| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| FRIEDBERG DANIEL M. | Director, 10%+ Owner | C/O HAMPSTEAD PARK CAPITAL MANAGEMENT, 6 LIGHTHOUSE LANE, OLD GREENWICH | /s/ Daniel Friedberg | 2025-08-21 | 0001448795 |
| Hampstead Park Capital Management, LLC | 10%+ Owner | 6 LIGHTHOUSE LANE, OLD GREENWICH | Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer | 2025-08-21 | 0001773816 |
| Hampstead Park Environmental Services Investment Fund LLC | 10%+ Owner | 6 LIGHTHOUSE LANE, OLD GREENWICH | Hampstead Park Environmental Services Investment Fund LLC; By: Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer | 2025-08-21 | 0001773840 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | QRHC | Common Stock | Purchase | $27.5K | +17.2K | +0.61% | $1.60 | 2.84M | Aug 20, 2025 | By: Hampstead Park Environmental Services Investment Fund LLC | F1, F2 |
| holding | QRHC | Common Stock | 40.6K | Aug 20, 2025 | Direct | F3 | |||||
| holding | QRHC | Common Stock | 39.6K | Aug 20, 2025 | Direct | F4 |
| Id | Content |
|---|---|
| F1 | The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.57 to $1.60, inclusive. The Reporting Persons undertake to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, further information regarding the number of shares purchased at each separate price such shares were purchased. |
| F2 | This Form 4 is filed jointly by Hampstead Park Environmental Services Investment Fund LLC ("Hampstead Park Environmental"), Daniel Friedberg and Hampstead Park Capital Management, LLC ("Hampstead Park Capital"). Hampstead Park Capital is the sole member of Hampstead Park Environmental, and Mr. Friedberg is the Chief Executive Officer of Hampstead Park Capital; each may therefore be deemed to control Hampstead Park Environmental. In addition, Mr. Friedberg is a Director of the Issuer. |
| F3 | Includes (a) 20,000 RSUs that are scheduled to fully vest on August 13, 2026 and (b) 20,585 shares of common stock beneficially owned by Mr. Friedberg. |
| F4 | The reported securities include (a) 18,153 deferred stock units ("DSUs") granted under the Issuer's 2012 Incentive Compensation Plan and (b) 21,431 DSUs granted under the Issuer's 2024 Incentive Compensation Plan. The shares of common stock underlying such DSUs shall be issued upon Mr. Friedberg's separation from service with the Issuer. |