| Name | Relationship | Address | Signature | Signature date | CIK | 
|---|---|---|---|---|---|
| Feeney Francis J | Chief Operating Officer | 1200 5TH AVE, SUITE 1300, SEATTLE | /s/ Francis J Feeney | 2025-09-24 | 0002087473 | 
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | MCHX | Class B Common Stock | 197K | Sep 15, 2025 | Direct | ||||||
| holding | MCHX | Class B Common Stock | 40K | Sep 15, 2025 | Direct | F1 | |||||
| holding | MCHX | Class B Common Stock | 40K | Sep 15, 2025 | Direct | F2 | 
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 125K | $2.82 | Direct | |||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 13K | $5.05 | Direct | |||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 30K | $2.02 | Direct | |||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 40K | $2.56 | Direct | F3 | ||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 40K | $1.72 | Direct | F4 | ||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 300K | $1.45 | Direct | F5 | ||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 200K | $1.58 | Direct | F6 | ||||||
| holding | MCHX | Employee Stock Option (right to buy) | Sep 15, 2025 | Class B Common Stock | 100K | $1.58 | Direct | F7 | ||||||
| holding | MCHX | Restricted Stock Units | Sep 15, 2025 | Class B Common Stock | 62.5K | $0.00 | Direct | F8 | 
| Id | Content | 
|---|---|
| F1 | Restricted stock award effective on the Grant Date, which was January 3, 2022, with 25% of such shares vesting on the first, second, third, and fourth annual anniversary of the Grant Date, subject to Feeney remaining a continuous and full-time active employee. | 
| F2 | Restricted stock award effective on the Grant Date, which was January 3, 2023, with 25% of such shares vesting on the first, second, third, and fourth annual anniversary of the Grant Date, subject to Feeney remaining a continuous and full-time active employee. | 
| F3 | Stock option award effective on the Grant Date, which was January 3, 2022, with 25% of such option shares vesting on the first annual anniversary of the Grant Date and 1/12 of the remainder vesting in equal increments quarterly thereafter over the following three (3) year period, subject to Feeney remaining a continuous and full-time active employee. | 
| F4 | Stock option award effective on the Grant Date, which was January 3, 2023, with 25% of such option shares vesting on the first annual anniversary of the Grant Date and 1/12 of the remainder vesting in equal increments quarterly thereafter over the following three (3) year period, subject to Feeney remaining a continuous and full-time active employee. | 
| F5 | Stock option award effective on the Grant Date, which was September 28, 2023, with 25% of such option shares vesting on the first annual anniversary of the Grant Date and 1/12 of the remainder vesting in equal increments quarterly thereafter over the following three (3) year period, subject to Feeney remaining a continuous and full-time active employee. | 
| F6 | Stock option award effective on the Grant Date, which was July 26, 2024, with 25% of such option shares vesting on the first annual anniversary of the Grant Date and 1/12 of the remainder vesting in equal increments quarterly thereafter over the following three (3) year period, subject to Feeney remaining a continuous and full-time active employee. | 
| F7 | Stock option award effective on the Grant Date, which was July 26, 2024, with such option shares vesting in full on the fourth annual anniversary of the Grant Date, subject to Feeney remaining a continuous and full-time active employee. | 
| F8 | Restricted stock units award effective on the Grant Date, which was March 20, 2025. Each restricted stock unit represents the right to receive one share of the Company's Class B Common Stock upon vesting, which occurs in full on the first anniversary of the Grant Date, subject to Feeney remaining a continuous and full-time active employee. | 
Exhibit List: Exhibit 24 (Power of Attorney)