As of September 05, 2026, the three largest insider holders of HTCR are Sumitaka Yamamoto (Chairman, Ceo President, 10.61Mn shares), Daishin Yasui (TenPercentOwner, 2.20Mn shares), Kimio Hosaka (Chief Operating Officer, 115.43K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Sumitaka Yamamoto | Chairman, Ceo President | 10,607,159 | 0 | 10,607,159 | 80.9% | 15 Nov, 2023 |
| 2 | Daishin Yasui | TenPercentOwner | 2,201,756 | 0 | 2,201,756 | 16.8% | 02 Jun, 2025 |
| 3 | Kimio Hosaka | Chief Operating Officer | 115,434 | 0 | 115,434 | 0.9% | 02 Dec, 2024 |
| 4 | Hidekazu Miyata | Chief Technical Officer | 78,852 | 0 | 78,852 | 0.6% | 11 Feb, 2022 |
| 5 | Keisuke Kuno | Cx Division Vice President | 75,785 | 0 | 75,785 | 0.6% | 02 Dec, 2024 |
| 6 | Qizhi Gao | Chief Financial Officer | 32,531 | 0 | 32,531 | 0.2% | 02 Dec, 2024 |
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 |
|---|---|---|---|---|---|---|---|---|
| 29 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 50,000 | $0.67 | $33.44K | 2,261,756 | Direct |
| 29 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 50,000 | $0.67 | $33.44K | 2,261,756 | Direct |
| 29 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 50,000 | $0.67 | $33.44K | 2,261,756 | Direct |
| 30 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 60,000 | $0.70 | $42.00K | 2,201,756 | Direct |
| 30 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 60,000 | $0.70 | $42.00K | 2,201,756 | Direct |
| 30 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 60,000 | $0.70 | $42.00K | 2,201,756 | Direct |
| 20 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 10,000 | $0.56 | $5.60K | 2,312,625 | Direct |
| 20 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 10,000 | $0.56 | $5.60K | 2,312,625 | Direct |
| 20 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 10,000 | $0.56 | $5.60K | 2,312,625 | Direct |
| 21 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 869 | $0.61 | $530 | 2,311,756 | Direct |
| 21 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 869 | $0.61 | $530 | 2,311,756 | Direct |
| 21 May, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 869 | $0.61 | $530 | 2,311,756 | Direct |
| 21 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 2,500 | $1.06 | $2.64K | 2,322,625 | Direct |
| 21 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 2,500 | $1.06 | $2.64K | 2,322,625 | Direct |
| 21 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 2,500 | $1.06 | $2.64K | 2,322,625 | Direct |
| 19 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 300 | $0.95 | $285 | 2,325,125 | Direct |
| 19 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 300 | $0.95 | $285 | 2,325,125 | Direct |
| 19 Mar, 2025 | Daishin Yasui | TenPercentOwner | Disposed S | 300 | $0.95 | $285 | 2,325,125 | Direct |
| 01 Oct, 2024 | Keisuke Kuno | Cx Division Vice President | Acquired A | 9,355 | $0.00 | $0 | 101,785 | Direct |
| 01 Oct, 2024 | Kimio Hosaka | Chief Operating Officer | Acquired A | 8,310 | $0.00 | $0 | 115,434 | Direct |