# EDGAR Filing Document

**Accession Number:** 0001844862
**File Stem:** 0001104659-25-092517
**Filing Date:** 2025-9
**Character Count:** 12619
**Document Hash:** a13d0363aa28fec7cd41f834a96f6d1e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-092517.hdr.sgml**: 20250923

**ACCESSION NUMBER**: 0001104659-25-092517

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250923

**DATE AS OF CHANGE**: 20250923

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Solid Power, Inc.
- **CENTRAL INDEX KEY:** 0001844862
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 861888095
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92522
- **FILM NUMBER:** 251333806

**BUSINESS ADDRESS:**
- **STREET 1:** 486 S. PIERCE AVE., SUITE E
- **CITY:** LOUISVILLE
- **STATE:** CO
- **ZIP:** 80027
- **BUSINESS PHONE:** (303) 219-0720

**MAIL ADDRESS:**
- **STREET 1:** 486 S. PIERCE AVE., SUITE E
- **CITY:** LOUISVILLE
- **STATE:** CO
- **ZIP:** 80027

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Decarbonization Plus Acquisition Corp III
- **DATE OF NAME CHANGE:** 20210208
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LEUSCHEN DAVID M
- **CENTRAL INDEX KEY:** 0001222726

**ORGANIZATION NAME:**

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

**MAIL ADDRESS:**
- **STREET 1:** C/O RIVERSTONE HOLDINGS
- **STREET 2:** 712 FIFTH AVENUE, 36TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 2)**

**SOLID POWER, INC.**

*(Name of Issuer)*

**Common Stock, par value $0.0001**

*(Title of Class of Securities)*

**83422N105**

*(CUSIP Number)*

**Christina Shalhoub**<br>c/o Riverstone Holdings LLC<br>712 Fifth Avenue, 36th Floor<br>New York NY 10019<br>212-993-0076

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

**09/19/2025**

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

| **CUSIP No.** | **83422N105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**David M. Leuschen** | Name of reporting person<br>**David M. Leuschen** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 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>**1745546.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4958757.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**1745546.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4958757.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6704303.00** | Aggregate amount beneficially owned by each reporting person<br>**6704303.00** | |
| 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>**3.62%** | Percent of class represented by amount in Row (11)<br>**3.62%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The amounts in Rows (8), (10) and (11) include 4,006,860 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.

The percentage in Row (13) is based on 185,291,240 shares of the Issuer's Common Stock, which includes (i) 181,284,380 shares of the Issuer's Common Stock, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 7, 2025, and (ii) 4,006,860 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.

| **CUSIP No.** | **83422N105** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Pierre F. Lapeyre, Jr.** | Name of reporting person<br>**Pierre F. Lapeyre, Jr.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 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>**4051937.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4958757.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**4051937.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4958757.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**9010694.00** | Aggregate amount beneficially owned by each reporting person<br>**9010694.00** | |
| 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>**4.81%** | Percent of class represented by amount in Row (11)<br>**4.81%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The amounts in Rows (7), (9) and (11) include 2,044,171 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.

The amounts in Rows (8) and (10) include 4,006,860 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.

The percentage in Row (13) is based on 187,335,411 shares of the Issuer's Common Stock, which includes (i) 181,284,380 shares of the Issuer's Common Stock, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 7, 2025, and (ii) 6,051,031 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.0001

**(b) Name of Issuer:**
SOLID POWER, INC.

**(c) Address of Issuer's Principal Executive Offices:**
486 S. PIERCE AVE., SUITE E, Louisville, CO, 80027

This Amendment No. 2 to Schedule 13D (this "Amendment No. 2") amends and supplements the Schedule 13D originally filed with the United States Securities and Exchange Commission (the "SEC") on March 1, 2023 (as amended by Amendment No. 1 thereto ("Amendment No. 1") originally filed with the SEC on August 21, 2025, the "Schedule 13D"), with respect to the common stock, par value $0.0001 per share ("Common Stock"), of Solid Power, Inc. Except as indicated in this Amendment No. 2, all other information as to the Reporting Persons set forth in the Schedule 13D remains unchanged and capitalized terms used herein that are not defined herein have the same meanings as set forth in the Schedule 13D.

The Reporting Persons have engaged in transactions since August 21, 2025, which represented a decrease in David M. Leuschen's and Pierre F. Lapeyre, Jr.'s respective beneficial ownership of Common Stock of more than 1% of the total number of shares of Common Stock outstanding. See Item 3 below for further detail regarding these transactions.

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

**(a)**
Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows:

The ownership information presented below represents beneficial ownership of shares of Common Stock of the Issuer as of September 23, 2025, based upon (i) with respect to Mr. Leuschen, 185,291,240 shares of the Issuer's Common Stock, which includes (x) 181,284,380 shares of the Issuer's Common Stock, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 7, 2025 and (y) 4,006,860 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable and (ii) with respect to Mr. Lapeyre, 187,335,411 shares of the Issuer's Common Stock, which includes (x) 181,284,380 shares of the Issuer's Common Stock, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on August 7, 2025 and (y) 6,051,031 shares of the Issuer's Common Stock which may be purchased by exercising warrants that are presently exercisable.
                                                                                                                                           Shared
                                                                                               Shared      Sole power        power to
                                                                      Sole power      power to    to dispose or    dispose or to
                                    Amount                     to vote or to    vote or to     to direct the       direct the
                                 beneficially  Percent of   direct the       direct the     disposition      disposition
Reporting Person        owned        class:         vote:               vote:                 of:                    of:
David M. Leuschen    6,704,303     3.62%     1,745,546       4,958,757      1,745,546       4,958,757
Pierre F. Lapeyre, Jr. 9,010,694     4.81%     4,051,937       4,958,757      4,051,937       4,958,757

Sponsor is the record holder of 951,897 shares of Common Stock and 4,006,860 Private Placement Warrants that are presently exercisable. Mr. Leuschen and Mr. Lapeyre are the managing directors of Riverstone, which is the sole and managing member of Sponsor Manager, which is the managing member of Sponsor. As a result, Mr. Leuschen and Mr. Lapeyre each may be deemed to share beneficial ownership of the shares held by Sponsor. Each such person or entity disclaims any such beneficial ownership.

Mr. Leuschen is the record holder of 1,745,546 shares of Common Stock.

Mr. Lapeyre is the record holder of 72,046 shares of Common Stock and 401,131 Private Placement Warrants that are presently exercisable. Additionally, Mr. Lapeyre may be deemed to beneficially own 1,935,720 shares of Common Stock and 1,643,040 Private Placement Warrants that are presently exercisable held by estate planning vehicles for which he serves as investment manager.

**(b)**
The information from the response in subpart (a) of this section is incorporated by reference herein.

**(c)**
Except as described in Item 3 of this Amendment No. 2, the Reporting Persons have not engaged in any transaction involving securities of the Issuer since the filing of Amendment No. 1.

### 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:** David M. Leuschen

**Signature:** /s/ Thomas Smith, attorney-in-fact

**Name/Title:** David M. Leuschen

**Date:** 09/23/2025

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:** Pierre F. Lapeyre, Jr.

**Signature:** /s/ Thomas Smith, attorney-in-fact

**Name/Title:** Pierre F. Lapeyre, Jr.

**Date:** 09/23/2025