— Know what they know.
Not Investment Advice
Asset Manager ← All Institutions

WESTFIELD CAPITAL MANAGEMENT CO LP

Q2 2026 · Filed 2026-08-12
Market Value
$30.4B
+34.8%
Holdings
312
+30
New Purchases
66
Added To
98
Closed
40
Reduced
100
Top 10 Concentration
29.4%
Turnover
34.0%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
ASND 4.21% 0.00% +4.21% $1.3B
GOOGL 4.40% 2.58% +1.82% $1.3B
SNOW 1.45% 0.48% +0.97% $442M
AMD 0.77% 0.00% +0.77% $234M
AXON 2.75% 2.00% +0.75% $836M
MU 0.87% 0.15% +0.72% $263M
CRS 0.64% 0.00% +0.64% $194M
PTCT 0.52% 0.00% +0.52% $160M
GILD 0.53% 0.02% +0.52% $163M
CAT 0.61% 0.10% +0.51% $186M
AMAT 0.49% 0.00% +0.49% $149M
NVDA 5.31% 4.88% +0.43% $1.6B
LTH 0.80% 0.38% +0.42% $245M
LRCX 0.41% 0.00% +0.41% $124M
ASML 0.38% 0.00% +0.38% $114M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
FIX 2.32% 3.79% -1.48% $704M
AMZN 0.67% 2.10% -1.43% $205M
AAPL 2.45% 3.52% -1.07% $745M
VRT 1.16% 2.13% -0.97% $353M
MSFT 1.73% 2.71% -0.97% $528M
NFLX 0.07% 0.84% -0.77% $21M
MRVL 0.01% 0.73% -0.72% $4M
BE 0.01% 0.72% -0.70% $3M
HWM 1.70% 2.34% -0.64% $517M
TPR 0.82% 1.37% -0.56% $248M
INSM 0.57% 1.06% -0.49% $174M
KTOS 0.00% 0.49% -0.49% $0
AIG 0.00% 0.49% -0.49% $0
RCL 0.13% 0.62% -0.48% $41M
FTAI 2.61% 3.09% -0.48% $795M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Mega Cap 44 $8.8B 29.0%
Large Cap 171 $16.5B 54.2%
Mid Cap 90 $5.1B 16.6%
Small Cap 6 $45M 0.1%
Micro Cap 1 $143K 0.0%

Portfolio Analytics

Avg Market Cap
$183.4B
Median Market Cap
$24.0B
Avg P/E
46.4
Median P/E
30.4
Avg Dividend Yield
0.01%
Avg Beta
1.28
# Stocks
303
# ETFs / Funds
9

Top Holdings (312 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 NVDA 5.31% 8,079,926 $1.6B $200.09 $515M +1,762,887 +27.9%
2 GOOGL 4.40% 3,749,074 $1.3B $357.37 $757M +1,722,330 +85.0%
3 ASND 4.21% 4,798,267 $1.3B $266.72 — +4,798,267 — NEW
4 AXON 2.75% 1,491,490 $836M $560.61 $384M +427,356 +40.2%
5 FTAI 2.61% 2,937,228 $795M $270.53 $97M +89,001 +3.1%
6 AAPL 2.45% 2,573,774 $745M $289.36 -$50M -559,339 -17.9%
7 FIX 2.32% 355,433 $704M $1,981.95 -$152M -265,482 -42.8%
8 AVGO 1.93% 1,556,522 $588M $377.75 $205M +319,597 +25.8%
9 MSFT 1.73% 1,414,294 $528M $373.02 -$83M -235,219 -14.3%
10 HWM 1.70% 1,921,476 $517M $268.86 -$11M -368,221 -16.1%
11 LLY 1.64% 416,732 $500M $1,199.43 $165M +52,153 +14.3%
12 SNOW 1.45% 1,736,498 $442M $254.50 $334M +1,017,688 +141.6%
13 MKSI 1.36% 928,617 $413M $444.80 $172M -118,146 -11.3%
14 META 1.25% 677,389 $382M $563.29 $80M +150,567 +28.6%
15 VRT 1.16% 1,054,361 $353M $334.82 -$129M -867,335 -45.1%
16 GEV 0.93% 241,272 $283M $1,174.86 $109M +41,966 +21.1%
17 MU 0.87% 228,203 $263M $1,154.29 $229M +127,769 +127.2%
18 V 0.86% 762,403 $262M $343.09 $124M +305,855 +67.0%
19 APG 0.86% 6,154,301 $261M $42.35 $73M +1,519,372 +32.8%
20 TPR 0.82% 1,696,569 $248M $146.38 -$62M -502,293 -22.8%
21 RYTM 0.81% 2,208,595 $245M $111.03 $77M +279,472 +14.5%
22 LTH 0.80% 5,995,254 $245M $40.84 $159M +2,809,739 +88.2%
23 TSM 0.80% 510,999 $244M $477.57 $77M +17,495 +3.5%
24 GH 0.80% 1,624,459 $244M $150.03 $118M +261,920 +19.2%
25 PWR 0.78% 331,489 $239M $720.04 $57M -327 -0.1%
26 NOW 0.77% 2,373,711 $236M $99.28 $90M +979,524 +70.3%
27 AMD 0.77% 403,081 $234M $580.91 $233M +398,061 +7929.5%
28 PANW 0.74% 658,331 $225M $341.02 $122M +21,848 +3.4%
29 WWD 0.74% 526,505 $224M $425.44 $127M +254,320 +93.4%
30 ANET 0.74% 1,317,096 $224M $169.88 $128M +536,694 +68.8%
31 LPLA 0.73% 793,061 $223M $281.68 -$42M -88,445 -10.0%
32 RKLB 0.71% 2,114,005 $215M $101.65 $11M -1,058,606 -33.4%
33 AS 0.71% 6,344,923 $215M $33.84 $85M +2,407,402 +61.1%
34 NET 0.67% 835,502 $205M $245.28 $93M +293,936 +54.3%
35 AMZN 0.67% 859,806 $205M $238.34 -$270M -1,419,848 -62.3%
36 GRMN 0.67% 861,057 $205M $237.54 $117M +484,695 +128.8%
37 RRX 0.67% 856,976 $204M $238.19 $76M +175,259 +25.7%
38 NTRA 0.65% 726,628 $197M $271.45 $46M -28,101 -3.7%
39 MS 0.65% 940,560 $197M $209.04 $115M +444,002 +89.4%
40 CRS 0.64% 314,082 $194M $616.84 — +314,082 — NEW
41 IOT 0.62% 5,836,459 $189M $32.43 $29M +763,638 +15.1%
42 DT 0.61% 4,249,229 $187M $43.91 $31M +39,635 +0.9%
43 CAT 0.61% 174,620 $186M $1,064.90 $163M +142,295 +440.2%
44 SMTC 0.60% 1,133,268 $183M $161.85 $85M -147,326 -11.5%
45 AME 0.58% 723,798 $175M $241.94 $15M -22,034 -3.0%
46 ABVX 0.57% 1,309,825 $175M $133.26 $27M -13,113 -1.0%
47 INSM 0.57% 1,629,561 $174M $106.62 -$66M +161,102 +11.0%
48 ITT 0.54% 830,382 $164M $197.76 $30M +127,073 +18.1%
49 GILD 0.53% 1,287,629 $163M $126.34 $159M +1,260,939 +4724.4%
50 PTCT 0.52% 1,956,156 $160M $81.57 — +1,956,156 — NEW
51 BROS 0.52% 2,184,001 $157M $71.81 $40M -129,356 -5.6%
52 CELH 0.51% 5,324,481 $156M $29.28 $22M +1,555,570 +41.3%
53 MTZ 0.51% 374,457 $156M $416.06 $75M +124,477 +49.8%
54 SN 0.50% 1,008,349 $154M $152.27 $58M +103,808 +11.5%
55 CSX 0.49% 3,154,419 $150M $47.53 $82M +1,496,120 +90.2%
56 FCFS 0.49% 693,085 $150M $216.32 $69M +261,092 +60.4%
57 KEY 0.49% 6,493,467 $150M $23.05 $46M +1,300,133 +25.0%
58 MCHP 0.49% 1,639,111 $149M $91.20 $87M +668,816 +68.9%
59 AMAT 0.49% 205,592 $149M $723.00 $148M +204,656 +21865.0%
60 MAR 0.49% 398,962 $148M $370.59 $98M +245,743 +160.4%
61 PCVX 0.47% 2,472,428 $144M $58.13 -$68M -1,173,710 -32.2%
62 GL 0.45% 770,990 $138M $178.68 $21M -71,433 -8.5%
63 FTI 0.45% 2,059,689 $137M $66.30 -$4M +25,934 +1.3%
64 XPO 0.42% 629,011 $129M $205.29 $18M +57,019 +10.0%
65 LEGN 0.42% 4,430,063 $128M $28.88 $24M -1,333,412 -23.1%
66 P 0.42% 1,611,958 $127M $78.79 $16M -262,805 -14.0%
67 LRCX 0.41% 285,614 $124M $433.33 — +285,614 — NEW
68 JLL 0.41% 398,453 $124M $309.95 $18M +50,674 +14.6%
69 ALAB 0.40% 249,299 $120M $483.02 $26M -610,814 -71.0%
70 ROK 0.39% 237,136 $117M $495.08 $43M +30,859 +15.0%
71 IEX 0.38% 513,564 $117M $226.95 $36M +87,545 +20.6%
72 COHR 0.38% 291,040 $115M $394.47 $20M -105,604 -26.6%
73 LGN 0.38% 1,341,963 $114M $85.23 $9M -519,690 -27.9%
74 LECO 0.38% 430,681 $114M $265.51 $25M +72,516 +20.2%
75 ASML 0.38% 57,430 $114M $1,989.44 — +57,430 — NEW
76 PL 0.37% 3,428,007 $114M $33.13 $68M +1,790,966 +109.4%
77 ONTO 0.37% 299,383 $113M $378.45 $46M -27,577 -8.4%
78 COR 0.37% 400,058 $113M $282.98 -$24M -36,851 -8.4%
79 RVMD 0.37% 600,821 $113M $187.28 -$39M -955,757 -61.4%
80 SNDK 0.37% 49,024 $111M $2,273.71 — +49,024 — NEW
81 AFRM 0.36% 1,352,200 $110M $81.55 $61M +271,564 +25.1%
82 LYV 0.36% 590,764 $108M $183.11 -$15M -219,946 -27.1%
83 NPO 0.36% 286,554 $108M $376.93 — +286,554 — NEW
84 PR 0.35% 5,756,888 $106M $18.41 -$54M -1,724,569 -23.1%
85 ARES 0.35% 952,032 $106M $111.31 -$66M -620,755 -39.5%
86 IMAX 0.35% 2,654,014 $106M $39.86 $17M +315,238 +13.5%
87 GWRE 0.34% 839,337 $103M $123.05 $31M +352,756 +72.5%
88 NXT 0.34% 857,399 $102M $119.14 -$31M -249,947 -22.6%
89 FROG 0.33% 1,114,561 $101M $90.88 — +1,114,561 — NEW
90 SNPS 0.33% 226,856 $101M $446.07 $49M +94,008 +70.8%
91 ROKU 0.33% 716,557 $99M $138.14 -$12M -461,662 -39.2%
92 PLXS 0.32% 321,808 $97M $300.67 $19M -62,685 -16.3%
93 AIT 0.32% 285,691 $97M $338.15 $20M -3,510 -1.2%
94 MSCI 0.32% 171,958 $96M $560.04 -$30M -61,806 -26.4%
95 HOOD 0.31% 955,544 $96M $100.28 $52M +322,160 +50.9%
96 ROST 0.31% 442,420 $94M $212.85 -$8M -29,496 -6.2%
97 ADPT 0.30% 4,267,645 $92M $21.45 $16M -1,169,073 -21.5%
98 XENE 0.30% 1,507,294 $91M $60.36 $9M +105,811 +7.5%
99 ORLY 0.28% 933,255 $86M $92.09 $4M +45,256 +5.1%
100 C 0.28% 608,124 $85M $139.96 $80M +563,667 +1267.9%

New Positions

SymbolValue% Port
ASND $1.3B 4.21%
CRS $194M 0.64%
PTCT $160M 0.52%
LRCX $124M 0.41%
ASML $114M 0.38%
SNDK $111M 0.37%
NPO $108M 0.36%
FROG $101M 0.33%
TTMI $78M 0.26%
FPS $77M 0.25%
RBRK $75M 0.25%
SFM $73M 0.24%
NUVL $72M 0.24%
DY $72M 0.24%
TER $66M 0.22%

Sold Out Positions

SymbolValue% Port
MCO — —%
LOW — —%
IBP — —%
WFC — —%
AIG — —%
CNR — —%
TDG — —%
KKR — —%
IONQ — —%
IBM — —%
CAH — —%
GENI — —%
MCD — —%
FICO — —%
IT — —%
View SEC EDGAR Filings for WESTFIELD CAPITAL MANAGEMENT CO LP →

Sign in to InsiderStreet

You'll also get our free weekly newsletter with
smart money signals, market insights, and alpha ideas.
Unsubscribe anytime.

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