13D/13G Filings - WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Reported
DateTime
Transaction
Date
Type Company
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev Report View
2025-07-31
09:24 am
Sale
2025-06-30 13G Stride, Inc.
LRN
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,101,051
2.500%
-1,365,968decrease
(-55.37%)
Filing
History
2025-07-30
5:22 pm
Purchase
2025-06-30 13G BBB Foods Inc.
TBBB
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 2,639,241
4.300%
691,914increase
(+35.53%)
Filing
History
2025-07-30
1:01 pm
Sale
2025-06-30 13G Neogen Corporation
NEOG
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 9,403,020
4.300%
-3,868,914decrease
(-29.15%)
Filing
History
2025-07-30
12:38 pm
Sale
2025-06-30 13G ZipRecruiter, Inc.
ZIP
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 3,652,456
4.600%
-1,862,343decrease
(-33.77%)
Filing
History
2025-07-30
12:27 pm
Sale
2025-06-30 13G The Brink's Company
BCO
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,962,981
4.700%
-360,687decrease
(-15.52%)
Filing
History
2025-07-30
12:19 pm
Purchase
2025-06-30 13G GeneDx Holdings Corp.
WGS
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,631,402
5.700%
1,631,402increase
(New Position)
Filing
History
2025-07-30
12:04 pm
Purchase
2025-06-30 13G Montrose Environmental Group, Inc.
MEG
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 2,317,660
6.800%
414,272increase
(+21.76%)
Filing
History
2025-07-30
11:21 am
Sale
2025-06-30 13G Mercury Systems, Inc.
MRCY
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 4,695,683
7.900%
-676,515decrease
(-12.59%)
Filing
History
2025-05-09
5:00 pm
Sale
2025-03-31 13G Flywire Corporation
FLYW
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,497,586
1.200%
-10,078,278decrease
(-87.06%)
Filing
History
2025-05-09
4:54 pm
Sale
2025-03-31 13G ADTRAN Holdings, Inc.
ADTN
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 3,354,334
4.200%
-1,518,787decrease
(-31.17%)
Filing
History
2025-05-09
4:47 pm
Sale
2025-03-31 13G Amicus Therapeutics, Inc.
FOLD
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 14,778,651
4.900%
-804,311decrease
(-5.16%)
Filing
History
2025-05-09
4:42 pm
Sale
2025-03-31 13G El Pollo Loco Holdings, Inc.
LOCO
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,436,784
4.800%
-62,103decrease
(-4.14%)
Filing
History
2025-05-09
4:34 pm
Sale
2025-03-31 13G Revolve Group, Inc.
RVLV
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 985,530
2.400%
-2,497,322decrease
(-71.70%)
Filing
History
2025-05-09
4:13 pm
Purchase
2025-03-31 13G Montrose Environmental Group, Inc.
MEG
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 1,903,388
5.500%
1,903,388increase
(New Position)
Filing
History
2025-05-09
4:07 pm
Purchase
2025-03-31 13G Twist Bioscience Corporation
TWST
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 3,806,867
6.400%
857,144increase
(+29.06%)
Filing
History
2025-05-09
3:54 pm
Purchase
2025-03-31 13G ZipRecruiter, Inc.
ZIP
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 5,514,799
7.300%
1,004,922increase
(+22.28%)
Filing
History
2025-05-09
3:43 pm
Sale
2025-03-31 13G Fox Factory Holding Corp.
FOXF
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 2,476,501
5.900%
-506,981decrease
(-16.99%)
Filing
History
2025-05-09
3:32 pm
Sale
2025-03-31 13G ACV Auctions Inc.
ACVA
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 11,076,909
6.600%
-1,022,777decrease
(-8.45%)
Filing
History
2025-05-09
3:18 pm
Sale
2025-03-31 13G Mercury Systems, Inc.
MRCY
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 5,372,198
9.000%
-1,060,403decrease
(-16.48%)
Filing
History
2025-02-12
5:52 pm
Sale
2024-12-31 13G Mercury Systems, Inc.
MRCY
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 6,432,601
10.800%
-866,911decrease
(-11.88%)
Filing
History
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