Exhibit 14.1



NMT MEDICAL, INC.



CODE OF BUSINESS CONDUCT AND ETHICS



This Code of Business Conduct and Ethics (the Code) sets forth legal and ethical standards of conduct for directors, officers and employees of
NMT Medical, Inc. (the Company). This Code is intended to deter wrongdoing and to promote the conduct of all Company business in accordance with high standards of integrity and in compliance with all applicable laws and regulations. This
Code applies to the Company and all of its subsidiaries and other business entities controlled by it worldwide.



If you have any questions regarding this Code or its application to you in any situation, you should contact your supervisor, the Chief Executive Officer
or the Chief Financial Officer.



Compliance with Laws, Rules and Regulations



The Company requires that all employees, officers and
directors comply with all laws, rules and regulations applicable to the Company wherever it does business. You are expected to use good judgment and common sense in seeking to comply with all applicable laws, rules and regulations and to ask for
advice when you are uncertain about them.



If you become aware
of the violation of any law, rule or regulation by the Company, whether by its officers, employees, directors, or any third party doing business on behalf of the Company, it is your responsibility to promptly report the matter to your supervisor or
to the Chief Financial Officer. While it is the Companys desire to address matters internally, nothing in this Code should discourage you from reporting any illegal activity, including any violation of the securities laws, antitrust laws,
environmental laws or any other federal, state or foreign law, rule or regulation, to the appropriate regulatory authority. Employees, officers and directors shall not discharge, demote, suspend, threaten, harass or in any other manner discriminate
or retaliate against an employee because he or she reports any such violation, unless it is determined that the report was made with knowledge that it was false. This Code should not be construed to prohibit you from testifying, participating or
otherwise assisting in any state or federal administrative, judicial or legislative proceeding or investigation.



Conflicts of Interest



Employees, officers and directors must act in the best interests of the Company. You must refrain from engaging in any activity or having a personal
interest that presents a conflict of interest. A conflict of interest occurs when your personal interest interferes, or appears to interfere, with the interests of the Company. A conflict of interest can arise whenever you, as an
officer, director or employee, take action or have an interest that prevents you from performing your Company duties and responsibilities honestly, objectively and effectively.



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Employees and Officers. Employees and officers must not, without the prior approval of the
Companys CFO, and executive officers must not, without the prior approval of the Board of Directors:



| |  | perform services as a consultant, employee, officer, director, advisor or in any other capacity, or permit any close relative to perform services as an officer or director, for a
customer, supplier or competitor of the Company, other than at the request of the Company;
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| |  | have, or permit any close relative to have, a financial interest in a supplier or customer of the Company, other than an investment representing less than one percent (1%) of the
outstanding shares of a publicly-held company or less than five percent (5%) of the outstanding shares of a privately-held company;
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| |  | have, or permit any close relative to have, a financial interest in a competitor of the Company, other than an investment representing less than one percent (1%) of the outstanding
shares of a publicly-held company;
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| |  | supervise, review or influence the job evaluation or compensation of a member of his or her immediate family; or
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| |  | engage in any other activity or have any other interest that the Board of Directors of the Company determines to constitute a conflict of interest.
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Directors. Directors must not:



| |  | perform services as a consultant, employee, officer, director, advisor or in any other capacity, or permit any close relative to perform services as an officer or director, for a
competitor of the Company;
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| |  | have, or permit any close relative to have, a financial interest in a competitor of the Company, other than an investment representing less than one percent (1%) of the outstanding
shares of a publicly-held company;
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| |  | use his or her position with the Company to influence any decision of the Company relating to a contract or transaction with a supplier or customer of the Company if the director or
a close relative of the director:
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| |  | performs services as a consultant, employee, officer, director, advisor or in any other capacity for such supplier or customer; or
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| |  | has a financial interest in such supplier or customer, other than an investment representing less than one percent (1%) of the outstanding shares of a publicly-held company.
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| |  | supervise, review or influence the job evaluation or compensation of a member of his or her immediate family; or
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| |  | engage in any other activity or have any other interest that the Board of Directors of the Company determines to constitute a conflict of interest.
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A close relative means a spouse, dependent child or any other person living in the same home
with the employee, officer or director. Immediate family means a close relative and a parent, sibling, child, mother- or father-in-law, son- or daughter-in-law or brother- or sister-in-law. A significant customer is a
customer that has made during the Companys last full fiscal year, or proposes to make during the Companys current fiscal year, payments to the Company for property or services in excess of one percent (1%) of (i) the Companys
consolidated gross revenues for its last full fiscal year or (ii) the customers consolidated gross revenues for its last full fiscal year. A significant supplier is a supplier to which the Company has made during the Companys
last full fiscal year, or proposes to make during the Companys current fiscal year, payments for property or services in excess of one percent (1%) of (i) the Companys consolidated gross revenues for its last full fiscal year or (ii) the
customers consolidated gross revenues for its last full fiscal year.



It is your responsibility to disclose any transaction or relationship that reasonably could be expected to give rise to a conflict of interest to the Chief Financial Officer or, if you are an executive officer or
director, to the Board of Directors, who shall be responsible for determining whether such transaction or relationship constitutes a conflict of interest.



Insider Trading



Employees, officers and directors who have material non-public information about the Company or other companies, including our suppliers and customers, as
a result of their relationship with the Company are prohibited by law and Company policy from trading in securities of the Company or such other companies, as well as from communicating such information to others who might trade on the basis of that
information. To help ensure that you do not engage in prohibited insider trading and avoid even the appearance of an improper transaction, the Company has adopted an Amended and Restated Insider Trading Policy, a copy of which may be obtained from
the Chief Financial Officer.



If you are uncertain
about the constraints on your purchase or sale of any Company securities or the securities of any other company that you are familiar with by virtue of your relationship with the Company, you should consult with the Chief Financial Officer before
making any such purchase or sale.



Confidentiality



Employees, officers and directors must maintain the confidentiality of
confidential information entrusted to them by the Company or other companies, including our suppliers and customers, except when disclosure is authorized by a supervisor or legally mandated. Unauthorized disclosure of any confidential information is
prohibited. Additionally, employees should take appropriate precautions to ensure that confidential or sensitive business information, whether it is proprietary to the Company or another company, is not communicated within the Company except to
employees who have a need to know such information to perform their responsibilities for the Company.



Third parties may ask you for information concerning the Company. Subject to the exceptions noted in the preceding paragraph, employees, officers and
directors (other than the Companys authorized spokespersons) must not discuss internal Company matters with, or



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disseminate internal Company information to, anyone outside the Company, except as required in the performance of their
Company duties and after an appropriate confidentiality agreement is in place. This prohibition applies particularly to inquiries concerning the Company from the media, market professionals (such as securities analysts, institutional investors,
investment advisers, brokers and dealers) and security holders. All responses to inquiries on behalf of the Company must be made only by the Companys authorized spokespersons. If you receive any inquiries of this nature, you must decline to
comment and refer the inquirer to your supervisor or one of the Companys authorized spokespersons. The Companys policies with respect to public disclosure of internal matters are described more fully in the Companys Disclosure
Policy, a copy of which may be obtained from the Chief Financial Officer.



You also must abide by any lawful obligations that you have to your former employer. These obligations may include restrictions on the use and disclosure of confidential information, restrictions on the solicitation
of former colleagues to work at the Company and non-competition obligations.



Honest and Ethical Conduct and Fair Dealing



Employees, officers and directors should endeavor to deal honestly, ethically and fairly with the Companys suppliers, customers, competitors and employees. Statements regarding the Companys products and services must not be
untrue, misleading, deceptive or fraudulent. You must not take unfair advantage of anyone through manipulation, concealment, abuse of privileged information, misrepresentation of material facts or any other unfair-dealing practice.



Protection and Proper Use of Corporate Assets



Employees, officers and directors should seek to protect the Companys
assets. Theft, carelessness and waste have a direct impact on the Companys financial performance. Employees, officers and directors must use the Companys assets and services solely for legitimate business purposes of the Company and not
for any personal benefit or the personal benefit of anyone else.



Employees, officers and directors must advance the Companys legitimate interests when the opportunity to do so arises. You must not take for yourself personal opportunities that are discovered through your position with the Company or
the use of property or information of the Company.



Gifts and Gratuities



The use of Company funds or assets for gifts, gratuities
or other favors to employees or government officials is prohibited, except to the extent such gifts are in compliance with applicable law, insignificant in amount and not given in consideration or expectation of any action by the recipient.



Employees, officers and directors must not accept, or permit
any member of his or her immediate family to accept, any gifts, gratuities or other favors from any customer, supplier or other person doing or seeking to do business with the Company, other than items of insignificant value. Any gifts that are not
of insignificant value should be returned immediately and reported to



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your supervisor. If immediate return is not practical, they should be given to the Company for charitable disposition or such other disposition as the
Company, in its sole discretion, believes appropriate.



Common
sense and moderation should prevail in business entertainment engaged in on behalf of the Company. Employees, officers and directors should provide, or accept, business entertainment to or from anyone doing business with the Company only if the
entertainment is infrequent, modest and intended to serve legitimate business goals.



Bribes and kickbacks are criminal acts, strictly prohibited by law. You must not offer, give, solicit or receive any form of bribe or kickback anywhere in the world.



Accuracy of Books and Records and Public Reports



Employees, officers and directors must honestly and accurately report all
business transactions. You are responsible for the accuracy of your records and reports. Accurate information is essential to the Companys ability to meet legal and regulatory obligations.



All Company books, records and accounts shall be maintained in accordance
with all applicable regulations and standards and accurately reflect the true nature of the transactions they record. The financial statements of the Company shall conform to generally accepted accounting rules and the Companys accounting
policies. No undisclosed or unrecorded account or fund shall be established for any purpose. No false or misleading entries shall be made in the Companys books or records for any reason, and no disbursement of corporate funds or other
corporate property shall be made without adequate supporting documentation.



It is the policy of the Company to provide full, fair, accurate, timely and understandable disclosure in reports and documents filed with, or submitted to, the Securities and Exchange Commission (the SEC)
and in other public communications.



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Concerns Regarding Accounting or Auditing Matters (Whistleblower Program)



Employees with concerns regarding questionable accounting or auditing
matters or complaints regarding accounting, internal accounting controls or auditing matters may confidentially, and anonymously if they wish, submit such concerns or complaints (i) in writing to the Companys Chief Executive Officer or Chief
Financial Officer at NMT Medical, Inc., 27 Wormwood Street, Boston, Massachusetts 02210, (ii) via e-mail to either jea@nmtmedical.com or red@nmtmedical.com or (iii) by using the toll-free telephone number (800) 283-3448 (for calls made from within
the United States) and (757) 413-6002 (for calls made from outside the United States). See Reporting and Compliance Procedures. All such concerns and complaints will be forwarded promptly by the Companys Chief Executive Officer or
Chief Financial Officer, as the case may be, to the Audit Committee of the Board of Directors. In any event, a record of all complaints and concerns received will be provided to the Audit Committee each fiscal quarter. Any such concerns or
complaints may also be communicated, confidentially and, if you desire, anonymously, directly to any member of the Audit Committee of the Board of Directors.



The Audit Committee will evaluate the merits of any concerns or complaints received by it and authorize such follow-up actions, if any, as it deems
necessary or appropriate to address the substance of the concern or complaint.



The Company will not discipline, discriminate against or retaliate against any employee who reports a complaint or concern, unless it is determined that the report was made with knowledge that it was false.



Dealings with Independent Auditors



No employee, officer or director shall, directly or indirectly, make or
cause to be made a materially false or misleading statement to an accountant in connection with (or omit to state, or cause another person to omit to state, any material fact necessary in order to make statements made, in light of the circumstances
under which such statements were made, not misleading to, an accountant in connection with) any audit, review or examination of the Companys financial statements or the preparation or filing of any document or report with the SEC. No employee,
officer or director shall, directly or indirectly, take any action to coerce, manipulate, mislead or fraudulently influence any independent public or certified public accountant engaged in the performance of an audit or review of the Companys
financial statements.



Waivers of this Code of Business Conduct and Ethics



While some of the policies contained in this Code must be
strictly adhered to and no exceptions can be allowed, in other cases exceptions may be appropriate. Any employee or officer who believes that an exception to any of these policies is appropriate in his or her case should first contact his or her
immediate supervisor. If the supervisor agrees that an exception is appropriate, the written approval of the Chief Financial Officer must be obtained. The Chief Financial Officer shall be responsible for maintaining a record of all requests for
exceptions to any of these policies and the disposition of such requests.



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Any executive officer or director who seeks an exception to any of these policies should contact the
Chairman of the Audit Committee. Any waiver of this Code for executive officers or directors or any change to this Code that applies to executive officers or directors may be made only by the Board of Directors of the Company and will be disclosed
as required by law or stock market regulation.



Reporting and Compliance
Procedures



Every employee, officer and director has the
responsibility to ask questions, seek guidance, report suspected violations and express concerns regarding compliance with this Code. Any employee, officer or director who knows or believes that any other employee or representative of the Company
has engaged or is engaging in Company-related conduct that violates applicable law or this Code should report such information to his or her supervisor or to the Chief Financial Officer, as described below. You may report such conduct openly or
anonymously without fear of retaliation. The Company will not discipline, discriminate against or retaliate against any employee who reports such conduct, unless it is determined that the report was made with knowledge that it was false, or who
cooperates in any investigation or inquiry regarding such conduct. Any supervisor who receives a report of a violation of this Code must immediately inform the Chief Financial Officer.



You may report violations of this Code, on a confidential or anonymous basis, by contacting the Companys Chief
Financial Officer by fax, mail or e-mail at: NMT Medical, Inc., 27 Wormwood Street, Boston, Massachusetts 02210, facsimile (617) 737-0924, e-mail red@nmtmedical.com. In addition, the Company has established a toll-free telephone number (800)
283-3448 (for calls made from within the United States) and (757) 413-6002 (for calls made from outside the United States) where you can leave a recorded message about any violation or suspected violation of this Code. While we prefer that you
identify yourself when reporting violations so that we may follow up with you, as necessary, for additional information, you may leave messages anonymously if you wish.



If the Chief Financial Officer receives information regarding an alleged violation of this Code, he or she shall, as
appropriate, (a) evaluate such information, (b) if the alleged violation involves an executive officer or a director, inform the Chief Executive Officer and Board of Directors of the alleged violation, (c) determine whether it is necessary to
conduct an informal inquiry or a formal investigation and, if so, initiate such inquiry or investigation and (d) report the results of any such inquiry or investigation, together with a recommendation as to disposition of the matter, to the Chief
Executive Officer for action, or if the alleged violation involves an executive officer or a director, report the results of any such inquiry or investigation to the Board of Directors or a committee thereof. Employees, officers and directors are
expected to cooperate fully with any inquiry or investigation by the Company regarding an alleged violation of this Code. Failure to cooperate with any such inquiry or investigation may result in disciplinary action, up to and including discharge.



The Company shall determine whether violations of this Code
have occurred and, if so, shall determine the disciplinary measures to be taken against any employee who has violated this Code. In the event that the alleged violation involves an executive officer or a director, the Chief Executive Officer and the
Board of Directors, respectively, shall determine whether a violation of



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this Code has occurred and, if so, shall determine the disciplinary measures to be taken against such executive officer or director.



Failure to comply with the standards outlined in this Code will result in
disciplinary action including, but not limited to, reprimands, warnings, probation or suspension without pay, demotions, reductions in salary, discharge and restitution. Certain violations of this Code may require the Company to refer the matter to
the appropriate governmental or regulatory authorities for investigation or prosecution. Moreover, any supervisor who directs or approves of any conduct in violation of this Code, or who has knowledge of such conduct and does not immediately report
it, also will be subject to disciplinary action, up to and including discharge.



Dissemination and Amendment



This Code shall
be distributed to each new employee, officer and director of the Company upon commencement of his or her employment or other relationship with the Company and shall also be distributed annually to each employee, officer and director of the Company,
and each employee, officer and director shall certify that he or she has received, read and understood the Code and has complied with its terms.



The Company reserves the right to amend, alter or terminate this Code at any time for any reason. The most current version of this Code may be obtained
from the Chief Financial Officer.



This document is not
an employment contract between the Company and any of its employees, officers or directors.



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