Sitime Corporation
A maker of silicon-based timing chips that replace the quartz crystals found inside nearly every electronic device, keeping clocks and signals in sync across AI data centers, phones, cars, and industrial gear. Founded in 2005 in Santa Clara by researchers Markus Lutz and Aaron Partridge, it builds its oscillators and clock chips from microscopic moving parts etched into silicon, outsourcing manufacturing to foundries like Bosch and TSMC. The name blends "silicon" with "time," and its MEMS timing technology—grown out of work on tiny silicon machines—aims to make electronics more reliable than fragile quartz.
The responses to Item 3 and Item 6 of this Schedule 13D are incorporated herein by reference. The Reporting Persons acquired the securities reported herein for investment purposes. The Reporting Persons, either directly or indirectly through the Renesas CEO Director (defined in Item 6 below), may engage in discussions from time to time with the Issuer's board of directors (the "Board"), the Issuer's management, the Issuer's other stockholders, advisors, and/or other persons regarding the Issuer, including but not limited to its operations, governance, and control. The Reporting Persons expect to review from time to time their investment in the Issuer and may, depending on the market and other conditions and subject to applicable law, (i) acquire beneficial ownership of additional Shares in the open market, in privately negotiated transactions, or otherwise, (ii) dispose of all or a part of their holdings of securities of the Issuer, or (iii) take other actions which could involve one or more of the types of transactions or have one or more of the results described in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. Except as set forth herein, the Reporting Persons do not have any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. The Reporting Persons may, at any time and from time to time, review or reconsider their position and/or change their purpose and/or formulate plans or proposals with respect thereto.
The responses to Item 3 and Item 6 of this Schedule 13D are incorporated herein by reference. The Reporting Persons acquired the securities reported herein for investment purposes. The Reporting Persons, either directly or indirectly through the Renesas CEO Director (defined in Item 6 below), may engage in discussions from time to time with the Issuer's board of directors (the "Board"), the Issuer's management, the Issuer's other stockholders, advisors, and/or other persons regarding the Issuer, including but not limited to its operations, governance, and control. The Reporting Persons expect to review from time to time their investment in the Issuer and may, depending on the market and other conditions and subject to applicable law, (i) acquire beneficial ownership of additional Shares in the open market, in privately negotiated transactions, or otherwise, (ii) dispose of all or a part of their holdings of securities of the Issuer, or (iii) take other actions which could involve one or more of the types of transactions or have one or more of the results described in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. Except as set forth herein, the Reporting Persons do not have any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. The Reporting Persons may, at any time and from time to time, review or reconsider their position and/or change their purpose and/or formulate plans or proposals with respect thereto.
| Holder | Schedule | % of class | Shares | Filed |
|---|---|---|---|---|
| Vanguard Portfolio Management | 13G/APassive | 4.61% | 1.22M | Jul 31, 2026 |
| BlackRock, Inc. | 13G/APassive | 8.3% | 2.19M | Jul 30, 2026 |
| Renesas Electronics America Inc. | 13DActivist | 11.9% | 3.56M | Jul 9, 2026 |
The responses to Item 3 and Item 6 of this Schedule 13D are incorporated herein by reference. The Reporting Persons acquired the securities reported herein for investment purposes. The Reporting Persons, either directly or indirectly through the Renesas CEO Director (defined in Item 6 below), may engage in discussions from time to time with the Issuer's board of directors (the "Board"), the Issuer's management, the Issuer's other stockholders, advisors, and/or other persons regarding the Issuer, including but not limited to its operations, governance, and control. The Reporting Persons expect to review from time to time their investment in the Issuer and may, depending on the market and other conditions and subject to applicable law, (i) acquire beneficial ownership of additional Shares in the open market, in privately negotiated transactions, or otherwise, (ii) dispose of all or a part of their holdings of securities of the Issuer, or (iii) take other actions which could involve one or more of the types of transactions or have one or more of the results described in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. Except as set forth herein, the Reporting Persons do not have any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. The Reporting Persons may, at any time and from time to time, review or reconsider their position and/or change their purpose and/or formulate plans or proposals with respect thereto. | ||||
| Renesas Electronics Corporation | 13DActivist | 11.9% | 3.56M | Jul 9, 2026 |
The responses to Item 3 and Item 6 of this Schedule 13D are incorporated herein by reference. The Reporting Persons acquired the securities reported herein for investment purposes. The Reporting Persons, either directly or indirectly through the Renesas CEO Director (defined in Item 6 below), may engage in discussions from time to time with the Issuer's board of directors (the "Board"), the Issuer's management, the Issuer's other stockholders, advisors, and/or other persons regarding the Issuer, including but not limited to its operations, governance, and control. The Reporting Persons expect to review from time to time their investment in the Issuer and may, depending on the market and other conditions and subject to applicable law, (i) acquire beneficial ownership of additional Shares in the open market, in privately negotiated transactions, or otherwise, (ii) dispose of all or a part of their holdings of securities of the Issuer, or (iii) take other actions which could involve one or more of the types of transactions or have one or more of the results described in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. Except as set forth herein, the Reporting Persons do not have any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of the instructions to Item 4 of Schedule 13D. The Reporting Persons may, at any time and from time to time, review or reconsider their position and/or change their purpose and/or formulate plans or proposals with respect thereto. | ||||
| FMR LLC | 13G/APassive | 15% | 3.94M | May 6, 2026 |
| Abigail P. Johnson | 13G/APassive | 15% | 3.94M | May 6, 2026 |
| The Vanguard Group | 13G/APassive | 0% | 0 | Mar 27, 2026 |
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