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Amphastar Pharmaceuticals Quarterly Balance Sheets Chart

Quarterly
 | 
Annual
 
 Account Receivables  
 Cash and Cash Eq  
 Inventory  
20200930 20201231 20210331 20210630 20210930 20211231 20220331 20220630 20220930 20221231 20230331 20230630 20230930 20231231 20240331 20240630 20240930 20241231 20250331 20250630 038.1176.22114.33152.44190.56228.67266.78Milllion

Amphastar Pharmaceuticals Quarterly Balance Sheets Table

Quarterly
 | 
Annual
 
Unit: USD2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 
                                               
  ​                                             
  assets                                             
  current assets:                                             
  cash and cash equivalents187,689,000 182,782,000 151,609,000 192,116,000 189,619,000 201,148,000 144,296,000 266,778,000 148,595,000 176,615,000 156,098,000 157,244,000 166,157,000 172,627,000 126,353,000 106,610,000 105,432,000 101,601,000 92,642,000 87,910,000 87,388,000 54,845,000 73,685,000 85,611,000 120,373,000 79,096,000 86,337,000 68,734,000 48,070,000 54,547,000 65,594,000 66,920,000 82,544,000 76,766,000 72,354,000 66,598,000 66,660,000 63,332,000 66,074,000 70,681,000 74,463,000 68,588,000 67,828,000 72,881,000 64,081,000 
  restricted cash235,000 235,000 235,000 235,000 235,000 235,000 235,000 4,259,000 2,685,000 235,000 235,000 235,000 235,000 235,000 235,000 235,000 19,159,000 235,000 1,865,000 1,865,000 1,865,000 1,865,000 1,865,000 1,865,000 1,865,000 1,865,000                    
  short-term investments44,062,000 54,101,000 70,036,000 58,375,000 28,156,000 88,407,000 112,510,000 33,098,000 14,541,000 16,277,000 19,664,000 26,843,000 17,234,000 14,383,000 10,320,000 8,021,000 11,745,000 13,531,000 12,977,000 10,873,000 11,101,000 12,203,000 11,675,000 12,666,000 2,836,000 2,834,000 2,831,000 2,829,000 2,818,000 2,826,000 2,635,000 2,522,000 727,000 746,000 527,000 856,000          
  restricted short-term investments2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,200,000 2,290,000 2,290,000 2,290,000 2,290,000 2,290,000      4,155,000 4,155,000 1,519,000 1,390,000 1,390,000          
  accounts receivable132,982,000 144,636,000 136,289,000 139,635,000 131,412,000 138,114,000 114,943,000 118,990,000 104,715,000 100,638,000 88,804,000 77,099,000 80,810,000 73,166,000 78,804,000 78,090,000 67,893,000 77,938,000 66,005,000 52,382,000 49,862,000 57,784,000 45,376,000 45,255,000 48,823,000 54,930,000 52,163,000 43,816,000 41,279,000 31,883,000 35,996,000 24,152,000 24,123,000 25,892,000 26,777,000 26,550,000 23,128,000 23,081,000 33,233,000 24,998,000 19,832,000 21,653,000 22,852,000 26,604,000 18,598,000 
  inventories191,731,000 185,476,000 153,741,000 130,316,000 122,411,000 115,494,000 105,833,000 109,978,000 104,617,000 103,647,000 103,584,000 103,250,000 98,733,000 95,147,000 92,807,000 100,240,000 97,931,000 97,110,000 96,831,000 108,870,000 104,726,000 107,900,000 110,501,000 109,854,000 99,232,000 78,580,000 69,322,000 65,414,000 61,678,000 62,780,000 63,609,000 69,640,000 74,457,000 78,137,000 79,754,000 90,650,000 88,327,000 82,242,000 70,665,000 72,422,000 80,174,000 84,887,000 82,332,000 88,052,000 106,017,000 
  income tax refunds and deposits1,603,000 758,000 1,747,000 5,349,000 667,000 784,000 526,000 1,506,000 1,329,000 731,000 171,000 11,365,000 5,878,000 223,000 126,000 520,000 718,000 800,000 385,000 1,455,000 682,000 814,000 311,000 890,000 226,000 1,592,000 49,000 3,186,000 7,542,000 12,194,000 6,036,000 443,000 386,000 210,000 22,000           
  prepaid expenses and other assets20,328,000 17,773,000 18,214,000 17,723,000 7,945,000 8,696,000 9,057,000 6,196,000 5,872,000 7,327,000 7,563,000 5,986,000 5,898,000 6,434,000 7,274,000 7,755,000 5,895,000 6,749,000 6,777,000 10,986,000 8,997,000 9,023,000 9,538,000 10,472,000 8,489,000 8,956,000 5,485,000 6,670,000 4,404,000 5,661,000 9,753,000 8,660,000 7,187,000 8,147,000 3,272,000 3,983,000 1,752,000 3,092,000 4,439,000 4,200,000 3,264,000 3,934,000 3,683,000 4,913,000 3,699,000 
  total current assets580,830,000 587,961,000 534,071,000 545,949,000 482,645,000 555,078,000 489,600,000 543,005,000 384,554,000 407,670,000 378,319,000 384,222,000 377,145,000 364,415,000 318,119,000 303,671,000 310,973,000 300,164,000 279,682,000 276,541,000 266,821,000 246,724,000 255,241,000 268,903,000 284,134,000 230,143,000 220,342,000 194,804,000 169,946,000 174,046,000 187,778,000 176,492,000 193,579,000 191,417,000 184,096,000 190,186,000 181,313,000 173,442,000 175,934,000 199,059,000 203,898,000 202,597,000 197,996,000 215,180,000 214,227,000 
  property, plant, and equipment310,239,000 307,602,000 297,345,000 295,384,000 287,999,000 288,523,000 282,746,000 280,836,000 278,526,000 243,479,000 238,266,000 232,741,000 237,564,000 243,248,000 244,244,000 242,924,000 252,590,000 253,265,000 260,055,000 245,881,000 238,236,000 231,476,000 233,856,000 222,158,000 220,060,000 214,836,000 210,418,000 202,526,000 198,241,000 191,915,000 185,339,000 173,046,000 161,720,000 157,389,000 152,944,000 151,952,000 148,647,000 144,684,000 142,161,000 141,181,000 139,251,000 138,276,000 138,289,000 134,112,000 133,991,000 
  finance lease right-of-use assets296,000 335,000 383,000 426,000 469,000 516,000 564,000 610,000 657,000 706,000 753,000 601,000 201,000 278,000 353,000 428,000 540,000 594,000 612,000 693,000 774,000 798,000 887,000 896,000 985,000 1,094,000                    
  operating lease right-of-use assets44,199,000 45,822,000 46,899,000 31,708,000 32,104,000 31,352,000 32,333,000 32,666,000 26,327,000 25,801,000 25,554,000 26,456,000 26,962,000 27,843,000 26,894,000 27,663,000 27,169,000 19,280,000 20,042,000 20,256,000 17,086,000 17,934,000 18,805,000 19,463,000 20,143,000 13,480,000                    
  goodwill and intangible assets578,499,000 584,528,000 590,660,000 594,796,000 600,849,000 607,064,000 613,295,000 619,351,000 625,603,000 37,179,000 37,298,000 37,037,000 37,700,000 38,436,000 38,870,000 39,192,000 40,049,000 40,243,000 40,615,000 40,377,000 40,271,000 40,472,000 41,153,000 41,139,000 41,718,000 42,255,000 42,267,000 42,727,000 43,450,000 44,850,000 45,140,000 45,731,000 45,869,000 45,993,000 50,307,000 51,732,000 43,298,000 44,024,000 39,901,000 40,485,000 40,911,000 41,326,000 42,565,000 43,221,000 39,330,000 
  long-term investments2,047,000 5,913,000 10,996,000  9,944,000 15,163,000 14,685,000 972,000                                      
  other assets28,099,000 22,991,000 25,992,000 23,663,000 24,260,000 23,369,000 25,910,000 25,299,000 20,269,000 18,536,000 20,856,000 20,549,000 18,683,000 16,301,000 16,665,000 11,610,000 9,444,000 7,212,000 5,250,000 7,735,000 12,635,000 11,192,000 11,156,000 12,331,000 13,515,000 12,292,000 9,918,000 11,127,000 11,752,000 10,714,000 8,663,000 10,623,000 10,955,000 8,939,000 9,390,000 7,544,000 7,884,000 5,412,000 4,696,000 4,364,000 4,962,000 4,447,000 3,588,000 2,502,000 3,602,000 
  deferred tax assets71,124,000 71,124,000 71,124,000 53,252,000 53,252,000 53,252,000 53,252,000 40,868,000 40,868,000 38,527,000 38,527,000 22,399,000 22,399,000 22,399,000 22,399,000 21,996,000 24,980,000 24,980,000 24,980,000 22,235,000 24,235,000 24,235,000 25,873,000 20,746,000 20,746,000 30,618,000 30,618,000 29,458,000 28,257,000 28,257,000 27,745,000 31,874,000 31,874,000 31,874,000 31,001,000 27,423,000 27,444,000 27,444,000  19,176,000 19,176,000 19,707,000 19,533,000 16,096,000 16,096,000 
  total assets1,615,333,000 1,626,276,000 1,577,470,000 1,545,178,000 1,491,522,000 1,574,317,000 1,512,912,000 1,544,633,000 1,378,266,000 773,656,000 741,987,000 726,695,000 723,719,000 716,238,000 671,529,000 651,677,000 665,745,000 645,738,000 631,236,000 613,718,000 600,058,000 572,831,000 586,971,000 585,636,000 601,301,000 544,718,000 513,563,000 480,642,000 451,646,000 449,782,000 454,665,000 437,766,000 443,997,000 435,612,000 427,738,000 428,837,000 408,586,000 395,006,000 390,136,000 395,027,000 398,929,000 396,502,000 389,370,000 401,133,000 397,268,000 
  liabilities and stockholders' equity                                             
  current liabilities:                                             
  accounts payable and accrued liabilities166,552,000 175,940,000 157,057,000 153,268,000 131,212,000 116,697,000 93,366,000 222,719,000 217,536,000 88,886,000 84,242,000 95,796,000 97,665,000 95,810,000 89,545,000 88,911,000 109,604,000 108,545,000 95,504,000 79,292,000 75,385,000 65,438,000 77,051,000 75,137,000 88,171,000 90,795,000 87,418,000 76,362,000 67,092,000 58,498,000 57,555,000               
  income taxes payable1,049,000 15,142,000 9,664,000 1,281,000 1,514,000 5,857,000 1,609,000 31,092,000 17,696,000 11,590,000 4,571,000 1,531,000 597,000 13,116,000 9,081,000 3,960,000 3,631,000 2,676,000 1,077,000 1,619,000 2,345,000 2,994,000 2,042,000 1,400,000 3,150,000 1,017,000 1,187,000 1,667,000 1,607,000 7,983,000 3,325,000 4,181,000 6,222,000 8,099,000 7,705,000 6,210,000 6,652,000 4,257,000 3,076,000 2,094,000 2,748,000 3,000,000 3,123,000 2,791,000 2,773,000 
  current portion of long-term debt927,000 224,000 234,000 252,000 249,000 428,000 436,000 433,000 12,920,000 2,168,000 3,046,000 1,680,000 2,057,000 2,159,000 2,202,000 2,256,000 8,077,000 12,173,000 12,263,000 12,167,000 12,075,000 11,458,000 7,741,000 6,969,000 6,941,000 17,587,000                    
  current portion of operating lease liabilities7,879,000 7,746,000 6,804,000 4,209,000 3,996,000 3,942,000 3,906,000 3,719,000 3,133,000 2,991,000 3,003,000 3,183,000 3,315,000 3,279,000 2,982,000 2,862,000 3,237,000 3,702,000 3,357,000 3,639,000 3,481,000 3,481,000 3,175,000 3,090,000 2,737,000 2,560,000                    
  total current liabilities176,407,000 199,052,000 173,759,000 159,010,000 136,971,000 255,169,000 225,407,000 257,963,000 251,285,000 105,635,000 94,862,000 102,190,000 103,634,000 114,364,000 103,810,000 97,989,000 124,549,000 127,096,000 112,201,000 96,717,000 93,286,000 83,371,000 90,009,000 86,596,000 100,999,000 111,959,000 106,834,000 96,621,000 87,590,000 72,542,000 67,192,000 57,397,000 63,701,000 72,861,000 60,617,000 60,837,000 65,667,000 64,921,000 59,955,000 70,653,000 69,404,000 72,090,000 62,595,000 63,082,000 56,282,000 
  long-term reserve for income tax liabilities6,957,000 6,957,000 6,957,000 6,066,000 6,066,000 6,066,000 6,066,000 7,225,000 7,225,000 7,225,000 7,225,000 6,531,000 6,531,000 6,531,000 6,531,000 4,709,000 4,709,000 4,709,000 4,709,000 3,425,000 3,425,000 3,425,000 3,425,000 415,000 415,000 415,000 415,000 879,000 879,000 879,000 879,000 845,000 845,000 845,000 845,000 497,000 497,000 497,000 497,000 514,000 514,000 1,046,000    
  long-term debt, net of current portion and unamortized debt issuance costs607,727,000 603,858,000 601,630,000 596,446,000 586,853,000 594,006,000 589,579,000 638,206,000 488,280,000 72,872,000 72,839,000 74,011,000 73,871,000 74,348,000 74,776,000 75,552,000                              
  long-term operating lease liabilities, net of current portion38,964,000 40,705,000 41,881,000 28,941,000 29,483,000 28,739,000 29,721,000 30,199,000 24,407,000 23,994,000 23,694,000 24,366,000 24,680,000 25,489,000 24,703,000 25,466,000 24,555,000 16,464,000 17,464,000 17,534,000 14,530,000 15,230,000 16,315,000 16,940,000 17,754,000 11,174,000                    
  other long-term liabilities27,796,000 24,421,000 20,945,000 27,037,000 18,803,000 17,981,000 22,718,000 15,699,000 17,633,000 15,175,000 14,565,000 14,190,000 15,332,000 15,494,000 15,653,000 14,884,000 13,484,000 13,420,000 13,212,000 11,354,000 10,998,000 10,257,000 9,433,000 8,977,000 9,027,000 8,864,000 8,940,000 7,963,000 7,631,000 8,126,000 7,060,000 1,971,000 1,868,000 1,768,000 1,770,000 1,966,000 2,024,000 2,134,000 1,907,000 631,000 757,000     
  total liabilities857,851,000 874,993,000 845,172,000 817,500,000 778,176,000 901,961,000 873,491,000 949,493,000 789,031,000 225,079,000 213,329,000 221,530,000 224,412,000 236,713,000 226,007,000 221,501,000 198,522,000 194,778,000 182,513,000 162,756,000 157,621,000 149,458,000 159,443,000 151,983,000 169,013,000 164,452,000 149,204,000 139,372,000 131,120,000 122,678,000 117,336,000 107,111,000 110,683,000 110,051,000 98,483,000 100,384,000 101,122,000 98,421,000 94,626,000 111,241,000 113,664,000 117,221,000 107,510,000 118,013,000 109,527,000 
  commitments and contingencies                                             
  stockholders’ equity:                                             
  preferred stock: par value 0.0001; 20,000,000 shares authorized; no shares issued and outstanding                                             
  common stock: par value 0.0001; 300,000,000 shares authorized; 61,649,607 and 46,490,609 shares issued and outstanding, respectively, as of june 30, 2025 and 60,847,124 and 47,617,691 shares issued and outstanding, respectively, as of december 31, 20246,000                                             
  additional paid-in capital520,581,000 509,108,000 505,400,000 496,427,000 487,571,000 476,072,000 486,056,000 477,880,000 471,110,000 456,623,000 455,077,000 448,741,000 443,042,000 433,454,000 422,423,000 412,917,000 427,301,000 413,926,000 410,061,000 404,084,000 396,841,000 371,144,000 367,305,000 361,705,000 355,436,000 349,201,000 344,434,000 330,265,000 322,357,000 316,665,000 313,891,000 303,208,000 299,105,000 285,356,000 283,123,000 276,543,000 258,786,000 250,683,000 247,829,000 240,745,000 236,656,000 223,313,000 220,745,000 219,288,000 216,995,000 
  retained earnings625,102,000 594,071,000 568,787,000 530,823,000 490,394,000 452,445,000 409,268,000 373,102,000 323,880,000 297,755,000 271,723,000 237,810,000 221,936,000 204,590,000 180,337,000 160,577,000 130,581,000 122,814,000 117,773,000 124,046,000 120,127,000 120,319,000 116,370,000 117,396,000 116,086,000 68,299,000 67,485,000 65,618,000 66,780,000 69,570,000 76,235,000 74,767,000 74,592,000 72,620,000 70,855,000 73,597,000 69,707,000 62,812,000 60,323,000 52,790,000 55,798,000 62,445,000 63,110,000 65,631,000 71,010,000 
  accumulated other comprehensive loss-5,361,000 -7,969,000 -9,181,000 -8,821,000 -8,826,000 -8,769,000 -8,478,000 -8,411,000 -8,324,000 -8,268,000 -8,624,000 -9,931,000 -8,709,000 -7,245,000 -6,765,000 -6,277,000 -4,931,000 -5,642,000 -3,721,000 -4,478,000 -5,173,000 -5,461,000 -4,687,000 -5,848,000 -4,223,000 -4,126,000 -4,013,000 -3,576,000 -3,166,000 -910,000 -2,100,000 -2,595,000 -3,220,000 -4,230,000 -4,696,000 -2,581,000 -2,690,000 -2,039,000 -2,475,000 -3,760,000 -4,134,000 -4,647,000 -1,654,000 -1,803,000 -268,000 
  treasury stock-382,846,000 -343,933,000 -332,714,000 -290,757,000 -255,799,000 -247,398,000 -247,431,000 -247,437,000 -197,437,000 -197,539,000 -189,524,000 -171,461,000 -156,968,000 -151,280,000 -150,479,000 -137,047,000 -130,964,000 -125,546,000 -121,812,000 -118,425,000 -114,119,000 -108,493,000 -97,627,000 -83,853,000 -79,459,000 -78,393,000 -75,476,000 -72,896,000 -65,450,000 -58,226,000 -50,702,000 -44,730,000 -37,168,000 -28,190,000 -20,032,000 -19,111,000 -18,344,000 -14,876,000 -10,172,000 -5,994,000 -3,060,000 -1,834,000 -345,000   
  total equity757,482,000 751,283,000 732,298,000 727,678,000 713,346,000 672,356,000 639,421,000 595,140,000 589,235,000 548,577,000 528,658,000 505,165,000 499,307,000 479,525,000 445,522,000 430,176,000 467,223,000 450,960,000 448,723,000 450,962,000 442,437,000 423,373,000 427,528,000 433,653,000 432,288,000 380,266,000 364,359,000 341,270,000                  
  total liabilities and stockholders’ equity1,615,333,000 1,626,276,000 1,577,470,000 1,545,178,000 1,491,522,000 1,574,317,000 1,512,912,000 1,544,633,000 1,378,266,000 773,656,000 741,987,000 726,695,000 723,719,000 716,238,000 671,529,000 651,677,000 665,745,000 645,738,000 631,236,000 613,718,000 600,058,000 572,831,000 586,971,000 585,636,000 601,301,000 544,718,000 513,563,000 480,642,000 451,646,000 449,782,000 454,665,000 437,766,000 443,997,000 435,612,000 427,738,000 428,837,000 408,586,000 395,006,000 390,136,000 395,027,000 398,929,000 396,502,000 389,370,000 401,133,000 397,268,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 61,293,446 and 47,670,177 shares issued and outstanding, respectively, as of march 31, 2025 and 60,847,124 and 47,617,691 shares issued and outstanding, respectively, as of december 31, 2024 6,000                                            
  investment in unconsolidated affiliate      527,000 1,026,000 1,462,000 1,758,000 2,414,000 2,690,000 3,065,000 3,318,000 3,985,000                               
  accrued payments for baqsimi®     128,245,000 126,090,000                                       
  common stock: par value 0.0001; 300,000,000 shares authorized; 60,847,124 and 47,617,691 shares issued and outstanding, respectively, as of december 31, 2024 and 59,390,194 and 48,068,881 shares issued and outstanding, respectively, as of december 31, 2023  6,000                                           
  common stock: par value 0.0001; 300,000,000 shares authorized; 60,690,076 and 48,372,997 shares issued and outstanding, respectively, as of september 30, 2024 and 59,390,194 and 48,068,881 shares issued and outstanding, respectively, as of december 31, 2023   6,000                                          
  common stock: par value 0.0001; 300,000,000 shares authorized; 60,482,455 and 48,962,414 shares issued and outstanding, respectively, as of june 30, 2024 and 59,390,194 and 48,068,881 shares issued and outstanding, respectively, as of december 31, 2023    6,000                                         
  common stock: par value 0.0001; 300,000,000 shares authorized; 60,160,459 and 48,841,343 shares issued and outstanding as of march 31, 2024 and 59,390,194 and 48,068,881 shares issued and outstanding as of december 31, 2023, respectively     6,000                                        
  deferred tax liabilities       201,000 201,000 178,000 144,000 242,000 364,000 487,000 534,000 2,901,000 765,000 755,000 741,000 823,000 760,000 765,000 867,000 976,000 1,025,000 1,067,000 1,031,000 1,303,000 1,325,000 1,425,000 1,361,000 1,586,000 1,538,000 1,473,000 1,455,000        5,838,000  7,154,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 59,390,194 and 48,068,881 shares issued and outstanding as of december 31, 2023 and 58,110,231 and 48,112,069 shares issued and outstanding as of december 31, 2022, respectively      6,000                                       
  common stock: par value 0.0001; 300,000,000 shares authorized; 59,220,178 and 47,898,466 shares issued and outstanding as of september 30, 2023 and 58,110,231 and 48,112,069 shares issued and outstanding as of december 31, 2022, respectively       6,000                                      
  common stock: par value 0.0001; 300,000,000 shares authorized; 59,068,477 and 48,818,806 shares issued and outstanding as of june 30, 2023 and 58,110,231 and 48,112,069 shares issued and outstanding as of december 31, 2022, respectively        6,000                                     
  common stock: par value 0.0001; 300,000,000 shares authorized; 58,440,531 and 48,179,238 shares issued and outstanding as of march 31, 2023 and 58,110,231 and 48,112,069 shares issued and outstanding as of december 31, 2022, respectively         6,000                                    
  common stock: par value 0.0001; 300,000,000 shares authorized; 58,110,231 and 48,112,069 shares issued and outstanding as of december 31, 2022 and 56,440,202 and 47,714,912 shares issued and outstanding as of december 31, 2021, respectively          6,000                                   
  common stock: par value 0.0001; 300,000,000 shares authorized; 57,994,848 and 48,612,545 shares issued and outstanding as of september 30, 2022 and 56,440,202 and 47,714,912 shares issued and outstanding as of december 31, 2021, respectively           6,000                                  
  common stock: par value 0.0001; 300,000,000 shares authorized; 57,896,337 and 48,992,289 shares issued and outstanding as of june 30, 2022 and 56,440,202 and 47,714,912 shares issued and outstanding as of december 31, 2021, respectively            6,000                                 
  common stock: par value 0.0001; 300,000,000 shares authorized; 57,495,402 and 48,752,175 shares issued and outstanding as of march 31, 2022 and 56,440,202 and 47,714,912 shares issued and outstanding as of december 31, 2021, respectively             6,000                                
  common stock: par value 0.0001; 300,000,000 shares authorized; 56,440,202 and 47,714,912 shares issued and outstanding as of december 31, 2021 and 54,760,922 and 47,495,439 shares issued and outstanding as of december 31, 2020, respectively              6,000                               
  total amphastar pharmaceuticals, inc. stockholders’ equity              445,522,000 430,176,000 421,993,000 405,558,000 402,306,000 405,232,000 397,681,000 377,514,000 381,366,000 389,405,000 387,845,000 334,986,000 332,435,000 319,416,000                  
  non-controlling interests                45,230,000 45,402,000 46,417,000 45,730,000 44,756,000 45,859,000 46,162,000 44,248,000 44,443,000 45,280,000 31,924,000 21,854,000                  
  equity method investment               4,193,000                              
  common stock: par value 0.0001; 300,000,000 shares authorized; 56,051,662 and 47,982,690 shares issued and outstanding as of september 30, 2021 and 54,760,922 and 47,495,439 shares issued and outstanding as of december 31, 2020, respectively               6,000                              
  long-term debt, net of current portion                30,460,000 32,334,000 34,186,000 32,903,000 34,622,000 36,410,000 39,394,000 38,079,000 39,793,000 30,973,000                    
  common stock: par value 0.0001; 300,000,000 shares authorized; 55,736,209 and 47,983,549 shares issued and outstanding as of june 30, 2021 and 54,760,922 and 47,495,439 shares issued and outstanding as of december 31, 2020, respectively                6,000                             
  common stock: par value 0.0001; 300,000,000 shares authorized; 55,184,000 and 47,718,003 shares issued and outstanding as of march 31, 2021 and 54,760,922 and 47,495,439 shares issued and outstanding as of december 31, 2020, respectively                 6,000                            
  common stock: par value 0.0001; 300,000,000 shares authorized; 54,760,922 and 47,495,439 shares issued and outstanding as of december 31, 2020 and 52,495,483 and 46,576,968 shares issued and outstanding as of december 31, 2019, respectively                  5,000                           
  common stock: par value 0.0001; 300,000,000 shares authorized; 54,623,837 and 47,534,215 shares issued and outstanding as of september 30, 2020 and 52,495,483 and 46,576,968 shares issued and outstanding as of december 31, 2019, respectively                   5,000                          
  common stock: par value 0.0001; 300,000,000 shares authorized; 54,372,275 and 47,494,909 shares issued and outstanding as of june 30, 2020 and 52,495,483 and 46,576,968 shares issued and outstanding as of december 31, 2019, respectively                    5,000                         
  common stock: par value 0.0001; 300,000,000 shares authorized; 52,864,991 and 46,306,103 shares issued and outstanding as of march 31, 2020 and 52,495,483 and 46,576,968 shares issued and outstanding as of december 31, 2019, respectively                     5,000                        
  common stock: par value 0.0001; 300,000,000 shares authorized; 52,495,483 and 46,576,968 shares issued and outstanding as of december 31, 2019 and 51,438,675 and 46,631,118 shares issued and outstanding as of december 31, 2018, respectively                      5,000                       
  common stock: par value 0.0001; 300,000,000 shares authorized; 52,399,044 and 47,199,907 shares issued and outstanding as of september 30, 2019 and 51,438,675 and 46,631,118 shares issued and outstanding as of december 31, 2018, respectively                       5,000                      
  commitments and contingencies:                                             
  common stock: par value 0.0001; 300,000,000 shares authorized; 52,212,760 and 47,217,675 shares issued and outstanding as of june 30, 2019 and 51,438,675 and 46,631,118 shares issued and outstanding as of december 31, 2018, respectively                        5,000                     
  common stock: par value 0.0001; 300,000,000 shares authorized; 52,043,326 and 47,098,624 shares issued and outstanding as of march 31, 2019 and 51,438,675 and 46,631,118 shares issued and outstanding as of december 31, 2018, respectively                         5,000                    
  restricted cash and short-term investments                          4,155,000 4,155,000 4,155,000 4,155,000 4,155,000               
  current portion of long-term debt and capital leases                          18,229,000 18,592,000 18,891,000 6,061,000 6,312,000 6,212,000 6,205,000 5,263,000 5,366,000 8,541,000 10,904,000 11,177,000 10,934,000 14,762,000 12,632,000 12,531,000 7,594,000 10,078,000 10,665,000 
  long-term debt and capital leases, net of current portion                          31,984,000 32,606,000 33,695,000 39,706,000 40,844,000 42,232,000 40,107,000 31,148,000 32,356,000 34,163,000 31,742,000 29,092,000 30,165,000 31,354,000 34,798,000 35,886,000 36,106,000 41,271,000 42,850,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 51,438,675 and 46,631,118 shares issued and outstanding as of december 31, 2018 and 50,039,212 and 46,623,581 shares issued and outstanding as of december 31, 2017, respectively                          5,000                   
  common stock: par value 0.0001; 300,000,000 shares authorized; 50,883,467 and 46,159,652 shares issued and outstanding as of september 30, 2018 and 50,039,212 and 46,623,581 shares issued and outstanding as of december 31, 2017, respectively                           5,000                  
  common stock: par value 0.0001; 300,000,000 shares authorized; 50,661,676 and 46,416,789 shares issued and outstanding as of june 30, 2018 and 50,039,212 and 46,623,581 shares issued and outstanding as of december 31, 2017, respectively                            5,000                 
  total stockholders’ equity                            320,526,000 327,104,000 337,329,000 330,655,000 333,314,000 325,561,000 329,255,000 328,453,000 307,464,000 296,585,000 295,510,000 283,786,000 285,265,000 279,281,000 281,860,000 283,120,000 287,741,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 50,471,687 and 46,656,793 shares issued and outstanding as of march 31, 2018 and 50,039,212 and 46,623,581 shares issued and outstanding as of december 31, 2017, respectively                             5,000                
  common stock: par value 0.0001; 300,000,000 shares authorized; 50,039,212 and 46,623,581 shares issued and outstanding as of december 31, 2017 and 47,765,149 and 46,248,622 shares issued and outstanding as of december 31, 2016, respectively                              5,000               
  accounts payable                               9,590,000 14,910,000 19,302,000 16,196,000 13,439,000 18,767,000 18,619,000 13,872,000 12,265,000 18,447,000 18,948,000 10,161,000 10,013,000 17,764,000 
  accrued liabilities                               16,421,000 17,633,000 22,597,000 15,703,000 14,695,000 11,174,000 13,522,000 16,732,000 22,622,000 14,922,000 14,663,000 13,144,000 10,446,000 10,491,000 
  accrued payroll and related benefits                               17,344,000 15,776,000 15,533,000 13,847,000 15,553,000 14,992,000 15,428,000 12,840,000 15,711,000 14,211,000 13,864,000 11,449,000 11,863,000 10,846,000 
  current portion of product return accrual                               3,649,000 2,955,000 2,067,000 1,800,000 1,569,000 1,517,000 1,275,000 1,858,000 2,395,000 1,918,000 2,042,000 1,918,000 2,498,000 3,100,000 
  long-term product return accrual                               1,865,000 2,201,000 1,676,000 1,343,000 1,137,000 1,026,000 598,000 763,000 751,000 692,000 539,000 490,000 791,000 938,000 
  long-term deferred revenue                               1,215,000 423,000 280,000 97,000 168,000 166,000 1,179,000 1,339,000 1,500,000 1,661,000 1,821,000 1,982,000 2,143,000 2,303,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 48,991,134 and 45,896,393 shares issued and outstanding as of september 30, 2017 and 47,765,149 and 46,248,622 shares issued and outstanding as of december 31, 2016, respectively                               5,000              
  common stock: par value 0.0001; 300,000,000 shares authorized; 48,873,866 and 46,248,945 shares issued and outstanding as of june 30, 2017 and 47,765,149 and 46,248,622 shares issued and outstanding as of december 31, 2016, respectively                                5,000             
  common stock: par value 0.0001; 300,000,000 shares authorized; 48,003,777 and 45,958,244 shares issued and outstanding as of march 31, 2017 and 47,765,149 and 46,248,622 shares issued and outstanding as of december 31, 2016, respectively                                 5,000            
  current portion of deferred revenue                                   830,000 1,661,000 643,000 643,000 643,000 4,367,000 6,886,000 14,013,000 14,596,000 643,000 
  common stock: par value 0.0001; 300,000,000 shares authorized; 47,765,149 and 46,248,622 shares issued and outstanding as of december 31, 2016 and 45,960,206 and 45,198,491 shares issued and outstanding as of december 31, 2015, respectively                                  5,000           
  income tax refund and deposits                                   159,000 56,000 410,000 238,000 6,297,000 5,704,000 2,333,000 273,000 5,139,000 4,241,000 
  long-term deferred tax liabilities                                   1,616,000    5,838,000 5,838,000 5,839,000  10,726,000  
  common stock: par value 0.0001; 300,000,000 shares authorized; 47,506,416 and 46,038,022 shares issued and outstanding as of september 30, 2016 and 45,960,206 and 45,198,491 shares issued and outstanding as of december 31, 2015, respectively                                   5,000          
  restricted cash and restricted short-term investments                                    1,390,000 1,285,000 1,285,000 1,285,000 1,285,000 1,495,000 1,495,000 1,495,000 1,495,000 
  liabilities and equity                                             
  preferred stock: par value .0001; authorized shares—20,000,000; no shares issued and outstanding                                             
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—46,515,928 and 45,091,332 at june 30, 2016 and 45,960,206 and 45,198,491 at december 31, 2015, respectively                                    5,000         
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—46,100,797 and 44,942,101 at march 31, 2016 and 45,960,206 and 45,198,491 at december 31, 2015, respectively                                     5,000        
  current portion of deferred tax liabilities                                       161,000 159,000 156,000    
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—45,960,206 and 45,198,491 at december 31, 2015 and 44,676,167 and 44,646,767 at december 31, 2014, respectively                                      5,000       
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—45,206,511 and 44,646,767 at september 30, 2015 and december 31, 2014, respectively                                       5,000      
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—45,329,468 and 44,646,767 at june 30, 2015 and december 31, 2014, respectively                                        5,000     
  common stock: par value .0001; authorized shares—300,000,000; issued and outstanding shares—44,662,037 and 44,646,767 at march 31, 2015 and december 31, 2014, respectively                                         4,000    
  current portion of deferred tax liability                                          1,193,000   
  long-term reserve for income tax liability                                          499,000   
  preferred stock: par value .0001; authorized shares—20,000,000; none issued                                             
  common stock; par value .0001; authorized shares—300,000,000; issued and outstanding shares—44,646,767 and 38,765,940 at december 31, 2014 and december 31, 2013, respectively                                          4,000   
  deferred tax liability                                           797,000  
  common stock; par value .0001; authorized shares—300,000,000; issued and outstanding shares—44,645,437 and 38,765,940 at september 30, 2014 and december 31, 2013, respectively                                           4,000  
  common stock; par value .0001; authorized shares—300,000,000; issued and outstanding shares—44,635,940 and 38,765,940 at june 30, 2014 and december 31, 2013, respectively                                            4,000 

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