Luminex Trading & Analytics LLC

Luminex Trading & Analytics LLC is a US equities alternative trading system (ATS) built by and for the buy side. Founded in 2015, it was designed to give institutional investors — asset managers, pension funds, insurers and similar long-only or long-biased participants — a venue where they could trade large blocks of stock with natural, buy-side-only counterparties rather than interacting primarily with sell-side market makers. The platform is operated today by LeveL Markets, LLC, a consortium-owned organization formed in 2022 through the merger of LeveL and Luminex. LeveL Markets owns and operates both the LeveL ATS and the Luminex ATS. Luminex's core proposition is block liquidity. Its user base is restricted to the buy side, which the firm argues produces "unique flow" and "natural flow" that is less toxic than flow found on venues dominated by high-frequency market makers. The venue markets itself on consistently ranking highly among competitors for average block trade size, citing FINRA data, and on offering diverse counterparties including transition management and outsourced trading desks. Access is provided through multiple channels: a proprietary user interface, broker routes, service bureaus and broker-sponsored access, so that buy-side firms can reach Luminex liquidity through their existing order-management and execution-management systems. As of March 2026, Luminex reported an average block size of 40,801 shares and total notional traded of $9.8 billion for the month, a figure that includes both sides of Luminex ATS executions and Luminex shares routed to and executed on the LeveL ATS. The firm also highlights optionality features such as workflow options and liquidity options, including access to brokerage flow via its unique ownership structure while maintaining the ability to seek natural blocks simultaneously. Luminex is part of a broader LeveL Markets effort to connect buy- and sell-side participants to a wider universe of equities liquidity through partnerships and trading technology. These partnerships include Turquoise, Nasdaq Canada and other venues, and the firm works with a range of OMS/EMS providers and brokers — among them Bernstein, BMO, CLSA Americas, TD Cowen, Raymond James, Fidelity, Evercore, Jefferies, Jones Trading and Piper Sandler — to give clients connectivity to its liquidity. LeveL Markets is headquartered in Boston with additional team locations in Charleston, Chicago, New York, California and Florida, and is led by CEO Steve Miele. Because Luminex is a private, consortium-owned broker-dealer and ATS rather than a listed company, it does not report public earnings or trade on an exchange. Its relevance in the market is as a block-trading venue and as a piece of market-structure infrastructure owned by the buy side itself, a structure intended to align the venue's incentives with those of its users.

Luminex Trading & Analytics LLC was founded in 2015 as a buy-side-owned alternative trading system for US equities. The venue was created by a group of institutional investors who wanted a block-trading platform whose incentives were aligned with the buy side rather than with sell-side market makers. Its design restricted participation to buy-side firms, producing what the firm describes as "unique flow" and "natural flow" from a buy-side-only user base. For several years Luminex operated as an independent ATS. In 2022, it merged with LeveL, another ATS, to form LeveL Markets, LLC, a consortium-owned organization. Following the merger, LeveL Markets owns and operates both the LeveL ATS and the Luminex ATS. The combined entity describes itself as "Built by the Buy-Side for the Buy-Side" and continues to emphasize block liquidity, diverse counterparties and multiple access points. Under LeveL Markets, Luminex has been positioned as part of a broader effort to connect buy- and sell-side participants to a wider universe of equities liquidity through partnerships and trading technology. The firm has established partnerships with venues such as Turquoise and Nasdaq Canada, and works with a range of OMS/EMS providers and brokers — including Bernstein, BMO, CLSA Americas, TD Cowen, Raymond James, Fidelity, Evercore, Jefferies, Jones Trading and Piper Sandler — to provide connectivity to its liquidity. It also offers broker-sponsored access, allowing buy-side firms to reach Luminex through their existing broker relationships. As of March 2026, Luminex reported an average block size of 40,801 shares and total notional traded of $9.8 billion for the month, a figure that includes both sides of Luminex ATS executions and Luminex shares routed to and executed on the LeveL ATS. The venue continues to market itself on consistently outranking competitors in average block trade size, citing FINRA data, and on offering workflow and liquidity optionality to its buy-side users. LeveL Markets is headquartered in Boston with team locations in Charleston, Chicago, New York, California and Florida, and is led by CEO Steve Miele.

• 2026

  As of March 2026, Luminex reports average block size of 40,801 shares and total notional traded of $9.8 billion for the month.

• 2022

  LeveL and Luminex merge to form LeveL Markets, LLC, a consortium-owned organization that owns and operates both the LeveL ATS and Luminex ATS.

• 2015

  Luminex Trading & Analytics LLC founded as a buy-side-only US equities ATS.

Buy-side-only block trading venue emphasizing natural flow, large block sizes and diverse counterparties, operated within the consortium-owned LeveL Markets structure.

• Luminex ATS

  A buy-side-only US equities alternative trading system focused on block liquidity, with access via proprietary UI, broker routes, service bureaus and broker-sponsored access.

• LeveLUp

  A LeveL Markets offering highlighted on the Luminex Trading page.

• Broker-Sponsored Access

  Allows buy-side firms to access Luminex liquidity through their existing broker relationships.

1. 1Luminex Trading | LeveL Marketslevelmarkets.com
2. 2About Us | LeveL Marketslevelmarkets.com
3. 3Luminex Trading & Analytics Llc - Wikidatawikidata.org