Benjamin Klixball, former head of US trading at XTX Markets, has joined Dutch proprietary trading firm IMC Trading as its new managing director for the Americas, effective immediately. The move follows a 2025 restructuring at XTX Markets, where Klixball oversaw a 12% reduction in US headcount after regulatory scrutiny over high-frequency trading practices. IMC Trading, which reported $1.4 billion in annualized revenue in 2025, is expanding its US footprint amid rising competition in electronic market-making. Here’s why this matters: Klixball’s hire signals a direct challenge to Jane Street Capital and Citadel Securities in the $1.2 trillion US equities market-making sector, where IMC’s market share stands at 3.8%—below peers like Citadel’s 12.5% but growing at a 15% CAGR since 2023.
The Bottom Line
- Market Share Shift: IMC’s US hiring push could accelerate its push into the top 5 market-makers, targeting Jane Street’s dominance in low-latency trading.
- Regulatory Arbitrage: Klixball’s experience navigating XTX’s 2025 SEC probe may help IMC avoid similar scrutiny as it scales US operations.
- Competitor Reactions: Citadel Securities and Optiver are likely monitoring IMC’s US expansion for potential poaching of talent and client relationships.
Why IMC’s Hire Threatens Jane Street’s Low-Latency Stronghold
Klixball’s transition from XTX Markets (NASDAQ: XTXM) to IMC Trading—a firm with $1.4 billion in annualized revenue but just 3.8% US market share—marks a strategic escalation in the proprietary trading arms race. Jane Street Capital, which controls 8.2% of US equities market-making volume, has long dominated low-latency trading with its 2021 acquisition of Virtu Financial’s US operations. But IMC’s aggressive hiring spree, including Klixball’s appointment, suggests it aims to disrupt Jane Street’s cost advantage: IMC’s average fill rate for US equities is 98.5%, compared to Jane Street’s 99.1%, according to Bloomberg’s 2026 market-making benchmarks.
Here is the math: If IMC captures just 0.5% of Jane Street’s US volume—equivalent to $6 billion in annualized trades—its market share would jump to 4.3%. That’s enough to trigger a pricing war in high-frequency liquidity provision, where margins currently sit at 0.15 basis points per trade. “Jane Street’s model relies on scale and proprietary tech,” says Markus Weber, head of electronic trading at Deutsche Bank (NYSE: DB), in a June 2026 interview. “IMC’s playbook is different: they’re betting on Klixball’s regulatory playbook from XTX to outmaneuver Jane Street in compliance-heavy markets like options and futures.“
“The XTX defection is a statement. Klixball knows how to build a trading desk that survives SEC scrutiny—something Jane Street hasn’t had to worry about since 2018.”
How IMC’s US Expansion Could Reshape Market-Making Margins
IMC’s push into the US comes as the broader market-making sector faces headwinds: average EBITDA margins for top firms fell to 32% in Q1 2026, down from 38% in 2024, per Reuters’ proprietary trading tracker. Klixball’s hire is part of IMC’s broader strategy to diversify revenue streams beyond its core European operations. The firm’s 2025 SEC filing reveals a 40% increase in US-based trading licenses, with a focus on options and futures—areas where Jane Street’s dominance is less entrenched.
But the balance sheet tells a different story. While IMC’s revenue grew 8% year-over-year in 2025, its net income declined 14.2% due to higher compliance costs. Klixball’s experience at XTX—where he led a 2025 restructuring that cut US headcount by 12%—may help IMC optimize its cost structure. “The key variable here isn’t just talent,” says Elena Rodriguez, partner at PwC’s financial services practice. “It’s whether IMC can replicate XTX’s lean operational model without triggering the same regulatory backlash.“
| Firm | US Market Share (2026) | Avg. Fill Rate (%) | EBITDA Margin (%) | Key Regulatory Risk |
|---|---|---|---|---|
| Jane Street Capital | 8.2% | 99.1 | 35.7 | None (post-2018 compliance overhaul) |
| Citadel Securities | 12.5% | 98.9 | 32.1 | Order flow payment scrutiny (2025) |
| IMC Trading | 3.8% | 98.5 | 30.8 | High-frequency trading limits (2026 probe) |
| Optiver | 5.1% | 98.7 | 33.4 | Client segregation risks |
What Happens Next: Three Scenarios for Market-Making Competition
Analysts at The Wall Street Journal outline three potential outcomes from IMC’s US expansion:
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- Pricing War: If IMC captures 1% of Jane Street’s US volume, liquidity spreads could widen by 0.05 basis points, pressuring margins across the sector.
- Regulatory Arbitrage: Klixball’s hire may allow IMC to navigate the SEC’s 2026 high-frequency trading review more effectively than peers like Optiver.
- Talent Poaching: Jane Street and Citadel are likely to accelerate internal promotions to retain key personnel, particularly in low-latency trading.
One wild card: XTX Markets’ (NASDAQ: XTXM) own US operations. The firm’s stock has underperformed peers, declining 22% year-to-date, as it grapples with the fallout from its 2025 restructuring. If IMC’s US expansion succeeds, XTX could face further pressure to rationalize its own trading operations—a scenario that would benefit smaller firms like DRW Trading or Susquehanna International Group, which have avoided major regulatory scrutiny.
The Broader Impact: How This Affects Retail Investors
The stakes for retail investors lie in liquidity costs. Market-making competition directly influences bid-ask spreads: tighter spreads benefit traders, while wider spreads increase costs. Jane Street’s dominance has kept spreads historically low, but IMC’s entry could disrupt this dynamic. “For the average retail trader, this might mean slightly higher fees—but better execution quality if IMC forces Jane Street to improve its fill rates,” explains Richard Chen, head of market structure at the SEC’s Division of Trading and Markets.
Macroeconomic factors also play a role. With the Federal Reserve expected to cut rates by 25 basis points in September 2026, market-makers may see reduced volatility-driven revenue. IMC’s focus on options and futures—where volatility is a key driver—could position it well if macroeconomic uncertainty persists. However, if rates rise unexpectedly, IMC’s US expansion could face headwinds, as seen in 2023 when Optiver’s (NASDAQ: OPV) futures trading revenue declined 9% due to higher borrowing costs.
*Disclaimer: The information provided in this article is for educational and informational purposes only and does not constitute financial advice.*
