Put and Call Options for Proactive Divestment: 5 Critical Things Minority Shareholders Must Know

One of the biggest risks minority shareholders face when investing in a private or unlisted company is limited liquidity: there is no exchange to sell shares on when an exit is needed, and controlling shareholders or management can delay approving a transfer to a third party indefinitely. A put option is the key contractual tool that lets a minority shareholder proactively divest on pre-agreed terms, rather than depending entirely on the goodwill of the majority.

This article sets out 5 critical things investors and minority shareholders must know about put options, call options, and proactive divestment mechanics in a shareholders agreement, protecting investment value when the working relationship breaks down. This mechanism is often negotiated together with pre-emptive rights and option pool protections to provide comprehensive protection for a minority investor across funding rounds.

What A Put Option Is And Why It Matters

A put option is a contractual right that allows a minority shareholder to force the majority shareholder or the company itself to buy back its shares at a pre-agreed price or valuation formula, once a specific trigger event occurs — such as the expiry of an expected holding period, the company failing to meet committed financial targets, or a material breach of the shareholders agreement by the controlling shareholder.

Conversely, a call option gives the majority shareholder or the company the right to buy out a minority shareholder’s stake on agreed terms, commonly used when a minority shareholder who is a key employee leaves the company (leaver provisions) or when the company wants to consolidate control ahead of an IPO or a sale to a strategic investor.

Legal Basis And Enforceability In Vietnam

Vietnamese law has no standalone statutory regime specifically governing put and call options, but such arrangements are recognized under the general principle of freedom of contract in civil and shareholders agreements, provided they do not violate a prohibition of law, public morals, or the charter’s restrictions on share transfers [State Authority Practice / Verification Required].

A key practical issue is the enforceability of a put option arrangement when the party obligated to buy back the shares lacks the financial capacity or refuses to perform. In that scenario, the minority shareholder typically must sue for specific performance or damages, a process that can be lengthy and costly.

Pricing Mechanisms In A Put Option Arrangement

The pricing mechanism is the single most important element of an effective put option arrangement. Common approaches include a pre-agreed fixed price, a formula based on an EBITDA or revenue multiple, adjusted book value, or an independent valuation by a third-party valuer when the parties cannot agree on price.

• A fixed price offers certainty from the outset but may not reflect actual value at the time the right is exercised.
• A multiple-based formula is more flexible but requires clearly specifying the financial data source and the reporting period used.
• An independent third-party valuation is the fairest mechanism but takes more time and cost to complete.

Common Trigger Events For A Put Option

A shareholders agreement should clearly enumerate the events that trigger a put option, typically including: expiry of the committed investment horizon (often 3-7 years for private equity funds), failure to complete an IPO or M&A exit within the expected timeframe, a material breach of shareholders agreement commitments, a change of control that occurs without minority shareholder consent, or a force majeure event that materially disrupts the business.

Defining trigger events clearly and unambiguously is critical to avoiding disputes over whether the put option was validly triggered, particularly where the controlling shareholder has an incentive to delay or deny that the trigger occurred.

Risks In Exercising A Put Option In Vietnam

Beyond the financial capacity risk of the obligated buyer, foreign minority shareholders also face risks relating to outbound fund transfer procedures, documentation requirements proving the legality of the transaction with the State Bank, and the time required to process the enterprise registration certificate update once the share transfer is complete.

For conditional sectors or sectors subject to a foreign ownership limit, transferring shares under a put option must also comply with additional approval or notification procedures, which can extend the closing timeline well beyond what the minority shareholder initially expected.

Illustrative Scenario

An individual investor contributes 20% of the capital in a startup under a put option allowing a sale back to the founder after 5 years if the company has not achieved an IPO, priced at 1.5 times the capital contributed. By year 5, the company has not achieved an IPO, but the founder refuses to perform the buyback obligation, citing insufficient cash.

The investor is forced to sue for specific performance, and the court or arbitral tribunal must consider whether the buyback obligation belongs to the founder personally or to the company, while also assessing the enforceability of any award if the obligated party does not comply voluntarily. This scenario illustrates why clearly identifying the obligated party and a security mechanism for performance (such as a personal guarantee or escrow) matters so much.

Key Terms To Know

Put Option: the right of a shareholder to force another party to buy back its shares on agreed terms.

Call Option: the right of one party to buy out another party’s shares on agreed terms.

Trigger Event: a specific, pre-defined event that gives rise to the right to exercise a put or call option.

Negotiating Security Mechanisms For Put Option Performance

To increase the real-world enforceability of a put option, an investor should negotiate additional security mechanisms such as a personal guarantee from the founder, an escrow of part of the expected buyback value, a pledge of the founder’s personal assets or shares, or a late-payment penalty interest rate that creates financial pressure to comply on time.

The choice of dispute resolution forum (Vietnamese courts or international arbitration) and governing law also significantly affects the speed and effectiveness of enforcing a put option in a dispute, particularly for foreign investors.

Comparison With Other Exit Mechanisms

Compared with tag-along rights, a put option is more proactive because it does not depend on the majority shareholder deciding to sell — a minority shareholder can trigger the exit right on its own schedule or conditions. A tag-along right, by contrast, only arises when the majority shareholder actively sells to a third party.

A comprehensive shareholders agreement typically combines both mechanisms: a put option enables proactive divestment on a predetermined schedule, while tag-along rights protect the minority shareholder in the event of an unexpected M&A transaction the company does not proactively disclose in advance.

Timeline And Cost Of Exercising A Put Option

The process of exercising a put option typically takes 60-120 days from the shareholder’s trigger notice, covering the time needed to determine the buyback value (particularly if an independent valuation is required), negotiate payment terms, and complete the share transfer registration with the business registration authority.

According to Investopedia coverage of put options, if the obligated party refuses to perform and the dispute must be resolved through arbitration or litigation, the timeline can extend to 12-24 months or more, along with significant legal fees, valuation costs, and enforcement costs, particularly where the obligated party’s assets are located abroad.

The Role Of Put Options In M&A Deal Structuring

In M&A transactions with a staged investment or earn-out component, put options are commonly used as a protective mechanism for minority investors in case performance milestones are not achieved as committed, allowing the investor to exit rather than remain tied to an underperforming investment.

A buyer in an M&A transaction should pay particular attention to reviewing any existing put option arrangements of the target company during legal due diligence, since these latent buyback obligations can materially affect the company’s cash flow and capital structure after closing.

Building An Alternative Periodic Liquidity Mechanism

Beyond a traditional put option, some companies build a periodic liquidity window that allows minority shareholders to sell a portion of their shares annually or biennially, priced by reference to the most recent internal valuation, reducing liquidity pressure without waiting for a full put option trigger event.

This mechanism is particularly useful for companies on a long-term IPO or M&A roadmap, allowing minority shareholders to balance holding shares for long-term growth against short-term liquidity needs.

Financial Modeling Of A Put Option Exit Decision

Deciding whether and when to exercise a put option benefits from a simple financial model comparing the certain, contractually-fixed exit value against the uncertain upside of remaining invested and waiting for an eventual IPO or M&A exit. The model should incorporate the time value of money, the probability-weighted range of future exit outcomes, and the credit risk that the obligated buyer may be unable to pay in full when the right is exercised.

A rigorous model also accounts for the tax treatment of the buyback proceeds in the investor’s home jurisdiction and in Vietnam, since the structuring of the payment — lump sum versus installments, share buyback versus a separate loan repayment — can materially change the investor’s net after-tax outcome from exercising the put option.

Documentation Standards That Strengthen A Put Option Claim

A minority shareholder relying on a put option should maintain a clear paper trail: the original shareholders agreement clause, all correspondence confirming the occurrence of the trigger event, the formal exercise notice with proof of delivery, and any valuation reports obtained in connection with determining the buyback price. This documentation becomes decisive if the obligated party disputes the trigger or the price.

Counsel advising the shareholder should also preserve contemporaneous evidence of the company’s financial condition at the time the put option is exercised, since this evidence often becomes central to a damages claim if the obligated party later refuses or delays payment.

Practical Timeline For Resolving A Put Option Dispute

Where an obligated party disputes a validly triggered put option, the shareholder typically has a defined contractual window — often 30 to 90 days — to send a formal default notice and commence dispute resolution proceedings before delay itself begins eroding the practical value of the claim, particularly if the company’s financial condition continues to deteriorate during the dispute.

Once arbitration or litigation is commenced, resolving a put option dispute typically takes 12 to 24 months to a final award or judgment, followed by a separate enforcement phase that can take significantly longer if the obligated party’s assets are located outside Vietnam or in a jurisdiction without a straightforward mechanism for enforcing foreign awards.

Board Governance Practices That Reduce Put Option Disputes

A board that maintains a standing schedule of upcoming put option trigger dates and proactively budgets for potential buyback obligations significantly reduces the likelihood of a dispute, because it forces the company to plan liquidity for these obligations well before they become due, rather than discovering a funding gap only after a shareholder exercises the right.

Directors should also confirm, before approving any major new financing or dividend distribution, that the transaction will not impair the company’s ability to honor outstanding put option obligations, since prioritizing other uses of cash over a contractually binding buyback obligation can itself expose directors to liability.

Interaction Between Put Options And Drag-Along Rights

Where a shareholders agreement includes both a put option and a drag-along right, the two mechanisms can interact in ways that require careful drafting: if the majority shareholder exercises a drag-along right to force a company-wide sale before a minority shareholder’s put option has vested or become exercisable, the minority shareholder may lose the benefit of the pricing protection the put option was meant to provide.

Investors negotiating both protections should specify which mechanism takes priority if both become available at the same time, and should generally insist that a pending or accrued put option right survive and be honored even if a drag-along sale is triggered first, so that the minority shareholder is not left worse off by a transaction it did not choose to initiate.

Tax And Currency Considerations For Cross-Border Put Option Payments

A foreign minority shareholder receiving buyback proceeds under a put option should plan in advance for the tax treatment of the payment both in Vietnam and in its home jurisdiction, since capital gains characterization, applicable double tax treaty relief, and withholding obligations can significantly affect the net proceeds actually received.

Currency risk is a further consideration where the buyback price is denominated in Vietnamese dong but the investor’s functional currency is different; a well-drafted put option clause should specify the currency of payment and, where appropriate, an exchange rate mechanism to avoid disputes over currency conversion timing.

Roadmap For Exercising A Put Option

• Step 1: Review the shareholders agreement to confirm the conditions, trigger events, and pricing mechanism for the put option.
• Step 2: Gather evidence confirming that a trigger event has occurred as defined in the agreement.
• Step 3: Send a formal notice exercising the put option in the correct form and within the required deadline.
• Step 4: Work with the counterparty to determine the buyback value, using an independent valuation if necessary.
• Step 5: If the obligated party refuses to perform, consult counsel to assess litigation or arbitration options.

Frequently Asked Questions About Put Options

Must a put option be reflected in the company charter? Not necessarily, but it should be set out in the shareholders agreement and cross-referenced appropriately with the charter to avoid conflicts with transfer restrictions.

What if the company lacks the cash to perform a put option? The parties may agree to installment payments, convert the obligation into an interest-bearing loan, or find a substitute third-party buyer for the shares.

Can a call option be abused to squeeze out a minority shareholder? Yes, this risk exists where the call option clause is drafted too broadly or the buyback price is unfair; minority shareholders should negotiate for the call option to apply only in specific circumstances with a fair pricing mechanism.

What is a reasonable timeframe to exercise a put option? Typically 60-120 days from the trigger, depending on the complexity of the valuation and transfer procedures.

Can a put option right be transferred to a third party? In principle, yes, if the agreement allows it, but the related transfer of rights and obligations should be considered carefully [State Authority Practice / Verification Required].

Put Options In Portfolio-Level Risk Management

For a fund managing a portfolio of multiple private investments, a put option functions as a portfolio-level liquidity risk management tool, allowing the fund to proactively plan expected divestment cash flows rather than depending entirely on market events such as an IPO or M&A whose timing the fund cannot control.

When negotiating put options across multiple portfolio investments, a fund should try to standardize trigger events and pricing mechanisms across different target companies, simplifying monitoring and enforcement of the right when it becomes necessary.

Comparing Put Options Across Successive Funding Rounds

A put option negotiated in an early funding round (Series A) often has materially different trigger conditions from a put option negotiated in a later round (Series C or beyond), since risk appetite and expected holding periods differ across each stage of investment.

An investor participating in multiple rounds of the same company should specifically ensure that a put option negotiated in an earlier round is not undermined or diluted by new terms in a later round, through a most-favored-nation clause preserved in the shareholders agreement.

When To Engage Counsel

A minority shareholder should engage counsel from the shareholders agreement negotiation stage to ensure the put option clause is drafted tightly, with a clear pricing mechanism and an appropriate performance security mechanism, rather than waiting until a dispute arises to try to enforce the right.

Sources

Gaughan, Patrick A. Mergers, Acquisitions, and Corporate Restructurings. OECD/G20 Principles of Corporate Governance: OECD Corporate Governance Principles.