CBLL's three largest insider shareholders as of September 09, 2026 are Gp A, Llc Tpg (TenPercentOwner, 3.97Mn shares), Gp A, Llc Tpg (Other, 3.77Mn shares), Bakker Juliet Tammenoms (Director, 2.48Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Gp A, Llc Tpg | Other | 0 | 3,765,054 | 3,765,054 | 72.8% | 30 Jun, 2026 |
| 2 | Xingjuan Chao | President And Ceo | 767,191 | 0 | 767,191 | 14.8% | 04 Sep, 2026 |
| 3 | Raymond Woo | Chief Technology Officer | 194,729 | 0 | 194,729 | 3.8% | 25 Aug, 2026 |
| 4 | Scott Blumberg | Chief Financial Officer | 146,600 | 0 | 146,600 | 2.8% | 04 Sep, 2026 |
| 5 | Joseph S. Manni | Chief Revenue Officer | 55,956 | 0 | 55,956 | 1.1% | 25 Aug, 2026 |
| 6 | Joseph Michael Taylor | Director | 48,478 | 0 | 48,478 | 0.9% | 14 Aug, 2026 |
| 7 | David Foehr | Senior Vp, Finance And Pao | 35,899 | 0 | 35,899 | 0.7% | 25 Aug, 2026 |
| 8 | Erica J. Rogers | Director | 33,054 | 0 | 33,054 | 0.6% | 04 Jun, 2026 |
| 9 | Rebecca B Robertson | Director | 26,587 | 0 | 26,587 | 0.5% | 04 Jun, 2026 |
| 10 | Bakker Juliet Tammenoms | Director | 23,284 | 0 | 23,284 | 0.4% | 04 Jun, 2026 |
| 11 | Josef Parvizi | Director | 23,284 | 0 | 23,284 | 0.4% | 04 Jun, 2026 |
| 12 | William W Burke | Director | 23,022 | 0 | 23,022 | 0.4% | 02 Jul, 2026 |
| 13 | Sharon O'Keefe | Director | 16,011 | 0 | 16,011 | 0.3% | 30 Jul, 2026 |
| 14 | Thomas A. West | Director | 16,011 | 0 | 16,011 | 0.3% | 30 Jul, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 02 Sep, 2026 | Scott Blumberg | Chief Financial Officer | Acquired M | 652 | $9.41 | $6.14K | 147,252 | Direct |
| 02 Sep, 2026 | Xingjuan Chao | President And Ceo | Acquired M | 1,446 | $4.70 | $6.80K | 783,177 | Direct |
| 02 Sep, 2026 | Xingjuan Chao | President And Ceo | Acquired M | 23,554 | $4.70 | $110.70K | 806,731 | Direct |
| 02 Sep, 2026 | Scott Blumberg | Chief Financial Officer | Disposed S | 652 | $25.00 | $16.30K | 146,600 | Direct |
| 02 Sep, 2026 | Scott Blumberg | Chief Financial Officer | Disposed M | 652 | $0.00 | $0 | 52,648 | Direct |
| 02 Sep, 2026 | Xingjuan Chao | President And Ceo | Disposed S | 39,540 | $24.61 | $973.08K | 767,191 | Direct |
| 02 Sep, 2026 | Xingjuan Chao | President And Ceo | Disposed M | 1,446 | $0.00 | $0 | 285,818 | Direct |
| 02 Sep, 2026 | Xingjuan Chao | President And Ceo | Disposed M | 23,554 | $0.00 | $0 | 30,815 | Direct |
| 21 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Disposed S | 1,521 | $24.02 | $36.53K | 146,600 | Direct |
| 21 Aug, 2026 | David Foehr | Senior Vp, Finance And Pao | Disposed S | 993 | $24.02 | $23.85K | 36,758 | Direct |
| 21 Aug, 2026 | Raymond Woo | Chief Technology Officer | Disposed S | 1,979 | $24.02 | $47.54K | 194,729 | Direct |
| 21 Aug, 2026 | Xingjuan Chao | President And Ceo | Disposed S | 6,068 | $24.02 | $145.75K | 781,731 | Direct |
| 24 Aug, 2026 | David Foehr | Senior Vp, Finance And Pao | Disposed S | 859 | $23.95 | $20.57K | 35,899 | Direct |
| 18 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Acquired M | 690 | $4.70 | $3.24K | 148,811 | Direct |
| 18 Aug, 2026 | Xingjuan Chao | President And Ceo | Disposed S | 2,199 | $25.00 | $54.98K | 819,214 | Direct |
| 18 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Acquired M | 300 | $9.41 | $2.82K | 149,111 | Direct |
| 19 Aug, 2026 | Xingjuan Chao | President And Ceo | Disposed S | 31,415 | $25.03 | $786.32K | 787,799 | Direct |
| 18 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Disposed S | 990 | $25.00 | $24.75K | 148,121 | Direct |
| 19 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Acquired M | 6,179 | $4.70 | $29.04K | 154,300 | Direct |
| 19 Aug, 2026 | Scott Blumberg | Chief Financial Officer | Acquired M | 27,333 | $9.41 | $257.20K | 181,633 | Direct |