WESTFIELD CAPITAL MANAGEMENT CO LP

Q3 2025 13F-HR Holdings

Location
Boston, MA
Holdings as of
9/30/2025
Date filed
11/12/2025
Form type
13F-HR
Num holdings
235
Total value ($000)
$23,832,915
Net value change ($000)
-10,851 (-0.0%)
New positions
43
Sold out positions
47
Turnover %
17.7%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/12/2025 Next filing: 2/11/2026 SEC filing

Snapshot: Change Analysis

Compared to Q2 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
MRVL 219,587 NEW
FIX 185,423 36.9%
BE 141,679 NEW
FTAI 135,103 61.3%
AAPL 132,173 18.4%
SMTC 117,517 94.8%
PLTR 109,671 11447.9%
ASND 104,811 11.1%
KRMN 102,927 NEW
Merus N.V. 93,344 86.9%
Top Reduces (Value $000, Stocks/ETFs)
CRM -176,560 -100.0%
EAT -170,287 -76.4%
TDG -153,813 -34.9%
BMI -150,108 -100.0%
FN -136,030 -69.6%
TXRH -132,241 -100.0%
AXON -130,869 -20.0%
CHKP -129,637 -86.3%
AMAT -127,129 -100.0%
LNTH -122,387 -100.0%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type