FRONTIER CAPITAL MANAGEMENT CO LLC

Q2 2026 13F-HR Holdings

Location
Boston, MA
Holdings as of
6/30/2026
Date filed
8/14/2026
Form type
13F-HR
Num holdings
300
Total value ($000)
$10,728,146
Net value change ($000)
+998,673 (10.3%)
New positions
33
Sold out positions
24
Turnover %
9.8%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/15/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 2026
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)
AAOI 120,467 501.2%
DT 71,819 NEW
LSCC 69,561 123.9%
FTAI 59,929 23.0%
MDB 59,766 113.9%
PODD 58,577 161.8%
FLS 57,466 169.0%
ALK 52,597 42.4%
HUBB 50,481 410.3%
RARE 49,188 107.2%
Top Reduces (Value $000, Stocks/ETFs)
DAR -108,522 -71.5%
CRCL -84,779 -57.4%
MRVL -53,584 -100.0%
SILA -52,401 -82.1%
APGE -49,283 -55.0%
AMTM -42,924 -33.4%
MPWR -41,904 -48.1%
NUVL -40,524 -100.0%
BURL -40,508 -57.5%
DIOD -40,444 -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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Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type