Uniswap: what it is and what to expect from the UNI token

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Uniswap is the largest decentralized exchange (DEX) protocol in crypto, created in 2018 by engineer Hayden Adams on top of Ethereum. Instead of matching buyers and sellers in an order book the way a traditional exchange does, Uniswap uses smart contracts called liquidity pools to set prices automatically — which is why it is called an automated market maker, or AMM. UNI is the protocol's governance token, launched in September 2020 through a retroactive airdrop that became one of the most memorable in crypto history. On December 25, 2025, the community that controls Uniswap approved a change called "UNIfication": turning on a protocol fee (the so-called fee switch) and using part of the revenue to burn UNI, shrinking the token's supply. The vote came bundled with a retroactive burn of 100 million UNI, about 10% of total supply. In February 2026, the community approved expanding that mechanism to more chains. This article explains what Uniswap is, how the AMM works, UNI's history, what changed with the fee switch, and which risks and scenarios are worth watching before studying the token as an investment.

What Uniswap is

Uniswap is an open-source protocol that runs on smart contracts on Ethereum and other compatible networks. It lets users swap one token for another directly, without relying on a centralized exchange to hold their funds. Anyone with a compatible wallet can connect to the protocol — through Uniswap Labs' official interface, through a wallet, or through any other app built on top of the same contracts — and swap tokens almost instantly.

It helps to separate three things that often get mixed up in the news: the Uniswap protocol is the set of smart contracts that make swaps happen, publicly and without an owner; Uniswap Labs is the company that built most of the original code and maintains the most widely used app and wallet for accessing the protocol; and UNI is the token that grants a say in the governance that decides the protocol's future. Uniswap Labs does not own the protocol and cannot change its rules on its own — changes go through a vote of UNI holders.

How the AMM works: liquidity pools instead of an order book

Traditional exchanges match buy and sell orders in an order book. Uniswap takes a different path: anyone can deposit two tokens into a contract called a liquidity pool — for example, ETH and a stablecoin — and that pair becomes a source of liquidity for anyone who wants to swap between those two assets. Whoever deposits is called a liquidity provider, or LP.

In versions 1 and 2 of the protocol, the price inside each pool is set by a simple formula, x times y equals k: the product of the quantities of the two tokens in the pool must stay constant with every swap. When someone buys a token from the pool, that token's quantity falls and the other one rises, which pushes the price up — with no need for a buyer to be waiting on the other side at that exact moment. Every swap pays a small fee, split among liquidity providers in proportion to each one's share of the pool.

That design solves a real problem for small markets: liquidity that never sleeps, doesn't depend on a professional market maker, and can be supplied by anyone. The trade-off is that price moves with trading volume itself (a phenomenon called slippage), and pools with little liquidity can see larger price swings than an exchange with heavy volume.

From v1 to v4: the protocol's evolution

Hayden Adams was a mechanical engineer at Siemens when he lost his job in 2017 and started learning to code in Solidity. He was inspired by a 2016 post from Ethereum co-founder Vitalik Buterin describing how an automated market could work directly on the blockchain, and got support from an Ethereum Foundation grant to develop the idea. Uniswap v1 went live on the Ethereum mainnet on November 2, 2018, supporting only pairs between ETH and ERC-20 tokens.

Uniswap v2, launched in May 2020, allowed direct pairs between any two ERC-20 tokens without routing through ETH, and added price oracles and other technical improvements. That version became the base for the 2020 DeFi boom, when rival protocols such as SushiSwap tried to lure away Uniswap's liquidity providers with their own token — an episode known as a "vampire attack" that, among other factors, sped up Uniswap Labs' decision to launch its own governance token.

Uniswap v3, launched on May 5, 2021, introduced concentrated liquidity: instead of spreading capital across the entire possible price range (from zero to infinity), a liquidity provider chooses a specific range to operate in, which sharply increases capital efficiency but requires more active position management. The version also introduced several fee tiers (0.05%, 0.3% and 1%, among others) for different levels of pair volatility.

In October 2023, Uniswap Labs began charging its own 0.15% fee on swaps made through the company's official interface (web app and wallet), for certain tokens — revenue that stayed with the company, not with the protocol or with UNI holders. Interacting directly with the protocol's contract, or using a different interface, remained free of that extra fee.

Uniswap v4, launched on January 31, 2025, was the broadest upgrade in the protocol's history. It introduced hooks: code modules developers can attach to a pool to customize its behavior, such as dynamic fees that adjust to volatility, on-chain limit-order execution, or "just-in-time" liquidity provisioning. The version also reorganized the contract architecture into a single "singleton" contract, cutting the gas cost of creating new pools, and launched simultaneously on more than ten networks, including Unichain, Uniswap's own layer 2.

The UNI token: airdrop, supply and governance

UNI launched on September 16, 2020, in the middle of the fight with SushiSwap over the protocol's liquidity. Uniswap Labs retroactively distributed 400 UNI to every address that had interacted with the protocol before September 1 of that year — more than 250,000 qualifying wallets — one of the most memorable airdrops in crypto history, since, depending on when the UNI was sold, that amount ended up worth thousands of dollars for users who had made just one or two small swaps on the protocol.

UNI's maximum supply was set at 1 billion tokens. According to the official launch announcement, about 60% of total supply was earmarked for the community — including the 15% (150 million UNI) retroactive airdrop and the remainder for future incentives, liquidity mining and the governance-controlled treasury — while approximately 21.27% was reserved for the team and future employees, 18.04% for investors and 0.69% for advisors, all on a four-year vesting schedule.

Holding UNI grants the right to vote on proposals in Uniswap Governance, the process through which the community decides on protocol upgrades, treasury use and, more recently, the activation and expansion of protocol fees. Before 2025, several proposals to turn on a protocol fee (the "fee switch") were discussed and rejected or postponed, partly out of concern that distributing revenue directly to UNI holders could strengthen the argument that the token is a security under US law.

"UNIfication": the fee switch and the UNI burn

That changed at the end of 2025. On December 25 of that year, Uniswap Governance approved the "UNIfication" proposal with overwhelming support: of 125 million votes cast, fewer than a thousand were against. The proposal turned on a protocol fee on v2 and v3 pools on Ethereum — which together account for up to 95% of the fees paid to liquidity providers on the mainnet — and mandated a retroactive burn of 100 million UNI, about 10% of total supply, worth roughly US$600 million at the time, representing what would have accumulated had the protocol fee existed since launch.

Rather than distributing revenue directly to UNI holders — which could resemble a dividend payment and draw more regulatory attention — the approved design routes between one-sixth and one-quarter of swap fees into a contract called the "token jar." UNI holders can then burn their own tokens in another contract, nicknamed the "fire pit," to redeem a proportional share of the crypto accumulated in that jar — a "burn to claim" model, not automatic passive income distribution.

The same vote approved the gradual wind-down of the Uniswap Foundation, the nonprofit that managed part of the protocol's governance and incentives, with staff moving over to Uniswap Labs, and it determined that Labs would stop charging its own 0.15% fee on swaps made through the official interface.

In February 2026, the community approved a new expansion round: extending the protocol fee to eight additional networks beyond Ethereum and making fee collection automatic by default on new v3 pools — today it depends on pool-by-pool activation. Estimates published at the time pointed to roughly US$27 million in additional annual revenue, on top of a pace of about US$34 million a year already generated by the fee switch's first phase. In the first quarter of 2026, the protocol had already recorded about US$3.12 million in gross profit passed on to UNI holders, a number that was essentially zero before UNIfication.

Unichain: Uniswap's own layer 2

Launched alongside v4 in January 2025, Unichain is a layer-2 network built by Uniswap Labs on the OP Stack, the same technical base used by other networks such as Optimism. The idea is to offer fast blocks — initially one second, cut to 200 milliseconds with the "Flashblocks" upgrade in mid-2026 — and keep within the Uniswap ecosystem part of the trading volume that today is scattered across dozens of competing layer-2 networks.

To attract liquidity early on, the Uniswap Foundation funded, starting in April 2025, an incentive program worth more than US$21 million, distributing about 3.5 million UNI in rewards managed by Gauntlet. The program worked: cumulative volume in the first two months totaled US$11.1 billion, 135% of the target, and the network's total value locked (TVL) peaked at US$657 million.

The real test, though, came after the incentives ended: Unichain's TVL fell about 86% from its peak. The drop wasn't unique to Unichain — other layer-2 networks that relied on temporary incentives, such as Linea and Berachain, also lost most of the capital they had attracted — but it is a reminder of the difference between subsidized liquidity and organic demand for a network.

The regulatory chapter: the Wells Notice and the end of the SEC investigation

In April 2024, Uniswap Labs received a Wells Notice from the US Securities and Exchange Commission (SEC), signaling the agency's intent to bring a case over an alleged unregistered exchange, broker and clearing operation, plus an alleged unregistered securities offering. The company pushed back publicly, arguing that the protocol is non-custodial software and that the SEC's reading stretched beyond existing law.

In February 2025, under new leadership following Gary Gensler's departure as SEC chair, the agency closed its investigation into Uniswap Labs without bringing any enforcement action — an outcome covered by trade press as a symbolic win for the DeFi sector, in contrast with how other platforms had been treated in prior years. The closure applies to US jurisdiction; other countries keep their own rules on DeFi protocols and governance tokens, and that picture could change again over time.

Numbers for context (Sep 19, 2026)

Price, market cap and ranking change constantly; treat the figures above as a snapshot from the access date, not a permanent reference.

Advantages and limitations

Observed advantages: the largest DEX in the market by trading volume, contracts with a long operating history and multiple audits, an open model any developer can build on, a revenue mechanism that now routes part of its fees into burning UNI, and a presence across multiple networks, including its own layer 2.

Limitations and points of attention: the UNI burn depends on the protocol's trading volume, which swings with the market; new UNI issuance for incentives and the treasury (roughly 20 million tokens a year) can offset part of the burn's effect; v4's hooks add flexibility but can also fragment liquidity across many custom pools instead of concentrating it; and Unichain still has to prove it can retain volume without relying on temporary incentives.

What to expect from the token going forward

A few paths are already underway and help shape scenarios for the coming years, though none of them guarantee UNI will appreciate:

• More chains with an active fee switch: the expansion approved in February 2026 to eight additional networks, combined with automatic fee collection on new v3 pools, tends to increase the volume of UNI burned if protocol usage keeps growing on those chains.
• Adoption of v4 hooks: if developers build pools with dynamic fees, MEV protection or on-chain orders that attract more volume, that could deepen the protocol's liquidity. The opposite risk is fragmentation, with liquidity scattered across many small, custom pools.
• Unichain's future: the network could establish itself as the settlement hub of the Uniswap ecosystem if it manages to sustain organic volume, or keep losing TVL to competing layer 2s once incentive programs end — which already happened once, in 2026.
• Institutional restructuring: with the Uniswap Foundation's gradual wind-down and the end of Uniswap Labs' own fee on its interface, the ecosystem's revenue is likely to concentrate increasingly in the protocol and in UNI holders rather than in the company — a realignment of incentives worth tracking in governance reports.
• Regulatory environment outside the United States: the closure of the SEC investigation applies to the US market; other jurisdictions keep their own rules on DeFi protocols and governance tokens, and local regulatory changes remain a risk to watch.

Treat price predictions for UNI — including the most optimistic ones published by exchanges and specialized sites — as speculation, not a reliable forecast. The February 2026 episode, when UNI hit an all-time low even as the token burn was already underway, shows that good tokenomics news does not automatically override an unfavorable market environment for smaller cryptocurrencies.

Risks and precautions

Consider: market risk and high historical volatility, including drawdowns above 90% from the 2021 high; dilution risk, since new UNI issuance for incentives can offset part of the burn; execution risk, meaning the fee switch expansion or v4 hook adoption may not generate the expected revenue growth; liquidity concentration risk in a few networks or pools, which can widen slippage during stress periods; smart contract risk, present in any DeFi protocol, including custom third-party hooks built on top of v4; and residual regulatory risk outside the United States, since the closure of the SEC case does not bind other countries.

Checklist before studying Uniswap and UNI as an investment

• Understand the difference between the Uniswap protocol, the Uniswap Labs company and the UNI token before interpreting any news on the topic.
• Check the issuance schedule for new UNI earmarked for incentives and the treasury, and compare it with the current burn rate.
• Track real usage data — trading volume, fees generated, protocol and Unichain TVL — not just the token's price.
• If you plan to use the protocol directly, understand the risks of approving smart contracts and review the permissions granted to third-party pools and hooks.
• Read the original governance proposals on Uniswap's forum before accepting third-party summaries of what UNIfication actually changed.

Frequently asked questions

Are UNI and Uniswap the same thing?

No. Uniswap is the decentralized exchange protocol; UNI is the token that grants voting rights over that protocol's future. You can use Uniswap to swap tokens without ever having held UNI.

Does the fee switch guarantee UNI's price will rise?

No. The mechanism reduces UNI's supply over time if there is enough trading volume, but price also depends on new token issuance, market demand and the broader macroeconomic environment for crypto assets. In February 2026, UNI hit an all-time low even with the burn already active.

Does Uniswap Labs own the Uniswap protocol?

Not entirely. Uniswap Labs developed most of the original code and maintains the most widely used interface, but the protocol itself is controlled by UNI holder governance, and any rule change goes through a vote.

Is it safe to use Uniswap?

The protocol's core contracts have a long operating history and multiple audits, but "safe" doesn't mean risk-free: users can lose funds to scams, phishing, poorly granted contract approvals, or by interacting with poorly designed third-party pools and hooks. A specific contract's security isn't guaranteed just because it runs on top of Uniswap.

Does Unichain replace Ethereum for using Uniswap?

No. Unichain is an additional layer 2, not a replacement. The Uniswap protocol remains available on Ethereum and dozens of other networks; Unichain is just one more option, created by Uniswap Labs to try to concentrate volume within its own ecosystem.

Informational and educational content. This is not investment advice, an offer, or a solicitation to buy or sell assets.

Sources: Uniswap Docs — protocol introduction; Uniswap Blog — Introducing UNI; Uniswap Blog — Uniswap v4 is Here; Wikipedia — Uniswap; Uniswap Blog — A Win for DeFi; CoinDesk — SEC closes investigation into Uniswap; DL News — Uniswap DAO activates fee switch, burns 100M UNI; CoinDesk — vote expands Uniswap's fee switch; Bitget News — UNI hits cycle low despite active burn; Bitget News — Unichain TVL drops 86% after incentives end; CoinGecko — Uniswap (UNI) price and market data. Accessed Sep 19, 2026.