How to Read a Stock Purchase Agreement Before You Wire Funds

Before you wire funds into a startup, confirm five things: who is selling the stock, what security you are buying, where the money is going, what documents define your rights, and what has to happen before closing. A stock purchase agreement, or SPA, matters a lot, but it is often not the whole deal. In many private financings, the SPA handles the sale mechanics while the charter and side agreements control the economics, governance, and transfer rules that matter most.

This article is mainly about direct stock purchases in private company rounds. If you are signing a SAFE, convertible note, SPV subscription agreement, or participating in a Regulation Crowdfunding offering, the document stack is different. The review mindset is similar, but the agreement in front of you may not be a classic SPA.

What a stock purchase agreement actually does

An SPA is the contract for the stock sale itself. In a startup financing, it usually covers:

• who the buyer and seller are
• what class or series of stock is being sold
• how many shares are being sold and at what price
• when the closing happens and when funds are due
• representations and warranties from the company and the investor
• conditions that must be satisfied before the sale closes
• transfer restrictions, legends, and other mechanics

The SPA tells you how the sale closes. It often does not tell you the full economic deal.

First, figure out what you are actually buying

Question	Main distinction	Why it matters
Who is selling?	Primary sale vs. secondary sale	In a primary sale, the company gets your money. In a secondary sale, an existing stockholder gets your money, and transfer approvals or waivers often matter.
What security are you buying?	Common stock vs. preferred stock	Preferred stock rights often live in the charter, not the SPA.
Are you buying directly?	Direct shares vs. an interest in a vehicle	If you invest through an SPV or similar vehicle, your rights may be exercised through the manager rather than held directly by you.

Primary sale vs. secondary sale

Start with the seller. In a primary sale, the company issues new shares and receives the money. In a secondary sale, an existing stockholder sells shares and receives the money.

If you thought your check was funding the company but the SPA is really a secondary sale, stop and ask why. Secondary sales often require extra attention to transfer restrictions, rights of first refusal, co-sale rights, board approval, and whether the company will recognize the transfer in its cap table and stock records.

Common stock vs. preferred stock

Common stock and preferred stock are not interchangeable. Common stock may be simpler, but it can still be subject to transfer restrictions and stockholder agreements. If you are buying preferred stock, the headline economic and control rights often do not live in the SPA at all.

For Delaware corporations, preferred stock rights are usually set out in the certificate of incorporation. That is where you would typically find liquidation preference, conversion rights, anti-dilution terms, dividend provisions, and class or series voting rights.

Direct shares vs. an interest in a vehicle

If you are investing through an SPV or other investment vehicle, you may not be buying shares of the startup directly. You may be buying an interest in the vehicle, while the vehicle is the stockholder of record.

That changes the analysis. Your rights may be mediated through the SPV manager rather than held directly by you.

If you are buying through an SPV, do not read the papers as if you are buying startup shares directly.

Which documents matter besides the SPA?

In a priced venture round, the SPA is often only one document in a package. If you only read the SPA, you may miss the terms that matter most.

Document	What it usually controls
Stock Purchase Agreement	Sale terms, purchase price, closing mechanics, reps and warranties, closing conditions
Charter or certificate of incorporation	Preferred stock rights, liquidation preference, conversion, anti-dilution, class voting
Investor rights agreement	Information rights, pro rata rights, registration rights, and sometimes other investor protections
Voting agreement	Board composition, voting commitments, and often drag-along mechanics
Right of first refusal and co-sale agreement or similar transfer document	Transfer restrictions and participation rights on future sales
Disclosure schedules	Exceptions to the company’s reps and warranties

A simple common stock sale may involve fewer documents. A priced preferred round often involves more. The main point is the same either way: do not assume the SPA contains the full deal.

How to review the documents before you wire funds

1. Confirm the seller, the security, and where your money is going

The SPA should clearly identify the buyer, the seller, the class or series of stock, the number of shares, and the total purchase price. If the seller is not the company, make sure that matches your understanding of the transaction.

In a secondary sale, ask whether the required approvals, notices, waivers, or exercise periods under the company’s governing documents and stockholder agreements have been handled. If not, the transfer may be delayed, blocked, or disputed.

2. Do the math yourself

Multiply the number of shares by the price per share. That should equal the purchase amount. If it does not, stop and figure out why.

Then check any ownership percentage claims against the cap table used for that calculation. Your percentage ownership is not determined by the SPA alone. It depends on the company’s capitalization at closing, which may change if SAFEs, convertible notes, warrants, or an option pool increase are part of the round.

If someone told you, “This check gets you 1%,” ask what cap table and what definition of fully diluted they used. The share count in the documents controls.

The term “fully diluted” often includes more than just currently outstanding shares, but the exact definition can vary by document and deal structure.

3. Read the charter and the side agreements, not just the SPA

If you are buying preferred stock, read the charter or certificate of incorporation. If you expect pro rata rights, information rights, registration rights, board observer rights, or other investor protections, find the agreement that actually grants them.

A right that was discussed but never documented is usually not a right you should count on.

4. Read the disclosure schedules

Boilerplate is where people relax. Schedules are where the real story usually lives.

The company’s reps and warranties may look clean in the SPA, but they are often qualified by disclosure schedules listing exceptions. Those schedules may reveal unresolved IP assignment issues, demand letters, outstanding notes, cap table problems, or other facts that change how you view the deal.

An exception does not automatically kill the transaction. It does mean you should understand it before you fund the deal, not after.

5. Check the closing mechanics

Read when the closing happens, when funds are due, and what conditions must be satisfied first. Ask whether you are wiring at signing, at closing, or only after all closing conditions are met.

Also ask whether there are multiple closings, whether a minimum amount must be sold before closing can occur, and what happens to the funds if the closing never happens. Do not assume your money is protected just because the parties are “almost done.”

6. Make sure the company is authorized to issue the shares

The documents should line up on corporate authority. Depending on the deal, that may include board approval, stockholder approval, charter amendments, and enough authorized shares to cover the issuance.

If a new series of preferred stock is being created, the charter work matters. Stale cap tables, unsigned consents, draft amendments, or inconsistent share counts are classic closing problems.

7. Understand transfer restrictions and resale limits

Private startup stock is usually illiquid. The SPA, charter, and stockholder agreements may restrict transfers. Securities laws also limit resale unless there is registration or an available exemption.

Startup stock does not become liquid just because the paperwork looks simple.

This matters even more in a secondary sale. A transfer that ignores contractual restrictions can create problems after money has already moved.

8. Make sure the securities-law story matches the facts

Many private startup rounds rely on an exemption from SEC registration, often under Regulation D. The SPA or an investor questionnaire may ask you to make securities-law representations, including whether you are an accredited investor. Do not sign those reps casually.

• Under Rule 506(b), issuers generally cannot use general solicitation.
• Under Rule 506(c), issuers may use general solicitation, but all purchasers must be accredited investors and the issuer must take reasonable steps to verify that status.

The availability of the exemption depends on the actual facts of the offering, not just on what the form says. A private Reg D stock sale is also different from a Regulation Crowdfunding offering, even if both are described informally as a “community round.”

9. Verify wire instructions outside email

Wire fraud is common in closings. Verify wire instructions by phone or another trusted channel using contact information you already know is real. Do not rely on a last-minute email alone.

Good documents do not protect you from bad wire instructions.

When to pause before sending money

• You thought you were funding the company, but the seller is an existing stockholder.
• The documents give you a fixed number of shares, but the pitch emphasized a fixed ownership percentage.
• The charter, schedules, or side agreements are missing or still in draft.
• Required approvals, waivers, or amendments are described as something that will be handled later.
• The securities-law story or accredited investor reps do not match how the offering was actually marketed.
• Wire instructions arrive late, change suddenly, or cannot be verified through a trusted channel.

If the amount is material, the terms are unusual, or the document set does not hang together, get counsel involved before funds move.

Three common ways buyers get burned

“This check gets me 1%”

An investor is told that a certain check size buys roughly 1% of the company. The SPA, however, gives the investor a fixed number of shares at a fixed price. Before closing, the company increases the option pool or converts outstanding SAFEs. The investor still gets the agreed shares, but ends up below the expected percentage.

The fix is simple: ask for the capitalization assumptions behind any ownership statement, and make sure everyone is using the same definition of fully diluted capitalization.

“Preferred means standard rights”

An investor sees preferred stock in the SPA and assumes the terms are market-standard. Later, the investor learns that the charter or side agreements do not provide the rights they expected, or that a discussed right was never documented at all.

Preferred stock is not a synonym for standard terms. Read the charter and the companion agreements.

“A secondary sale is just a side deal”

A buyer signs an agreement to buy shares from an existing stockholder and wires funds. Then someone notices that the company or other stockholders had a right of first refusal, co-sale right, or approval right that was never addressed.

The fix is to treat the company’s governing documents as part of the deal, even when the company is not the seller.

FAQ

Do I need to read the charter if I already read the SPA?

If you are buying preferred stock, usually yes. The charter or certificate of incorporation often contains the key economic and voting rights.

Does the SPA tell me my exact post-closing ownership percentage?

Usually no. The SPA tells you how many shares you are buying and at what price. Your actual percentage depends on the company’s capitalization at closing and on how “fully diluted” is defined.

What is different about a secondary sale?

The seller is an existing stockholder, not the company. Your money goes to that seller, and transfer restrictions, waiver requirements, approval rights, and stock record updates often matter more than people expect.

If I invest through an SPV, do I own startup shares directly?

Usually not. The SPV often owns the shares, and you own an interest in the SPV. Your rights may be exercised through the SPV manager rather than directly by you.

Can I resell private startup stock whenever I want?

Usually no. Contractual transfer restrictions and securities-law limits often make private company stock hard to resell.

Should I sign accredited investor reps if I think I probably qualify?

No. Sign securities-law reps only if they are true. Those representations matter, and the legal analysis depends on the actual facts of the offering.

Bottom line

Read the SPA as if it matters, because it does. But do not stop there. Before you send money, make sure the SPA, the charter, the schedules, the side agreements, the cap table, and the closing instructions all tell the same story.

The clean version is simple: know who is selling, know what you are buying, know what rights come with it, and know exactly what has to happen before your wire leaves the account.