William Blair Investment Management, Llc - Significant Ownership

Signature - Title
Walter R. Randall, Jr. - Chief Compliance Officer
Location
Chicago, IL
Summary
This page shows a list of all the recent SCHEDULE 13D/G filings made by William Blair Investment Management, Llc.

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Significant Ownership of William Blair Investment Management, Llc

Sym Company Class Ownership Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BWIN Baldwin Insurance Group, Inc. Common Stock 10.9% $176M $65.3M 7.8M +58.9% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Nov 30, 2025
ACVA ACV Auctions Inc. Common Stock 6.6% $164M -$15.2M 11.1M -8.45% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
TWST Twist Bioscience Corp Common Stock 6.4% $153M $34.4M 3.81M +29.1% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
EYE National Vision Holdings, Inc. Common Stock 6.2% $143M 4.9M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
FOXF FOX FACTORY HOLDING CORP Common Stock 5.9% $52.4M -$10.7M 2.48M -17% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
TMCI TREACE MEDICAL CONCEPTS, INC. Common Stock 5.8% $24.6M 3.66M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
PWP Perella Weinberg Partners Common Stock 5.7% $78.4M 3.68M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
FOLD AMICUS THERAPEUTICS, INC. Common Stock 5.2% $126M $9.42M 16M +8.09% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
DOCS Doximity, Inc. Common Stock 4.9% $353M 6.23M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Dec 31, 2024
CWAN Clearwater Analytics Holdings, Inc. Common Stock 4.8% $214M 9.41M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Dec 31, 2024
LOCO El Pollo Loco Holdings, Inc. Common Stock 4.8% $13.6M -$589K 1.44M -4.14% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
BCO BRINKS CO Common Stock 4.7% $175M -$32.2M 1.96M -15.5% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
ZIP ZIPRECRUITER, INC. Common Stock 4.6% $18.3M -$9.33M 3.65M -33.8% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
WGS GeneDx Holdings Corp. Common Stock 4.3% $133M -$42.6M 1.24M -24.3% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
TBBB BBB FOODS INC Common Stock 4.3% $73.3M 2.64M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
NEOG NEOGEN CORP Common Stock 4.3% $44.9M 9.4M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
MRCY MERCURY SYSTEMS INC Common Stock 4.2% $196M -$168M 2.53M -46.2% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
ADTN ADTRAN Holdings, Inc. Common Stock 4.2% $25.9M 3.35M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
MEG Montrose Environmental Group, Inc. Common Stock 3.7% $36.1M -$27.5M 1.32M -43.3% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sep 30, 2025
GDEN GOLDEN ENTERTAINMENT, INC. Common Stock 3.6% $25.8M 999K WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Dec 31, 2024
LRN Stride, Inc. Common Stock 2.5% $148M -$184M 1.1M -55.4% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
RVLV Revolve Group, Inc. Common Stock 2.4% $20.4M -$51.8M 986K -71.7% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
FLYW Flywire Corp Common Stock 1.2% $13.2M 1.5M WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Mar 31, 2025
OEC Orion S.A. Common Stock 1.2% $7.13M -$30.2M 680K -80.9% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025
NFE New Fortress Energy Inc. Common Stock 0% $233K 56.1K WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Jun 30, 2025

Schedules 13D/G Reported by William Blair Investment Management, Llc:

Sym Target Class Ownership Change Current Shares Change Value Reporting name Form Report Period Date Filed
* An asterisk sign (*) next to the price indicates that the price is likely invalid.