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WESTFIELD CAPITAL MANAGEMENT CO LP

Q1 2026 · Filed 2026-05-11
Market Value
$22.6B
-0.7%
Holdings
282
+13
New Purchases
45
Added To
117
Closed
36
Reduced
75
Top 10 Concentration
29.2%
Turnover
28.7%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
FTAI 3.09% 2.04% +1.06% $698M
FIX 3.79% 2.75% +1.05% $856M
INSM 1.06% 0.33% +0.73% $240M
LNG 0.58% 0.00% +0.58% $130M
AS 0.57% 0.00% +0.57% $130M
VRT 2.13% 1.62% +0.51% $482M
AIG 0.49% 0.00% +0.49% $110M
MKSI 1.07% 0.59% +0.48% $241M
JLL 0.47% 0.00% +0.47% $106M
ROST 0.45% 0.00% +0.45% $102M
WWD 0.43% 0.00% +0.43% $97M
ANET 0.42% 0.00% +0.42% $96M
LTH 0.38% 0.00% +0.38% $86M
MS 0.36% 0.00% +0.36% $82M
MTZ 0.36% 0.00% +0.36% $80M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
MSFT 2.71% 3.45% -0.74% $611M
BAC 0.23% 0.93% -0.69% $52M
MASI 0.27% 0.87% -0.60% $61M
CVLT 0.00% 0.58% -0.58% $0
TEAM 0.00% 0.58% -0.58% $0
META 1.34% 1.90% -0.57% $301M
ADMA 0.00% 0.56% -0.56% $0
HQY 0.26% 0.79% -0.52% $60M
PODD 0.00% 0.48% -0.48% $353K
HEI-A 0.02% 0.46% -0.44% $4M
CWST 0.29% 0.72% -0.43% $65M
ALKT 0.00% 0.42% -0.42% $0
GOOGL 2.58% 3.00% -0.42% $583M
DXCM 0.01% 0.42% -0.41% $2M
ABBV 0.01% 0.42% -0.41% $2M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Mega Cap 41 $6.1B 27.1%
Large Cap 164 $12.9B 57.3%
Mid Cap 71 $3.5B 15.5%
Small Cap 4 $3M 0.0%
Micro Cap 2 $142K 0.0%

Portfolio Analytics

Avg Market Cap
$199.3B
Median Market Cap
$26.8B
Avg P/E
46.1
Median P/E
29.5
Avg Dividend Yield
0.01%
Avg Beta
1.21
# Stocks
275
# ETFs / Funds
7

Top Holdings (282 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 NVDA 4.88% 6,317,039 $1.1B $174.40 -$8M +365,990 +6.2%
2 FIX 3.79% 620,915 $856M $1,378.99 $232M -47,920 -7.2%
3 AAPL 3.52% 3,133,113 $795M $253.79 -$95M -141,205 -4.3%
4 FTAI 3.09% 2,848,227 $698M $245.00 $235M +497,602 +21.2%
5 MSFT 2.71% 1,649,513 $611M $370.17 -$173M +28,294 +1.8%
6 GOOGL 2.58% 2,026,744 $583M $287.56 -$99M -151,734 -7.0%
7 HWM 2.34% 2,289,697 $528M $230.46 $73M +70,572 +3.2%
8 VRT 2.13% 1,921,696 $482M $250.58 $113M -356,020 -15.6%
9 AMZN 2.10% 2,279,654 $475M $208.27 -$63M -51,116 -2.2%
10 AXON 2.00% 1,064,134 $452M $424.69 -$20M +232,957 +28.0%
11 AVGO 1.70% 1,236,925 $383M $309.51 -$2M +124,607 +11.2%
12 LLY 1.49% 364,579 $335M $919.77 $37M +87,030 +31.4%
13 TPR 1.37% 2,198,862 $310M $141.11 $42M +100,758 +4.8%
14 META 1.34% 526,822 $301M $572.13 -$131M -128,461 -19.6%
15 LPLA 1.17% 881,506 $265M $300.83 $42M +255,944 +40.9%
16 MKSI 1.07% 1,046,763 $241M $229.81 $106M +206,990 +24.6%
17 INSM 1.06% 1,468,459 $240M $163.52 $165M +1,035,938 +239.5%
18 PCVX 0.94% 3,646,138 $212M $58.11 $49M +106,421 +3.0%
19 RKLB 0.90% 3,172,611 $204M $64.22 $23M +580,168 +22.4%
20 NFLX 0.84% 1,969,994 $189M $96.15 $40M +372,447 +23.3%
21 APG 0.83% 4,634,929 $188M $40.52 $56M +1,181,574 +34.2%
22 PWR 0.81% 331,816 $182M $549.02 $67M +58,288 +21.3%
23 GEV 0.77% 199,306 $174M $872.90 $58M +21,372 +12.0%
24 ARES 0.76% 1,572,787 $172M $109.10 -$14M +421,587 +36.6%
25 RYTM 0.74% 1,929,123 $168M $86.97 $32M +661,965 +52.2%
26 TSM 0.74% 493,504 $167M $337.95 $31M +47,309 +10.6%
27 MRVL 0.73% 1,673,381 $166M $99.05 $224K -274,426 -14.1%
28 BE 0.72% 1,191,572 $161M $135.49 $62M +46,276 +4.0%
29 IOT 0.71% 5,072,821 $161M $31.69 $21M +1,118,851 +28.3%
30 AME 0.71% 745,832 $160M $214.36 -$25M -154,384 -17.1%
31 PR 0.71% 7,481,457 $160M $21.32 $76M +1,530,271 +25.7%
32 DT 0.69% 4,209,594 $156M $36.98 $10M +852,886 +25.4%
33 RVMD 0.67% 1,556,578 $151M $97.25 -$75M -1,288,435 -45.3%
34 NTRA 0.67% 754,729 $151M $199.99 -$13M +40,037 +5.6%
35 FN 0.66% 284,874 $149M $521.52 $62M +94,704 +49.8%
36 ABVX 0.65% 1,322,938 $147M $111.35 $11M +312,972 +31.0%
37 NOW 0.65% 1,394,187 $146M $104.55 -$80M -82,616 -5.6%
38 FTI 0.62% 2,033,755 $141M $69.13 $54M +81,328 +4.2%
39 RCL 0.62% 505,765 $139M $275.18 $14M +57,112 +12.7%
40 HLT 0.62% 457,425 $139M $304.08 $36M +99,704 +27.9%
41 V 0.61% 456,548 $138M $302.24 -$74M -147,378 -24.4%
42 COR 0.61% 436,909 $137M $314.14 $29M +117,694 +36.9%
43 ITT 0.59% 703,309 $134M $190.53 $32M +115,863 +19.7%
44 CELH 0.59% 3,768,911 $134M $35.48 $63M +2,224,696 +144.1%
45 NXT 0.59% 1,107,346 $133M $120.55 $39M +17,046 +1.6%
46 LNG 0.58% 459,044 $130M $283.76 — +459,044 — NEW
47 AS 0.57% 3,937,521 $130M $32.92 — +3,937,521 — NEW
48 RRX 0.57% 681,717 $128M $187.26 $2M -211,383 -23.7%
49 MSCI 0.56% 233,764 $126M $539.01 $7M +25,972 +12.5%
50 GH 0.56% 1,362,539 $126M $92.37 $71M +823,349 +152.7%
51 LYV 0.55% 810,710 $124M $152.51 $13M +35,476 +4.6%
52 TSLA 0.52% 316,102 $118M $371.75 -$90M -145,573 -31.5%
53 GL 0.52% 842,423 $117M $139.17 $32M +233,610 +38.4%
54 BROS 0.52% 2,313,357 $117M $50.66 $8M +533,741 +30.0%
55 NET 0.50% 541,566 $112M $206.34 $9M +22,091 +4.2%
56 ROKU 0.49% 1,178,219 $111M $94.62 -$9M +65,741 +5.9%
57 XPO 0.49% 571,992 $111M $194.55 $13M -152,222 -21.0%
58 FITB 0.49% 2,385,422 $111M $46.46 -$65M -1,361,504 -36.3%
59 P 0.49% 1,874,763 $111M $59.04 $9M +354,544 +23.3%
60 KTOS 0.49% 1,563,146 $110M $70.51 $16M +317,559 +25.5%
61 AIG 0.49% 1,458,711 $110M $75.25 — +1,458,711 — NEW
62 SNOW 0.48% 718,810 $108M $150.82 -$34M +69,705 +10.7%
63 PRIM 0.47% 743,269 $106M $143.04 -$12M -208,927 -21.9%
64 JLL 0.47% 347,779 $106M $304.32 — +347,779 — NEW
65 LGN 0.47% 1,861,653 $105M $56.46 $36M +248,327 +15.4%
66 LEGN 0.46% 5,763,475 $104M $18.09 -$30M -401,202 -6.5%
67 KEY 0.46% 5,193,334 $104M $20.05 $21M +1,153,037 +28.5%
68 ROST 0.45% 471,916 $102M $216.63 — +471,916 — NEW
69 PLMR 0.45% 854,116 $102M $119.50 -$11M +13,890 +1.6%
70 PANW 0.45% 636,483 $102M $160.32 $19M +188,023 +41.9%
71 FANG 0.44% 503,474 $100M $197.79 $46M +148,819 +42.0%
72 PLTR 0.44% 674,557 $99M $146.28 $71M +519,972 +336.4%
73 SMTC 0.44% 1,280,594 $98M $76.89 -$82M -1,168,018 -47.7%
74 WWD 0.43% 272,185 $97M $357.92 — +272,185 — NEW
75 ANET 0.42% 780,402 $96M $122.78 — +780,402 — NEW
76 AZO 0.42% 28,363 $96M $3,377.77 -$78M -22,759 -44.5%
77 SN 0.42% 904,541 $96M $105.90 $2M +64,481 +7.7%
78 COHR 0.42% 396,644 $94M $238.21 -$28M -268,479 -40.4%
79 ALAB 0.42% 860,113 $94M $109.60 $62M +664,819 +340.4%
80 BRZE 0.42% 3,973,906 $94M $23.61 $19M +1,786,631 +81.7%
81 JBL 0.41% 349,209 $93M $265.63 $18M +20,797 +6.3%
82 LECO 0.40% 358,165 $89M $249.08 $8M +20,440 +6.0%
83 IMAX 0.39% 2,338,776 $89M $38.01 $2M -7,710 -0.3%
84 WGS 0.39% 1,369,108 $88M $64.22 -$45M +350,847 +34.5%
85 GRMN 0.39% 376,362 $87M $232.01 $19M +40,618 +12.1%
86 CRDO 0.39% 926,219 $87M $93.87 $19M +455,532 +96.8%
87 FFIV 0.38% 298,542 $86M $289.33 $15M +17,243 +6.1%
88 EWBC 0.38% 805,956 $86M $106.76 -$12M -68,196 -7.8%
89 LTH 0.38% 3,185,515 $86M $26.94 — +3,185,515 — NEW
90 ORLY 0.36% 887,999 $82M $92.31 -$5M -64,703 -6.8%
91 MS 0.36% 496,558 $82M $164.57 — +496,558 — NEW
92 XENE 0.36% 1,401,483 $81M $58.15 $27M +174,712 +14.2%
93 ALNY 0.36% 245,539 $81M $330.87 $44M +152,095 +162.8%
94 FCFS 0.36% 431,993 $81M $188.00 -$4M -105,741 -19.7%
95 IEX 0.36% 426,019 $81M $189.55 $9M +24,021 +6.0%
96 MTZ 0.36% 249,980 $80M $321.74 — +249,980 — NEW
97 HLI 0.35% 543,611 $78M $143.62 -$13M +23,609 +4.5%
98 PLXS 0.34% 384,493 $78M $202.54 $77M +379,293 +7294.1%
99 KRMN 0.34% 964,305 $77M $80.05 $16M +127,324 +15.2%
100 AIT 0.34% 289,201 $77M $265.32 $3M +3,911 +1.4%

New Positions

SymbolValue% Port
LNG $130M 0.58%
AS $130M 0.57%
AIG $110M 0.49%
JLL $106M 0.47%
ROST $102M 0.45%
WWD $97M 0.43%
ANET $96M 0.42%
LTH $86M 0.38%
MS $82M 0.36%
MTZ $80M 0.36%
GWRE $73M 0.32%
LOW $71M 0.32%
MCHP $63M 0.28%
IBP $55M 0.24%
GKOS $52M 0.23%

Sold Out Positions

SymbolValue% Port
ORCL — —%
TRU — —%
AJG — —%
BRK-B — —%
BURL — —%
PRI — —%
HAL — —%
BIO — —%
BLDR — —%
RYAN — —%
SLB — —%
OWL — —%
VMC — —%
FNB — —%
ALKT — —%
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