Rebecca B. Robertson serves as Executive at HELICOS BIOSCIENCES CORP, where they oversee executive responsibilities. Since joining the company, Rebecca B. Robertson has executed 34 insider transactions totaling $2.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 8, 2025 involved exercising options for 5,000 shares valued at $11.2K.
Rebecca B. Robertson currently holds 13,388 shares of HELICOS BIOSCIENCES CORP (HLCS), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Rebecca B. Robertson has been a net seller of HLCS stock. They have purchased $624.3K and sold $2.3M worth of shares.
Rebecca B. Robertson's most recent insider trade was on Dec 8, 2025, when they sold 5,000 shares at $2.24 per share.
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| $20.00 |
| Discretionary |
| Dec 2, 2025 | CBLL | $13.8K | Sale | 827 | $16.67 | Discretionary |
| Sep 3, 2025 | CBLL | $9.4K | Sale | 827 | $11.36 | Discretionary |
| May 24, 2024 | TNDM | $229.4K | Option Exercise | 4,434 | $51.73 | Discretionary |
| May 25, 2023 | TNDM | $0 | Option Exercise | 2,757 | $N/A | Discretionary |
| May 18, 2022 | TNDM | $0 | Option Exercise | 2,205 | $N/A | Discretionary |
| May 2, 2022 | TNDM | $93.9K | Sale | 967 | $97.10 | Discretionary |
| May 2, 2022 | TNDM | $51.0K | Option Exercise | 1,500 | $34.00 | Discretionary |
| May 2, 2022 | TNDM | $51.2K | Sale | 533 | $96.05 | Discretionary |
| Feb 1, 2022 | TNDM | $51.0K | Option Exercise | 1,500 | $34.00 | Discretionary |
| Feb 1, 2022 | TNDM | $35.0K | Sale | 300 | $116.63 | Discretionary |
| Feb 1, 2022 | TNDM | $78.6K | Sale | 667 | $117.89 | Discretionary |
| Feb 1, 2022 | TNDM | $63.3K | Sale | 533 | $118.82 | Discretionary |
| Nov 1, 2021 | TNDM | $37.9K | Sale | 278 | $136.35 | Discretionary |
| Nov 1, 2021 | TNDM | $37.7K | Option Exercise | 1,108 | $34.00 | Discretionary |
| Nov 1, 2021 | TNDM | $165.8K | Sale | 1,222 | $135.64 | Discretionary |
| Aug 2, 2021 | TNDM | $161.3K | Sale | 1,500 | $107.51 | Discretionary |
| Jun 9, 2021 | TNDM | $17.0K | Option Exercise | 500 | $34.00 | Discretionary |
| Jun 9, 2021 | TNDM | $45.0K | Sale | 500 | $90.00 | Discretionary |
| Jun 1, 2021 | TNDM | $85.1K | Sale | 1,000 | $85.11 | Discretionary |
| Jun 1, 2021 | TNDM | $34.0K | Option Exercise | 1,000 | $34.00 | Discretionary |
| May 27, 2021 | TNDM | $0 | Option Exercise | 1,892 | $N/A | Discretionary |
| Mar 1, 2021 | TNDM | $51.0K | Option Exercise | 1,500 | $34.00 | Discretionary |
| Mar 1, 2021 | TNDM | $144.2K | Sale | 1,500 | $96.14 | Discretionary |
| Dec 1, 2020 | TNDM | $51.0K | Option Exercise | 1,500 | $34.00 | Discretionary |
| Dec 1, 2020 | TNDM | $141.0K | Sale | 1,500 | $94.03 | Discretionary |
| Sep 2, 2020 | TNDM | $204.5K | Sale | 1,800 | $113.61 | Discretionary |
| Sep 2, 2020 | TNDM | $99.9K | Sale | 866 | $115.38 | Discretionary |
| Sep 2, 2020 | TNDM | $511.7K | Sale | 4,466 | $114.58 | Discretionary |