Harbor Capital Advisors, Inc. reported 1,396 positions worth $1.29B for the quarter ended Sep 30, 2026, up 1.0% on the prior quarter. It opened 308 new positions, added to 663, trimmed 414 and exited 66. Its largest holding is Microsoft Corp at 2.3% 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 | Change % | Trade Value | Weight |
|---|---|---|---|---|
| GFL GFL Environmental Inc. | +71.2K | +423.5% | $2.98M | 0.284% |
| ATRC AtriCure, Inc. | +48.4K | +114.1% | $2.72M | 0.394% |
| APTV Aptiv PLC | +63.0K | +1,925.8% | $2.71M | 0.22% |
| FTAI FTAI Aviation Ltd. | +15.6K | +201.5% | $2.61M | 0.301% |
| IBP Installed Building Products, Inc. | +13.4K | +9,388.1% | $2.58M | 0.201% |
| CTRI Centuri Holdings, Inc. | +124.9K | – | $2.50M | 0.193% |
| GOOGL Alphabet Inc. | +6,239 | +8.5% | $2.15M | 2.13% |
| ALGM Allegro Microsystems, Inc. | +58.9K | – | $2.14M | 0.165% |
| AMZN Amazon Com Inc | +8,043 | +7.2% | $2.00M | 2.31% |
| JOE ST JOE Co | +30.4K | +80.6% | $2.00M | 0.346% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| ACA Arcosa, Inc. | -43.5K | -99.3% | $6.38M | <0.01% |
| TWST Twist Bioscience Corp | -23.4K | -43.8% | $4.51M | 0.447% |
| POWL Powell Industries Inc | -8,857 | -100.0% | $2.54M | Exited |
| MGNI Magnite, Inc. | -99.3K | -31.8% | $2.51M | 0.416% |
| FFIV F5, Inc. | -5,320 | -95.0% | $2.38M | <0.01% |
| ATEX Anterix Inc. | -20.8K | -100.0% | $2.14M | Exited |
| STGW Stagwell Inc | -261.8K | -38.1% | $2.13M | 0.267% |
| AHCO AdaptHealth Corp. | -202.0K | -100.0% | $2.11M | Exited |
| VSAT Viasat Inc | -30.1K | -99.3% | $2.07M | <0.01% |
| SLAB Silicon Laboratories Inc. | -8,754 | -99.5% | $2.01M | <0.01% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| CTRI Centuri Holdings, Inc. | +124.9K | $2.50M | 0.193% |
| ALGM Allegro Microsystems, Inc. | +58.9K | $2.14M | 0.165% |
| WULF Terawulf Inc. | +126.8K | $1.88M | 0.145% |
| AMD Advanced Micro Devices Inc | +2,899 | $1.77M | 0.137% |
| COCO Vita Coco Company, Inc. | +30.5K | $1.74M | 0.135% |
| AVGO Broadcom Inc. | +4,452 | $1.56M | 0.121% |
| MMED MiniMed Group, Inc. | +74.2K | $1.45M | 0.112% |
| TSM Taiwan Semiconductor Manufacturing Co Ltd | +2,786 | $1.27M | 0.098% |
| EXP Eagle Materials Inc | +6,075 | $1.04M | 0.08% |
| HUT Hut 8 Corp. | +11.9K | $1.03M | 0.079% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| POWL Powell Industries Inc | -8,857 | $2.54M | 0.198% |
| ATEX Anterix Inc. | -20.8K | $2.14M | 0.167% |
| AHCO AdaptHealth Corp. | -202.0K | $2.11M | 0.164% |
| TKR Timken Co | -13.7K | $2.00M | 0.156% |
| ACI Albertsons Companies, Inc. | -130.7K | $1.77M | 0.138% |
| BL Blackline, Inc. | -50.1K | $1.41M | 0.11% |
| OKE Oneok Inc | -15.5K | $1.34M | 0.105% |
| MEC Mayville Engineering Company, Inc. | -28.6K | $1.07M | 0.084% |
| DTM DT Midstream, Inc. | -6,991 | $1.03M | 0.08% |
| PENN PENN Entertainment, Inc. | -46.5K | $993.00K | 0.077% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | MSFT Microsoft Corp | Technology | 59.2K | $30.38M | 2.35% | +3,722 | +6.7% | Added | 0% |
| 2 | AMZN Amazon Com Inc | Consumer Discretionary | 120.1K | $29.92M | 2.31% | +8,043 | +7.2% | Added | 0% |
| 3 | NVDA Nvidia Corp | Technology | 128.2K | $29.29M | 2.26% | +5,992 | +4.9% | Added | 0% |
| 4 | AAPL Apple Inc. | Technology | 87.9K | $29.28M | 2.26% | +351 | +0.4% | Added | 0% |
| 5 | GOOGL Alphabet Inc. | Technology | 80.0K | $27.52M | 2.13% | +6,239 | +8.5% | Added | 0% |
| 6 | META Meta Platforms, Inc. | Technology | 35.7K | $25.91M | 2% | +906 | +2.6% | Added | 0% |
| 7 | JPM Jpmorgan Chase & Co | Financial Services | 45.2K | $14.94M | 1.15% | +158 | +0.4% | Added | 0% |
| 8 | CSCO Cisco Systems, Inc. | Technology | 138.7K | $14.93M | 1.15% | +436 | +0.3% | Added | 0% |
| 9 | LLY ELI LILLY & Co | Healthcare | 10.3K | $11.94M | 0.922% | +44 | +0.4% | Added | 0% |
| 10 | SIMO Silicon Motion Technology CORP | Technology | 42.4K | $11.88M | 0.918% | -559 | -1.3% | Reduced | 0.13% |
| 11 | NFLX Netflix Inc | Technology | 154.9K | $10.78M | 0.832% | +658 | +0.4% | Added | 0% |
| 12 | CVX Chevron Corp | Energy | 52.6K | $10.75M | 0.83% | +3,028 | +6.1% | Added | 0% |
| 13 | CRM Salesforce, Inc. | Technology | 37.9K | $8.69M | 0.671% | +2,449 | +6.9% | Added | 0% |
| 14 | KLAC Kla Corp | Technology | 44.2K | $8.62M | 0.666% | +188 | +0.4% | Added | 0% |
| 15 | MRVL Marvell Technology, Inc. | Technology | 32.5K | $8.59M | 0.663% | +2,984 | +10.1% | Added | 0% |
Tip. Select a row to see that position’s full history at Harbor Capital Advisors.
As of its Q3 2026 13F filing, Harbor Capital Advisors, Inc.’s five largest positions were Microsoft Corp (MSFT) at 2.3%, Amazon Com Inc (AMZN) at 2.3%, Nvidia Corp (NVDA) at 2.3%, Apple Inc. (AAPL) at 2.3%, Alphabet Inc. (GOOGL) at 2.1% of the reported portfolio.
Harbor Capital Advisors, Inc. reported a 13F portfolio worth $1.29B across 1,396 positions for Q3 2026. That is up 1.0% from the previous quarter.
Its largest purchases by value were GFL Environmental Inc. ($2.98M), AtriCure, Inc. ($2.72M), Aptiv PLC ($2.71M). It opened 308 new positions.
Its largest sales by value were Arcosa, Inc. ($6.38M), Twist Bioscience Corp ($4.51M), Powell Industries Inc ($2.54M). It exited 66 positions entirely.
From the Form 13F-HR reports Harbor Capital Advisors, Inc. 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.