Koppikar Utpal insider trades
Koppikar Utpal has filed 19 Form 4s with the SEC that we hold, for Atara Biotherapeutics, Inc. (ATRA) (Chief Financial Officer), C4 Therapeutics, Inc. (CCCC) (Director), FLXN (Director) and INSMED Inc (INSM) (Director). Across all of them we count 1 purchase worth $31.7K and 13 sales worth $339.8K reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a sale of 3,655 shares of Atara Biotherapeutics, Inc. worth $62.6K, dated 2021-11-16. The first filing on our record is dated 2021-07-12 and the latest 2026-10-20.
Atara Biotherapeutics, Inc. (ATRA)
| Trade date | Code | Shares | Value as filed | Filed | Source |
|---|---|---|---|---|---|
| 2021-08-17 | S, sale reported on Form 4 | 3,579 | $44.8K | 2021-08-19 | SEC |
| 2021-11-16 | S, sale reported on Form 4 | 3,655 | $62.6K | 2021-11-18 | SEC |
| 2022-02-07 | S, sale reported on Form 4 | 2,496 | $36.1K | 2022-02-09 | SEC |
| 2022-03-01 | S, sale reported on Form 4 | 1,491 | $14.7K | 2022-03-03 | SEC |
| 2022-03-01 | S, sale reported on Form 4 | 2,272 | $22.4K | 2022-03-03 | SEC |
| 2022-05-17 | S, sale reported on Form 4 | 4,616 | $24.6K | 2022-05-19 | SEC |
| 2022-05-17 | S, sale reported on Form 4 | 966 | $5.1K | 2022-05-19 | SEC |
| 2022-06-08 | S, sale reported on Form 4 | 5,853 | $33.0K | 2022-06-10 | SEC |
| 2022-08-16 | S, sale reported on Form 4 | 5,940 | $29.9K | 2022-08-18 | SEC |
| 2022-11-16 | S, sale reported on Form 4 | 5,172 | $23.2K | 2022-11-18 | SEC |
| 2022-11-16 | S, sale reported on Form 4 | 1,083 | $4.9K | 2022-11-18 | SEC |
| 2023-02-07 | S, sale reported on Form 4 | 2,485 | $13.6K | 2023-02-09 | SEC |
| 2023-03-02 | S, sale reported on Form 4 | 6,871 | $24.9K | 2023-03-06 | SEC |
C4 Therapeutics, Inc. (CCCC)
| Trade date | Code | Shares | Value as filed | Filed | Source |
|---|---|---|---|---|---|
| 2023-02-08 | P, purchase reported on Form 4 | 5,667 | $31.7K | 2023-02-10 | SEC |
FLXN
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
INSMED Inc (INSM)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1742696) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

