Authors: Corporate Law Department, Atty. Mustafa Şahin

Introduction

In joint-stock companies, the board of directors occupies a central role as the governing and representative body of the company. Pursuant to the Turkish Commercial Code No. 6102 (“TCC”), the appointment of board members is, as a rule, among the non-delegable powers of the general assembly. However, in order to ensure the continuity of corporate operations and to eliminate the legal and practical risks arising from deficiencies in corporate organs, the legislator has introduced an exception to this general principle: the co-optation mechanism.

In its broadest sense, co-optation refers to the ability of the members of a corporate organ to appoint new members to that same organ. In the context of joint-stock companies, this mechanism is regulated under Article 363 of the TCC, allowing the board of directors to temporarily fill a vacant board seat. In this respect, co-optation constitutes a legal instrument that both ensures the continuity of the corporate organ and establishes a delicate balance between the authority of the general assembly and the functionality of the board of directors.

Legal Framework and the Nature of Co-Optation

Under Article 363 of the TCC, where a board membership becomes vacant for any reason, the board of directors may appoint a person meeting the statutory qualifications as a temporary member, subject to the approval of the first general assembly meeting. The appointed member serves until such approval is obtained; if approved, the member completes the remaining term of their predecessor.

This arrangement does not constitute a delegation of authority in the strict sense. As widely accepted in the doctrine, the board does not act on behalf of the general assembly when exercising this power, but rather acts within the scope of an independent authority conferred directly by law. Nevertheless, the requirement of general assembly approval functions as a control mechanism preventing the unrestricted use of this authority.

The defining feature of co-optation is its temporary nature. This temporariness is reflected both in the limited tenure of the appointed member and in the supervisory authority of the general assembly. Accordingly, an appointment made through co-optation does not amount to a definitive election, but rather constitutes a provisional completion of the board.

Purpose and Function of Co-Optation

The primary purpose of the co-optation mechanism is to prevent the company from being left without a functioning governing body and to ensure the uninterrupted continuation of managerial activities. A board operating with an incomplete composition may face difficulties in decision-making processes; in more severe cases, it may become unable to convene or adopt resolutions.

In this context, co-optation should not be viewed merely as a technical tool for numerical completion, but rather as a functional mechanism that secures the institutional continuity of the company. Although the doctrine has traditionally adopted a narrow interpretation, treating co-optation as a means to maintain a “full board,” contemporary approaches increasingly recognize its role in preventing the absence of corporate organs.

It is therefore essential to assess the co-optation provision within the broader systematic framework of the TCC. Under Article 530 of the TCC, the absence of a corporate organ leads to dissolution only if such absence persists for a prolonged period. This indicates that the legislator prefers resolving deficiencies in corporate organs through internal mechanisms wherever possible.

Conditions for the Application of Co-optation

For co-optation to be applied, a vacancy in the board of directors must first arise for any reason. Such vacancy may occur due to resignation, death, loss of legal capacity, or the loss of statutory qualifications required for board membership.

In addition, the individual to be appointed must satisfy all statutory requirements as well as the conditions set forth in the articles of association for serving as a board member. Otherwise, the appointment will be deemed invalid. In this respect, compliance with both mandatory provisions of law and company-specific eligibility criteria constitutes a prerequisite for a valid co-optation.

A particularly debated issue concerns the level of functionality required for the board of directors to adopt a co-optation resolution. According to the traditional view, the board must be able to meet its quorum requirements for both meetings and resolutions in order to validly exercise its co-optation authority. However, a more contemporary and functional approach—taking into account that under the Turkish Commercial Code the board of directors may consist of a single member—argues that even a sole remaining member should be deemed competent to adopt a co-optation resolution.

This latter approach appears to be more aligned with the purpose of the law. Indeed, in situations where the board becomes dysfunctional, denying the possibility of co-optation would render the mechanism ineffective and increase the risk of the company being left without a functioning corporate organ.

From a corporate registry (trade registry) perspective, co-optation also entails a distinct procedural dimension. The resolution of the board of directors regarding the co-optation is, as a rule, registered and announced before the general assembly convenes. This registration ensures transparency and allows third parties to rely on the publicly disclosed composition of the board.

However, such registration does not eliminate the requirement for subsequent general assembly approval. If the general assembly later approves the co-opted member, the relevant registration remains valid and the member’s position continues uninterrupted. Conversely, if the general assembly does not approve the appointment, the board membership terminates as of the date of the general assembly resolution, and the registry records must be updated accordingly. In such case, the general assembly decision rejecting the appointment is also subject to registration and announcement, thereby ensuring that the trade registry accurately reflects the current composition of the board.

Accordingly, the co-optation mechanism operates not only at the level of internal corporate decision-making but also within the framework of the trade registry system, where registration and public disclosure play a crucial role in ensuring legal certainty and the protection of third parties.

Comparative Law Perspective

The approach to co-optation varies significantly across different legal systems. While some jurisdictions explicitly allow co-optation, others categorically reject it.

For instance, Swiss law does not recognize co-optation in joint-stock companies, leaving the appointment of board members exclusively to the general assembly. In contrast, French and U.S. law explicitly permit co-optation and regulate it in detail. Notably, under U.S. law, even a single remaining board member may fill vacancies through co-optation. This approach clearly prioritizes the objective of preventing the absence of corporate organs.

German law, on the other hand, does not adopt co-optation but provides alternative mechanisms, such as the appointment of substitute members or court-appointed replacements. However, these alternatives do not always offer a fully satisfactory solution and may give rise to practical difficulties. This comparative perspective demonstrates that a broader interpretation of co-optation under Turkish law is both feasible and desirable. As also emphasized in the doctrine, an overly restrictive interpretation of co-optation may lead to results contrary to the purpose of the law.

Shareholders’ Agreements and Co-optation

In practice, particularly in family-owned companies, venture capital investments, and companies with multiple shareholders, detailed and binding arrangements regarding the composition of the board of directors are commonly set forth in shareholders’ agreements. One of the most frequently encountered mechanisms in this context is the granting of privileges to certain share classes or investors to nominate or directly appoint members of the board of directors. Such provisions are of critical importance for maintaining the balance of representation within the company’s management, ensuring investor participation in governance, and safeguarding their influence over strategic decision-making processes.

The co-optation mechanism, while enabling the prompt filling of vacancies on the board of directors, also constitutes a tool that may directly affect this delicate contractual balance established under the shareholders’ agreement. Accordingly, when exercising its co-optation authority, the board of directors must not only comply with the provisions of the Turkish Commercial Code but must also take into account its contractual obligations arising from the shareholders’ agreement. Any deviation from such contractual arrangements, although it may result in a formally valid board appointment, may nonetheless constitute a breach of contract and give rise to claims for damages or other contractual remedies on the part of the affected shareholders.

In this respect, particularly in structures involving investors, it is essential that the board adheres to the nomination or approval mechanisms set forth in the shareholders’ agreement when appointing members through co-optation. Otherwise, the composition of the board may be effectively altered in a manner that circumvents the investor’s contractual rights, such as veto rights, qualified majority requirements, or representation rights. Therefore, co-optation should not be viewed merely as a technical appointment mechanism, but rather as a corporate governance instrument that directly impacts the internal balance of power within the company.

Legal Effect of General Assembly Approval

The requirement that appointments made through co-optation be subject to the approval of the general assembly constitutes a fundamental safeguard limiting the discretionary use of this mechanism and preserving the ultimate will of the shareholders. The general assembly is vested with the authority to freely assess such appointments and may either approve or reject them, with or without providing any justification.

In the event that the general assembly does not grant its approval, the mandate of the board member appointed through co-optation terminates as of the date of the general assembly resolution. However, a key issue in practice and doctrine concerns the legal validity of the decisions adopted by the board of directors during the period in which such member served.

The prevailing view in both legal doctrine and established case law is that, even in the absence of subsequent general assembly approval, the decisions adopted during this period remain valid and enforceable. This approach is grounded in the principles of legal certainty and transactional security. Any contrary interpretation would not only call into question the validity of the appointment itself, but also expose all board resolutions adopted with the participation of such member to the risk of invalidity, thereby creating significant uncertainty in the company’s relations with third parties and undermining the continuity of its operations.

It should also be noted that the rejection of approval by the general assembly does not have retroactive effect on the status of the relevant individual as a board member; rather, it produces effects only prospectively. Accordingly, while the validity of the acts carried out during the term of office is preserved, any potential liability issues or claims arising from breaches of contractual arrangements within the company must be assessed separately. In this sense, general assembly approval functions both as a mechanism of corporate oversight and as a complementary tool for restoring the internal balance within the company.

Conclusion

The co-optation mechanism represents an exceptional yet highly significant institution within joint-stock company law. While the authority of the general assembly to appoint board members remains a fundamental principle, co-optation serves as an indispensable tool in ensuring the continuity of corporate operations and preventing the risks associated with the absence of corporate organs. Although this institution has historically been interpreted narrowly in Turkish law, the systematic framework introduced by the TCC—particularly the recognition of single-member boards—necessitates a more flexible and functional approach.

In this context, co-optation should be regarded not merely as a mechanism for numerical completion, but as a means of preventing the absence of corporate organs. Moreover, it should be accepted that, where necessary, even a single board member may exercise this authority. Ultimately, co-optation remains a critical legal instrument that safeguards managerial continuity and ensures the stability of corporate governance in joint-stock companies.