| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Weichai America Corp. | 10%+ Owner | 3100 GOLF ROAD, ROLLING MEADOWS | /s/ Jinguang Liu (aka Jin Liu), Chief Financial Officer, Weichai America Corp. | 25 Aug 2025 | 0001702521 |
| Weichai Power Co., Ltd. | 10%+ Owner | SECTION A 197, FU SHOU EAST STREET, HIGH-TECH INDUSTRIAL DEV. ZONE, WEIFANG, SHANDONG PROVINCE, CHINA | /s/ Chenglong Sun, Authorized Representative, Weichai Power Co., Ltd. | 25 Aug 2025 | 0001703367 |
| Shandong Heavy Industry Group Co., Ltd. | 10%+ Owner | #40-1 YANZI SHAN WEST ROAD, JINAN, SHANDONG PROVINCE, CHINA | /s/ Chenglong Sun, Authorized Representative, Shandong Heavy Industry Group Co., Ltd. | 25 Aug 2025 | 0001703252 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | PSIX | Common Stock | Sale | $212,835 | -2,647 | -0.02% | $80.41 | 10,988,502 | 21 Aug 2025 | See Explanation of Responses | F1, F2, F6 |
| transaction | PSIX | Common Stock | Sale | $940,537 | -11,512 | -0.1% | $81.70 | 10,976,990 | 21 Aug 2025 | See Explanation of Responses | F1, F3, F6 |
| transaction | PSIX | Common Stock | Sale | $1,709,384 | -20,729 | -0.19% | $82.46 | 10,956,261 | 21 Aug 2025 | See Explanation of Responses | F1, F4, F6 |
| transaction | PSIX | Common Stock | Sale | $618,265 | -7,426 | -0.07% | $83.26 | 10,948,835 | 21 Aug 2025 | See Explanation of Responses | F1, F5, F6 |
| Id | Content |
|---|---|
| F1 | These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933, as amended. |
| F2 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.00 to $80.9965, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote. |
| F3 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.0056 to $81.99, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote. |
| F4 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.00 to $82.99, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote. |
| F5 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.005 to $83.64, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote. |
| F6 | This report is filed jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd. (collectively, the "Reporting Persons"). Weichai America Corp. is the direct owner of the Common Stock referenced in this report and shares the power to vote and the power to dispose of all of such shares of Common Stock with the other Reporting Persons. No individual has beneficial ownership over the Common Stock beneficially owned by the Reporting Persons. |
Exhibit List: Exhibit 24.1 - Power of Attorney (Weichai Power Co., Ltd.), incorporated by reference to Exhibit 24.1 to the Form 4 filed by Reporting Persons with the Securities and Exchange Commission on August 14, 2025 Exhibit 24.2 - Power of Attorney (Shandong Heavy Industry Group Co., Ltd.), incorporated by reference to Exhibit 24.2 to the Form 4 filed by Reporting Persons with the Securities and Exchange Commission on August 14, 2025