- IQDY — FlexShares International Quality Dividend Dynamic Index Fund
- IQHI — NYLI MacKay High Income ETF
- IQI — Invesco Quality Municipal Income Trust
- IQIN — IQ 500 International ETF
- IQLT — iShares MSCI Intl Quality Factor ETF
- IQMD — Intelligent Medicine Acquisition Corp.
- IQMDU — Intelligent Medicine Acquisition Corp.
- IQMDW — Intelligent Medicine Acquisition Corp.
- IQMM — ProShares - GENIUS Money Market ETF
- IQMX — IQM Quantum Computers Oyj
- IQMXW — IQM Quantum Computers Oyj
- IQNT — Inteliquent, Inc.
- IQQ — iShares Nasdaq 100 ETF
- IQQQ — ProShares - Nasdaq-100 High Income ETF
- IQRA — NYLI CBRE Real Assets ETF
- IQSI — NYLI Candriam International Equity ETF
- IQSM — NYLI Candriam U.S. Mid Cap Equity ETF
- IQST — iQSTEL Inc.
- IQSU — NYLI Candriam U.S. Large Cap Equity ETF
- IQSZ — Invesco Global Equity Net Zero ETF
- IQV — IQVIA Holdings Inc.
- IR — Ingersoll Rand Inc.
- IRAB — Iris Acquisition Corp II
- IRACX — CIM Real Assets & Credit Fund
- IRBA — iM RBA Responsible Global Allocation ETF
- IRBO — iShares Robotics and Artificial Intelligence Multisector ETF
- IRBT — iRobot Corporation
- IRCP — IRSA Propiedades Comerciales S.A.
- IRD — Opus Genetics, Inc.
- IRDM — Iridium Communications Inc.
- IRE — Daily Target 2X Long IREN ETF
- IREG — Leverage Shares 2x Long IREN Daily ETF
- IREN — IREN Limited
- IRET — iREIT - MarketVector Quality REIT Index ETF
- IRFAX — Cohen & Steers International Realty Fund Class A
- IRHG — Global X Interest Rate Hedge ETF
- IRHO — Iron Horse Acquisitions II Corp. Common Stock
- IRHOR — Iron Horse Acquisitions Corp. II Rights
- IRHOU — Iron Horse Acquisitions Corp. II Units
- IRIX — IRIDEX Corporation
- IRL — The New Ireland Fund, Inc.
- IRM — Iron Mountain Incorporated
- IRMD — IRadimed Corporation
- IRNT — IronNet, Inc.
- IROH — Iron Horse Acquisitions Corp. Common Stock
- IROHR — Iron Horse Acquisitions Corp. Right
- IROHU — Iron Horse Acquisitions Corp. Unit
- IROHW — Iron Horse Acquisitions Corp. Warrant
- IRON — Disc Medicine, Inc.
- IROQ — IF Bancorp, Inc.
- IRRX-UN — Integrated Rail and Resources Acquisition Corp.
- IRRXU — Integrated Rail and Resources Acquisition Corp.
- IRS — IRSA Inversiones y Representaciones Sociedad Anónima
- IRT — Independence Realty Trust, Inc.
- IRTC — iRhythm Technologies, Inc.
- IRTR — iShares LifePath Retirement ETF
- IRVH — Global X - Interest Rate Volatility & Inflation Hedge ETF
- IRWD — Ironwood Pharmaceuticals, Inc.
- IS — ironSource Ltd.
- IS.TO — Infrastructure Dividend Split Corp.
- ISAA — Iron Spark I Inc.
- ISARX — AB Cap Fund, Inc. - AB International Strategic Core Portfolio - A
- ISBA — Isabella Bank Corporation
- ISBC — Investors Bancorp, Inc.
- ISC.TO — Information Services Corporation
- ISCB — iShares Morningstar Small-Cap ETF
- ISCF — iShares International Small-Cap Equity Factor ETF
- ISCG — iShares Morningstar Small-Cap Growth ETF
- ISCV — iShares Morningstar Small-Cap Value ETF
- ISD — PGIM High Yield Bond Fund, Inc.
- ISDR — Issuer Direct Corporation
- ISDS — Invesco RAFI Strategic Developed ex-US Small Company ETF
- ISDX — Invesco RAFI Strategic Developed ex-US ETF
- ISEE — IVERIC bio, Inc.
- ISEM — Invesco RAFI Strategic Emerging Markets ETF
- ISEP — Intl Developed Power Buffer ETF
- ISGI.V — InsuraGuest Technologies Inc.
- ISHG — iShares 1-3 Year International Treasury Bond ETF
- ISHP — First Trust S-Network E-Commerce ETF
- ISIF.TO — IA Clarington Strategic Income Fund
- ISIG — Insignia Systems, Inc.
- ISLE — Isleworth Healthcare Acquisition Corp.
- ISLEW — Isleworth Healthcare Acquisition Corp.
- ISMD — Inspire Small/Mid Cap ETF
- ISNR — Snow Rothschild Acquisition Corp.
- ISNRU — Snow Rothschild Acquisition Corp. Units
- ISNRW — Snow Rothschild Acquisition Corp. Warrants
- ISNS — Autoscope Technologies Corporation
- ISO — IsoPlexis Corporation
- ISO.V — IsoEnergy Ltd.
- ISOU — IsoEnergy Ltd.
- ISPC — iSpecimen Inc.
- ISPO — Inspirato Incorporated
- ISPOW — Inspirato Incorporated
- ISPR — Ispire Technology Inc.
- ISR — Isoray, Inc.
- ISRA — VanEck Israel ETF
- ISRG — Intuitive Surgical, Inc.
- ISRL — Israel Acquisitions Corp
- ISRLU — Israel Acquisitions Corp Unit
