NASDAQ : ATHA
-$0.44 (-6.12%)
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| Filing Date | Reporting Person | Amount Beneficially Owned | % of Class |
|---|---|---|---|
| 2026-05-15 | ADAR1 Capital Management, LLC | 727.48K | 7.70% |
| 2026-05-07 | Perceptive Xontogeny Venture Fund II, LP | 352.8K | 3.70% |
| 2026-05-07 | Perceptive Advisors LLC | 1.88M | 19.99% |
| 2026-05-07 | Joseph Edelman | 1.88M | 19.99% |
| 2026-05-07 | Perceptive Life Sciences Master Fund, Ltd. | 1.55M | 16.50% |
| 2026-02-06 | Baselake Partners, LP | 75789.0 | 1.90% |
| 2026-01-16 | Perceptive Xontogeny Venture Fund II, LP | 329.76K | 3.50% |
| 2026-01-16 | Perceptive Advisors LLC | 1.86M | 19.99% |
| 2026-01-16 | Perceptive Life Sciences Master Fund, Ltd. | 1.53M | 16.40% |
| 2026-01-16 | Joseph Edelman | 1.86M | 19.99% |
| 2026-01-08 | ACORN BIOVENTURES, L.P. | 250.35K | 2.60% |
| 2025-12-23 | Perceptive Xontogeny Venture Fund II, LP | 329.76K | 3.50% |
| 2025-12-23 | ACORN BIOVENTURES, L.P. | 210.73K | 2.20% |
| 2025-12-23 | Perceptive Advisors LLC | 1.86M | 19.99% |
| 2025-12-23 | Joseph Edelman | 1.87M | 20.10% |
| 2025-12-23 | Perceptive Life Sciences Master Fund, Ltd. | 1.53M | 16.40% |
| 2025-12-22 | Joseph Edelman | 550.02K | 13.90% |
| 2025-12-22 | Perceptive Life Sciences Master Fund, Ltd. | 540.3K | 13.70% |
| 2025-12-22 | Perceptive Advisors LLC | 540.3K | 13.70% |
| 2025-12-18 | BML Investment Partners, L.P. | - | 0.00% |
| 2025-11-14 | Baselake Partners, LP | 197.48K | 5.00% |
| 2025-10-10 | Oliveira Steven Michael | 161.22K | 4.09% |
| 2025-04-16 | Steven Michael Oliveira | 1.99M | 5.11% |
| 2025-02-14 | BML Investment Partners, L.P. | 2.78M | 7.20% |
| 2025-02-14 | BML Investment Partners, L.P. | 2.23M | 5.80% |
| 2024-11-07 | BML Investment Partners, L.P. | 2.23M | 5.80% |
| 2024-11-07 | Braden M Leonard | 2.48M | 6.50% |
| 2024-02-14 | Felix J. Baker | 3.15M | 8.30% |
| 2024-02-14 | Baker Bros. Advisors LP | 3.15M | 8.30% |
| 2024-02-14 | Baker Bros. Advisors (GP) LLC | 3.15M | 8.30% |
| 2024-02-14 | Julian C. Baker | 3.15M | 8.30% |
| 2023-04-20 | Richard A. Kayne | 1.98M | 5.30% |
| 2022-07-01 | Perceptive Life Sciences Master Fund, Ltd. | 4.8M | 12.70% |
| 2022-07-01 | Perceptive Advisors LLC | 4.81M | 12.80% |
| 2022-07-01 | Joseph Edelman | 4.81M | 12.80% |
| 2022-02-14 | VHCP Management EG, LLC | 1M | 2.70% |
| 2022-02-14 | Roderick Wong | 1.91M | 5.10% |
| 2022-02-14 | Koh, Bong | 1M | 2.70% |
| 2022-02-14 | Venrock Healthcare Capital Partners III, L.P. | 1M | 2.70% |
| 2022-02-14 | VHCP Co-Investment Holdings II, LLC | 1M | 2.70% |
| 2022-02-14 | Venrock Healthcare Capital Partners II, L.P. | 1M | 2.70% |
| 2022-02-14 | RTW Investments, LP | 1.91M | 5.10% |
| 2022-02-14 | Venrock Healthcare Capital Partners EG, L.P. | 1M | 2.70% |
| 2022-02-14 | VHCP Co-Investment Holdings III, LLC | 1M | 2.70% |
| 2022-02-14 | VHCP Management II, LLC | 1M | 2.70% |
| 2022-02-14 | VHCP Management III, LLC | 1M | 2.70% |
| 2022-02-14 | Shah, Nimish | 1M | 2.70% |
| 2022-02-04 | (1) BlackRock, Inc. | 2.46M | 6.60% |
| 2022-02-03 | Franklin Resources, Inc. | 2.08M | 5.60% |
| 2021-02-16 | Shah, Nimish | 1.69M | 5.20% |
| 2021-02-16 | VHCP Management EG, LLC | 1.69M | 5.20% |
| 2021-02-16 | VHCP Management III, LLC | 1.69M | 5.20% |
| 2021-02-16 | Venrock Healthcare Capital Partners II, L.P. | 1.69M | 5.20% |
| 2021-02-16 | VHCP Co-Investment Holdings II, LLC | 1.69M | 5.20% |
| 2021-02-16 | Venrock Healthcare Capital Partners III, L.P. | 1.69M | 5.20% |
| 2021-02-16 | Leen Kawas | 1.69M | 5.20% |
| 2021-02-16 | VHCP Management II, LLC | 1.69M | 5.20% |
| 2021-02-16 | Koh, Bong | 1.69M | 5.20% |
| 2021-02-16 | Venrock Healthcare Capital Partners EG, L.P. | 1.69M | 5.20% |
| 2021-02-16 | VHCP Co-Investment Holdings III, LLC | 1.69M | 5.20% |
| 2021-02-12 | Roderick Wong | 2.69M | 8.26% |
| 2021-02-16 | Viking Global Opportunities Portfolio GP LLC | 2.12M | 6.00% |
| 2021-02-16 | Viking Global Opportunities Liquid Portfolio Sub-Master LP | 750K | 2.10% |
| 2021-02-16 | Viking Global Opportunities Illiquid Investments Sub-Master LP | 1.37M | 3.90% |
| 2021-02-16 | Andreas Halvorsen | 2.12M | 6.00% |
| 2021-02-16 | C. Ott | 2.12M | 6.00% |
| 2021-02-16 | S. Shabet | 2.12M | 6.00% |
| 2021-02-16 | Viking Global Investors LP | 2.12M | 6.00% |
| 2021-02-12 | RTW Investments, LP | 2.69M | 8.26% |
| 2021-02-12 | RTW Master Fund, Ltd. | 1.7M | 5.22% |
| 2021-02-16 | Viking Global Opportunities GP LLC | 2.12M | 6.00% |
| 2021-02-08 | Perceptive Life Sciences Master Fund, Ltd. | 3.43M | 9.80% |
| 2021-02-08 | Perceptive Advisors LLC | 3.43M | 9.80% |
| 2021-02-08 | Joseph Edelman | 3.43M | 9.80% |
| 2020-11-16 | Koh, Bong | 1.66M | 5.10% |
| 2020-11-16 | VHCP Management EG, LLC | 1.66M | 5.10% |
| 2020-11-16 | VHCP Co-Investment Holdings III, LLC | 1.66M | 5.10% |
| 2020-11-16 | Venrock Healthcare Capital Partners III, L.P. | 1.66M | 5.10% |
| 2020-11-16 | Venrock Healthcare Capital Partners II, L.P. | 1.66M | 5.10% |
| 2020-11-16 | Shah, Nimish | 1.66M | 5.10% |
| 2020-11-16 | Venrock Healthcare Capital Partners EG, L.P. | 1.66M | 5.10% |
| 2020-11-16 | VHCP Management II, LLC | 1.66M | 5.10% |
| 2020-11-16 | VHCP Co-Investment Holdings II, LLC | 1.66M | 5.10% |
| 2020-11-16 | VHCP Management III, LLC | 1.66M | 5.10% |
| 2020-09-28 | Roderick Wong | 2.67M | 8.66% |
| 2020-09-28 | RTW Master Fund, Ltd. | 1.7M | 5.50% |
| 2020-09-28 | Andreas Halvorsen | 2.12M | 6.90% |
| 2020-09-28 | C. Ott | 2.12M | 6.90% |
| 2020-09-28 | S. Shabet | 2.12M | 6.90% |
| 2020-09-28 | Viking Global Investors LP | 2.12M | 6.90% |
| 2020-09-28 | RTW Investments, LP | 2.67M | 8.66% |
| 2020-09-28 | Viking Global Opportunities GP LLC | 2.12M | 6.90% |
| 2020-09-28 | Viking Global Opportunities Portfolio GP LLC | 2.12M | 6.90% |
| 2020-09-28 | Viking Global Opportunities Liquid Portfolio Sub-Master LP | 750K | 2.40% |
| 2020-09-28 | Viking Global Opportunities Illiquid Investments Sub-Master LP | 1.37M | 4.40% |
| Date | Stock Price | Shares Outstanding | Market Cap | Cash & Equivalents | Total Debt | Enterprise Value |
|---|---|---|---|---|---|---|
| 2025-12-31 | $7.57 | 4.28M | $32.37M | $69.28M | $803K | -$36.11M |
| 2024-12-31 | $5.87 | 3.85M | $22.59M | $48.44M | $1.22M | -$24.63M |
| 2023-12-31 | $24.30 | 3.8M | $92.39M | $90.58M | $1.58M | $3.39M |
| 2022-12-31 | $31.70 | 3.77M | $119.61M | $95.97M | $1.91M | $25.56M |
| 2021-12-31 | $130.30 | 3.69M | $481.08M | $110.54M | $1.92M | $372.47M |
| 2020-12-31 | $342.50 | 3.25M | $1.11B | $60.62M | $1M | $1.05B |
| 2019-12-31 | $171.10 | 3.26M | $558.12M | $2.06M | $1.55M | $557.61M |
| 2018-12-31 | $171.10 | 3.26M | $558.12M | $3.32M | $722K | $555.52M |
| Date | Stock Price | Shares Outstanding | Market Cap | Cash & Equivalents | Total Debt | Enterprise Value |
|---|---|---|---|---|---|---|
| 2026-03-31 | $4.79 | 19.03M | $91.14M | $32.83M | $691K | $59M |
| 2025-12-31 | $7.57 | 4.28M | $32.37M | $69.28M | $803K | -$36.11M |
| 2025-09-30 | $4.14 | 3.94M | $16.33M | $20.87M | $912K | -$3.63M |
| 2025-06-30 | $3.02 | 3.91M | $11.81M | $19.89M | $1.02M | -$7.06M |
| 2025-03-31 | $2.85 | 3.9M | $11.13M | $26.42M | $1.12M | -$14.18M |
| 2024-12-31 | $5.87 | 3.85M | $22.59M | $48.44M | $1.22M | -$24.63M |
| 2024-09-30 | $4.46 | 3.85M | $17.18M | $68.86M | $1.31M | -$50.36M |
| 2024-06-30 | $25.10 | 3.84M | $96.33M | $73.83M | $1.41M | $23.91M |
| 2024-03-31 | $25.10 | 3.83M | $96.19M | $77.82M | $1.5M | $19.86M |
| 2023-12-31 | $24.30 | 3.81M | $92.61M | $90.58M | $1.58M | $3.61M |
| 2023-09-30 | $20.20 | 3.81M | $76.87M | $110.33M | $1.67M | -$31.79M |
| 2023-06-30 | $29.50 | 3.8M | $112.1M | $113.63M | $1.75M | $224.76K |