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Polymarket whale wallet ndb1 places massive bets on congressional midterms

Lines' whale tracker lists wallet ndb1 as the largest recent Polymarket trader, buying Yes on Senate control at 31 cents for 557,000 dollars and No on House control at 93 cents for 544,000 dollars. The same wallet also placed a 306,000 dollar Yes trade on the Balance of Power market at 26 cents.

Wallet ndb1 topped the recent Polymarket trader rankings in Lines’ whale tracker, with sizable trades across three midterm markets, according to Lines.

The report, published Oct 31, 2026 at 6:15 AM ET, listed a 557,000 dollar Senate control trade and a 544,000 dollar House control trade, alongside a separate Balance of Power position.

Three trades, different contract sides

In the Senate control market, ndb1 bought Yes at 31 cents for 557,000 dollars, according to Lines. The House control transaction was a No purchase at 93 cents for 544,000 dollars.

The same wallet also placed a 306,000 dollar Yes trade in the Balance of Power market at 26 cents, Lines reported.

Limits of the available detail

The supplied summary does not identify the party or precise outcome attached to each contract. The Yes and No labels therefore cannot, on their own, establish which partisan result ndb1 was backing.

Nor does the summary provide execution times, subsequent prices or the wallet’s other holdings. The transactions show substantial activity by one wallet, but do not establish its overall exposure or whether these purchases formed part of a broader strategy.

What it means for prediction markets

  • Concentrated activity: Lines attributed all three trades to ndb1. They represent activity from one wallet, not three independent signals.
  • Contract wording matters: Interpreting the Senate, House and Balance of Power positions requires the underlying market questions and resolution rules.
  • Prices are transaction-specific: The reported 31-cent, 93-cent and 26-cent entries do not establish current market prices or show how the trades affected pricing.
PolymarketSenateMidtermsInfiniti MarketsInfiniti Signals

Sources & attribution

Published
  1. Source
    Lineslines.com
    Publisher
    https://www.lines.com
    Source URL
    The feed did not publish this story's article address.

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