Exhibit 19.1

ACADIA PHARMACEUTICALS INC.

Insider Trading Policy

(Adopted November 13, 2024)

Introduction

During the course of your relationship with Acadia Pharmaceuticals Inc. (the “Company,” “we,” “us” or “our”), you may receive material information that is not yet publicly available (“material nonpublic information”) about the Company or other publicly traded companies that the Company has business relationships with. Material nonpublic information may give you, or someone you pass that information on to, a leg up over others when deciding whether to buy, sell or otherwise transact in the Company securities or the securities of another publicly traded company. This policy sets forth guidelines with respect to transactions in the Company securities and in the securities of other applicable publicly traded companies, in each case, by the Company’s employees and directors, as well as the Company’s consultants who are advised that they are subject to this policy or who may become aware of material nonpublic information (“designated consultants”), and any other persons or entities subject to the provisions of this policy as described below.

Statement of Policy

It is the policy of the Company that an employee, director or designated consultant of the Company (or any other person or entity subject to this policy) who is aware of material nonpublic information relating to the Company may not, directly or indirectly:

The prohibition against insider trading is absolute. It applies even if the decision to trade is not based on such material nonpublic information. It also applies to transactions that may be necessary or justifiable for independent reasons (such as the need to raise money for an emergency expenditure) and also to very small transactions. All that matters is whether you are aware of any material nonpublic information relating to the Company at the time of the transaction.

The U.S. federal securities laws do not recognize any mitigating circumstances to insider trading. In addition, even the appearance of an improper transaction must be avoided to preserve the Company’s reputation for adhering to the highest standards of conduct. In some circumstances, you may need to forgo a planned transaction even if you planned it before becoming aware of the material nonpublic information. So, even if you believe you may suffer an economic loss or sacrifice an anticipated profit by waiting to trade, you must wait.

It is also important to note that the laws prohibiting insider trading are not limited to trading by the insider alone; advising others to trade on the basis of material nonpublic information is illegal and squarely prohibited by this policy. Liability in such cases can extend both to the “tippee”—the person to whom the insider disclosed material nonpublic information—and to the “tipper”—the insider. In such cases, you can be held liable for your own transactions, as well as the transactions by a tippee and even the transactions of a tippee’s tippee. For these and other reasons, it is the policy of the Company that no employee, director or designated consultant of the Company (or any other person or entity subject to this policy) may either (a) recommend to another person or entity that they buy, hold or sell the Company securities at any time when in possession of material nonpublic information or (b) disclose material nonpublic information to persons within the Company whose jobs do not require them to have that information, or outside of the Company to other persons (unless the disclosure is made in accordance with the Company’s policies regarding the protection or authorized external disclosure of information regarding the Company).

In addition, it is the policy of the Company that no person subject to this policy who, in the course of such person’s relationship with the Company, learns of any confidential information that is material to another publicly traded company, including but not limited to, a supplier, partner or collaborator of the Company or an economically-linked company such as a competitor of the Company, may trade in that other company’s securities until the information becomes public or is no longer material to that other company.

There are no exceptions to this policy, except as specifically noted above or below.

Transactions Subject to this Policy

This policy applies to all transactions in securities issued by the Company, as well as derivative securities that are not issued by the Company, such as exchange-traded put or call options or swaps relating to the Company securities. Accordingly, for purposes of this policy, the terms “trade,” “trading” and “transactions” include not only purchases and sales of the Company’s common stock in the public market but also any other purchases, sales, transfers, gifts or other acquisitions and dispositions of common or preferred equity, options, warrants and other securities (including debt securities) and other arrangements or transactions that affect economic exposure to changes in the prices of these securities.

Persons Subject to this Policy

This policy applies to you and all other employees, directors and designated consultants of the Company and its subsidiaries. This policy also applies to members of your family who reside with you, any other persons with whom you share a household, any family members who do not live in your household but whose transactions in the Company securities are directed by you or are subject to your influence or control and any other individuals or entities whose transactions in securities you influence, direct or control. However, this Policy does not apply to any entity that you influence, direct or control if such entity invests in securities in the ordinary course of its business (e.g., a venture or other investment fund), provided that such entity has established its own insider trading controls and procedures in compliance with applicable securities laws. The foregoing persons who are deemed subject to this policy are referred to in this policy as “Related Persons.” You are responsible for making sure that your Related Persons comply with this policy.

Material Nonpublic Information

Material information

It is not always easy to figure out whether you are aware of material nonpublic information. But there is one important factor to determine whether nonpublic information you know about a public company is material: whether the information could be expected to affect the market price of that company’s securities

or to be considered important by investors who are considering trading that company’s securities. If the information makes you want to trade, it would probably have the same effect on others. Keep in mind that both positive and negative information can be material.

There is no bright-line standard for assessing materiality; rather, materiality is based on an assessment of all of the facts and circumstances, and is often evaluated by relevant enforcement authorities with the benefit of hindsight. Depending on the specific details, the following items may be considered material nonpublic information until publicly disclosed within the meaning of this policy. There may be other types of information that would qualify as material information as well; use this list merely as a non-exhaustive guide:

When information is considered public

The prohibition on trading when you have material nonpublic information lifts once that information becomes publicly disseminated. But for information to be considered publicly disseminated, it must be widely disseminated through a press release, a filing with the Securities and Exchange Commission (the “SEC”), or other widely disseminated announcement. Once information is publicly disseminated, it is still necessary to afford the investing public with sufficient time to absorb the information. For persons subject to this policy, information will be considered publicly disseminated for purposes of this policy only after one full trading day has elapsed since the information was publicly disclosed. For example, if we announce material nonpublic information before trading begins on Thursday, then you may execute a transaction in our securities on Friday; if we announce material nonpublic information after trading ends on Thursday, then you may execute a transaction in our securities on Monday. Depending on the particular circumstances, the Company may determine that a longer waiting period should apply to the release of specific material nonpublic information.

Quarterly Trading Blackouts

Because our workplace culture tends to be open, odds are that most of our employees, directors and designated consultants will possess material nonpublic information at certain points during the year. To

minimize even the appearance of improper trading, we have established “quarterly trading blackout periods” during which Covered Insiders (as defined below) and their Related Persons—regardless of whether they are aware of material nonpublic information or not—may not conduct any trades in the Company securities. As used in this policy, “Covered Insider” means each of the Company’s and its subsidiaries’ (i) officers, (ii) directors, (iii) employees designated in writing from time to time by the Company’s Chief Executive Officer, Chief Financial Officer, Chief Legal Officer or one or more individuals designated by any such officers (each, a “Trading Compliance Officer”) and (iv) consultants designated by a Trading Compliance Officer from time to time. That means that, except as described in this policy, all Covered Insiders and their Related Persons will be able to trade in the Company securities only during limited open trading window periods that generally will begin after one full trading day has elapsed since the public dissemination of the Company’s annual or quarterly financial results and end at the beginning of the next quarterly trading blackout period. Of course, even during an open trading window period, you may not (unless an exception applies) conduct any trades in the Company securities if you are otherwise in possession of material nonpublic information.

For purposes of this policy, each “quarterly trading blackout period” will begin at the end of the day that is two weeks before the end of each fiscal quarter and end after one full trading day has elapsed since the public dissemination of the Company’s financial results for that quarter. Please note that the quarterly trading blackout period may commence early or may be extended if, in the judgment of a Trading Compliance Officer, there exists undisclosed information that would make trades by Covered Insiders or their Related Persons inappropriate. It is important to note that the fact that the quarterly trading blackout period has commenced early or has been extended should be considered material nonpublic information that should not be communicated to any other person.

A Covered Insider who believes that special circumstances require such person or such person’s Related Persons to trade during a quarterly trading blackout period should consult the Chief Legal Officer or, if the Chief Legal Officer is not available, another Trading Compliance Officer. Permission to trade during a quarterly trading blackout period will be granted only where the circumstances are extenuating, a Trading Compliance Officer concludes that the person is not in fact aware of any material nonpublic information relating to the Company or its securities (whether through certification by the Covered Insider or otherwise, in the discretion of the Trading Compliance Officer), and there appears to be no significant risk that the trade may subsequently be questioned.

Event-Specific Trading Blackouts

From time to time, an event may occur that is material to the Company and is known by only a few directors, officers and/or employees. So long as the event remains material and nonpublic, the persons designated by a Trading Compliance Officer may not trade in the Company securities. In that situation, the Company will notify the designated individuals that neither they nor their Related Persons may trade in the Company securities. The existence of an event-specific trading blackout should also be considered material nonpublic information and should not be communicated to any other person. Even if you have not been designated as a person who should not trade due to an event-specific trading blackout, you should not trade while aware of material nonpublic information. Exceptions will not be granted during an event-specific trading blackout.

The quarterly and event-driven trading blackouts do not apply to those transactions to which this policy does not apply, as described under the heading “Exceptions to this Policy” below.

Exceptions to this Policy

This policy does not apply in the case of the following transactions, except as specifically noted:

Special and Prohibited Transactions

Pre-Clearance and Advance Notice of Transactions

In addition to the requirements above, even during an open trading window, Covered Insiders may not engage in any transaction in, or enter into, modify or terminate any contract, instruction or written plan or arrangement in, the Company securities without first obtaining pre-clearance from a Trading Compliance Officer. A Trading Compliance Officer will then determine whether the person seeking pre-clearance may proceed with the proposed transaction and, if so, will direct the Compliance Coordinator (as identified in the Company’s Section 16 Compliance Program) to help comply with any required reporting requirements under Section 16(a) of the Exchange Act. Pre-cleared transactions not completed within five business days will require new pre-clearance, subject to the Company’s sole discretion to shorten such period of time.

Persons subject to pre-clearance must also give advance notice of their intent to gift the Company securities or to exercise an outstanding stock option to the Company’s Chief Legal Officer and another Trading Compliance Officer. To the extent possible, a person subject to pre-clearance must give advance

notice to the Company’s Chief Legal Officer and another Trading Compliance Officer with respect to transactions to be effected pursuant to a 10b5-1 Trading Plan. Once any transaction takes place, each officer or director must immediately notify the Compliance Coordinator and any other individuals identified under the heading “Notification of Execution of Transaction” (or similar heading) in the Company’s Section 16 Compliance Program as in effect from time to time so that the Company may assist in any reporting obligations under Section 16(a) of the Exchange Act.

Short-Swing Trading, Control Stock and Section 16 Reports

The Company’s officers subject to Section 16 of the Exchange Act and directors should take care to avoid short-swing transactions (within the meaning of Section 16(b) of the Exchange Act) and the restrictions on sales by control persons (Rule 144 under the Securities Act of 1933, as amended), and should file all appropriate Section 16(a) reports (Forms 3, 4 and 5), which are described in the Company’s Section 16 Compliance Program as in effect from time to time, and any notices of sale required by Rule 144.

Prohibition of Trading During Pension Plan Blackouts

Regulation Blackout Trading Restriction (“Regulation BTR”) under the Exchange Act states that no director or executive officer of the Company may, directly or indirectly, purchase, sell or otherwise transfer any equity security of the Company (other than an exempt security) during any “blackout period” (as defined in Regulation BTR) if a director or executive officer acquires or previously acquired such equity security in connection with such person’s service or employment as a director or executive officer. Because Regulation BTR is very complex, no director or executive officer of the Company should engage in any transactions in the Company securities, even if believed to be exempt from Regulation BTR, without first consulting with the Chief Legal Officer. The Company will notify each director and executive officer of any blackout periods in accordance with the provisions of Regulation BTR.

Policy’s Duration

This policy continues to apply to your transactions in the Company securities and the securities of other applicable public companies as more specifically set forth in this policy, even after your relationship with the Company has ended. If you are aware of material nonpublic information when your relationship with the Company ends, you may not trade the Company securities or the securities of other applicable publicly traded companies until the material nonpublic information has been publicly disseminated as discussed under the heading “Material Nonpublic Information—When information is considered public” above or is no longer material. Further, if you are a Covered Insider and you leave the Company during a trading blackout period, then you may not trade the Company securities or the securities of other applicable companies until the trading blackout period has ended. If you believe that special circumstances require you or a Related Person to trade during a quarterly trading blackout period, please follow the process described under the section titled “Quarterly Trading Blackouts” to seek permission to trade during a quarterly trading blackout period.

Individual Responsibility

Persons subject to this policy have ethical and legal obligations to maintain the confidentiality of information about the Company and to not engage in transactions in the Company securities or the securities of other applicable public companies while aware of material nonpublic information, as more specifically set forth in this policy. Each individual is responsible for making sure that he or she complies with this policy, and that any family member, household member or other Related Persons whose transactions are subject to this policy, as discussed under the heading “Persons Subject to this Policy” above, also comply with this policy. In all cases, the responsibility for determining whether an individual is aware of material nonpublic information rests with that individual, and any action on the part of the Company or any employee

or director of the Company pursuant to this policy (or otherwise) does not in any way constitute legal advice or insulate an individual from liability under applicable securities laws. You could be subject to severe legal penalties and disciplinary action by the Company for any conduct prohibited by this policy or applicable securities laws. See the section under the heading “Penalties” below.

Penalties

Anyone who engages in insider trading or otherwise violates this policy may be subject to both civil liability and criminal penalties. Violators also risk disciplinary action by the Company, including termination of employment. Anyone who has questions about this policy should contact their own attorney or the Company’s Chief Legal Officer at [email protected]. Please also see Frequently Asked Questions, which are attached to this policy as Annex A.

Amendments

The Company is committed to continuously reviewing and updating its policies and procedures. The Company’s Board of Directors (the “Board”), the Audit Committee of the Board or another authorized committee of the Board therefore reserves the right to amend, alter or terminate this policy at any time and for any reason. A current copy of the Company’s policies regarding insider trading may be obtained by contacting the Company’s Chief Legal Officer or at [email protected].

Annex A

Insider Trading Policy

Frequently Asked Questions

A: Generally speaking, insider trading is the buying or selling of stocks, bonds, futures or other securities by someone who possesses or is otherwise aware of material nonpublic information about the securities or the issuer of the securities. Insider trading also includes trading in derivatives (such as put or call options) where the price is linked to the underlying price of a company’s securities. It does not matter whether the decision to buy or sell was influenced by the material nonpublic information, how many shares you buy or sell, or whether it has an effect on the stock price. Bottom line: if, during the course of your relationship with the Company, you become aware of material nonpublic information about the Company and you trade in the Company securities, you have broken the law and violated our insider trading policy. In addition, our insider trading policy provides that, if in the course of your relationship with the Company, you learn of any nonpublic information that is material to another publicly traded company, including but not limited to, a supplier, partner or collaborator of the Company or an economically-linked company such as a competitor of the Company, you may not trade in that other company’s securities until the information becomes public or is no longer material to that other company. For example, if you learn of nonpublic information during the course of your relationship with the Company that could affect the stock price of a Company competitor, you may not trade in that competitor’s stock until the information becomes public or is no longer material.

A: If Company insiders are able to use their confidential knowledge to their financial advantage, other investors would not have confidence in the fairness and integrity of the market. The goal of requiring those who are aware of material nonpublic information to refrain from trading is to ensure that there is an even playing field.

A: Information is material if it would influence a reasonable investor to buy or sell a stock, bond, future or other security. This could mean many things: financial results, clinical or regulatory results, potential acquisitions or major contracts to name just a few. Information is nonpublic if it has not yet been publicly disseminated within the meaning of our insider trading policy.

A: Anyone who buys or sells a security while aware of material nonpublic information or provides material nonpublic information that someone else uses to buy or sell a security, may be guilty of insider trading. This applies to all individuals, including officers, directors and others who don’t even work at the Company. Regardless of who you are, if you know something material about the value of a security that not everyone knows and you trade (or convince someone else to trade) in that security, you may be found guilty of insider trading.

A: Yes, our insider trading policy is available to read on our intranet website.

A: The same rules apply to U.S. and foreign employees and consultants. The Securities and Exchange Commission (the U.S. government agency in charge of investor protection) and the Financial Industry Regulatory Authority (a private regulator that oversees U.S. securities exchanges) routinely investigate trading in a company’s securities conducted by individuals and firms based abroad. In addition, as a Company director, employee or designated consultant, our policies apply to you no matter where you work.

A: That is called “tipping.” You are the “tipper” and the other person is called the “tippee.” If the tippee buys or sells based on that material nonpublic information, both you and the “tippee” could be found guilty of insider trading. In fact, if you tell family members who tell others and those people then trade on the information, those family members and the “tippee” might be found guilty of insider trading too. To prevent this, you may not discuss material nonpublic information about the Company with anyone outside the Company, including spouses, family members, friends or business associates (unless the disclosure is made in accordance with the Company’s policies regarding the protection or authorized external disclosure of information regarding the Company). This includes anonymous discussions on the internet about the Company or companies with which the Company does business.

A: That is still tipping, and you can still be responsible for insider trading. When in possession of material nonpublic information, you may never recommend to another person that they buy, hold or sell the Company’s common stock or any derivative security related to the Company’s common stock, since that could be a form of tipping. Further, it is the Company’s policy that you never make recommendations to another person to buy, hold or sell any of the Company securities when you are in possession of material nonpublic information.

A: In addition to disciplinary action by the Company—which may include termination of employment—you may be liable for civil sanctions for trading on material nonpublic information. The sanctions may include return of any profit made or loss avoided as well as penalties of up to three times any profit made or any loss avoided. Persons found liable for tipping material nonpublic information, even if they did not trade themselves, may be liable for the amount of any profit gained or loss avoided by everyone in the chain of tippees as well as a penalty of up to three times that amount. In addition, anyone convicted of criminal insider trading could face prison and additional fines.

A: If you sell common stock or a related derivative security before negative news is publicly announced, and as a result of the announcement the stock price declines, you have avoided the loss caused by the negative news.

A: Yes, you may be restricted from doing so due to your awareness of material nonpublic information. U.S. insider trading laws generally restrict everyone aware of material nonpublic information about a company from trading in that company’s securities, regardless of whether the person is directly

connected with that company, except in limited circumstances. You should be particularly conscious of this restriction if, through your position at the Company, you sometimes obtain sensitive, material information about other companies and their business dealings with the Company. Please also refer to Question 1 above and our insider trading policy with respect to restrictions on trading in the securities of other public companies.

A: Not necessarily. Even if you do not violate U.S. law, you may still violate our policies. For example, employees and consultants may violate our policies by breaching their confidentiality obligations, even if these actions do not violate securities laws. Our policies are stricter than the law requires so that we and our employees and consultants can avoid even the appearance of wrongdoing. Therefore, please review the entire policy carefully.

A: If you are aware of material nonpublic information, you may not buy or sell our common stock until one full trading day has elapsed since the information was publicly disclosed. At that point, the information is considered publicly disseminated for purposes of our insider trading policy. For example, if we announce material nonpublic information before trading begins on Thursday, then you may execute a transaction in our securities on Friday; if we announce material nonpublic information after trading ends on Thursday, then you may execute a transaction in our securities on Monday. Even if you are not aware of any material nonpublic information, Covered Insiders and their Related Persons may not trade our common stock during any trading “blackout” period. Our insider trading policy describes the quarterly trading blackout period, and additional event-driven and other trading blackout periods may be communicated.

A: No, unless it is in connection with a 10b5-1 Trading Plan (see Question 27 below). If you are a Covered Insider and have any open orders when a blackout period commences other than in connection with a 10b5-1 Trading Plan, it is your responsibility to cancel these orders with your broker. If you are a Covered Insider and have an open order and it executes after a blackout period commences not in connection with a 10b5-1 Trading Plan, you will have violated our insider trading policy and may also have violated insider trading laws.

A: Under our policies, Covered Insiders and their Related Persons may not trade in derivative securities related to our common stock, which include publicly traded call and put options. In addition, under our policies, Covered Insiders and their Related Persons may not engage in short selling of our common stock at any time.

“Derivative securities” are securities other than common stock that are speculative in nature because they permit a person to leverage their investment using a relatively small amount of money. Examples of derivative securities include “put options” and “call options.” These are different from employee options and other equity awards granted under our equity compensation plans, which are not derivative securities for purposes of our policy.

“Short selling” is profiting when you expect the price of the stock to decline and includes transactions in which you borrow stock from a broker, sell it, and eventually buy it back on the market to return the borrowed shares to the broker. Profit is realized if the stock price decreases during the period of borrowing.

A: We and many other companies with volatile stock prices have adopted similar policies because such trading encourages irresponsible speculation – i.e., trying to benefit from a relatively low-cost method of trading on short-term swings in stock prices, without actually holding the underlying common stock. We are dedicated to building stockholder value; short selling our common stock conflicts with our values and would not be well-received by our stockholders.

A: Under our policies, you may not purchase our common stock on margin or hold it in a margin account at any time.

“Purchasing on margin” is the use of borrowed money from a brokerage firm to purchase our securities. Holding our securities in a margin account includes holding the securities in an account in which the shares can be sold to pay a loan to the brokerage firm.

A: Margin loans are subject to a margin call whether or not you possess material nonpublic information at the time of the call. If a margin call were to be made at a time when you were aware of material nonpublic information and you could not or did not supply other collateral, you may be liable under insider trading laws because of the sale of the securities (through the margin call). The sale would be attributed to you even though the lender made the ultimate determination to sell. The U.S. Securities and Exchange Commission takes the view that you made the determination to not supply the additional collateral and you are therefore responsible for the sale.

A: No. Pledging your shares as collateral for a personal loan could cause the pledgee to transfer your shares during a trading blackout period or when you are otherwise aware of material nonpublic information. As a result, you may not pledge your shares as collateral for a loan.

A: Hedging or monetization transactions, including through the use of financial instruments such as prepaid variable forwards, equity swaps, collars and exchange funds are prohibited by our insider trading policy for Covered Insiders and their Related Persons. Since such hedging transactions allow Covered Insiders and their Related Persons to continue to own the Company securities obtained through employee benefit plans or otherwise, but without the full risks and rewards of ownership, they may no longer have the same objectives as the Company’s other stockholders. Therefore, our insider trading policy prohibits Covered Insiders and their Related Persons from engaging in any such transactions.

A: Yes. You may exercise the options for cash (or, if permitted, via net exercise transaction with the Company) or by delivery to the Company of already-owned Company stock and receive shares, but you may not sell the shares (even to pay the exercise price or any taxes due) during a trading blackout period or any time that you are aware of material nonpublic information. To be clear, you may not effect a broker-assisted cashless exercise (these cashless exercise transactions include a market sale) during a trading blackout period or any time that you are aware of material nonpublic information.

A: It depends. If your employment with the Company ends during a trading blackout period, you will be subject to the remainder of that trading blackout period if you were a Covered Insider. If your employment with the Company ends on a day that the trading window is open, you will not be subject to the next trading blackout period. However, even if you are not subject to our trading blackout period after you leave the Company, you should not trade in the Company securities if you are aware of material nonpublic information. That restriction stays with you as long as the information you possess is material and not publicly disseminated within the meaning of our insider trading policy.

A: The same rules apply as for employee stock options. You may exercise the publicly traded options at any time, but you may not sell the securities at any time that you are aware of material nonpublic information and Covered Insiders may not sell the securities during a trading blackout period.

A: Yes.

A: No. You may trade in mutual funds holding the Company common stock at any time.

A: Yes, subject to the requirements discussed in our insider trading policy and any Rule 10b5-1 Trading Plan guidelines in effect from time to time. A routine trading program, also known as a 10b5-1 Trading Plan, allows you to set up a highly structured program with your stockbroker where you specify ahead of time the date, price, and amount of securities to be traded. If you wish to create a 10b5-1 Trading Plan, please contact our legal team at [email protected].

A: Violating our policies may result in disciplinary action, which may include termination of your employment or other relationship with the Company. In addition, you may be subject to criminal and civil sanctions.

A: You should contact our legal team at [email protected].