Dutch broker Lynx is opening an office in Warsaw, it said today (Thursday). Poland becomes the fifth country where the Amsterdam-based company runs a local team, and it says it serves more than 72,000 active investors across Europe.That is fewer than the Polish brokerage accounts XTB opens in six weeks at its August pace. XTB ended August with 1,235,335 accounts, up 53,621 in a month.Its accounts make up more than 40% of the 3,029,784 registered with the Central Securities Depository of Poland (KDPW). The two measures differ, as KDPW counts every registered account, funded or not.London's trading industry is coming home!Lynx is not the only foreign broker moving on Poland, which generated 54.4% of XTB's revenue in 2025.Trade Nation launched zloty accounts on the same day, and Trade Republic entered the country in September 2025 as its first market outside the euro zone. Each has picked a different part of XTB's business.Lynx Goes After Active Stock TradersLynx has served Polish clients since 2017, according to its careers page, and now lists a Polish branch of Lynx B.V. in central Warsaw. Founded in 2006, it is supervised by the Dutch Authority for the Financial Markets (AFM) and De Nederlandsche Bank (DNB).Lynx works as an introducing broker for the Irish unit of Interactive Brokers, which executes orders and holds client assets. Interactive Brokers reported client equity of $962.8 billion in August.Clients reach more than 100 exchanges through Lynx's own app or Interactive Brokers' Trader Workstation, with support in Polish. Lynx will also issue the PIT-8C, the annual statement Polish brokerages send clients for capital gains tax, Parkiet reported."We grow gradually, country by country, not everywhere at once," Lynx CEO Ellen van Ginkel said in comments published by Parkiet.She pointed to the number of active Polish brokerage accounts, which she said had more than tripled since 2019, as the reason for a local team.The product list includes options and futures. XTB added options to its Polish terms of service in June and already sells them in Cyprus, Germany and Spain. In July, XTB CEO Omar Arnaout called the Polish launch a matter of time.XTB has kept adding features for the same traders. On October 7 it began rolling out 24-hour weekday trading in selected US shares to Polish clients.Trade Nation Brings Fixed-Spread CFDsTrade Nation's Polish service runs under its license from the Portuguese Securities Market Commission (CMVM), passported into Poland, the company said. It offers contracts for difference (CFDs) in zloty accounts with fixed spreads.New markets include the Poland 20 index and shares of Allegro, CD Projekt, Orlen and Żabka. The London-based firm acquired FXCM's UK client book earlier this month."Poland has one of the most active and sophisticated trading communities in Europe," Trade Nation Chief Executive Jon Noble said.CFDs still drive XTB's results. They generated about 96% of its result from financial instruments in the first half of 2026, even as most new clients started with stocks and ETFs.The Polish Financial Supervision Authority (KNF) counted 369,737 active OTC derivatives clients at domestic brokerages in 2025, up 50% from a year earlier. One bank is moving the other way: mBank stopped signing new mForex agreements on September 3.Trade Republic Took the Savings RouteTrade Republic opened in Poland with a flat trading fee of 4 zlotys and a savings account paying the central bank rate, the company said at launch. Its arrival coincided with mBank and DM BOŚ dropping commissions on ETFs held in retirement accounts.The German firm runs its Polish business under its German banking license and offers stocks, ETFs and crypto with local IBAN accounts. In May it raised the rate on Polish cash balances to 6%, Bankier reported.Crypto is one product XTB cannot yet sell from Poland. Arnaout said in July the company would offer it once the European Union's Markets in Crypto-Assets Regulation (MiCA) is implemented in Polish law.The pool of idle cash is large. Poles hold more than 1 trillion zlotys in current accounts paying little or no interest, plus about 420 billion zlotys in term deposits, said Arkadiusz Jóźwiak, editor-in-chief of Polish financial news site Comparic.pl."There is a lot to fight for," Jóźwiak told FinanceMagnates.com.Jóźwiak said many Polish brokerages followed XTB into commission-free trading in stocks and ETFs, and that newcomers face clients used to good terms from local and foreign firms alike.Neither Trade Republic nor Lynx appears in the KDPW figures, which cover only domestic institutions. The same gap applies to Revolut, which reported 590,000 Polish investment accounts a year ago under its Lithuanian license.This article was written by Damian Chmiel at www.financemagnates.com.