YHC's three largest insider shareholders as of September 29, 2026 are David E. Lazar (President, 71 shares), Yilin Lu (President, 14 shares), Alexandra Hoffman (Director, 6 shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David E. Lazar | President | 71 | 0 | 71 | 77.0% | 07 Apr, 2025 |
| 2 | Yilin Lu | President | 14 | 0 | 14 | 15.4% | 19 Dec, 2025 |
| 3 | Alexandra Hoffman | Director | 6 | 0 | 6 | 6.8% | 02 Dec, 2024 |
| 4 | James P. O'Brien | Director | 1 | 0 | 1 | 0.7% | 02 Apr, 2025 |
| 5 | Sean Dollinger | Chief Executive Officer | 0 | 0 | 0 | 0.0% | 02 Oct, 2025 |
| 6 | Jing Lu | Director | 0 | 0 | 0 | 0.0% | 02 Oct, 2025 |
| 7 | Lijun Chen | Director | 0 | 0 | 0 | 0.0% | 02 Oct, 2025 |
| 8 | Hong Chun Yeung | Director | 0 | 0 | 0 | 0.0% | 02 Oct, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 30 Sep, 2025 | Yilin Lu | President | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 17 Dec, 2025 | Yilin Lu | President | Acquired P | 2,000,000 | $125,981.10 | $251.96Bn | 14 | Direct |
| 30 Sep, 2025 | Yilin Lu | President | Disposed M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Yilin Lu | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Lijun Chen | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Sean Dollinger | Chief Executive Officer | Acquired M | 90 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Jing Lu | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Hong Chun Yeung | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Hong Chun Yeung | Director | Disposed M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Lijun Chen | Director | Disposed M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Sean Dollinger | Chief Executive Officer | Disposed M | 90 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Yilin Lu | Director | Disposed M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Sep, 2025 | Jing Lu | Director | Disposed M | 179 | $0.00 | $0 | 0 | Direct |
| 17 Jul, 2025 | George Patrick Lambeth | TenPercentOwner | Disposed S | 180,000 | $424,850.28 | $76.47Bn | 0 | Direct |
| 30 Jun, 2025 | Sean Dollinger | Chief Executive Officer | Acquired M | 89 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2025 | Jing Lu | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2025 | Yilin Lu | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2025 | Hong Chun Yeung | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2025 | Lijun Chen | Director | Acquired M | 179 | $0.00 | $0 | 0 | Direct |
| 30 Jun, 2025 | Jing Lu | Director | Disposed M | 179 | $0.00 | $0 | 0 | Direct |