FRONTIER CAPITAL MANAGEMENT CO LLC
13F filer · CIK 351173 · Boston, MA
Summary
FRONTIER CAPITAL MANAGEMENT CO LLC reported $10.73B across 300 positions in its 13F for 2026 Q2, filed Aug 14, 2026. The largest holdings are FTAI (3.0%), GVA (1.6%), ALK (1.6%). Versus 2026 Q1, leaving options aside, it opened 33 new positions, added to 96, trimmed 171 and sold out of 24.
Reported value$10.73B
Positions300
Report period2026 Q2
FiledAug 14, 2026
New positions33
Added96
Trimmed171
Sold out24
Top 25 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 3.0%Value $320.17MPrice $167.10Shares 1.18M +11.42%Since Jun 30 -38.23%
Weight 1.6%Value $176.87MPrice $115.77Shares 1.12M -5.80%Since Jun 30 -26.76%
Weight 1.6%Value $176.68MPrice $39.70Shares 3.38M +0.33%Since Jun 30 -23.95%
Weight 1.3%Value $144.50MPrice $96.82Shares 975K +243.25%Since Jun 30 -34.65%
Weight 1.3%Value $134.35MPrice $108.99Shares 1.14M +9.65%Since Jun 30 -7.80%
Weight 1.2%Value $131.77MPrice $68.07Shares 2.00M +4.56%Since Jun 30 +3.31%
Weight 1.2%Value $125.71MPrice $124.03Shares 822K +35.77%Since Jun 30 -18.91%
Weight 1.1%Value $119.07MPrice $158.85Shares 725K -9.45%Since Jun 30 -3.25%
Weight 1.0%Value $112.22MPrice $334.68Shares 334K +55.89%Since Jun 30 -0.36%
Weight 1.0%Value $112.05MPrice $485.54Shares 207K -18.16%Since Jun 30 -10.39%
Weight 1.0%Value $109.87MPrice $63.55Shares 1.41M -32.38%Since Jun 30 -18.39%
Weight 1.0%Value $103.19MPrice $175.87Shares 459K -24.90%Since Jun 30 -21.84%
Weight 1.0%Value $102.77MPrice $76.66Shares 1.19M -23.08%Since Jun 30 -11.11%
Weight 1.0%Value $102.56MPrice $176.66Shares 500K -23.38%Since Jun 30 -13.95%
Weight 1.0%Value $102.27MPrice $66.61Shares 1.37M +43.33%Since Jun 30 -10.57%
Weight 0.9%Value $97.44MPrice $18.95Shares 3.72M +49.17%Since Jun 30 -27.64%
Weight 0.9%Value $95.69MPrice $220.06Shares 378K -40.68%Since Jun 30 -13.05%
Weight 0.9%Value $95.18MPrice $78.07Shares 668K -62.65%Since Jun 30 -45.25%
Weight 0.9%Value $95.09MPrice $14.41Shares 2.85M +29.97%Since Jun 30 -56.84%
Weight 0.9%Value $94.78MPrice $133.11Shares 623K +260.85%Since Jun 30 -12.57%
Weight 0.9%Value $91.82MPrice $175.04Shares 344K +68.53%Since Jun 30 -34.45%
Weight 0.9%Value $91.46MPrice $74.09Shares 1.23M +166.69%Since Jun 30 -0.09%
Weight 0.8%Value $90.63MPrice $131.59Shares 667K +3.45%Since Jun 30 -3.22%
Weight 0.8%Value $90.00MPrice $76.55Shares 765K +27.30%Since Jun 30 -34.91%
Weight 0.8%Value $88.25MPrice $129.40Shares 1.12M +18.58%Since Jun 30 +64.23%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 3.0% | $320.17M | -38.23% | +11.42% | Add | |
| 1.6% | $176.87M | -26.76% | -5.80% | Trim | |
| 1.6% | $176.68M | -23.95% | +0.33% | Add | |
| 1.3% | $144.50M | -34.65% | +243.25% | Add | |
| 1.3% | $134.35M | -7.80% | +9.65% | Add | |
| 1.2% | $131.77M | +3.31% | +4.56% | Add | |
| 1.2% | $125.71M | -18.91% | +35.77% | Add | |
| 1.1% | $119.07M | -3.25% | -9.45% | Trim | |
| 1.0% | $112.22M | -0.36% | +55.89% | Add | |
| 1.0% | $112.05M | -10.39% | -18.16% | Trim | |
| 1.0% | $109.87M | -18.39% | -32.38% | Trim | |
| 1.0% | $103.19M | -21.84% | -24.90% | Trim | |
| 1.0% | $102.77M | -11.11% | -23.08% | Trim | |
| 1.0% | $102.56M | -13.95% | -23.38% | Trim | |
| 1.0% | $102.27M | -10.57% | +43.33% | Add | |
| 0.9% | $97.44M | -27.64% | +49.17% | Add | |
| 0.9% | $95.69M | -13.05% | -40.68% | Trim | |
| 0.9% | $95.18M | -45.25% | -62.65% | Trim | |
| 0.9% | $95.09M | -56.84% | +29.97% | Add | |
| 0.9% | $94.78M | -12.57% | +260.85% | Add | |
| 0.9% | $91.82M | -34.45% | +68.53% | Add | |
| 0.9% | $91.46M | -0.09% | +166.69% | Add | |
| 0.8% | $90.63M | -3.22% | +3.45% | Add | |
| 0.8% | $90.00M | -34.91% | +27.30% | Add | |
| 0.8% | $88.25M | +64.23% | +18.58% | Add |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.