As of September 29, 2026, the three largest insider holders of OSRH are Kuk Hyoun Hwang (President And Ceo, 24.32Mn shares), Global Life Science Investors Llc Bellevue (TenPercentOwner, 2.04Mn shares), David Jin Yoo (Chief Financial Officer, 20.00K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Kuk Hyoun Hwang | President And Ceo | 0 | 24,317,738 | 24,317,738 | 91.8% | 19 Feb, 2025 |
| 2 | Global Life Science Investors Llc Bellevue | TenPercentOwner | 2,043,500 | 0 | 2,043,500 | 7.7% | 19 Feb, 2025 |
| 3 | In Chul Chung | Director | 20,000 | 0 | 20,000 | 0.1% | 16 Feb, 2023 |
| 4 | Steven Reed | Director | 20,000 | 0 | 20,000 | 0.1% | 16 Feb, 2023 |
| 5 | Jin Whan Park | Director | 20,000 | 0 | 20,000 | 0.1% | 16 Feb, 2023 |
| 6 | Rad Roberts | Director | 20,000 | 0 | 20,000 | 0.1% | 16 Feb, 2023 |
| 7 | Hosun Euh | Director | 20,000 | 0 | 20,000 | 0.1% | 16 Feb, 2023 |
| 8 | David Jin Yoo | Chief Financial Officer | 20,000 | 0 | 20,000 | 0.1% | 27 Mar, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 14 Feb, 2025 | Kuk Hyoun Hwang | President And Ceo | Acquired J | 43,000 | $0.00 | $0 | 2,043,500 | Indirect |
| 14 Feb, 2025 | Global Life Science Investors Llc Bellevue | TenPercentOwner | Acquired J | 43,000 | $0.00 | $0 | 2,043,500 | Direct |
| 14 Feb, 2025 | Kuk Hyoun Hwang | President And Ceo | Acquired J | 7,531,634 | $0.00 | $0 | 9,575,134 | Indirect |
| 14 Feb, 2025 | Kuk Hyoun Hwang | President And Ceo | Acquired J | 3,123,970 | $0.00 | $0 | 12,699,104 | Indirect |
| 23 Mar, 2023 | David Jin Yoo | Chief Financial Officer | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 23 Mar, 2023 | Kuk Hyoun Hwang | Chief Executive Officer | Disposed J | 20,000 | $0.00 | $0 | 2,000,500 | Indirect |
| 23 Mar, 2023 | Global Life Science Investors Llc Bellevue | TenPercentOwner | Disposed J | 20,000 | $0.00 | $0 | 2,000,500 | Direct |
| 23 Mar, 2023 | Kuk Hyoun Hwang | Chief Executive Officer | Disposed J | 20,000 | $0.00 | $0 | 370,000 | Indirect |
| 23 Mar, 2023 | David Jin Yoo | Chief Financial Officer | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 23 Mar, 2023 | Global Life Science Investors Llc Bellevue | TenPercentOwner | Disposed J | 20,000 | $0.00 | $0 | 370,000 | Direct |
| 21 Feb, 2023 | Global Life Science Investors Llc Bellevue | TenPercentOwner | Acquired J | 225,000 | $0.00 | $0 | 2,025,000 | Direct |
| 21 Feb, 2023 | Kuk Hyoun Hwang | Chief Executive Officer | Acquired J | 225,000 | $0.00 | $0 | 2,025,000 | Indirect |
| 21 Feb, 2023 | Global Life Science Investors Llc Bellevue | TenPercentOwner | Disposed J | 4,500 | $0.00 | $0 | 2,020,500 | Direct |
| 21 Feb, 2023 | Kuk Hyoun Hwang | Chief Executive Officer | Disposed J | 4,500 | $0.00 | $0 | 2,020,500 | Indirect |
| 14 Feb, 2023 | In Chul Chung | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 14 Feb, 2023 | Hosun Euh | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 14 Feb, 2023 | Steven Reed | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 14 Feb, 2023 | Rad Roberts | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 14 Feb, 2023 | Jin Whan Park | Director | Acquired A | 20,000 | $0.00 | $0 | 20,000 | Direct |
| 14 Feb, 2023 | Kuk Hyoun Hwang | Chief Executive Officer | Disposed J | 20,000 | $0.00 | $0 | 1,705,000 | Indirect |