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WESTFIELD CAPITAL MANAGEMENT CO LP

Q1 2026 · Filed 2026-05-11
Market Value
$21.7B
-2.7%
Holdings
278
+9
New Purchases
41
Added To
116
Closed
36
Reduced
76
Top 10 Concentration
28.9%
Turnover
27.7%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
FIX 3.94% 2.80% +1.15% $856M
INSM 1.11% 0.34% +0.77% $240M
LNG 0.60% 0.00% +0.60% $130M
VRT 2.22% 1.65% +0.56% $482M
MKSI 1.11% 0.60% +0.51% $241M
AIG 0.51% 0.00% +0.51% $110M
JLL 0.49% 0.00% +0.49% $106M
ROST 0.47% 0.00% +0.47% $102M
WWD 0.45% 0.00% +0.45% $97M
ANET 0.44% 0.00% +0.44% $96M
LTH 0.40% 0.00% +0.40% $86M
HWM 2.43% 2.04% +0.39% $528M
MS 0.38% 0.00% +0.38% $82M
MTZ 0.37% 0.00% +0.37% $80M
PR 0.73% 0.37% +0.36% $160M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
BAC 0.24% 0.94% -0.70% $52M
MSFT 2.81% 3.51% -0.70% $611M
MASI 0.28% 0.89% -0.61% $61M
CVLT 0.00% 0.59% -0.59% $0
TEAM 0.00% 0.59% -0.59% $0
ADMA 0.00% 0.57% -0.57% $0
META 1.39% 1.94% -0.55% $301M
HQY 0.27% 0.80% -0.53% $60M
PODD 0.00% 0.49% -0.49% $353K
HEI-A 0.02% 0.47% -0.45% $4M
CWST 0.30% 0.73% -0.43% $65M
ALKT 0.00% 0.43% -0.43% $0
DXCM 0.01% 0.43% -0.42% $2M
ABBV 0.01% 0.43% -0.42% $2M
ORCL 0.00% 0.41% -0.41% $0

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Mega Cap 38 $5.8B 26.5%
Large Cap 175 $12.9B 59.5%
Mid Cap 57 $2.9B 13.4%
Small Cap 7 $121M 0.6%
Micro Cap 1 $142K 0.0%

Portfolio Analytics

Avg Market Cap
$195.6B
Median Market Cap
$29.0B
Avg P/E
50.7
Median P/E
32.3
Avg Dividend Yield
0.01%
Avg Beta
1.21
# Stocks
271
# ETFs / Funds
7

Top Holdings (278 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 NVDA 5.07% 6,317,039 $1.1B $174.40 -$8M +365,990 +6.2%
2 FIX 3.94% 620,915 $856M $1,378.99 $232M -47,920 -7.2%
3 AAPL 3.66% 3,133,113 $795M $253.79 -$95M -141,205 -4.3%
4 MSFT 2.81% 1,649,513 $611M $370.17 -$173M +28,294 +1.8%
5 GOOGL 2.68% 2,026,744 $583M $287.56 -$99M -151,734 -7.0%
6 HWM 2.43% 2,289,697 $528M $230.46 $73M +70,572 +3.2%
7 VRT 2.22% 1,921,696 $482M $250.58 $113M -356,020 -15.6%
8 AMZN 2.19% 2,279,654 $475M $208.27 -$63M -51,116 -2.2%
9 AXON 2.08% 1,064,134 $452M $424.69 -$20M +232,957 +28.0%
10 AVGO 1.76% 1,236,925 $383M $309.51 -$2M +124,607 +11.2%
11 LLY 1.54% 364,579 $335M $919.77 $37M +87,030 +31.4%
12 TPR 1.43% 2,198,862 $310M $141.11 $42M +100,758 +4.8%
13 META 1.39% 526,822 $301M $572.13 -$131M -128,461 -19.6%
14 LPLA 1.22% 881,506 $265M $300.83 $42M +255,944 +40.9%
15 MKSI 1.11% 1,046,763 $241M $229.81 $106M +206,990 +24.6%
16 INSM 1.11% 1,468,459 $240M $163.52 $165M +1,035,938 +239.5%
17 PCVX 0.98% 3,646,138 $212M $58.11 $49M +106,421 +3.0%
18 RKLB 0.94% 3,172,611 $204M $64.22 $23M +580,168 +22.4%
19 NFLX 0.87% 1,969,994 $189M $96.15 $40M +372,447 +23.3%
20 APG 0.87% 4,634,929 $188M $40.52 $56M +1,181,574 +34.2%
21 PWR 0.84% 331,816 $182M $549.02 $67M +58,288 +21.3%
22 GEV 0.80% 199,306 $174M $872.90 $58M +21,372 +12.0%
23 ARES 0.79% 1,572,787 $172M $109.10 -$14M +421,587 +36.6%
24 RYTM 0.77% 1,929,123 $168M $86.97 $32M +661,965 +52.2%
25 TSM 0.77% 493,504 $167M $337.95 $31M +47,309 +10.6%
26 MRVL 0.76% 1,673,381 $166M $99.05 $224K -274,426 -14.1%
27 BE 0.74% 1,191,572 $161M $135.49 $62M +46,276 +4.0%
28 IOT 0.74% 5,072,821 $161M $31.69 $21M +1,118,851 +28.3%
29 AME 0.74% 745,832 $160M $214.36 -$25M -154,384 -17.1%
30 PR 0.73% 7,481,457 $160M $21.32 $76M +1,530,271 +25.7%
31 DT 0.72% 4,209,594 $156M $36.98 $10M +852,886 +25.4%
32 RVMD 0.70% 1,556,578 $151M $97.25 -$75M -1,288,435 -45.3%
33 NTRA 0.70% 754,729 $151M $199.99 -$13M +40,037 +5.6%
34 FN 0.68% 284,874 $149M $521.52 $62M +94,704 +49.8%
35 ABVX 0.68% 1,322,938 $147M $111.35 $11M +312,972 +31.0%
36 NOW 0.67% 1,394,187 $146M $104.55 -$80M -82,616 -5.6%
37 FTI 0.65% 2,033,755 $141M $69.13 $54M +81,328 +4.2%
38 RCL 0.64% 505,765 $139M $275.18 $14M +57,112 +12.7%
39 HLT 0.64% 457,425 $139M $304.08 $36M +99,704 +27.9%
40 V 0.64% 456,548 $138M $302.24 -$74M -147,378 -24.4%
41 ABC 0.63% 436,909 $137M $314.14 $29M +117,694 +36.9%
42 ITT 0.62% 703,309 $134M $190.53 $32M +115,863 +19.7%
43 CELH 0.62% 3,768,911 $134M $35.48 $63M +2,224,696 +144.1%
44 NXT 0.61% 1,107,346 $133M $120.55 $39M +17,046 +1.6%
45 LNG 0.60% 459,044 $130M $283.76 +459,044 NEW
46 RRX 0.59% 681,717 $128M $187.26 $2M -211,383 -23.7%
47 MSCI 0.58% 233,764 $126M $539.01 $7M +25,972 +12.5%
48 GH 0.58% 1,362,539 $126M $92.37 $71M +823,349 +152.7%
49 LYV 0.57% 810,710 $124M $152.51 $13M +35,476 +4.6%
50 TSLA 0.54% 316,102 $118M $371.75 -$90M -145,573 -31.5%
51 GL 0.54% 842,423 $117M $139.17 $32M +233,610 +38.4%
52 BROS 0.54% 2,313,357 $117M $50.66 $8M +533,741 +30.0%
53 NET 0.51% 541,566 $112M $206.34 $9M +22,091 +4.2%
54 ROKU 0.51% 1,178,219 $111M $94.62 -$9M +65,741 +5.9%
55 XPO 0.51% 571,992 $111M $194.55 $13M -152,222 -21.0%
56 FITB 0.51% 2,385,422 $111M $46.46 -$65M -1,361,504 -36.3%
57 P 0.51% 1,874,763 $111M $59.04 $9M +354,544 +23.3%
58 KTOS 0.51% 1,563,146 $110M $70.51 $16M +317,559 +25.5%
59 AIG 0.51% 1,458,711 $110M $75.25 +1,458,711 NEW
60 SNOW 0.50% 718,810 $108M $150.82 -$34M +69,705 +10.7%
61 PRIM 0.49% 743,269 $106M $143.04 -$12M -208,927 -21.9%
62 JLL 0.49% 347,779 $106M $304.32 +347,779 NEW
63 LGN 0.48% 1,861,653 $105M $56.46 $36M +248,327 +15.4%
64 LEGN 0.48% 5,763,475 $104M $18.09 -$30M -401,202 -6.5%
65 KEY 0.48% 5,193,334 $104M $20.05 $21M +1,153,037 +28.5%
66 ROST 0.47% 471,916 $102M $216.63 +471,916 NEW
67 PLMR 0.47% 854,116 $102M $119.50 -$11M +13,890 +1.6%
68 PANW 0.47% 636,483 $102M $160.32 $19M +188,023 +41.9%
69 FANG 0.46% 503,474 $100M $197.79 $46M +148,819 +42.0%
70 PLTR 0.45% 674,557 $99M $146.28 $71M +519,972 +336.4%
71 SMTC 0.45% 1,280,594 $98M $76.89 -$82M -1,168,018 -47.7%
72 WWD 0.45% 272,185 $97M $357.92 +272,185 NEW
73 ANET 0.44% 780,402 $96M $122.78 +780,402 NEW
74 AZO 0.44% 28,363 $96M $3,377.77 -$78M -22,759 -44.5%
75 SN 0.44% 904,541 $96M $105.90 $2M +64,481 +7.7%
76 COHR 0.44% 396,644 $94M $238.21 -$28M -268,479 -40.4%
77 ALAB 0.43% 860,113 $94M $109.60 $62M +664,819 +340.4%
78 BRZE 0.43% 3,973,906 $94M $23.61 $19M +1,786,631 +81.7%
79 JBL 0.43% 349,209 $93M $265.63 $18M +20,797 +6.3%
80 LECO 0.41% 358,165 $89M $249.08 $8M +20,440 +6.0%
81 IMAX 0.41% 2,338,776 $89M $38.01 $2M -7,710 -0.3%
82 WGS 0.40% 1,369,108 $88M $64.22 -$45M +350,847 +34.5%
83 GRMN 0.40% 376,362 $87M $232.01 $19M +40,618 +12.1%
84 CRDO 0.40% 926,219 $87M $93.87 $19M +455,532 +96.8%
85 FFIV 0.40% 298,542 $86M $289.33 $15M +17,243 +6.1%
86 EWBC 0.40% 805,956 $86M $106.76 -$12M -68,196 -7.8%
87 LTH 0.40% 3,185,515 $86M $26.94 +3,185,515 NEW
88 ORLY 0.38% 887,999 $82M $92.31 -$5M -64,703 -6.8%
89 MS 0.38% 496,558 $82M $164.57 +496,558 NEW
90 XENE 0.38% 1,401,483 $81M $58.15 $27M +174,712 +14.2%
91 ALNY 0.37% 245,539 $81M $330.87 $44M +152,095 +162.8%
92 FCFS 0.37% 431,993 $81M $188.00 -$4M -105,741 -19.7%
93 IEX 0.37% 426,019 $81M $189.55 $9M +24,021 +6.0%
94 MTZ 0.37% 249,980 $80M $321.74 +249,980 NEW
95 HLI 0.36% 543,611 $78M $143.62 -$13M +23,609 +4.5%
96 PLXS 0.36% 384,493 $78M $202.54 $77M +379,293 +7294.1%
97 KRMN 0.36% 964,305 $77M $80.05 $16M +127,324 +15.2%
98 AIT 0.35% 289,201 $77M $265.32 $3M +3,911 +1.4%
99 TRGP 0.35% 304,997 $76M $250.73 $40M +106,455 +53.6%
100 CALX 0.35% 1,546,101 $76M $48.99 $15M +400,809 +35.0%

New Positions

SymbolValue% Port
LNG $130M 0.60%
AIG $110M 0.51%
JLL $106M 0.49%
ROST $102M 0.47%
WWD $97M 0.45%
ANET $96M 0.44%
LTH $86M 0.40%
MS $82M 0.38%
MTZ $80M 0.37%
GWRE $73M 0.34%
LOW $71M 0.33%
MCHP $63M 0.29%
IBP $55M 0.25%
GKOS $52M 0.24%
CDE $51M 0.24%

Sold Out Positions

SymbolValue% Port
RYAN —%
BURL —%
BLDR —%
HAL —%
AJG —%
BIO —%
FNB —%
TRU —%
SLB —%
OWL —%
VMC —%
PRI —%
CHDN —%
ALKT —%
BCYC —%
View SEC EDGAR Filings for WESTFIELD CAPITAL MANAGEMENT CO LP →

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms