Erik Ostrowski, SVP, CFO, CBO, and Treasurer at Akebia Therapeutics ($AKBA), made two open market sales of company shares in the last year, totaling about $200 thousand. His most recent sale occurred on February 2, 2026. These transactions rank 8,410th out of 11,678 individual insiders, well below the average sale amount of $8.6 million across 6 transactions per insider. Ostrowski had no open market purchases in the period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 2, 2026 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | S | Common Stock | 34951 | $1.39 | 672,635.0000 | 274,372,722 | 4.94% | 0.01% |
| Jan. 30, 2026 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Common Stock | 204000 | $0.00 | 707,586.0000 | 274,372,722 | 40.51% | 0.07% |
| Jan. 30, 2026 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Stock Option (Right to buy) | 320000 | $0.00 | 320,000.0000 | 274,372,722 | 9999.99% | 0.12% |
| June 30, 2025 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | S | Common Stock | 41314 | $3.67 | 503,586.0000 | 210,946,658 | 7.58% | 0.02% |
| Jan. 31, 2025 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Common Stock | 194900 | $0.00 | 544,900.0000 | 210,946,658 | 55.69% | 0.09% |
| Jan. 31, 2025 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Stock Option (Right to buy) | 292300 | $0.00 | 292,300.0000 | 210,946,658 | 9999.99% | 0.14% |
| June 28, 2024 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Common Stock | 350000 | $0.00 | 350,000.0000 | 187,465,448 | 9999.99% | 0.19% |
| June 28, 2024 | Akebia Therapeutics, Inc. | $AKBA | Ostrowski Erik | SVP, CFO, CBO & Treasurer | A | Stock Option (Right to buy) | 500000 | $0.00 | 500,000.0000 | 187,465,448 | 9999.99% | 0.27% |
| Feb. 1, 2024 | Tectonic Therapeutic, Inc. | $TECX | Ostrowski Erik | Interim CEO, President and CFO | M | Common Stock | 40084 | $0.00 | 42,384.0000 | 0 | 1742.78% | 0.00% |
| Feb. 1, 2024 | Tectonic Therapeutic, Inc. | $TECX | Ostrowski Erik | Interim CEO, President and CFO | M | Restricted Stock Unit | 40084 | $0.00 | 120,249.0000 | 0 | 25.00% | 0.00% |
| Feb. 5, 2024 | Tectonic Therapeutic, Inc. | $TECX | Ostrowski Erik | Interim CEO, President and CFO | F | Common Stock | 13099 | $1.20 | 29,285.0000 | 0 | 30.91% | 0.00% |
| July 1, 2023 | Tectonic Therapeutic, Inc. | $TECX | Ostrowski Erik | Interim CEO, President and CFO | A | Restricted Stock Unit | 70000 | $0.00 | 70,000.0000 | 0 | 9999.99% | 0.00% |
| Feb. 8, 2023 | Tectonic Therapeutic, Inc. | $TECX | Ostrowski Erik | Chief Financial Officer | A | Restricted Stock Unit | 160333 | $0.00 | 160,333.0000 | 0 | 9999.99% | 0.00% |