Stock Buyback vs Tender Offer: Key Differences Explained

A stock buyback is the goal, and a tender offer is one route to it. The table compares an open market buyback with an issuer tender offer. It covers definition, who uses each, legal and tax treatment, risk, liquidity and a typical example.

In one line: an open market buyback is quiet and gradual, and a tender offer is public, priced and time-limited.

The Open Market Buyback

The board approves a dollar amount. A broker then buys shares on the exchange over time. To avoid claims that it pushed up its own price, the company usually follows the safe harbor in Rule 10b-18:

• One brokerAll purchases on a given day go through one broker or dealer.
• TimingNo purchase as the opening trade, and none in the last 10 minutes before the close. For less active stocks, the last 30 minutes are off limits.
• PriceNo more than the highest independent bid or the last independent trade.
• VolumeNo more than 25% of the stock’s average daily trading volume, with one block purchase allowed each week.

The safe harbor is optional. Missing a condition does not by itself mean the company manipulated the price. Purchases made in a tender offer fall outside the rule.

The Tender Offer

The company announces a price, a number of shares and a deadline. A reporting company files a Schedule TO with the SEC under Rule 13e-4. The offer stays open at least 20 business days. You can withdraw your shares while it is open. Every holder of the class can take part, and all receive the same highest price paid.

Take an illustrative company with 100M shares trading at $20. It offers $22 for 10M shares, a $220M purchase. Holders tender 25M shares. The company buys 40% of each holder’s shares, pro rata. If you tendered 1,000 shares, it buys 400 for $8,800 and returns 600.

Yes. When the company itself makes the offer, the tender offer is a buyback. Rules call it an issuer tender offer. A tender offer can also come from someone else, such as a buyer seeking control. That is a third-party offer, and it is not a buyback.

Private companies use tender offers often, because their shares have no exchange. The company, or investors it brings in, buy shares from employees and early holders at one price. Stripe ran one in February 2026 that valued it at $159B. The SEC’s tender offer rules in Regulation 14E reach private companies too. For the employee side, see employee tender offers, and for timing and filings, see tender offer rules.

Some funds also buy back their own shares by tender offer, because they do not trade on an exchange. See tender offer funds.

A repurchase agreement, or repo, has nothing to do with buying back a company’s stock. It is a short-term loan backed by securities. One side buys securities from another and agrees to sell them back on a set date. The difference between the two prices is the interest.

The Federal Reserve uses repos with dealers to add cash to the banking system (Federal Reserve). Banks, dealers and money funds use them every day. The word “repurchase” is the only link. A share repurchase reduces the shares a company has outstanding. A repo leaves ownership with the original holder once the loan is repaid.

On the company side, both routes are taxed alike. A US company whose stock trades on an established market pays a 1% excise tax on the value of shares it repurchases (26 U.S.C. 4501). New shares issued in the same year, including to employees, reduce the base. Companies that buy back $1M or less in a year owe nothing. In the example above, the tax would be up to $2.2M.

On your side, the routes differ. Selling on the exchange is an ordinary sale. Selling to the company in a tender offer is a redemption. It counts as a sale if your ownership falls enough. Examples include selling all your shares, or ending below 80% of your prior stake and below 50% of the votes (26 U.S.C. 302). Otherwise, the payment may be taxed as a dividend. See tender offer taxes for the employee case.

Open Market Buyback

For

Flexible: the company buys when it chooses and can stop at any time. No premium over the market price. A safe harbor sets clear limits.

Against

Slow, capped at 25% of daily volume under the safe harbor. Only works for listed shares. An announced program may never be completed.

Verdict: an open market buyback suits a listed company returning cash gradually. It gives holders no special exit, only an extra buyer in the market.

Tender Offer

For

Buys a large block quickly at a known price. Every holder gets the same offer. Works for private company shares.

Against

Usually costs a premium. Takes at least 20 business days and formal filings. Oversubscribed offers are cut back pro rata.

Verdict: a tender offer suits a company that wants to buy many shares at once, or a private company giving holders a priced exit. For you, it is a choice to sell, often for only part of your stake.

If you hold shares in a private company, a tender offer may be your main chance to sell before a listing. You decide how many shares to offer, and the company may buy only part of them. Every other sale is a secondary transaction you arrange yourself. A buyback also changes how much of the company each remaining share owns, the reverse of dilution.

Common Mistakes

• Expecting to sell everythingIf holders offer more than the company will buy, everyone is cut back pro rata.
• Treating an authorization as a purchaseA board approval sets a ceiling. The company may buy less or nothing.
• Assuming sale treatmentA tender offer payment can be taxed as a dividend if your ownership does not fall enough.
• Confusing a repo with a buybackA repurchase agreement is a short-term loan between financial firms.

Stock buyback

A company’s purchase of its own shares, on the exchange or by a tender offer.

Open market buyback

A buyback made through a broker on the exchange over time, at market prices.

Tender offer

An offer to all holders to buy a set number of shares at a stated price within a set period.

Issuer tender offer

A tender offer made by the company for its own shares.

Rule 10b-18

The SEC safe harbor that sets limits on timing, price and volume for a company’s open market purchases.

Schedule TO

The SEC filing a reporting company makes when it starts a tender offer.

Pro rata

In proportion: each seller gets the same share of what they offered.

Redemption

A company buying back shares from a holder. For tax, it can count as a sale or a dividend.

Repurchase agreement (repo)

A short-term loan in which securities are sold and bought back on a set date at a higher price.

Excise tax on buybacks

A 1% US tax on the value of stock a listed domestic company repurchases, net of stock issued.

Rules and filings were last checked on November 6, 2026. The rules are US federal law and change over time. The worked example is illustrative: its company, prices and share counts are made up for the arithmetic.