EX-19.1
Published on March 13, 2025
Exhibit 19.1
Sutro Biopharma, Inc. (collectively with its subsidiaries, the “Company”) is committed to promoting high standards of honest and ethical business conduct and compliance with laws, rules and regulations. As part of this commitment, the Company has adopted this Insider Trading Policy (as adopted and amended from time to time by the Board, this “Policy”) governing the purchase, sale and other dispositions of the Company’s securities by the individuals and entities covered by this policy to promote compliance with insider trading laws, rules and regulations, as well as applicable stock exchange listing standards. Under this Policy, every employee, contractor and consultant and member of the Board is prohibited from trading in Company securities while in possession of material nonpublic information (defined in Appendix A) about the Company, and is prohibited from giving material nonpublic information about the Company or others to anyone who might trade on the basis of that information.
You should also read the FAQs about this Policy in Appendix A to this Policy. The FAQs are part of this Policy and the rules articulated in the FAQs must be followed as well.
Neither the Company nor the Compliance Officer (as defined below) is liable for any act made under this Policy. Neither the Company nor the Compliance Officer is responsible for any failure to approve a trade or for imposing any Blackout Period (as defined below).
“10b5-1 Plan” means a written plan for selling or purchasing a predetermined number of shares of the Company that is entered into while a Covered Person is not in possession of material nonpublic information (MNPI) as contemplated in Rule 10b5-1.
“Blackout Period” means any trading blackout period specifically designated by the Compliance Officer. It may apply to particular individuals or groups of persons (including all Covered Persons), and last for such time as the Compliance Officer determines. No Covered Person may trade in Company securities during any such applicable Blackout Periods.
“Board” means the Company’s Board of Directors.
“Compliance Officer” means the Company’s General Counsel; provided that, in the event that the General Counsel is unavailable, the Company’s Chief Financial Officer or Chief Executive Officer will be authorized to serve as the Compliance Officer in the interim or to designate another person as the Compliance Officer.
“Covered Persons” refers to (a) all employees, contractors, consultants, advisors, and Board members of the Company, (b) the members of such persons’ immediate families (as defined below) residing with such persons, any other person in such persons’ households, any other family members whose transactions in Company securities are directed by such persons or subject to such persons’ influence or control and (c) venture capital funds and other entities (such as partnerships, trusts private equity, and corporations) that are affiliated or associated with such persons. An affiliate is someone who directly or indirectly controls or is controlled by, or is under common control with such person. An associate of a Covered Person is (x) a corporation or organization
Exhibit 19.1
(other than the Company or a majority-owned subsidiary of the Company) of which such person is an officer or partner or is directly or indirectly the beneficial owner of 10% or more of any class of equity securities or (y) any trust in which such person has a substantial beneficial interest or as to which such person serves as trustee or in a similar capacity.
“Exchange Act” means the Securities Exchange Act of 1934, as amended.
The term “immediate families” includes, but is not limited to, a Covered Person’s spouse, parents, children and siblings (whether biological, by marriage or adopted), or mothers and fathers-in-law, sons and daughters-in-law, brothers and sisters-in-law or anyone residing in such Covered Person’s home. Any question regarding whether a relationship qualifies as “immediate family” should be addressed to the Compliance Officer.
“Pre-clearance Persons” means persons, other than Section 16 Insiders, who have been designated by the Company as having regular access to material nonpublic information about the Company in the normal course of their duties. Special provisions of this Policy, such as pre-approval of any trades, apply to Pre-clearance Persons. The Pre-clearance Persons are listed on Appendix B to this Policy. The Compliance Officer may update and amend this list from time to time.
“SEC” means the U.S. Securities and Exchange Commission.
“Section 16 Insiders” means the Company’s officers (as defined in Rule 16a-1(f) of the Exchange Act) and directors, including the Company’s principal accounting officer (if separate from the Company’s principal financial officer). Special provisions of this Policy, such as pre-approval of any trades, and special SEC reporting requirements, apply to Section 16 Insiders.
“Securities Act” means the Securities Act of 1933, as amended.
This Policy covers all Covered Persons. All employees, contractors, consultants, advisors, and Board members of the Company are responsible for ensuring compliance with this Policy by members of their immediate families and other persons sharing their households, and by entities with which they are affiliated or associated.
This Policy applies to all transactions in Company securities, including shares of Company common stock, restricted stock units and options to purchase common stock, however acquired, and any other type of securities that the Company may issue, such as preferred stock, convertible notes, warrants or other derivative securities. Additionally, the Company will not transact in Company securities unless in compliance with U.S. securities laws.
The Company may impose sanctions for violation of this Policy and may issue stop-transfer orders to the Company’s transfer agent to implement this Policy. Sanctions for individuals may include any disciplinary action, including termination of employment with the Company, where applicable. Directors, Section 16 Insiders and/or Pre-clearance Persons may be required to certify
Exhibit 19.1
compliance with this Policy on an annual basis. Notifications and approvals required under this Policy may be provided by email.
Prohibited Activities
Exhibit 19.1
Section 16 Insiders and Pre-clearance Persons Require Prior Approval of Trades
The Section 16 Insiders and Pre-clearance Persons (as listed on Appendix B to this Policy), prior to trading the Company’s securities other than pursuant to a 10b5-1 Plan, must obtain prior approval of all trades in Company securities from the Compliance Officer by: (a) providing written notification of the amount and nature of the proposed trade, (b) certifying no earlier than two business days prior to the proposed trade that they have no material nonpublic information and, to their knowledge, will have no material nonpublic information as of the proposed trade date, and (c) receiving email confirmation from the Compliance Officer approving the trade, which approval can be granted or denied at the Compliance Officer’s discretion. Section 16 Insiders and Pre-clearance Persons may satisfy (a) and (b) by emailing the required information and certification to the Compliance Officer and must notify the Compliance Officer promptly via email of any changes to the certification in (b) prior to the proposed trade date. In addition, Section 16 Insiders must obtain approval by the Compliance Officer prior to any gifts or other transfers of Company securities.
We recommend Section 16 Insiders trade in the Company’s securities pursuant to a 10b5-1 Plan entered into in accordance with this policy.
Blackout Periods
Permitted Trades Under 10b5-1 Plans
Sales, purchases and other transfers of Company securities otherwise prohibited by this Policy may be permitted by a Covered Person if they are effected pursuant to a 10b5-1 Plan that meets the following requirements:
Exhibit 19.1
Approval of a 10b5-1 Plan by the Compliance Officer and/or an acknowledgement of a 10b5-1 Plan by the Company shall not be considered a determination by the Company or the Compliance Officer that the 10b5-1 Plan satisfies the requirements of Rule 10b5-1.
Once a person has an approved 10b5-1 Plan in place, such person will need approval from the Compliance Officer to make certain changes to it. Modifying or changing the amount, price, or timing of the purchase or sale of the Company’s securities underlying the 10b5-1 Plan (or a modification or change to a written formula or algorithm, or computer program that affects the amount, price, or timing of the purchase or sale of such securities) (any such modification or change, a “Plan Modification”) will be deemed to be the same as terminating such person’s
Exhibit 19.1
existing 10b5-1 Plan and entering into a new 10b5-1 Plan. As a result, the approval process for a Plan Modification is the same as the approval process for initially adopting a 10b5-1 Plan, including being subject to a new Cooling-Off Period. Making multiple Plan Modifications is discouraged by the Company, as that may give the appearance that a person is trading on material nonpublic information under the guise of that plan. Plan Modifications can not be made during any Blackout Period and only when a person not in possession of material nonpublic information. For other modifications to a 10b5-1 Plan, a person must notify the Compliance Officer of such modification in writing at least two business days prior to the modification and such modification must be approved by the Compliance Officer.
Once a 10b5-1 Plan is approved and in place, a person will need approval from the Compliance Officer to terminate it.
Unless otherwise approved by the Compliance Officer, all 10b5-1 Plans must be implemented through a broker approved by the Compliance Officer.
Priority of Statutory or Regulatory Trading Restrictions
The trading prohibitions and restrictions of this Policy are also subject to prohibitions or restrictions prescribed by contract or by federal and state securities laws and regulations (e.g., contractual restrictions on the resale of securities, short-swing trading by Section 16 Insiders or compliance with Rule 144 under the Securities Act). Any Covered Person who is uncertain whether other prohibitions or restrictions apply should ask the Compliance Officer.
Exceptions to Prohibited Activities
The trading restrictions of this Policy do not apply to the following:
Exhibit 19.1
The Compliance Officer (or the Compliance Officer designee(s)) will review, and either approve or prohibit, any proposed trades in Company securities by Section 16 Insiders and Pre-clearance Persons. The Compliance Officer will administer and interpret this Policy, and enforce compliance as needed. The Compliance Officer may consult with the Company’s outside legal counsel as needed. The Compliance Officer may designate one or more individuals who may perform the Compliance Officer’s duties in the event that the Compliance Officer is unable or unavailable to perform such duties.
Any Covered Person who violates this Policy or any federal or state laws governing insider trading or tipping, or knows of any such violation by any other Covered Person, must report the violation immediately to the Compliance Officer.
Please direct all inquiries about this Policy to the Compliance Officer.
The effective date of this Policy is February 23, 2023. The amendments to this Policy would not apply to any existing 10b5-1 Plan that was entered into prior to February 27, 2023, except to the extent that a Plan Modification is made to such plan after February 27, 2023.
Not applicable to this policy.
Exhibit 19.1
APPENDIX A
Frequently Asked Questions
What is “material nonpublic information?”
Information is “material” if it would be expected to affect the investment or voting decisions of a reasonable investor, or if the disclosure of the information would be expected to alter significantly the total mix of the information in the marketplace about the Company. In simple terms, material information is any type of information that could reasonably be expected to affect the market price of Company securities. Both positive and negative information may be material.
The following types of information about the Company (among others) would often be considered material:
Exhibit 19.1
The SEC has stated there is no fixed quantitative threshold amount for determining materiality, and that even very small quantitative changes can be qualitatively material if they would result in a movement in the price of the Company’s securities.
Information is “nonpublic” if it has not been widely disseminated to the public (e.g. through major newswire services, national news services, Forms 8-K and other filings with the SEC, webcasts or financial news services). For the purposes of this Policy, information will be considered public (i.e. no longer “nonpublic”) only after the open of trading on the second full trading day following the Company’s widespread public release of the information.
Covered Persons who are unsure whether the information that they possess is material or nonpublic are encouraged to consult the Compliance Officer for guidance.
What are the penalties for failing to comply with the Policy?
The consequences of prohibited insider trading or tipping can be severe. People who violate insider trading or tipping laws may be required to disgorge profits made or losses avoided by trading, pay the loss suffered by the persons who purchased securities from or sold securities to the insider tipper, pay civil penalties of up to three times the profit made or loss avoided, pay a criminal penalty of up to $5 million and serve a prison term of up to 20 years. The Company and/or the supervisors of the person violating the rules may also be required to pay major civil or criminal penalties and could under certain circumstances be subject to private lawsuits by contemporaneous traders for damages suffered as a result of illegal insider trading or tipping by persons under the Company’s control.
Violation of this Policy, or federal or state securities laws governing insider trading, may subject the violator to disciplinary action by the Company up to and including termination of employment for cause (in the case of an employee or further service in the case of a contractor) or removal (in the case of a Board member). A violation of this Policy is not necessarily the same as a violation of law. In fact, for the reasons indicated above, this Policy is intended to be broader than the law. The Company reserves the right to determine, in its own discretion and on the basis of the information available to it, whether this Policy has been violated. The Company may determine that specific conduct violates this Policy, whether or not the conduct also violates the law. It is not necessary for the Company to await the filing or conclusion of a civil or criminal action against the alleged violator before taking disciplinary action.
Are these FAQs part of the Insider Trading Policy?
Yes, these FAQs are part of the Policy, and you must comply with their provisions.
Exhibit 19.1
How does the Policy apply to trades under the Company’s Equity Award Plans and Employee Stock Purchase Plan?
The trading prohibitions and restrictions of this Policy do not apply to:
The trading prohibitions and restrictions of this Policy do apply to:
Sales of Company securities acquired under such plans are subject to this Policy.
The trading prohibitions and restrictions set forth in this Policy also do not apply to periodic wage withholding contributions by the Company or employees to the Company’s 2018 Employee Stock Purchase Plan or any successor employee stock purchase plan that are used to purchase Company securities pursuant to the employees’ advance instructions. Any sale of securities acquired under such plan is subject to the prohibitions and restrictions of this Policy. Covered Persons may make changes in elections under the ESPP during a Blackout Period.
Can I still exercise a stock option during a Blackout Period if I am not going to sell any shares?
Yes. For clarity, the exercise of a vested stock option which is not accompanied by a sale is not considered a “trade” under this Policy.
How does the Policy apply to tax withholding arrangements?
The trading prohibitions and restrictions of this Policy do apply to any elective tax withholding right made (i.e. pursuant to which an election has been made in advance, outside of a Blackout Period, to have the Company withhold shares subject to such awards to satisfy tax withholding requirements), as well as to any sales of Company common stock, including as part of a broker-assisted cashless exercise of an option, or any other market sale (e.g., a “sell to cover” sale) for the purpose of generating the cash needed to pay the exercise price of an option or satisfy tax withholding requirements. The trading prohibitions and restrictions of this Policy do not apply to any automatic tax withholding (i.e., pursuant to which the withholding method has been determined in advance of the tax withholding event).
Exhibit 19.1
What are the procedures for obtaining approval of a proposed trade in compliance with the Policy?
No Section 16 Insider or Pre-clearance Person may trade in Company securities until the following steps are completed:
Which of my family members are covered by this Policy?
Family members of a Covered Person that are subject to this Policy include the members of such Covered Person’s immediate family residing with such Covered Person, any other person in such Covered Person’s household and any other family members whose transactions in Company securities are directed by such Covered Person or subject to such Covered Person’s influence or control.
Is a gift of Company stock covered by the Policy?
Yes. A Covered Person may not make a gift, charitable contribution or other transfer without consideration, of Company securities during a period when that Covered Person is not permitted to trade. In addition, Section 16 Insiders must notify the Compliance Officer of any such gifts or transfers.
Is a distribution of Company stock to the limited partners of a partnership covered by the Policy?
Yes. An entity over which a Covered Person has or shares voting or investment control may not distribute Company securities to its limited partners, general partners or stockholders during a period when the Covered Person is not permitted to trade, unless the limited partners, general partners or stockholders of that entity have agreed in writing to hold the securities until the next time such Covered Person can trade under this Policy.
Exhibit 19.1
Is a purchase of Company stock considered a “trade” under the Policy? Or only sales of Company stock?
Both purchases and sales of Company stock are considered “trades” under the Policy.
Are transactions in derivative securities covered by the Policy?
Yes. No Covered Person may acquire, sell, trade or participate in any interest or position relating to the future price of Company securities, such as a put option, a call option, or a short sale (including a short sale “against the box,” as further described below).
What is a short sale, and what is a short sale “against the box?”
A short sale is a sale of securities that you do not own (i.e., borrowed securities). A short sale “against the box” is a sale of securities you own, but with delayed delivery.
Are standing and limit orders covered by the Policy?
Unless part of a 10b5-1 Plan, standing or limit orders should be used only for a very brief period of time, if at all. A standing order placed with a broker to sell or purchase Company stock at a specified minimum or maximum price leaves you with no control over the timing of the transaction. The limit order could be executed by the broker when you are aware of material nonpublic information, which would result in unlawful insider trading. Irrespective, for Section 16 Insiders and Pre-clearance Persons, they cannot extend beyond the pre-clearance period approved by the Compliance Officer.
Can I hold Company securities in a margin account?
No. Securities held in a margin account or pledged as collateral for a loan may be sold without your consent, either by the broker if you fail to meet a margin call or by the lender in foreclosure if you default on the loan. Because a margin or foreclosure sale may occur at a time when you are aware of material nonpublic information or otherwise are not permitted to trade in Company securities, you are prohibited from holding Company securities in a margin account or pledging Company securities as collateral for a loan.
Under what circumstances can I pledge Company securities as collateral for a loan?
An exception to the prohibition on using Company securities as collateral for a loan (not including margin debt) may be granted by the Compliance Officer where you have clearly demonstrated the financial capacity to repay the loan without resort to the pledged securities. If you wish to pledge Company securities as collateral for a loan, you must submit a request for approval to the Compliance Officer at least two weeks prior to the proposed execution of documents evidencing the proposed pledge.
Exhibit 19.1
I have a hardship or other urgent need to sell Company shares, or exercise a stock option so I can sell some Company shares. Is that okay?
No. It does not matter that there may exist a justifiable reason for a purchase or sale apart from the nonpublic information; if a Covered Person has material nonpublic information, the prohibition still applies.
I know that disclosures of material nonpublic information are prohibited under the Policy; is it okay if I monitor or participate in a chat room?
No. A Covered Person may not participate, in any manner other than passive observation, in any investment or stock-related Internet “chat” rooms, blogs, social media sites, message boards or other similar online forums relating to the Company without the prior approval of the Compliance Officer and in compliance with the Company’s Corporate Communications and Social Media Policies and any other applicable policy.
What are the procedures for trading under a 10b5-1 Plan?
Any person seeking to trade under a 10b5-1 Plan must put in place such a plan that complies with the requirements of Rule 10b5-1. The establishment and implementation of any 10b5-1 Plan will be the sole responsibility of the person seeking to establish such a plan. Compliance Officer approval of a 10b5-1 Plan will not be considered a determination by the Company or the Compliance Officer that the 10b5-1 Plan satisfies the requirements of Rule 10b5-1. The Company reserves the right to prevent any transactions in Company securities, even those pursuant to a 10b5-1 Plan, in the sole discretion of the Compliance Officer.
No trades will be treated as having been made pursuant to a 10b5-1 Plan under this Policy unless it complies with all requirements set forth in Section IV Statement of Company Policy—Permitted Trades under 10b5-1 Plans, above.
What are my obligations once I am no longer providing services to the Company?
If you are aware of material nonpublic information when your employment or service relationship terminates, you may not trade in Company securities until that information has become public or is no longer material.
How does the Policy apply to trades by the Compliance Officer?
The Compliance Officer may not trade in Company securities unless the trade has been approved by the Company’s Chief Executive Officer in accordance with this Policy.
What additional duties does the Compliance Officer have?
In addition to the duties of the Compliance Officer specified in the Policy, the Compliance Officer or its designee, will:
Exhibit 19.1
Exhibit 19.1
APPENDIX B
Section 16 Insiders
ROLE / FUNCTION |
Chief Executive Officer |
Chief Financial Officer |
Chief Technical Operations Officer |
Chief Scientific Officer |
Chief Medical Officer |
Chief Business Development Officer |
Chief People & Communications Officer |
President & Chief Operating Officer |
All Members of the Board of Directors |
Pre-clearance Persons
ROLE / FUNCTION |
General Counsel |
All Senior Vice Presidents, Vice Presidents, and Executive Directors |
Senior Strategic Advisor |
Science Advisory Board Member |
All Investor Relations and Commercial Employees, Contractors and Consultants |
All Clinical Sciences Employees, Contractors, and Consultants |
All Accounting & Finance Employees, Contractors and Consultants |
All Legal Employees, Contractors and Consultants |
All Business Development Employees, Contractors and Consultants |
All Alliance Management / Global Program Management Employees, Contractors and Consultants |
All Information Technology Employees, Contractors and Consultants |
All Executive Assistant(s) / Assistant (s) to Senior Management Team |
Exhibit 19.1
APPENDIX C
Exceptions to the Multiple, Overlapping 10b5-1 Plan Restriction
Such exceptions are:
Exceptions to the Single-Trade 10b5-1 Plan Restriction
There is an exception for eligible “sell-to-cover” 10b5-1 Plans where the plan authorizes an agent to sell only such securities as are necessary to satisfy tax withholding obligations arising exclusively from the vesting of a compensatory award, such as restricted stock or stock appreciation rights, and the Insider does not otherwise exercise control over the timing of such sales.