# EDGAR Filing Document

**Accession Number:** 0001820693
**File Stem:** 0000899243-23-005890
**Filing Date:** 2023-2
**Character Count:** 7093
**Document Hash:** 41300723173755cd10cfe9e849b27af4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000899243-23-005890.hdr.sgml**: 20230222

**ACCESSION NUMBER**: 0000899243-23-005890

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230222

**FILED AS OF DATE**: 20230222

**DATE AS OF CHANGE**: 20230222

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Aaker Jennifer
- **CENTRAL INDEX KEY:** 0001820693

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40731
- **FILM NUMBER:** 23655465

**MAIL ADDRESS:**
- **STREET 1:** C/O CODEXIS, INC.
- **STREET 2:** 200 PENOBSCOT DRIVE
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94063
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Decarbonization Plus Acquisition Corp IV
- **CENTRAL INDEX KEY:** 0001848959
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2744 SAND HILL ROAD
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025
- **BUSINESS PHONE:** (212) 993-0076

**MAIL ADDRESS:**
- **STREET 1:** 2744 SAND HILL ROAD
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Aaker Jennifer<br><sub>(Last) (First) (Middle)</sub><br>C/O DECARBONIZATION PLUS ACQ CORP. IV<br>2744 SAND HILL ROAD, SUITE 100<br><sub>(Street)</sub><br>MENLO PARK, CA 94025<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-22 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Decarbonization Plus Acquisition Corp IV [ DCRD ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B Common Shares | <sup>(1)(2)</sup> | 2023-02-22 |  | D |  |  | 18698 | <sup>(1)(2)</sup> | <sup>(1)(2)</sup> | Class A Common Shares | 18698 | <sup>(1)(2)</sup> | 0 | D |  |

---

### Footnotes:

(1) In connection with the closing of the business combination (the "Business Combination") between Decarbonization Plus Acquisition Corporation IV ("DCRD"), Hammerhead Resources Inc., an Alberta corporation ("Hammerhead"), Hammerhead Energy Inc., an Alberta corporation and wholly owned subsidiary of Hammerhead ("NewCo"), and 2453729 Alberta ULC, an Alberta unlimited liability corporation and wholly owned subsidiary of DCRD, on February 21, 2023, DCRD transferred by way of continuation from the Cayman Islands to the Province of Alberta, Canada in accordance with the Cayman Islands Companies Act (as amended) and domesticated as an Alberta corporation in accordance with the applicable provisions of the Business Corporations Act (Alberta) (such transfer by way of continuation and domestication, the "Domestication").

(2) (Continued from footnote 1) Pursuant to the Domestication, each Class B ordinary share of DCRD was exchanged for one Class B common share of DCRD ("DCRD Class B Common Share"). Following the Domestication, on February 22, 2023, DCRD amalgamated with NewCo (the "SPAC Amalgamation") to form one corporate entity ("New SPAC") with NewCo surviving the SPAC Amalgamation as New SPAC. Pursuant to the SPAC Amalgamation, each DCRD Class B Common Share issued and outstanding immediately prior to the effective time of the SPAC Amalgamation was exchanged, on a one-for-one basis, for a Class B common share in the authorized share capital of New SPAC.

**Signature:** Jennifer Aaker, /s/ Peter Haskopoulos, Attorney-in-fact  
**Date:** 2023-02-22

### Remarks:

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

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

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

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

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