Frontier Capital Management Co LLC reported 297 positions worth $10.66B for the quarter ended Jun 30, 2026, up 12.1% on the prior quarter. It opened 33 new positions, added to 96, trimmed 168 and exited 21. Its largest holding is FTAI Aviation Ltd. at 3% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Trade Value | Weight |
|---|---|---|---|
| AAOI Applied Optoelectronics, Inc. | +691.2K +243.2% | $102.40M | 1.36% |
| DT Dynatrace, Inc. | +1.64M | $71.82M | 0.674% |
| PODD Insulet Corp | +450.0K +260.8% | $68.51M | 0.889% |
| FLS Flowserve Corp | +770.8K +166.7% | $57.17M | 0.858% |
| HUBB Hubbell Inc | +94.9K +378.7% | $49.67M | 0.589% |
| PRIM Primoris Services Corp | +468.8K | $46.46M | 0.436% |
| SARO StandardAero, Inc. | +1.45M | $43.35M | 0.407% |
| MDB MongoDB, Inc. | +119.8K +55.9% | $40.23M | 1.05% |
| SNOW Snowflake Inc. | +155.1K +217.5% | $39.48M | 0.54% |
| PGY Pagaya Technologies Ltd. | +2.10M +1,067.5% | $38.32M | 0.393% |
| Holding | Change | Trade Value | Weight |
|---|---|---|---|
| ALAB Astera Labs, Inc. | -533.6K -77.5% | $257.75M | 0.7% |
| UCTT Ultra Clean Holdings, Inc. | -1.12M -62.7% | $159.69M | 0.893% |
| DAR Darling Ingredients Inc. | -1.66M -67.7% | $90.77M | 0.407% |
| SIMO Silicon Motion Technology CORP | -269.7K -99.0% | $89.91M | <0.01% |
| COHU Cohu Inc | -1.09M -84.5% | $80.84M | 0.139% |
| ENTG Entegris Inc | -402.8K -53.4% | $72.44M | 0.594% |
| SANM Sanmina Corp | -259.3K -40.7% | $65.62M | 0.897% |
| MPWR Monolithic Power Systems, Inc. | -47.0K -58.9% | $64.94M | 0.424% |
| JAZZ Jazz Pharmaceuticals plc | -240.0K -46.4% | $57.83M | 0.627% |
| ATI Ati Inc | -274.5K -39.5% | $54.09M | 0.776% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| DT Dynatrace, Inc. | +1.64M | $71.82M | 0.674% |
| PRIM Primoris Services Corp | +468.8K | $46.46M | 0.436% |
| SARO StandardAero, Inc. | +1.45M | $43.35M | 0.407% |
| ALKS Alkermes plc. | +659.6K | $34.56M | 0.324% |
| ETOR eToro Group Ltd. | +832.0K | $32.84M | 0.308% |
| ST Sensata Technologies Holding plc | +657.8K | $31.40M | 0.295% |
| MANE Veradermics, Inc | +254.9K | $31.33M | 0.294% |
| UAMY United States Antimony Corp | +4.30M | $31.20M | 0.293% |
| MOH Molina Healthcare, Inc. | +128.5K | $29.38M | 0.276% |
| HALO Halozyme Therapeutics, Inc. | +342.6K | $26.81M | 0.251% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| MRVL Marvell Technology, Inc. | -541.0K | $53.58M | 0.563% |
| DIOD Diodes Inc | -592.5K | $40.44M | 0.425% |
| QDEL QuidelOrtho Corp | -1.75M | $28.80M | 0.303% |
| DPZ Dominos Pizza Inc | -62.7K | $22.51M | 0.237% |
| ECG Everus Construction Group, Inc. | -143.5K | $16.94M | 0.178% |
| ANET Arista Networks, Inc. | -136.9K | $16.81M | 0.177% |
| TSCO Tractor Supply Co | -362.6K | $16.42M | 0.173% |
| APH Amphenol Corp | -249.5K | $15.76M | 0.166% |
| RMD Resmed Inc | -65.2K | $14.64M | 0.154% |
| CZR Caesars Entertainment, Inc. | -503.4K | $13.30M | 0.14% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | FTAI FTAI Aviation Ltd. | Industrials | 1.18M | $320.17M | 3% | +121.3K | +11.4% | Added | 1.15% |
| 2 | GVA Granite Construction Inc | Industrials | 1.12M | $176.87M | 1.66% | -68.9K | -5.8% | Reduced | 2.56% |
| 3 | ALK Alaska Air Group, Inc. | Industrials | 3.38M | $176.68M | 1.66% | +11.1K | +0.3% | Added | 3.03% |
| 4 | AAOI Applied Optoelectronics, Inc. | Technology | 975.3K | $144.50M | 1.36% | +691.2K | +243.2% | Added | 1.16% |
| 5 | AKAM Akamai Technologies Inc | Technology | 1.14M | $134.35M | 1.26% | +100.0K | +9.6% | Added | 0.79% |
| 6 | ASH Ashland Inc. | Basic Materials | 2.00M | $131.77M | 1.24% | +87.2K | +4.6% | Added | 4.35% |
| 7 | LSCC Lattice Semiconductor Corp | Technology | 821.8K | $125.71M | 1.18% | +216.5K | +35.8% | Added | 0.6% |
| 8 | BPOP Popular, Inc. | Financial Services | 725.2K | $119.07M | 1.12% | -75.7K | -9.5% | Reduced | 1.14% |
| 9 | MDB MongoDB, Inc. | Technology | 334.1K | $112.22M | 1.05% | +119.8K | +55.9% | Added | 0.42% |
| 10 | UTHR UNITED THERAPEUTICS Corp | Healthcare | 206.8K | $112.05M | 1.05% | -45.9K | -18.2% | Reduced | 0.48% |
| 11 | KNX Knight-Swift Transportation Holdings Inc. | Industrials | 1.41M | $109.87M | 1.03% | -675.6K | -32.4% | Reduced | 0.87% |
| 12 | EXP Eagle Materials Inc | Basic Materials | 458.6K | $103.19M | 0.968% | -152.0K | -24.9% | Reduced | 1.48% |
| 13 | LRN Stride, Inc. | Consumer Discretionary | 1.19M | $102.77M | 0.964% | -357.6K | -23.1% | Reduced | 2.79% |
| 14 | XPO XPO, Inc. | Industrials | 499.6K | $102.56M | 0.962% | -152.5K | -23.4% | Reduced | 0.43% |
| 15 | BBIO BridgeBio Pharma, Inc. | Healthcare | 1.37M | $102.27M | 0.959% | +415.1K | +43.3% | Added | 0.7% |
Tip. Select a row to see that position’s full history at Frontier Capital Management.
As of its Q2 2026 13F filing, Frontier Capital Management Co LLC’s five largest positions were FTAI Aviation Ltd. (FTAI) at 3.0%, Granite Construction Inc (GVA) at 1.7%, Alaska Air Group, Inc. (ALK) at 1.7%, Applied Optoelectronics, Inc. (AAOI) at 1.4%, Akamai Technologies Inc (AKAM) at 1.3% of the reported portfolio.
Frontier Capital Management Co LLC reported a 13F portfolio worth $10.66B across 297 positions for Q2 2026. That is up 12.1% from the previous quarter.
Its largest purchases by value were Applied Optoelectronics, Inc. ($102.40M), Dynatrace, Inc. ($71.82M), Insulet Corp ($68.51M). It opened 33 new positions.
Its largest sales by value were Astera Labs, Inc. ($257.75M), Ultra Clean Holdings, Inc. ($159.69M), Darling Ingredients Inc. ($90.77M). It exited 21 positions entirely.
From the Form 13F-HR reports Frontier Capital Management Co LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.