NASDAQ : ATEC
$0.14 (1.8%)
1.29%
33
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0.00
change: -22.7583 | last: 0.227617.33M
| Filing Date | Reporting Person | Amount Beneficially Owned | % of Class |
|---|---|---|---|
| 2025-04-23 | Paul Segal | 7.2M | 4.96% |
| 2025-04-23 | L-5 Healthcare Partners, LLC | 7.2M | 4.96% |
| 2025-04-11 | L-5 Healthcare Partners, LLC | 7.7M | 5.30% |
| 2025-04-11 | Paul Segal | 7.7M | 5.30% |
| 2025-02-06 | L-5 Healthcare Partners, LLC | 9.21M | 6.45% |
| 2024-01-29 | (1)Names of reporting persons. BlackRock, Inc. | 7.69M | 5.60% |
| 2021-04-12 | (1) BlackRock, Inc. | 4.37M | 4.60% |
| 2021-03-11 | Squadron Capital LLC | 11.4M | 12.00% |
| 2021-03-11 | Squadron Capital Holdings LLC | 11.4M | 12.00% |
| 2021-03-11 | David R. Pelizzon | 11.54M | 12.10% |
| 2021-03-11 | Jennifer N. Pritzker | 14.16M | 14.90% |
| 2021-02-02 | (1) BlackRock, Inc. | 3.92M | 5.00% |
| 2020-02-14 | Steven Boyd | - | 0.00% |
| 2020-02-14 | Armistice Capital Master Fund Ltd. | - | 0.00% |
| 2020-02-14 | Armistice Capital, LLC | - | 0.00% |
| 2019-02-15 | UBS Group AG directly and on behalf of certain subsidiaries | 2.97M | 6.86% |
| 2019-02-14 | Armistice Capital, LLC | 3.34M | 7.73% |
| 2019-02-14 | Steven Boyd | 3.34M | 7.73% |
| 2019-02-14 | Armistice Capital Master Fund Ltd. | 3.34M | 7.73% |
| 2019-02-14 | Niraj Gupta | 883.95K | 2.00% |
| 2019-02-13 | Stonepine Capital Management, LLC | 1.15M | 11.00% |
| 2019-02-13 | Jon M. Plexico | 1.15M | 11.00% |
| 2019-02-13 | Timothy P. Lynch | 1.15M | 11.00% |
| 2019-02-13 | Stonepine Capital, L.P. | 1.15M | 11.00% |
| 2018-03-19 | Steven Boyd | 2.55M | 9.99% |
| 2018-03-19 | Armistice Capital, LLC | 2.55M | 9.99% |
| 2018-03-19 | Armistice Capital Master Fund Ltd. | 2.55M | 9.99% |
| 2018-03-16 | Paul Segal | 14.68M | 29.66% |
| 2018-03-16 | L-5 Healthcare Partners, LLC | 14.68M | 29.66% |
| 2018-02-14 | Niraj Gupta | 1.07M | 6.40% |
| 2018-02-13 | Kevin Kotler | 145.51K | 0.87% |
| 2018-02-13 | Broadfin Capital, LLC | 145.51K | 0.87% |
| 2018-02-13 | Broadfin Healthcare Master Fund, Ltd. | 145.51K | 0.87% |
| 2018-01-08 | MOM, LLC | 500K | 2.50% |
| 2018-01-08 | Patrick S. Miles | 1.83M | 9.10% |
| 2017-06-01 | Niraj Gupta | 814.46K | 7.50% |
| 2017-03-29 | GS Mezzanine Partners, L.P. | 1.07M | 2.14% |
| 2017-02-14 | Deerfield Special Situations Fund, L.P. | - | 0.00% |
| 2017-02-14 | James E. Flynn | - | 0.00% |
| 2017-02-14 | Deerfield Mgmt, L.P. | - | 0.00% |
| 2017-02-14 | Deerfield Management Company, L.P. | - | 0.00% |
| 2017-02-14 | Deerfield Private Design International II, L.P. | - | 0.00% |
| 2017-02-14 | Deerfield Private Design Fund II, L.P. | - | 0.00% |
| 2016-02-16 | Deerfield Management Company, L.P. | 16.43M | 9.99% |
| 2016-02-16 | Deerfield Private Design International II, L.P. | 4.59M | 4.34% |
| 2016-02-16 | James E. Flynn | 16.43M | 9.99% |
| 2016-02-16 | Deerfield Private Design Fund II, L.P. | 4M | 3.81% |
| 2016-02-16 | Deerfield Special Situations International Master Fund, L.P. | - | 0.00% |
| 2016-02-16 | Deerfield Special Situations Fund, L.P. | 7.85M | 7.55% |
| 2016-02-16 | Deerfield Mgmt, L.P. | 16.43M | 9.99% |
| 2015-02-17 | Deerfield Management Company, L.P. | 15.43M | 9.98% |
| 2015-02-17 | Deerfield Mgmt, L.P. | 15.43M | 9.98% |
| 2015-02-17 | Deerfield Special Situations Fund, L.P. | 3.75M | 3.71% |
| 2015-02-17 | Deerfield Special Situations International Master Fund, L.P. | 3.09M | 3.06% |
| 2015-02-17 | Deerfield Private Design Fund II, L.P. | 4M | 3.86% |
| 2015-02-17 | Deerfield Private Design International II, L.P. | 4.59M | 4.40% |
| 2015-02-17 | James E. Flynn | 15.43M | 9.98% |
| 2015-02-12 | 14-1770168 | 4.47M | 4.56% |
| 2014-03-28 | Deerfield Private Design International II, L.P. | 4.11M | 4.04% |
| 2014-03-28 | Deerfield Management Company, L.P. | 14.23M | 9.98% |
| 2014-03-28 | Deerfield Special Situations Fund, L.P. | 3.61M | 3.65% |
| 2014-03-28 | Deerfield Special Situations International Master Fund, L.P. | 2.93M | 2.97% |
| 2014-03-28 | Deerfield Private Design Fund II, L.P. | 3.58M | 3.54% |
| 2014-03-28 | Deerfield Mgmt, L.P. | 14.23M | 9.98% |
| 2014-03-28 | James E. Flynn | 14.23M | 9.98% |
| 2014-02-14 | 14-1770168 | 7.67M | 7.86% |
| 2013-02-12 | 14-1770168 | 6.53M | 7.19% |
| 2012-02-14 | 04-2683227 | 3.63M | 4.07% |
| 2012-02-13 | 14-1770168 | 5.35M | 5.99% |
| 2011-02-14 | 04-2683227 | 5.06M | 5.72% |
| 2009-06-19 | John H. Foster | 20.21M | 39.40% |
| 2009-06-19 | HGP II, LLC | 6.69M | 13.00% |
| 2009-06-19 | Mortimer Berkowitz III | 20.04M | 39.10% |
| 2009-06-19 | HealthpointCapital Partners II, L.P. | 6.69M | 13.00% |
| Date | Stock Price | Shares Outstanding | Market Cap | Cash & Equivalents | Total Debt | Enterprise Value |
|---|---|---|---|---|---|---|
| 2025-12-31 | $21.04 | 150.06M | $3.16B | $160.81M | $619.95M | $3.62B |
| 2024-12-31 | $9.18 | 142.95M | $1.31B | $138.84M | $609.94M | $1.78B |
| 2023-12-31 | $15.11 | 121.24M | $1.83B | $220.97M | $541.68M | $2.15B |
| 2022-12-31 | $12.35 | 103.37M | $1.28B | $84.7M | $395.86M | $1.59B |
| 2021-12-30 | $11.62 | 96.2M | $1.12B | $187.25M | $355.43M | $1.29B |
| 2020-12-31 | $14.52 | 67.02M | $973.13M | $107.76M | $43.16M | $908.53M |
| 2019-12-31 | $7.10 | 52.23M | $370.6M | $47.11M | $56.18M | $379.66M |
| 2018-12-31 | $2.29 | 35.32M | $80.87M | $29.05M | $3.28M | $55.09M |
| 2017-12-31 | $2.66 | 12.79M | $34.02M | $22.47M | $41.07M | $52.62M |
| 2016-12-31 | $3.21 | 8.58M | $27.55M | $19.59M | $3.11M | $11.07M |
| Date | Stock Price | Shares Outstanding | Market Cap | Cash & Equivalents | Total Debt | Enterprise Value |
|---|---|---|---|---|---|---|
| 2026-03-31 | $10.88 | 154.05M | $1.68B | $139.91M | $603.06M | $2.14B |
| 2025-12-31 | $21.04 | 150.06M | $3.16B | $160.81M | $619.95M | $3.62B |
| 2025-09-30 | $14.54 | 151.4M | $2.2B | $155.74M | $591.15M | $2.64B |
| 2025-06-30 | $11.10 | 149.91M | $1.66B | $157.06M | $586.63M | $2.09B |
| 2025-03-31 | $10.14 | 146.73M | $1.49B | $153.24M | $581.28M | $1.92B |
| 2024-12-31 | $9.18 | 142.95M | $1.31B | $138.84M | $609.94M | $1.78B |
| 2024-09-30 | $5.56 | 143.49M | $797.82M | $80.98M | $563.85M | $1.28B |
| 2024-06-30 | $9.98 | 142.69M | $1.42B | $99.83M | $555.52M | $1.88B |
| 2024-03-31 | $13.96 | 140.98M | $1.97B | $144.08M | $540.74M | $2.36B |
| 2023-12-31 | $15.11 | 133.75M | $2.02B | $220.97M | $541.68M | $2.34B |
| 2023-09-30 | $12.97 | 122.47M | $1.59B | $122.53M | $537.96M | $2B |
| 2023-06-30 | $17.98 | 118.72M | $2.13B | $101.02M | $487.66M | $2.52B |