William Blair Investment Management, LLC

Filing Details

13F-HR • 2025-03-31

SEC FilingSEC DataHachi Filing

Report Date: 2025-03-31
Filing Date: 2025-05-09
Total Holdings: 423
Total Value: 35621637487
Accession Number: 0001644956-25-000018
Form Type: 13F-HR
CIK: 0001644956
Manager Name: William Blair Investment Management, LLC

Data Enrichment

97% identified

410 identified13 unidentified

Holdings

SEC FilingSEC DataHachi Filing

Manager:

423 positions • $35,621,637.487K total value

423 positions

Manager:

SEC FilingSEC DataHachi Filing

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ServiceNow, Inc.

NOW|81762P102

366852(-9.2%)

Value:

$292.1B(-31.8%)

Salesforce, Inc.

CRM|79466L302

1083678(-8.0%)

Value:

$290.8B(-26.1%)

Yum China Holdings, Inc.

YUMC|98850P109

5423002(+7.1%)

Value:

$282.3B(+15.8%)

BRIGHT HORIZONS FAMILY SOLUTIONS INC.

BFAM|109194100

2211097(-6.7%)

Value:

$280.9B(+6.9%)

TransUnion

TRU|89400J107

3344290(-0.8%)

Value:

$277.5B(-11.2%)

CHEMED CORP

CHE|16359R103

441550(-6.8%)

Value:

$271.7B(+8.3%)

IDEXX LABORATORIES INC /DE

IDXX|45168D104

637111(+50.9%)

Value:

$267.6B(+53.3%)

Doximity, Inc.

DOCS|26622P107

4584467(-26.4%)

Value:

$266.0B(-20.0%)

Ferrari N.V.

RACE|N3167Y103

603138(+1.4%)

Value:

$258.1B(+2.1%)

EVEREST GROUP, LTD.

EG|G3223R108

702337(+9.3%)

Value:

$255.2B(+9.5%)

05589G102

5562470(+13.3%)

Value:

$248.6B(+30.7%)

CASELLA WASTE SYSTEMS INC

CWST|147448104

2216265(-16.1%)

Value:

$247.1B(-11.5%)

LAM RESEARCH CORP

LRCX|512807306

3323880(-2.5%)

Value:

$241.6B(-1.9%)

Dynatrace, Inc.

DT|268150109

5062075(+4.1%)

Value:

$238.7B(-9.7%)

Clearwater Analytics Holdings, Inc.

CWAN|185123106

8839660(-6.1%)

Value:

$236.9B(-8.5%)

Spotify Technology S.A.

SPOT|L8681T102

430398(+64.7%)

Value:

$236.7B(+102.5%)

MERCURY SYSTEMS INC

MRCY|589378108

5372198(-16.5%)

Value:

$231.5B(-14.3%)

Live Nation Entertainment, Inc.

LYV|538034109

1770553(-2.2%)

Value:

$231.2B(-1.4%)

Talen Energy Corp

TLN|87422Q109

1112993(-6.6%)

Value:

$222.2B(-7.4%)

Confluent, Inc.

CFLT|20717M103

9282825(-14.0%)

Value:

$217.6B(-27.9%)

Instrument	Shares		Other Manager	Value
Servicenow, Inc.(NOWcusip81762P102)	366.9K	QoQ -9.23% (-37.3K) YoY -3.78% (-14.4K)	All Managers (Combined)	$292.1M	QoQ -31.83% (-$136.4M) YoY +0.46% (-$1.4M)
Salesforce, Inc.(CRMcusip79466L302)	1.1M	QoQ -7.99% (-94.2K) YoY -22.31% (-311.3K)	All Managers (Combined)	$290.8M	QoQ -26.15% (-$103.0M) YoY -30.78% (-$129.3M)
Yum China Holdings, Inc.(YUMCcusip98850P109)	5.4M	QoQ +7.10% (+359.7K) YoY +15944.38% (+5.4M)	All Managers (Combined)	$282.3M	QoQ +15.75% (+$38.4M) YoY +21107.39% (+$281.0M)
Bright Horizons Family Solutions Inc.(BFAMcusip109194100)	2.2M	QoQ -6.71% (-159.2K) YoY +13.17% (+257.5K)	All Managers (Combined)	$280.9M	QoQ +6.90% (-$18.1M) YoY +26.83% (+$59.4M)
Transunion(TRUcusip89400J107)	3.3M	QoQ -0.78% (-26.5K) YoY NEW(+3.3M)	All Managers (Combined)	$277.5M	QoQ -11.18% (-$35.0M) YoY NEW(+$277.5M)
Chemed Corp(CHEcusip16359R103)	441.6K	QoQ -6.75% (-32.0K) YoY -4.56% (-21.1K)	All Managers (Combined)	$271.7M	QoQ +8.29% (-$20.8M) YoY -8.52% (-$25.3M)
Idexx Laboratories Inc /De(IDXXcusip45168D104)	637.1K	QoQ +50.92% (+215.0K) YoY +822.97% (+568.1K)	All Managers (Combined)	$267.6M	QoQ +53.30% (+$93.0M) YoY +617.87% (+$230.3M)
Doximity, Inc.(DOCScusip26622P107)	4.6M	QoQ -26.36% (-1.6M) YoY -17.10% (-945.9K)	All Managers (Combined)	$266.0M	QoQ -19.96% (-$66.4M) YoY +78.76% (-$117.2M)
Ferrari N.V.(RACEcusipN3167Y103)	603.1K	QoQ +1.42% (+8.5K) YoY +6.91% (+39.0K)	All Managers (Combined)	$258.1M	QoQ +2.15% (+$5.4M) YoY +4.93% (+$12.1M)
Everest Group, Ltd.(EGcusipG3223R108)	702.3K	QoQ +9.25% (+59.5K) YoY +57.59% (+256.7K)	All Managers (Combined)	$255.2M	QoQ +9.52% (+$22.2M) YoY +44.04% (+$78.0M)
(cusip05589G102)✕	5.6M	QoQ +13.34% (+654.9K) YoY +90.12% (+2.6M)	All Managers (Combined)	$248.6M	QoQ +30.68% (+$58.4M) YoY +193.60% (+$163.9M)
Casella Waste Systems Inc(CWSTcusip147448104)	2.2M	QoQ -16.06% (-424.2K) YoY -16.98% (-453.5K)	All Managers (Combined)	$247.1M	QoQ -11.54% (-$32.3M) YoY -6.37% (-$16.8M)
Lam Research Corp(LRCXcusip512807306)	3.3M	QoQ -2.53% (-86.4K) YoY NEW(+3.3M)	All Managers (Combined)	$241.6M	QoQ -1.90% (-$4.7M) YoY NEW(+$241.6M)
Dynatrace, Inc.(DTcusip268150109)	5.1M	QoQ +4.10% (-199.6K) YoY +14.07% (+624.6K)	All Managers (Combined)	$238.7M	QoQ -9.68% (-$25.6M) YoY +15.81% (+$32.6M)
Clearwater Analytics Holdings, Inc.(CWANcusip185123106)	8.8M	QoQ -6.07% (-571.6K) YoY -14.71% (-1.5M)	All Managers (Combined)	$236.9M	QoQ -8.53% (-$22.1M) YoY +29.21% (-$53.6M)
Spotify Technology S.A.(SPOTcusipL8681T102)	430.4K	QoQ +64.74% (+169.1K) YoY NEW(+430.4K)	All Managers (Combined)	$236.7M	QoQ +102.54% (+$119.9M) YoY NEW(+$236.7M)
Mercury Systems Inc(MRCYcusip589378108)	5.4M	QoQ -16.48% (-1.1M) YoY -15.79% (-1.0M)	All Managers (Combined)	$231.5M	QoQ -14.31% (-$38.7M) YoY +23.00% (-$43.3M)
Live Nation Entertainment, Inc.(LYVcusip538034109)	1.8M	QoQ -2.17% (-39.4K) YoY -51.27% (-1.9M)	All Managers (Combined)	$231.2M	QoQ -1.36% (-$3.2M) YoY -39.84% (-$153.1M)
Talen Energy Corp(TLNcusip87422Q109)	1.1M	QoQ -6.56% (-78.2K) YoY NEW(+1.1M)	All Managers (Combined)	$222.2M	QoQ -7.39% (-$17.8M) YoY NEW(+$222.2M)
Confluent, Inc.(CFLTcusip20717M103)	9.3M	QoQ -14.04% (-1.5M) YoY NEW(+9.3M)	All Managers (Combined)	$217.6M	QoQ -27.94% (-$84.4M) YoY NEW(+$217.6M)