Stouff Capital is an absolute-return manager using a quantitative and fundamental equity process with convexity overlays. Website or institutional source

Stone Coast Fund Services is an independent administrator focused on hedge funds and other complex alternative investment vehicles. Website or institutional source

StoneX Prime Services provides execution, financing, custody, securities lending, outsourced trading, capital introduction, risk reporting, and operational support to hedge funds, family offices, mutual funds, and investment managers. Website or institutional source

Sterling Trading Tech provides order management, trading interfaces, market access, infrastructure, and real-time risk and margin tools for broker-dealers, clearing firms, professional traders, and institutional market participants. Website or institutional source

State Street is a global asset-servicing institution whose fund-administration capabilities operate within a broad platform spanning custody, accounting, transfer agency, regulatory reporting, data, analytics, collateral, markets, and investment-management technology. Website or institutional source

Starboard Value is a dedicated activist manager best known for operationally detailed campaigns at underperforming public companies. Website or institutional source

Standard Chartered provides prime services, custody, fund services, over-the-counter clearing, fixed-income prime custody, and cross-service margining through a network focused on Asia, Africa, and the Middle East. Website or institutional source

SRS Investment Management is a fundamental investment firm managing public-equity, hedge-fund, long-only, and special-opportunities strategies. Website or institutional source

Squarepoint Capital is a global quantitative investment manager using a systematic and diversified approach across asset classes, trading frequencies, and markets. Website or institutional source

SPX Capital is a global investment firm with a major macro strategy rooted in Brazil and expanded international operations. Website or institutional source

Sprott is a global asset manager specializing in precious metals and critical materials. Website or institutional source

Société Générale Prime Services & Clearing provides financing, securities lending, execution, clearing, derivatives, synthetic exposure, and related institutional services. Website or institutional source

Solovis Risk Pro, formerly Venn Pro, provides factor-based risk and return analysis across public and private holdings. Website or institutional source

Social Market Analytics provides machine-readable sentiment, attention, and social-media indicators for equities, exchange-traded funds, currencies, commodities, and other traded assets. Website or institutional source

smartTrade provides multi-asset electronic trading and payments technology across foreign exchange, precious metals, money markets, fixed income, crypto, and derivatives. Website or institutional source

SIX Financial Information supplies reference data, corporate actions, pricing, market data, tax and regulatory information, securities identifiers, and related services to financial institutions. Website or institutional source

Similarweb is a digital-intelligence company providing estimated website traffic, app engagement, audience behavior, referral sources, search activity, advertising intelligence, and competitive analytics. Website or institutional source

Sensor Tower provides digital-market intelligence across mobile apps, publishers, advertising, audience behavior, and the wider digital economy. Website or institutional source

SEI Investment Manager Services provides operating infrastructure to traditional and alternative asset managers through fund administration, accounting, investor services, middle-office outsourcing, data, regulatory support, and technology-enabled reporting. Website or institutional source

SEB Prime Finance provides securities lending, portfolio swaps, margin lending, derivatives, execution, custody reporting, risk support, and capital introduction. Website or institutional source