Westfield Capital Management Co LP

Filing Details

13F-HR • 2025-03-31

SEC FilingSEC DataHachi Filing

Report Date: 2025-03-31
Filing Date: 2025-05-09
Total Holdings: 244
Total Value: 20549795430
Accession Number: 0001085146-25-002864
Form Type: 13F-HR
CIK: 0001177719
Manager Name: Westfield Capital Management Co LP

Data Enrichment

99% identified

241 identified3 unidentified

Holdings

SEC FilingSEC DataHachi Filing

Manager:

244 positions • $20,549,795.43K total value

244 positions

Manager:

SEC FilingSEC DataHachi Filing

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ROCKET PHARMACEUTICALS, INC.

RCKT|77313F106

4820701(+2.3%)

Value:

$32.2B(-45.7%)

89bio, Inc.

ETNB|282559103

3894741(+0.2%)

Value:

$28.3B(-6.8%)

Astera Labs, Inc.

ALAB|04626A103

467080

Value:

$27.9B

FORMFACTOR INC

FORM|346375108

913330

Value:

$25.8B

COHERENT CORP.

COHR|19247G107

395504

Value:

$25.7B

Kinsale Capital Group, Inc.

KNSL|49714P108

51624(-58.3%)

Value:

$25.1B(-56.4%)

ONTO INNOVATION INC.

ONTO|683344105

203566(-27.3%)

Value:

$24.7B(-47.1%)

Credo Technology Group Holding Ltd

CRDO|G25457105

605805

Value:

$24.3B

BICYCLE THERAPEUTICS PLC

BCYC|088786108

2657305(+1.8%)

Value:

$22.6B(-38.3%)

Genius Sports Ltd

GENI|G3934V109

2178257(+2.3%)

Value:

$21.8B(+18.4%)

VEECO INSTRUMENTS INC

VECO|922417100

1059504(-33.0%)

Value:

$21.3B(-49.8%)

Primoris Services Corp

PRIM|74164F103

362729(+2.8%)

Value:

$20.8B(-22.8%)

GeneDx Holdings Corp.

WGS|81663L200

222477

Value:

$19.7B

EXTREME NETWORKS INC

EXTR|30226D106

1371749(-7.9%)

Value:

$18.1B(-27.2%)

SPX Technologies, Inc.

SPXC|78473E103

128615(+2.0%)

Value:

$16.6B(-9.7%)

Arista Networks, Inc.

ANET|040413205

196534

Value:

$15.2B

MARA Holdings, Inc.

MARA|565788106

1287869

Value:

$14.8B

MUELLER INDUSTRIES INC

MLI|624756102

168424(-4.5%)

Value:

$12.8B(-8.4%)

COCA COLA CO

KO|191216100

178810(-4.6%)

Value:

$12.8B(+9.8%)

URANIUM ENERGY CORP

UEC|916896103

2606954(-0.6%)

Value:

$12.5B(-28.9%)

Instrument	Shares		Other Manager	Value
Rocket Pharmaceuticals, Inc.(RCKTcusip77313F106)	4.8M	QoQ +2.25% (-106.1K) YoY +21.00% (-836.7K)	All Managers (Combined)	$32.2M	QoQ -45.74% (-$27.1M) YoY -70.04% (-$75.2M)
89bio, Inc.(ETNBcusip282559103)	3.9M	QoQ +0.20% (-7.9K) YoY +79.96% (+1.7M)	All Managers (Combined)	$28.3M	QoQ -6.84% (-$2.1M) YoY +12.40% (+$3.1M)
Astera Labs, Inc.(ALABcusip04626A103)	467.1K	QoQ NEW(+467.1K) YoY NEW(+467.1K)	All Managers (Combined)	$27.9M	QoQ NEW(+$27.9M) YoY NEW(+$27.9M)
Formfactor Inc(FORMcusip346375108)	913.3K	QoQ NEW(+913.3K) YoY NEW(+913.3K)	All Managers (Combined)	$25.8M	QoQ NEW(+$25.8M) YoY NEW(+$25.8M)
Coherent Corp.(COHRcusip19247G107)	395.5K	QoQ NEW(+395.5K) YoY -64.99% (-734.3K)	All Managers (Combined)	$25.7M	QoQ NEW(+$25.7M) YoY -62.49% (-$42.8M)
Kinsale Capital Group, Inc.(KNSLcusip49714P108)	51.6K	QoQ -58.31% (-72.2K) YoY -51.43% (-54.7K)	All Managers (Combined)	$25.1M	QoQ -56.38% (-$32.5M) YoY -54.95% (-$30.7M)
Onto Innovation Inc.(ONTOcusip683344105)	203.6K	QoQ -27.34% (-76.6K) YoY NEW(+203.6K)	All Managers (Combined)	$24.7M	QoQ -47.10% (-$22.0M) YoY NEW(+$24.7M)
Credo Technology Group Holding Ltd(CRDOcusipG25457105)	605.8K	QoQ NEW(+605.8K) YoY -28.07% (-236.4K)	All Managers (Combined)	$24.3M	QoQ NEW(+$24.3M) YoY +36.32% (-$6.5M)
Bicycle Therapeutics Plc(BCYCcusip088786108)	2.7M	QoQ +1.79% (-47.0K) YoY +155.77% (-1.6M)	All Managers (Combined)	$22.6M	QoQ -38.26% (-$14.0M) YoY -12.78% (-$3.3M)
Genius Sports Ltd(GENIcusipG3934V109)	2.2M	QoQ +2.31% (+49.3K) YoY NEW(+2.2M)	All Managers (Combined)	$21.8M	QoQ +18.40% (+$3.4M) YoY NEW(+$21.8M)
Veeco Instruments Inc(VECOcusip922417100)	1.1M	QoQ -32.95% (-520.7K) YoY NEW(+1.1M)	All Managers (Combined)	$21.3M	QoQ -49.76% (-$21.1M) YoY NEW(+$21.3M)
Primoris Services Corp(PRIMcusip74164F103)	362.7K	QoQ +2.75% (-9.7K) YoY NEW(+362.7K)	All Managers (Combined)	$20.8M	QoQ -22.78% (-$6.1M) YoY NEW(+$20.8M)
Genedx Holdings Corp.(WGScusip81663L200)	222.5K	QoQ NEW(+222.5K) YoY NEW(+222.5K)	All Managers (Combined)	$19.7M	QoQ NEW(+$19.7M) YoY NEW(+$19.7M)
Extreme Networks Inc(EXTRcusip30226D106)	1.4M	QoQ -7.94% (-118.4K) YoY NEW(+1.4M)	All Managers (Combined)	$18.1M	QoQ -27.24% (-$6.8M) YoY NEW(+$18.1M)
Spx Technologies, Inc.(SPXCcusip78473E103)	128.6K	QoQ +2.04% (-2.6K) YoY NEW(+128.6K)	All Managers (Combined)	$16.6M	QoQ -9.69% (-$1.8M) YoY NEW(+$16.6M)
Arista Networks, Inc.(ANETcusip040413205)	196.5K	QoQ NEW(+196.5K) YoY NEW(+196.5K)	All Managers (Combined)	$15.2M	QoQ NEW(+$15.2M) YoY NEW(+$15.2M)
Mara Holdings, Inc.(MARAcusip565788106)	1.3M	QoQ NEW(+1.3M) YoY NEW(+1.3M)	All Managers (Combined)	$14.8M	QoQ NEW(+$14.8M) YoY NEW(+$14.8M)
Mueller Industries Inc(MLIcusip624756102)	168.4K	QoQ -4.54% (-8.0K) YoY -0.25% (-425)	All Managers (Combined)	$12.8M	QoQ -8.42% (-$1.2M) YoY +40.82% (-$3.7M)
Coca Cola Co(KOcusip191216100)	178.8K	QoQ -4.56% (-8.6K) YoY -0.30% (-544)	All Managers (Combined)	$12.8M	QoQ +9.78% (-$1.1M) YoY +16.70% (-$1.8M)
Uranium Energy Corp(UECcusip916896103)	2.6M	QoQ -0.56% (-14.7K) YoY NEW(+2.6M)	All Managers (Combined)	$12.5M	QoQ -28.95% (-$5.1M) YoY NEW(+$12.5M)