WESTFIELD CAPITAL MANAGEMENT CO LP

Q4 2025 13F-HR Holdings

Location
Boston, MA
Holdings as of
12/31/2025
Date filed
2/11/2026
Form type
13F-HR
Num holdings
241
Total value ($000)
$24,005,012
Net value change ($000)
+172,097 (0.7%)
New positions
39
Sold out positions
33
Turnover %
12.1%
Sector allocation + QoQ delta (equities-only)
Prev filing: 11/12/2025 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q3 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)
ABVX 136,199 NEW
GOOGL 136,190 25.0%
APG 132,125 NEW
AME 117,395 174.1%
RVMD 109,203 93.0%
BROS 108,948 NEW
FTAI 107,269 30.2%
FITB 103,225 143.0%
MKSI 94,173 235.3%
ABBV 94,080 5124.2%
Top Reduces (Value $000, Stocks/ETFs)
TDG -265,658 -92.5%
Merus N.V. -200,774 -100.0%
MNDY -132,230 -98.5%
META -131,206 -23.3%
RBLX -127,371 -77.3%
NFLX -126,743 -45.8%
IP -108,638 -100.0%
NVDA -104,236 -8.6%
GKOS -100,440 -100.0%
MSFT -99,173 -11.2%
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