000.00** | Aggregate amount beneficially owned by each reporting person<br>**4000000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**7.8%** | Percent of class represented by amount in Row (11)<br>**7.8%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, $0.01 par value

**(b) Name of Issuer:**
DENNY'S Corp

**(c) Address of Issuer's Principal Executive Offices:**
203 EAST MAIN STREET, SPARTANBURG, SC, 29319

**Item 4. Purpose of Transaction**

The Reporting Persons purchased the Shares based on the Reporting Persons' belief that the Shares, when purchased, were undervalued and represented an attractive investment opportunity. Depending upon overall market conditions, other investment opportunities available to the Reporting Persons, and the availability of Shares at prices that would make the purchase or sale of Shares desirable, the Reporting Persons may endeavor to increase or decrease their position in the Issuer through, among other things, the purchase or sale of Shares on the open market or in private transactions or otherwise, on such terms and at such times as the Reporting Persons may deem advisable.

The Reporting Persons intend to engage in discussions with management and the Board of Directors (the "Board") of the Issuer regarding opportunities to enhance stockholder value, and believe there is a significant opportunity for the Issuer to increase its earnings over the coming years.

No Reporting Person has any present plan or proposal which would relate to or result in any of the matters set forth in subparagraphs (a) - (j) of Item 4 of Schedule 13D except as set forth herein or such as would occur upon or in connection with completion of, or following, any of the actions discussed herein. The Reporting Persons intend to review their investment in the Issuer on a continuing basis. Depending on various factors including, without limitation, the Issuer's financial position and investment strategy, the price levels of the Shares, conditions in the securities markets and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, engaging in additional communications with management and the Board of the Issuer, engaging in discussions with stockholders of the Issuer or third parties, including potential acquirers and service providers, about the Issuer and the Reporting Persons' investment, making proposals to the Issuer concerning changes to the capital allocation strategy, capitalization, ownership structure, including a sale of the Issuer as a whole or in parts, Board structure (including Board composition) or operations of the Issuer, purchasing additional Shares, selling some or all of their Shares, engaging in short selling of or any hedging or similar transaction with respect to the Shares, or changing their intention with respect to any and all matters referred to in Item 4.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The aggregate percentage of Shares reported owned by each person named herein is based upon 51,498,994 Shares outstanding as of July 30, 2025, which is the total number of Shares outstanding as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 4, 2025.

As of the date hereof, JCP Partnership beneficially owned 455,717 Shares, constituting approximately 0.9% of the Shares outstanding. JCP Partners, as the general partner of JCP Partnership, may be deemed the beneficial owner of the 455,717 Shares owned by JCP Partnership, constituting approximately 0.9% of the Shares outstanding. JCP Holdings, as the general partner of JCP Partners, may be deemed the beneficial owner of the 455,717 Shares owned by JCP Partnership, constituting approximately 0.9% of the Shares outstanding.

As of the date hereof, 373,774 Shares were held in the JCP Accounts, constituting approximately 0.7% of the Shares outstanding. JCP Management, as the investment manager of JCP Partnership and the JCP Accounts, may be deemed the beneficial owner of the (i) 455,717 Shares owned by JCP Partnership and (ii) 373,774 Shares held in the JCP Accounts, constituting approximately 1.6% of the Shares outstanding. Mr. Pappas, as the managing member of JCP Management and sole member of JCP Holdings, may be deemed the beneficial owner of the (i) 455,717 Shares owned by JCP Partnership and (ii) 373,774 Shares held in the JCP Accounts, constituting approximately 1.6% of the Shares outstanding.

As of the date hereof, Jumana Capital beneficially owned 4,000,000 Shares, including 785,000 Shares underlying certain call options that are currently exercisable, constituting approximately 7.8% of the Shares outstanding. Mr. Martin, as the Manager of Jumana Capital, may be deemed the beneficial owner of the 4,000,000 Shares owned by Jumana Capital, constituting approximately 7.8% of the Shares outstanding.

Each Reporting Person may be deemed to be a member of a "group" with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and such group may be deemed to beneficially own the 4,829,491 Shares owned in the aggregate by all of the Reporting Persons, constituting approximately 9.4% of the outstanding Shares. The filing of this Schedule 13D shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Exchange Act, the beneficial owners of any securities of the Issuer he or it does not directly own. Each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein that he or it does not directly own.

**(b)**
Each of JCP Partnership, JCP Partners, JCP Holdings, JCP Management and Mr. Pappas may be deemed to share the power to vote and dispose of the Shares owned by JCP Partnership.

Each of JCP Management and Mr. Pappas may be deemed to share the power to vote and dispose of the Shares held in the JCP Accounts.

Each of Jumana Capital and Mr. Martin may be deemed to share the power to vote and dispose of the Shares directly beneficially owned by Jumana Capital.

**(c)**
The transactions in the securities of the Issuer by the Reporting Persons during the past 60 days are set forth in Exhibit 1 and are incorporated herein by reference. All of such transactions were effected in the open market unless otherwise noted therein.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Jumana Capital has sold short exchange-listed put options referencing an aggregate of 37,500 Shares, which have an exercise price of $5 per Share and an expiration date of September 19, 2025.

Jumana Capital has purchased exchange-listed call options referencing an aggregate of 75,000 Shares, which have an exercise price of $5 per Share and an expiration date of September 19, 2025.

Jumana Capital has purchased exchange-listed call options referencing an aggregate of 660,000 Shares, which have an exercise price of $5 per Share and an expiration date of November 21, 2025.

Jumana Capital has sold short exchange-listed put options referencing an aggregate of 120,000 Shares, which have an exercise price of $5 per Share and an expiration date of February 20, 2026.

Jumana Capital has purchased exchange-listed call options referencing an aggregate of 50,000 Shares, which have an exercise price of $5 per Share and an expiration date of February 20, 2026.

Jumana Capital has sold short exchange-listed put options referencing an aggregate of 2,150,000 Shares, which have an exercise price of $5 per Share and an expiration date of May 15, 2026.

On September 8, 2025, the Reporting Persons entered into a Group Agreement (the "Group Agreement") pursuant to which the parties agreed, among others things, (i) to form a group with respect to coordinating their activities with respect to the Issuer and its securities, (ii) to separately or jointly file Schedule(s) 13D and any amendments thereto with respect to the securities of the Issuer to the extent required by applicable law, and (iii) that expenses incurred in connection with the group's activities would be split among JCP and Jumana, with JCP paying 20% of the expenses and Jumana paying 80% of the expenses. The foregoing description of the Group Agreement is not complete and is qualified in its entirely by reference to the full text of the Group Agreement, which is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

Other than as described herein, there are no contracts, arrangements, understandings or relationships among the Reporting Persons, or between the Reporting Persons and any other person, with respect to the securities of the Issuer.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JCP Investment Partnership, LP

**Signature:** /s/ James C. Pappas

**Name/Title:** James C. Pappas, Managing Member of JCP Investment Management, LLC, its Investment Manager

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JCP Investment Partners, LP

**Signature:** /s/ James C. Pappas

**Name/Title:** James C. Pappas, Sole Member of JCP Investment Holdings, LLC, its General Partner

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JCP Investment Holdings, LLC

**Signature:** /s/ James C. Pappas

**Name/Title:** James C. Pappas, Sole Member

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JCP Investment Management, LLC

**Signature:** /s/ James C. Pappas

**Name/Title:** James C. Pappas, Managing Member

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Pappas James C

**Signature:** /s/ James C. Pappas

**Name/Title:** James C. Pappas

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Jumana Capital Investments LLC

**Signature:** /s/ Christopher R. Martin

**Name/Title:** Christopher R. Martin, Manager

**Date:** 09/15/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Martin Christopher Ross

**Signature:** /s/ Christopher R. Martin

**Name/Title:** Christopher R. Martin

**Date:** 09/15/2025