SOXX additions & removals
Changes are observation-bounded: an addition is the first retained official snapshot containing a security after an earlier absence; a removal is its first retained absence. Baseline holdings receive no invented addition date.
Additions
| Ticker | Issuer | Observed date | Change |
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| MACOM Technology Solutions Holdings, Inc. | MACOM Technology Solutions Holdings, Inc. | 2025-09-30 | Added / first present |
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| Rambus, Inc. | Rambus, Inc. | 2025-09-30 | Added / first present |
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| Astera Labs, Inc. | Astera Labs, Inc. | 2025-09-30 | Added / first present |
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| Lam Research Corp. | Lam Research Corp. | 2024-12-31 | Added / first present |
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| Universal Display Corp. | Universal Display Corp. | 2024-09-30 | Added / first present |
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| Onto Innovation, Inc. | Onto Innovation, Inc. | 2024-09-30 | Added / first present |
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| ARM Holdings plc | ARM Holdings plc | 2024-09-30 | Added / first present |
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| Axcelis Technologies, Inc. | Axcelis Technologies, Inc. | 2023-09-30 | Added / first present |
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| Rambus, Inc. | Rambus, Inc. | 2023-09-30 | Added / first present |
|---|
| N/A | N/A | 2022-09-30 | Added / first present |
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| Silicon Laboratories, Inc. | Silicon Laboratories, Inc. | 2022-09-30 | Added / first present |
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| Synaptics Inc | Synaptics Inc | 2022-03-31 | Added / first present |
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| Wolfspeed Inc | Wolfspeed Inc | 2021-12-31 | Added / first present |
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| Lattice Semiconductor Corp | Lattice Semiconductor Corp | 2021-09-30 | Added / first present |
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| Maxim Integrated Products Inc | Maxim Integrated Products Inc | 2021-06-30 | Added / first present |
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| Universal Display Corp | Universal Display Corp | 2021-06-30 | Added / first present |
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| United Microelectronics Corp | United Microelectronics Corp | 2021-06-30 | Added / first present |
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| ASE Technology Holding Co Ltd | ASE Technology Holding Co Ltd | 2021-06-30 | Added / first present |
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| STMicroelectronics NV | STMicroelectronics NV | 2021-06-30 | Added / first present |
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| Marvell Technology Inc | Marvell Technology Inc | 2021-06-30 | Added / first present |
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| CMC Materials Inc | CMC Materials Inc | 2020-12-31 | Added / first present |
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| Inphi Corp | Inphi Corp | 2020-09-30 | Added / first present |
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| Brooks Automation Inc | Brooks Automation Inc | 2020-09-30 | Added / first present |
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| Lattice Semiconductor Corp | Lattice Semiconductor Corp | 2020-09-30 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
|---|
| Universal Display Corp. | Universal Display Corp. | 2025-09-30 | Removed / first absent |
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| Onto Innovation, Inc. | Onto Innovation, Inc. | 2025-09-30 | Removed / first absent |
|---|
| Axcelis Technologies, Inc. | Axcelis Technologies, Inc. | 2024-09-30 | Removed / first absent |
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| Rambus, Inc. | Rambus, Inc. | 2024-09-30 | Removed / first absent |
|---|
| Silicon Laboratories, Inc. | Silicon Laboratories, Inc. | 2023-09-30 | Removed / first absent |
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| Synaptics Inc | Synaptics Inc | 2023-09-30 | Removed / first absent |
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| Wolfspeed Inc | Wolfspeed Inc | 2024-09-30 | Removed / first absent |
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| Lattice Semiconductor Corp | Lattice Semiconductor Corp | 2025-09-30 | Removed / first absent |
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| Maxim Integrated Products Inc | Maxim Integrated Products Inc | 2021-09-30 | Removed / first absent |
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| Universal Display Corp | Universal Display Corp | 2022-09-30 | Removed / first absent |
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| CMC Materials Inc | CMC Materials Inc | 2021-06-30 | Removed / first absent |
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| Inphi Corp | Inphi Corp | 2021-06-30 | Removed / first absent |
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| Brooks Automation Inc | Brooks Automation Inc | 2021-06-30 | Removed / first absent |
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| Lattice Semiconductor Corp | Lattice Semiconductor Corp | 2021-06-30 | Removed / first absent |
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| Chicago Mercantile Exchange | Chicago Mercantile Exchange | 2022-09-30 | Removed / first absent |
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| Lam Research Corp | Lam Research Corp | 2024-12-31 | Removed / first absent |
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| Xilinx Inc | Xilinx Inc | 2022-03-31 | Removed / first absent |
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| Maxim Integrated Products Inc | Maxim Integrated Products Inc | 2020-09-30 | Removed / first absent |
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| Qorvo Inc | Qorvo Inc | 2025-09-30 | Removed / first absent |
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| Cree Inc | Cree Inc | 2021-12-31 | Removed / first absent |
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| Silicon Laboratories Inc | Silicon Laboratories Inc | 2021-06-30 | Removed / first absent |
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| Semtech Corp | Semtech Corp | 2020-09-30 | Removed / first absent |
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| MKS Instruments Inc | MKS Instruments Inc | 2025-09-30 | Removed / first absent |
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| Cabot Microelectronics Corp | Cabot Microelectronics Corp | 2020-12-31 | Removed / first absent |
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| Cirrus Logic Inc | Cirrus Logic Inc | 2020-09-30 | Removed / first absent |
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