A stablecoin OTC desk is an over-the-counter trading venue that intermediates large stablecoin orders bilaterally, outside central order books, with negotiated pricing and settlement terms. Institutional treasuries, payment companies, and fund managers route block flow through these desks to access deeper liquidity than exchange books carry. The 2026 desk landscape is concentrated among four names that move the majority of nine-figure stablecoin tickets: B2C2, Wintermute, Cumberland (DRW), and GSR. Stablecoin transfer volume reached $27.6T in 2024, exceeding Visa and Mastercard combined, per Artemis and Dune data published in January 2025. That scale is what makes desk selection a treasury question, not a trading desk preference.
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This guide compares the four desks across token coverage, minimums, settlement rails, and geographic reach, then maps each one to the buyer scenarios where it tends to win. It closes on a structural point Eco has been making for two years: as desk inventory fragments across counterparties, the platform layer that aggregates that inventory into a single settlement path becomes the part of the stack institutions integrate against.
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Institutions route offexchange because central limit order books cannot absorb nine-figure stablecoin tickets without price impact, and because bilateral settlement lets counterparties customize timing, custody, and reporting. The Bank for International Settlements estimated that OTC crypto desks intermediate 60 to 65 percent of institutional spot flow above $1 million. Desk relationships also provide pre-trade RFQ pricing across multiple tokens at once.
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The desks themselves now sit inside a stratifying stablecoin market. Total stablecoin supply reached roughly $315B by mid-2026 on DeFiLlama data, led by USDT at $187.2B and USDC at $75.6B, with newer issuers like PayPal's PYUSD, BlackRock's BUIDL, and Ripple's RLUSD all clearing $1B in circulation. As the issuer set broadens, treasuries and payment companies increasingly need access to multiple tokens at block size, which has expanded the role of desks beyond simple BTC and ETH coverage. The BIS Quarterly Review framed this as the offexchange share of institutional crypto flow becoming structural rather than cyclical.
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For an institutional buyer, the question is no longer whether to use an OTC desk, but which desks to onboard, how to compare their executable inventory in real time, and how to route settlement so balance sheets are not stranded across counterparties.
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B2C2 is a London-headquartered liquidity provider, owned by Japan's SBI Holdings, that quotes principal prices across crypto and stablecoin pairs from its own balance sheet. The desk runs 24/7 electronic market-making with API and chat RFQ, and is regulated under the UK FCA cryptoasset regime and JFSA in Japan. B2C2 settled roughly $1.7T of OTC volume in 2024 across spot and CFD, per SBI's parent filings.
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B2C2 leans into stablecoin and fiat pairs more than most peers, with deep two-way pricing in USDC, USDT, and the major fiat legs (USD, EUR, GBP, JPY, SGD). That makes it a natural counterparty for payment companies that need to mint or redeem stablecoins against fiat at size, and for hedge funds running USD-quoted stablecoin basis trades. SBI's FY2024 investor materials referenced the desk's stablecoin growth as the fastest segment of group cryptoasset revenue.
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The trade-off is breadth of crypto coverage. B2C2 prioritizes a focused, balance-sheet-intensive book of liquid pairs over the long tail of altcoins or onchain primary mint access. For a buyer whose flow is USDC, USDT, and the four major fiat pairs, that focus is the feature.
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Wintermute is a London-based algorithmic trading firm that provides liquidity across centralized venues, decentralized exchanges, and bilateral OTC tickets. Its OTC arm offers RFQ across more than 400 assets with API, Telegram, and portal access, and reports over $5T of cumulative OTC volume since inception, with stablecoin pairs the fastest-growing segment per its 2025 year-end report.
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For stablecoin buyers, Wintermute's distinguishing feature is breadth of token coverage on a single ticket. The desk quotes USDC, USDT, PYUSD, FDUSD, USDe, FRAX, and emerging issuer tokens like RLUSD and USDS, plus paired liquidity into majors and the long tail. That makes it a frequent counterparty for crypto-native treasuries rebalancing between stablecoins, and for market makers sourcing inventory for onchain venues. Wintermute also publishes monthly volume reports and onchain wallet labels via Dune dashboards that the institutional community uses to track flow share.
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Where B2C2 anchors on fiat pairs, Wintermute anchors on cross-stablecoin and stablecoin-to-crypto pricing. Its onchain footprint also means it executes a meaningful share of large DEX prints, blurring the line between OTC and onchain liquidity access.
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Cumberland is the digital asset trading arm of Chicago proprietary trading firm DRW, founded in 2014, and is one of the original institutional OTC counterparties in crypto. The desk operates 24/7 globally, quotes through its Marea API and voice trading lines, and historically clears some of the largest single-ticket stablecoin blocks in the market, with minimum trade sizes that effectively start at the mid six figures.
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Cumberland's positioning is conservative, balance-sheet-driven, and credit-relationship-led. It tends to serve asset managers, family offices, and corporates that already have DRW-tier counterparty diligence in place, and that value execution discretion on tickets where information leakage matters. USDT and USDC are the core stablecoin legs, with fiat settlement through traditional banking rails. The CFTC's enforcement and settlement docket includes prior interactions with the firm, which institutional compliance teams typically review during onboarding via the CFTC press release archive.
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For a buyer whose primary requirement is moving a single nine-figure block with minimal market footprint and an established U.S. regulatory paper trail, Cumberland remains the default short list.
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GSR is a global liquidity firm founded in 2013 with offices in London, Singapore, New York, and Zug, known for derivatives market-making alongside spot and stablecoin OTC. The desk offers spot, options, structured products, and bespoke yield strategies, with RFQ access via API and chat, and is regulated under multiple regimes including the U.S. (FinCEN MSB) and Singapore (MAS exemption).
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For stablecoin buyers, GSR is most useful when the underlying flow has a derivatives component. Treasuries hedging stablecoin reserves against rate or FX exposure, market makers offloading delta from options books, and tokenization issuers structuring redemption-linked products typically value GSR's ability to package spot stablecoin execution with options or forward overlays. GSR has also been an active liquidity provider into onchain venues and has published research on stablecoin market microstructure that institutional desks track through its research portal.
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Where Cumberland leads on block discretion and B2C2 on fiat pairs, GSR leads on settlement optionality: the trade can be spot, forward, or option-overlaid, with multi-jurisdiction settlement rails. That flexibility tends to matter more as treasuries get more sophisticated about reserve management.
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Stablecoin OTC desks differ from exchange liquidity in pricing model, ticket size, settlement, and information leakage. Desks quote bilaterally as principal against their own book, settle on negotiated rails offexchange, and absorb nine-figure tickets without moving a public order book. Exchange liquidity is anonymous, continuous, and best for sub-million flow where price discovery matters more than discretion.
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Three structural differences drive the choice. First, price impact: even on USDC and USDT, exchange books rarely absorb a $50M ticket without slippage measured in basis points, while a desk quotes a single all-in price for the full size. Second, settlement: desks settle to specific custody addresses, fiat accounts, or prime broker relationships on T+0 or same-day, while exchanges require depositing inventory onto venue. Third, reporting: bilateral execution leaves a private audit trail rather than a public print, which matters for treasuries that do not want competitors reading their rebalancing flows. The IOSCO crypto policy work, summarized in its 2023 final report, treats this distinction explicitly when scoping market integrity rules.
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The practical implication for treasuries is that OTC and exchange are complements, not substitutes. Smaller, time-sensitive flow runs onexchange. Block flow, mint and redeem flow, and any trade where information leakage carries cost runs through a desk.
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The four desks differ on four dimensions a buyer can compare directly: which stablecoins they quote at size, their effective minimum ticket, the settlement rails they support, and where their regulatory and physical footprint lets them onboard counterparties. The table below summarizes the public picture as of Q2 2026, based on desk disclosures and publicly available regulatory filings.

None of these dimensions are static. Token coverage shifts as issuers like Circle, PayPal, and Ripple expand mint relationships, and minimums move with desk inventory and balance sheet appetite. The right way to use the table is as a starting point for an onboarding short list, with executable RFQ pricing as the real comparator. DeFiLlama's stablecoin dashboard is a useful cross-reference for which issuers actually carry the supply a desk claims to cover.
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Desk fit depends on the buyer's flow shape. Corporate treasuries hedging reserves favor B2C2 or GSR for fiat-paired execution. Payment companies minting and redeeming stablecoins at scale lean on B2C2 and Cumberland for bank-rail settlement. Crypto-native treasuries rebalancing across issuers lean on Wintermute for token breadth. Market makers and structured-product desks lean on GSR for derivatives overlays.
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Three scenarios map cleanly onto desk choice. A payments company rebalancing $200M monthly between USD bank accounts and USDC for cross-border settlement typically prioritizes fiat settlement reliability and KYC posture, which steers toward B2C2 and Cumberland. USDC monthly onchain settlement averaged $1.1T in 2025 per the Circle State of the USDC Economy report, and the share intermediated through OTC desks is what makes that volume executable at predictable cost. A tokenization issuer redeeming a mixed basket of USDC, PYUSD, and RLUSD into USD on quarter-end leans on Wintermute for the cross-stablecoin leg and on a desk like GSR for any forward-dated structure. A hedge fund liquidating a single $150M USDT position with information sensitivity prefers Cumberland's voice block channel.
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The pattern: no single desk wins every scenario. The institutional preference is to onboard two or three, then route each ticket to the best price for that flow shape.
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Above the desk layer sits an orchestration layer that aggregates OTC inventory, primary mint access, and onchain liquidity into a single integration. The institutional pain point is well established: counterparties do not want to run KYB with twelve venues, manage twelve settlement workflows, or reconcile twelve sets of post-trade reports. A neutral platform that aggregates pricing across desks and routes to the best execution path is the structural answer.
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This is the layer Eco occupies. Eco is not a market maker and does not trade its own book. It is a neutral platform that aggregates primary mint access from issuers, onchain liquidity, and offchain RFQ inventory from desks like B2C2 and others, surfacing them through one API and one settlement path. The institutional value proposition is composability across markets: one integration, one set of best-execution analytics, one reconciliation surface, regardless of whether a given ticket is filled from a desk inventory, a mint endpoint, or onchain liquidity. The Federal Reserve's FEDS Notes work on payments orchestration uses similar framing for traditional payment networks: the value of the routing layer grows as the venues it connects fragment.
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As issuer count grows and desk specialization deepens, the orchestration layer is what lets a treasury or payment company treat the stablecoin market as a single liquidity pool rather than as twelve bilateral relationships. That is the part of the stack Eco is building, and the part that determines whether stablecoin OTC inventory remains a relationship business or becomes infrastructure.
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Stablecoin supplies and market totals are drawn from the DeFiLlama stablecoin dashboard as of 2026-06-05. Stablecoin transfer volume of $27.6T in 2024 is from Artemis and Dune data published January 2025. OTC desk intermediation share is from the BIS Quarterly Review, December 2024. USDC monthly onchain settlement of $1.1T in 2025 is from the Circle State of the USDC Economy, 2025. B2C2 OTC volume of approximately $1.7T in 2024 is from SBI Holdings FY2024 investor materials, May 2025. Wintermute cumulative OTC volume of more than $5T is from its 2025 year-end report. Desk-specific minimums, token coverage, and settlement rails are summarized from public desk disclosures, regulatory filings, and standard institutional onboarding documentation as of Q2 2026; executable terms vary by counterparty and ticket.
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