How to look up a Polymarket wallet

Yelodata · 26 October 2026

Every Polymarket account is a public wallet, so you can look up anyone holding a market: when they started, what they've traded, how they've done and what they paid. This guide covers where to find that history, how to read each part, and where the reading stops.

Where a wallet's history lives

Polymarket runs on the Polygon blockchain, and each account trades from its own wallet address. That makes two places to look:

• The Polymarket profile. Click any holder on a market page (or open their profile from the activity feed) to see their open positions, past activity and profit. This is the easiest view.
• The blockchain itself. The same address on a Polygon block explorer shows every transfer. It's complete but much harder to read, since trades show up as raw token movements.

Yeloop reads the same public data through Polymarket's own data feeds and does the reading for you, for every big holder in a market at once.

What to check, and what it tells you

1. Wallet age

When did the wallet make its first trade? A wallet that's a few days old, or whose very first trade was in the market you're looking at, has no history to judge. That's what an insider's throwaway wallet looks like. It's also what every new user looks like, so on its own it proves nothing.

2. How many markets it has traded

A wallet with hundreds of markets behind it is an active trader. One with a single market is either brand new, a fan of one outcome, or built for one bet. The more markets, the more there is to judge the wallet by.

3. Win rate, counted properly

Win rate is the share of resolved positions that made money. Two things make it misleading if you're not careful:

• Unredeemed losers. When a bet loses, the shares become worthless and most people never bother to redeem them. If you only count positions that were sold or redeemed, losses quietly drop out and the win rate looks far better than it is. Yeloop counts resolved positions that were never redeemed too.
• The odds paid. A wallet that only buys favourites at 90¢ should win about 90% of the time. A high win rate only stands out when it beats the odds the wallet paid.

Sample size matters too. Yeloop's Smart Score ignores win rate until a wallet has 10 or more resolved positions, because a short streak is often just luck.

4. Lifetime profit

Profit across all markets is the bluntest measure of skill. Look at it with the market you care about left out: a wallet that's up big only because of this one open bet hasn't proven anything yet.

5. How concentrated it is

How much of the wallet's money sits in this one position? A trader spread across 40 markets is managing a portfolio. One with 95% in a single bet is either very sure or very reckless.

6. What it paid, and how far the price has moved

The entry price is where the story is. Buying Yes at 5¢ on something now priced at 85¢ was a great call, or a lucky one. Buying at 5¢ on something still at 6¢ is just a cheap ticket. Compare the entry with the current price to see how much of the move has already happened.

Putting it together: two real wallets

Both of these held the market "Will Kylian Mbappé win the 2026 Ballon d'Or?" on 26 October 2026, when Yes was 30¢.

• 0x9e59…553e was brand new, and this was its first market ever. It had $19.1K on Yes bought at 7¢, nearly all its money, and it bought around the same time as several other new wallets. No resolved bets, so no record. It scored 64 on the insider scan: a striking pattern, but no real signal. Read it as "someone made a big early bet", not "someone knew".
• 0x9a4a…170f held No and had won 96% of 166 resolved positions. It had the highest Smart Score in the scan, +57. That's a proven trader, and worth knowing about if you're betting against them.

The first wallet tells you very little about the outcome. The second tells you a skilled trader disagrees with the Yes side. Neither tells you who'll win.

Where a wallet lookup stops

• One person, many wallets. Anyone can open as many wallets as they like. A "new" wallet might belong to a veteran, and a group of wallets buying together might be one person.
• No names. A wallet address isn't an identity, and a pattern isn't proof that anyone did anything wrong. Don't treat a scan as an accusation.
• Hedges you can't see. A big position might be one side of a trade placed somewhere else.
• The past isn't the future. Even the best wallets lose, and copying them has its own costs: by the time you see the trade, the price may have moved.

Look up every big wallet in a market at once

Checking wallets one by one on Polymarket takes a while. Yeloop doesn't look up a single address on its own. Instead it scores every big holder in a market in a minute or two:

• The Insider scan checks each holder with $500 or more on one side for age, narrowness, concentration, win record, long-odds entries and coordinated buying. See how to spot insider trading on Polymarket.
• The Smart Score scan rates the top holders on both sides by track record. See how to track Polymarket whales.

Paste a market link into @yeloop_bot to start. The free plan includes 3 scans a month, no card needed.