Polymarket Whale Watch: Biggest Trades of the Week (May 23-30, 2026)

Every week, a handful of Polymarket wallets move six and seven figures on a single contract. Most traders never see these flows. They happen fast, they clear fast, and unless you're staring at on-chain data you miss them.

This is the recap. Seven days, the biggest trades, and what the smart money was actually doing on Polymarket.

All figures pulled from live Polymarket on-chain data via the Your Prediction Edge whale tracker. Trades below are ranked by USDC size unless otherwise noted.

1. The Biggest Bet of the Week: $1.3M on Arsenal at 44 Cents

On May 30, the day of the Champions League final, the #1 all-time Polymarket whale lovelystuff bought YES on "Will Arsenal win the 2025-26 Champions League?" at 44 cents.

Size: $1,305,000.

That's the single biggest trade of the week, and it's not isolated. The same wallet stacked four separate trades on the other side of the same game in the hours that followed: $739K, $529K, $463K on NO for "Will Paris Saint-Germain FC win on 2026-05-30?" at 61 to 63 cents. Combined, lovelystuff is sitting on roughly $3M of Arsenal-beats-PSG exposure going into kickoff.

Then the #2 wallet, shakendbake, piled in. $470K on Arsenal YES at 47 cents, another $384K at 48 cents, and a parallel $620K on PSG NO at 62 cents. That's the two biggest accounts in Polymarket history both leaning hard, in size, on the same outcome within hours of each other.

What this tells you: when the top of the leaderboard agrees in size, the market is either about to move or already priced where the smart money thinks it should be. The Arsenal contract opened the week in the 30s and crossed 47 cents by the time these orders hit. The whales aren't catching the move. They're sizing into it.

If you want context for who these wallets are: lovelystuff is up $3.77M in PnL just this week on $19M of volume. shakendbake is up $1.27M on $6.7M of volume. These are not retail accounts.

2. The Iran Trade: $7.3M Saying No Deal by Saturday

The biggest coordinated whale narrative of the week was the US-Iran permanent peace deal contract.

The May 31 version of the question pulled in 75 distinct whales, 221 trades, and $7.35M of volume, with average pricing at 80.9 cents on NO. That is the largest cross-wallet conviction trade of the week. Seventy-five separate accounts independently arrived at the same view: no peace deal by Saturday.

For comparison, the May 26 version of the same question (now resolved) also drew $3.6M in NO volume at 86 cents. The whales were right.

Pair this with the supporting trades:

• Will the Iran ceasefire continue through May 24? YES at 98.7 cents. 42 whales, $2.3M in volume. The capital-efficiency play: lock in a near-certain payout for a few days and clip a few hundred basis points annualized.
• Iran closes its airspace by May 24? NO at 97.6 cents. 27 whales, $1.3M.
• Will the Iranian regime fall by May 31? NO at 99.7 cents. $1.1M.

The pattern across all four contracts: heavy NO on anything that requires a dramatic geopolitical move on a short clock, heavy YES on continuation of the current state. The market is pricing escalation as essentially zero in the near term and the diplomatic outcome as far away.

If you wanted to know what professional Polymarket money thinks the Iran situation looks like over the next two weeks, you can read it directly off the order book. The answer: nothing happens.

3. The Capital-Efficiency Trade: $499K at 99.8 Cents

On May 30 at 1:26 UTC, TheMonaLisaCode (rank #50) bought NO on "Will the Montreal Canadiens win the Eastern Conference?" at 99.8 cents.

Size: $499,200.

This is the trade type that looks boring on the surface and isn't. The market had already priced the outcome at near-certainty (Montreal had been eliminated), so TheMonaLisaCode is paying 99.8 cents for a contract that pays out 100. Profit per share: 0.2 cents. The capital lockup is roughly $499K for a week or two.

This is the same play FedWillWin ran in April with his $3.9M Fed bet at 99.7 cents. It is the dominant strategy at the top of the Polymarket leaderboard right now. It is not directional, it is not opinionated, and it does not require any view about the underlying event. It is pure capital efficiency: park money where the residual risk is essentially zero, clip the last fraction of a cent, repeat.

The traders running this strategy are not predicting anything. They are providing liquidity at the tail of resolution. Worth understanding if you want to know what most of the big money on Polymarket is actually doing.

4. The NBA Playoff Action: Spurs and Thunder Both Got Whale Money

The Western Conference Finals Game 7, Thunder vs Spurs, drew real whale flow on both sides.

• Spurs to win: 72 whales, 171 trades, $3.7M in volume at 76.6 cents average
• Thunder to win: 47 whales, 80 trades, $1.7M at 36.2 cents average

The Spurs side was the consensus trade by a 2.1x margin in dollar volume. The Thunder side was the value trade: smaller, contrarian, sized into the closer prices. Both sides were taken by whales who knew what they were doing.

The Knicks vs Cavaliers series saw similar two-sided whale activity: $2.2M on Knicks at 73.6 cents and $1.9M on Cavaliers at 47.3 cents. When a game gets meaningful action on both sides at fair-looking prices, that's the market doing what it's supposed to do.

5. Juventus and the Pre-Resolution Sweep

On May 24 at 18:04 UTC, tubeyou (rank #21) bought YES on "Will Juventus FC win on 2026-05-24?" at 67 cents.

Size: $615,610.

What makes this one interesting is what happened next. Three hours later, just before the match resolved, VPenguin (rank #42) sold NO on the same contract at 99.9 cents for $388,693. Same market, opposite direction, three hours apart, both whales sized correctly.

This is the late-cycle whale pattern: position early at a fair price, then either ride the resolution or get swept by another whale near the tape. Tubeyou's PnL on the week is small ($47K) but the contract sizing is large enough that it suggests this wallet is running a specific repeatable strategy.

6. The Hockey Underplay: $461K on Hurricanes

Tiger200 (rank #10) bought Hurricanes in Canadiens vs Hurricanes at 71 cents for $461,502 on May 29.

Hockey rarely gets this kind of whale volume on Polymarket, and the fact that a top-10 wallet sized in heavily here is worth flagging. Tiger200's PnL this week is $191K on essentially this trade. The market closed Hurricanes-favored and the trade printed.

Honorable mention: the Persistent Iran Wallet

One wallet keeps showing up across the Iran trades all week: 0x0F0223dC4b5C68f345Ac4F0444f2955740B85bfB (rank #16). On May 28 they bought $382K of NO on the May 31 Iran peace deal at 94 cents. On May 29 they added another $477K at 93 cents. They are not a household name on the leaderboard but they are clearly running a concentrated geopolitical book and they are consistently the right side at the right price.

If you want a wallet to add to your follow list, this is one to look at.

The Read

Three patterns showed up this week, and they are the patterns that show up most weeks if you actually look at the on-chain data:

1. The top of the leaderboard agrees in size when conviction is real. lovelystuff and shakendbake both leaning into Arsenal-beats-PSG is the signal. When the two biggest historical PnL wallets agree in size on the same outcome, that is the strongest cross-wallet read available on Polymarket.
2. The capital-efficiency trade is the dominant strategy at the top. TheMonaLisaCode's $499K at 99.8 cents is not glamorous and not directional. It is what most of the big money is actually doing.
3. Geopolitical narratives draw concentrated conviction. The Iran complex drew $13M of whale volume across four related contracts this week, all leaning the same direction. When you see that kind of concentration, the market is telling you what it thinks.

If you want to track this in real time instead of weekly, the whale tracker updates every 30 minutes and shows the current leaderboard, position size, and trade history for all 200 top wallets. You can follow specific wallets and get alerts when they move.

See you next week.