# EDGAR Filing Document

**Accession Number:** 0001070494
**File Stem:** 0001209191-23-008874
**Filing Date:** 2023-2
**Character Count:** 6363
**Document Hash:** ccda9db6d870ddf4979d17bc727ab00d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001209191-23-008874.hdr.sgml**: 20230213

**ACCESSION NUMBER**: 0001209191-23-008874

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230201

**FILED AS OF DATE**: 20230213

**DATE AS OF CHANGE**: 20230213

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Williamson Douglas J
- **CENTRAL INDEX KEY:** 0001911501

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-50768
- **FILM NUMBER:** 23620823

**MAIL ADDRESS:**
- **STREET 1:** AVADEL PHARMACEUTICALS PLC
- **STREET 2:** 10 EARLSFORT TERRACE
- **CITY:** DUBLIN
- **STATE:** L2
- **ZIP:** D02 T390
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ACADIA PHARMACEUTICALS INC
- **CENTRAL INDEX KEY:** 0001070494
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 061376651
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3611 VALLEY CENTRE DRIVE
- **STREET 2:** SUITE 300
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130
- **BUSINESS PHONE:** 858-558-2871

**MAIL ADDRESS:**
- **STREET 1:** 3611 VALLEY CENTRE DRIVE
- **STREET 2:** SUITE 300
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92130

## Ex-24

```
<PRE>
POWER OF ATTORNEY

	Know all by these presents, that the undersigned hereby authorizes each of
Austin D. Kim, Peter Chae, James K. Kihara or Martin Choy to execute for and on
behalf of the undersigned, in the undersigned's capacity as an officer of Acadia
Pharmaceuticals Inc. (the "Company"), Forms 3, 4 and 5 and any Amendments
thereto, and cause such form(s) to be filed with the Securities and Exchange
Commission pursuant to Section 16(a) of the Securities Exchange Act of 1934,
relating to the undersigned's beneficial ownership of securities in the Company.
 The undersigned hereby grants to such attorney-in-fact full power and authority
to do and perform any and every act and thing whatsoever requisite, necessary,
or proper to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as the undersigned might or could
do if personally present, with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact, or substitute or
substitutes of such attorney-in-fact, shall lawfully do or cause to be done by
virtue of this power of attorney and the rights and powers herein granted.  The
undersigned acknowledges that the foregoing attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with Section 16 of
the Securities Exchange Act of 1934.

	This Power of Attorney shall remain in full force and effect until the earliest
to occur of (a) the undersigned is no longer required to file Forms 3, 4 and 5
with respect to the undersigned's holdings of and transactions in securities
issued by the Company, (b) revocation by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact or (c) as to any attorney-in-fact
individually, until such attorney-in-fact shall no longer be employed by the
Company.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed this 24th day of January 2023.

							/s/ Douglas J. Williamson
							Douglas J. Williamson
</PRE>
```

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Williamson Douglas J<br><sub>(Last) (First) (Middle)</sub><br>C/O ACADIA PHARMACEUTICALS INC.<br>12830 EL CAMINO REAL, SUITE 400<br><sub>(Street)</sub><br>SAN DIEGO, CA 92130<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>ACADIA PHARMACEUTICALS INC [ ACAD ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2023-02-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Executive VP, Research & Dev_ | **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 Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Signature:** /s/ Austin D. Kim, Attorney-in-Fact  
**Date:** 2023-02-13

### Remarks:

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

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

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

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

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