Amphastar Pharmaceuticals, Inc. (AMPH) stock
AMPHNasdaqPharmaceutical PreparationsFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 12/3030% below fair value
$29.37+0.50 (+1.73%)
Close on Nov 13, 2026Market cap $1.25BP/E 13.3Yield –
Price history
Amphastar Pharmaceuticals share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.
Close, Nov 13, 2026
$29.37
+1.73% on the day
52-week range
$16.65 – $31.00
-5.3% from the high
Change over 52 weeks
+11.4%
From $26.37 on Nov 13, 2025
Average volume
463,985
Shares a day, last 90 sessions
| Date | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Nov 13, 2026 | $29.05 | $29.73 | $28.84 | $29.37 | +1.73% | 380,762 |
| Nov 12, 2026 | $28.77 | $29.02 | $28.53 | $28.87 | +0.94% | 374,915 |
| Nov 11, 2026 | $28.87 | $29.30 | $28.50 | $28.60 | -1.58% | 497,666 |
| Nov 10, 2026 | $28.75 | $29.40 | $28.51 | $29.06 | -1.09% | 484,892 |
| Nov 9, 2026 | $28.74 | $29.70 | $28.50 | $29.38 | +3.12% | 635,804 |
| Nov 6, 2026 | $29.44 | $31.00 | $27.80 | $28.49 | +3.00% | 826,255 |
| Nov 5, 2026 | $28.31 | $29.21 | $27.43 | $27.66 | -1.28% | 607,331 |
| Nov 4, 2026 | $27.37 | $28.57 | $27.09 | $28.02 | +3.32% | 644,913 |
| Nov 3, 2026 | $27.04 | $27.39 | $26.85 | $27.12 | +0.33% | 550,213 |
| Nov 2, 2026 | $27.72 | $27.80 | $26.69 | $27.03 | -2.49% | 497,703 |
| Oct 30, 2026 | $27.12 | $27.80 | $26.76 | $27.72 | +2.93% | 664,507 |
| Oct 29, 2026 | $26.84 | $27.00 | $26.45 | $26.93 | +2.28% | 371,414 |
| Oct 28, 2026 | $25.36 | $26.36 | $25.36 | $26.33 | +2.97% | 397,267 |
| Oct 27, 2026 | $25.38 | $25.70 | $25.29 | $25.57 | +0.39% | 323,927 |
| Oct 26, 2026 | $25.27 | $25.65 | $25.22 | $25.47 | +1.31% | 225,242 |
| Oct 23, 2026 | $25.91 | $25.91 | $24.62 | $25.14 | -3.46% | 483,121 |
| Oct 22, 2026 | $26.25 | $26.50 | $25.92 | $26.04 | -0.61% | 315,091 |
| Oct 21, 2026 | $25.69 | $26.35 | $25.51 | $26.20 | +1.00% | 390,205 |
| Oct 20, 2026 | $26.24 | $26.61 | $25.82 | $25.94 | -0.77% | 361,336 |
| Oct 19, 2026 | $25.63 | $26.31 | $25.63 | $26.14 | +1.04% | 299,510 |
| Oct 16, 2026 | $26.61 | $26.61 | $25.52 | $25.87 | -2.08% | 352,084 |
| Oct 15, 2026 | $26.38 | $27.10 | $26.13 | $26.42 | +1.30% | 352,436 |
| Oct 14, 2026 | $25.89 | $26.57 | $25.89 | $26.08 | +0.12% | 364,655 |
| Oct 13, 2026 | $26.91 | $27.00 | $26.03 | $26.05 | -2.65% | 326,547 |
| Oct 12, 2026 | $26.62 | $26.86 | $26.51 | $26.76 | +0.53% | 362,818 |
| Oct 9, 2026 | $25.73 | $26.79 | $25.65 | $26.62 | +3.14% | 437,696 |
| Oct 8, 2026 | $25.39 | $26.14 | $25.10 | $25.81 | +1.06% | 423,536 |
| Oct 7, 2026 | $25.91 | $26.17 | $25.29 | $25.54 | -1.43% | 776,285 |
| Oct 6, 2026 | $25.54 | $26.13 | $25.03 | $25.91 | +2.13% | 469,146 |
| Oct 5, 2026 | $25.43 | $25.70 | $25.17 | $25.37 | -0.24% | 454,522 |
| Oct 2, 2026 | $25.46 | $25.55 | $25.06 | $25.43 | +0.32% | 374,220 |
| Oct 1, 2026 | $25.60 | $26.02 | $25.30 | $25.35 | -1.78% | 530,991 |
| Sep 30, 2026 | $26.73 | $26.79 | $25.77 | $25.81 | -3.26% | 509,363 |
| Sep 29, 2026 | $27.59 | $27.64 | $26.52 | $26.68 | -2.59% | 631,997 |
| Sep 28, 2026 | $25.99 | $27.80 | $25.96 | $27.39 | +4.82% | 751,801 |
| Sep 25, 2026 | $26.25 | $26.63 | $25.66 | $26.13 | -0.53% | 376,921 |
| Sep 24, 2026 | $24.81 | $26.31 | $24.65 | $26.27 | +5.25% | 572,080 |
| Sep 23, 2026 | $24.39 | $25.12 | $24.20 | $24.96 | +2.63% | 508,095 |
| Sep 22, 2026 | $24.60 | $24.83 | $24.00 | $24.32 | -0.65% | 522,394 |
| Sep 21, 2026 | $23.54 | $25.41 | $23.45 | $24.48 | +3.64% | 595,754 |
| Sep 18, 2026 | $23.69 | $23.99 | $23.51 | $23.62 | -0.84% | 1,455,803 |
| Sep 17, 2026 | $24.08 | $24.18 | $23.50 | $23.82 | -0.54% | 465,642 |
| Sep 16, 2026 | $23.64 | $24.39 | $23.49 | $23.95 | +1.31% | 503,880 |
| Sep 15, 2026 | $23.75 | $23.94 | $23.56 | $23.64 | -1.13% | 354,415 |
| Sep 14, 2026 | $23.84 | $24.28 | $23.56 | $23.91 | +0.55% | 474,878 |
| Sep 11, 2026 | $23.65 | $23.80 | $23.24 | $23.78 | +1.02% | 410,954 |
| Sep 10, 2026 | $23.00 | $23.69 | $22.76 | $23.54 | +2.17% | 514,990 |
| Sep 9, 2026 | $22.84 | $23.07 | $22.57 | $23.04 | +0.48% | 351,601 |
| Sep 8, 2026 | $22.82 | $23.14 | $22.30 | $22.93 | -1.08% | 460,015 |
| Sep 4, 2026 | $23.47 | $23.74 | $23.07 | $23.18 | -2.77% | 650,129 |
| Sep 3, 2026 | $23.88 | $23.92 | $23.04 | $23.84 | +0.42% | 469,751 |
| Sep 2, 2026 | $23.05 | $23.83 | $23.03 | $23.74 | +3.40% | 456,779 |
| Sep 1, 2026 | $22.59 | $23.05 | $22.59 | $22.96 | +1.91% | 550,979 |
| Aug 31, 2026 | $21.86 | $22.65 | $21.52 | $22.53 | +2.36% | 274,025 |
| Aug 28, 2026 | $21.88 | $22.15 | $21.69 | $22.01 | +0.59% | 224,533 |
| Aug 27, 2026 | $21.69 | $21.97 | $21.63 | $21.88 | -0.64% | 259,787 |
| Aug 26, 2026 | $21.86 | $22.44 | $21.72 | $22.02 | +0.18% | 395,610 |
| Aug 25, 2026 | $21.50 | $22.07 | $21.41 | $21.98 | +2.14% | 283,774 |
| Aug 24, 2026 | $21.60 | $21.81 | $21.26 | $21.52 | -0.37% | 210,263 |
| Aug 21, 2026 | $21.64 | $22.20 | $21.44 | $21.60 | -0.37% | 376,558 |
| Aug 20, 2026 | $21.38 | $21.76 | $21.24 | $21.68 | -0.28% | 338,697 |
| Aug 19, 2026 | $21.64 | $21.99 | $21.15 | $21.74 | +1.87% | 410,771 |
| Aug 18, 2026 | $21.11 | $21.59 | $21.08 | $21.34 | +2.30% | 411,880 |
| Aug 17, 2026 | $20.90 | $21.23 | $20.77 | $20.86 | -0.24% | 533,504 |
| Aug 14, 2026 | $20.02 | $21.07 | $19.89 | $20.91 | +3.62% | 305,681 |
| Aug 13, 2026 | $20.18 | $20.27 | $19.84 | $20.18 | +1.00% | 526,116 |
| Aug 12, 2026 | $20.16 | $20.22 | $19.61 | $19.98 | -2.15% | 343,843 |
| Aug 11, 2026 | $20.00 | $20.57 | $20.00 | $20.42 | +0.54% | 570,493 |
| Aug 10, 2026 | $20.74 | $20.90 | $19.55 | $20.31 | -2.26% | 645,749 |
| Aug 7, 2026 | $22.48 | $22.65 | $20.40 | $20.78 | +4.90% | 1,300,994 |
| Aug 6, 2026 | $20.22 | $20.25 | $19.60 | $19.81 | -2.12% | 527,333 |
| Aug 5, 2026 | $20.06 | $20.28 | $19.88 | $20.24 | +1.71% | 351,618 |
| Aug 4, 2026 | $20.11 | $20.38 | $19.86 | $19.90 | -1.58% | 481,648 |
| Aug 3, 2026 | $20.11 | $20.46 | $19.70 | $20.22 | +1.40% | 413,179 |
| Jul 31, 2026 | $20.35 | $20.41 | $19.67 | $19.94 | -2.16% | 367,629 |
| Jul 30, 2026 | $20.31 | $20.53 | $19.95 | $20.38 | -0.97% | 355,683 |
| Jul 29, 2026 | $20.24 | $20.70 | $19.99 | $20.58 | +2.13% | 321,673 |
| Jul 28, 2026 | $19.38 | $20.27 | $19.38 | $20.15 | +5.06% | 390,836 |
| Jul 27, 2026 | $18.97 | $19.31 | $18.96 | $19.18 | +2.46% | 285,919 |
| Jul 24, 2026 | $18.90 | $19.12 | $18.50 | $18.72 | -0.79% | 445,684 |
| Jul 23, 2026 | $19.08 | $19.34 | $18.73 | $18.87 | -2.23% | 650,430 |
| Jul 22, 2026 | $19.71 | $19.95 | $19.20 | $19.30 | -1.48% | 409,242 |
| Jul 21, 2026 | $19.42 | $19.89 | $19.42 | $19.59 | -0.20% | 621,073 |
| Jul 20, 2026 | $19.78 | $19.91 | $19.52 | $19.63 | -0.58% | 437,416 |
| Jul 17, 2026 | $19.84 | $20.35 | $19.63 | $19.75 | -0.58% | 338,457 |
| Jul 16, 2026 | $19.40 | $20.14 | $19.40 | $19.86 | +2.37% | 416,861 |
| Jul 15, 2026 | $18.87 | $19.50 | $18.83 | $19.40 | +3.16% | 356,089 |
| Jul 14, 2026 | $19.10 | $19.39 | $18.41 | $18.81 | -2.51% | 334,748 |
| Jul 13, 2026 | $19.00 | $19.68 | $18.95 | $19.29 | +3.04% | 384,539 |
| Jul 10, 2026 | $18.97 | $19.15 | $18.61 | $18.72 | -1.58% | 311,051 |
| Jul 9, 2026 | $18.86 | $19.13 | $18.61 | $19.02 | +0.74% | 446,628 |
| Jul 8, 2026 | $19.96 | $19.96 | $18.52 | $18.88 | -5.98% | 438,664 |
| Jul 7, 2026 | $20.06 | $20.28 | $19.74 | $20.08 | +2.40% | 449,984 |
| Jul 6, 2026 | $19.48 | $20.01 | $19.08 | $19.61 | -0.15% | 313,781 |
| Jul 2, 2026 | $20.35 | $20.35 | $19.63 | $19.64 | -2.29% | 315,753 |
| Jul 1, 2026 | $20.32 | $20.54 | $19.91 | $20.10 | -0.40% | 422,109 |
| Jun 30, 2026 | $20.71 | $20.71 | $19.86 | $20.18 | -2.56% | 400,207 |
| Jun 29, 2026 | $21.12 | $21.24 | $19.66 | $20.71 | -4.91% | 727,089 |
| Jun 26, 2026 | $21.01 | $21.81 | $20.88 | $21.78 | +3.52% | 623,977 |
| Jun 25, 2026 | $21.00 | $22.00 | $20.79 | $21.04 | +0.10% | 481,265 |
| Jun 24, 2026 | $19.77 | $21.09 | $19.77 | $21.02 | +7.63% | 701,214 |
| Jun 23, 2026 | $18.61 | $19.58 | $18.50 | $19.53 | +6.55% | 660,872 |
| Jun 22, 2026 | $18.80 | $18.90 | $18.22 | $18.33 | -2.55% | 767,439 |
| Jun 18, 2026 | $19.51 | $19.66 | $18.70 | $18.81 | -3.09% | 1,327,603 |
| Jun 17, 2026 | $19.94 | $20.26 | $19.15 | $19.41 | -2.76% | 1,008,517 |
| Jun 16, 2026 | $19.91 | $20.41 | $19.62 | $19.96 | +1.27% | 724,208 |
| Jun 15, 2026 | $20.11 | $20.29 | $19.59 | $19.71 | -1.89% | 528,512 |
| Jun 12, 2026 | $19.90 | $20.55 | $19.90 | $20.09 | -2.14% | 377,788 |
| Jun 11, 2026 | $20.15 | $20.65 | $20.10 | $20.53 | +1.18% | 463,562 |
| Jun 10, 2026 | $20.21 | $20.77 | $19.99 | $20.29 | +0.64% | 405,165 |
| Jun 9, 2026 | $19.53 | $20.27 | $19.53 | $20.16 | +3.97% | 506,256 |
| Jun 8, 2026 | $19.75 | $19.85 | $19.34 | $19.39 | -1.77% | 558,989 |
| Jun 5, 2026 | $18.86 | $20.14 | $18.85 | $19.74 | +5.56% | 750,284 |
| Jun 4, 2026 | $18.28 | $18.90 | $18.28 | $18.70 | +3.20% | 459,231 |
| Jun 3, 2026 | $18.26 | $18.36 | $17.73 | $18.12 | -1.79% | 509,338 |
| Jun 2, 2026 | $18.36 | $18.67 | $18.10 | $18.45 | +0.16% | 810,643 |
| Jun 1, 2026 | $18.63 | $19.01 | $18.22 | $18.42 | -2.28% | 569,685 |
| May 29, 2026 | $19.28 | $19.46 | $18.55 | $18.85 | -2.33% | 849,067 |
| May 28, 2026 | $19.04 | $19.55 | $19.02 | $19.30 | +1.05% | 621,218 |
| May 27, 2026 | $19.31 | $19.34 | $18.50 | $19.10 | +1.54% | 501,594 |
| May 26, 2026 | $18.45 | $19.12 | $18.45 | $18.81 | +2.17% | 670,766 |
| May 22, 2026 | $18.25 | $18.44 | $17.93 | $18.41 | +1.38% | 485,197 |
| May 21, 2026 | $18.07 | $18.37 | $17.76 | $18.16 | +0.44% | 1,656,978 |
| May 20, 2026 | $17.81 | $18.19 | $17.70 | $18.08 | +1.46% | 868,756 |
| May 19, 2026 | $17.28 | $17.91 | $17.00 | $17.82 | +3.60% | 725,146 |
| May 18, 2026 | $16.70 | $17.31 | $16.65 | $17.20 | +1.96% | 866,027 |
| May 15, 2026 | $17.27 | $17.53 | $16.76 | $16.87 | -2.49% | 679,289 |
| May 14, 2026 | $17.81 | $18.08 | $17.26 | $17.30 | -5.57% | 739,074 |
| May 13, 2026 | $17.50 | $18.57 | $17.43 | $18.32 | +4.69% | 971,189 |
| May 12, 2026 | $18.41 | $18.58 | $17.26 | $17.50 | -5.15% | 1,219,603 |
| May 11, 2026 | $19.13 | $19.41 | $18.33 | $18.45 | -2.89% | 1,359,763 |
| May 8, 2026 | $18.58 | $19.53 | $18.28 | $19.00 | -20.93% | 1,983,804 |
| May 7, 2026 | $24.01 | $24.35 | $23.87 | $24.03 | +0.54% | 373,521 |
| May 6, 2026 | $23.50 | $24.15 | $23.50 | $23.90 | +2.18% | 392,763 |
| May 5, 2026 | $22.85 | $23.46 | $22.75 | $23.39 | +2.86% | 366,945 |
| May 4, 2026 | $21.82 | $23.22 | $21.72 | $22.74 | +3.93% | 487,139 |
| May 1, 2026 | $21.98 | $22.26 | $21.64 | $21.88 | -0.36% | 353,190 |
| Apr 30, 2026 | $21.63 | $22.36 | $21.57 | $21.96 | +1.53% | 407,242 |
| Apr 29, 2026 | $21.50 | $21.86 | $21.48 | $21.63 | -0.87% | 268,688 |
| Apr 28, 2026 | $21.71 | $22.04 | $21.56 | $21.82 | +0.79% | 281,225 |
| Apr 27, 2026 | $21.47 | $22.06 | $21.46 | $21.65 | +1.12% | 329,613 |
| Apr 24, 2026 | $21.05 | $21.60 | $20.77 | $21.41 | +1.90% | 429,703 |
| Apr 23, 2026 | $20.99 | $21.23 | $20.77 | $21.01 | +0.10% | 302,590 |
| Apr 22, 2026 | $21.40 | $21.59 | $20.77 | $20.99 | -1.04% | 410,802 |
| Apr 21, 2026 | $22.38 | $22.66 | $21.10 | $21.21 | -7.46% | 684,196 |
| Apr 20, 2026 | $22.67 | $23.26 | $22.54 | $22.92 | +0.17% | 542,349 |
| Apr 17, 2026 | $22.18 | $23.00 | $21.98 | $22.88 | +4.91% | 537,832 |
| Apr 16, 2026 | $21.67 | $22.02 | $21.41 | $21.81 | +0.60% | 361,313 |
| Apr 15, 2026 | $21.38 | $21.76 | $21.19 | $21.68 | +1.40% | 389,357 |
| Apr 14, 2026 | $21.36 | $21.70 | $21.12 | $21.38 | +0.09% | 343,451 |
| Apr 13, 2026 | $20.17 | $21.48 | $20.17 | $21.36 | +4.86% | 577,873 |
| Apr 10, 2026 | $20.98 | $21.10 | $20.14 | $20.37 | -2.40% | 354,467 |
| Apr 9, 2026 | $20.32 | $21.19 | $20.32 | $20.87 | +2.30% | 519,316 |
| Apr 8, 2026 | $20.68 | $21.07 | $20.18 | $20.40 | -0.87% | 613,466 |
| Apr 7, 2026 | $20.39 | $20.81 | $20.26 | $20.58 | 0.00% | 351,463 |
| Apr 6, 2026 | $20.45 | $20.73 | $20.04 | $20.58 | +0.64% | 344,067 |
| Apr 2, 2026 | $19.95 | $20.66 | $19.88 | $20.45 | +1.04% | 390,454 |
| Apr 1, 2026 | $19.74 | $20.31 | $19.68 | $20.24 | +3.32% | 677,388 |
| Mar 31, 2026 | $19.53 | $20.00 | $19.27 | $19.59 | +1.93% | 534,427 |
| Mar 30, 2026 | $19.15 | $19.67 | $19.07 | $19.22 | +1.10% | 410,715 |
| Mar 27, 2026 | $19.37 | $19.64 | $18.92 | $19.01 | -2.66% | 346,015 |
| Mar 26, 2026 | $19.50 | $19.80 | $18.98 | $19.53 | -0.20% | 363,470 |
| Mar 25, 2026 | $19.45 | $19.96 | $19.39 | $19.57 | +1.77% | 317,563 |
| Mar 24, 2026 | $19.10 | $19.57 | $18.98 | $19.23 | 0.00% | 367,780 |
| Mar 23, 2026 | $20.04 | $20.08 | $19.23 | $19.23 | -1.38% | 414,859 |
| Mar 20, 2026 | $19.56 | $19.76 | $19.15 | $19.50 | -0.20% | 1,133,239 |
| Mar 19, 2026 | $19.10 | $19.82 | $19.06 | $19.54 | +2.84% | 583,123 |
| Mar 18, 2026 | $19.21 | $19.47 | $18.97 | $19.00 | -2.61% | 650,426 |
| Mar 17, 2026 | $19.48 | $20.00 | $19.48 | $19.51 | +0.52% | 635,572 |
| Mar 16, 2026 | $18.93 | $19.46 | $18.65 | $19.41 | +6.77% | 737,990 |
| Mar 13, 2026 | $18.23 | $18.46 | $17.81 | $18.18 | +0.03% | 604,648 |
| Mar 12, 2026 | $18.58 | $18.58 | $17.03 | $18.18 | -3.17% | 901,683 |
| Mar 11, 2026 | $18.91 | $19.50 | $18.52 | $18.77 | -0.74% | 548,285 |
| Mar 10, 2026 | $19.21 | $19.57 | $18.84 | $18.91 | -1.56% | 527,204 |
| Mar 9, 2026 | $18.97 | $19.37 | $18.52 | $19.21 | -0.67% | 687,763 |
| Mar 6, 2026 | $20.05 | $20.08 | $18.94 | $19.34 | -5.38% | 753,758 |
| Mar 5, 2026 | $19.67 | $20.60 | $19.54 | $20.44 | +2.40% | 726,358 |
| Mar 4, 2026 | $19.97 | $20.20 | $19.56 | $19.96 | +0.66% | 594,999 |
| Mar 3, 2026 | $20.35 | $21.07 | $19.81 | $19.83 | -5.62% | 740,834 |
| Mar 2, 2026 | $20.30 | $21.14 | $19.95 | $21.01 | +3.86% | 1,261,290 |
| Feb 27, 2026 | $22.44 | $23.27 | $19.83 | $20.23 | -23.63% | 1,965,786 |
| Feb 26, 2026 | $28.00 | $28.17 | $26.27 | $26.49 | -5.29% | 816,455 |
| Feb 25, 2026 | $27.73 | $27.99 | $27.03 | $27.97 | +1.08% | 415,986 |
| Feb 24, 2026 | $27.65 | $28.37 | $27.42 | $27.67 | +0.44% | 478,146 |
| Feb 23, 2026 | $28.42 | $28.75 | $27.19 | $27.55 | -3.43% | 496,697 |
| Feb 20, 2026 | $28.58 | $28.98 | $28.03 | $28.53 | -0.04% | 508,412 |
| Feb 19, 2026 | $28.56 | $28.71 | $28.42 | $28.54 | -0.42% | 340,673 |
| Feb 18, 2026 | $28.45 | $29.16 | $28.36 | $28.66 | +0.74% | 325,939 |
| Feb 17, 2026 | $28.65 | $29.23 | $28.39 | $28.45 | -0.18% | 316,867 |
| Feb 13, 2026 | $27.82 | $29.00 | $27.76 | $28.50 | +3.45% | 268,689 |
| Feb 12, 2026 | $28.62 | $28.62 | $27.24 | $27.55 | -3.64% | 437,541 |
| Feb 11, 2026 | $28.62 | $29.09 | $28.48 | $28.59 | +0.07% | 236,616 |
| Feb 10, 2026 | $28.75 | $28.92 | $28.49 | $28.57 | -0.14% | 182,574 |
| Feb 9, 2026 | $29.08 | $29.20 | $28.37 | $28.61 | -2.22% | 285,022 |
| Feb 6, 2026 | $28.61 | $29.46 | $28.61 | $29.26 | +2.20% | 343,842 |
| Feb 5, 2026 | $28.45 | $29.22 | $28.45 | $28.63 | +0.07% | 288,034 |
| Feb 4, 2026 | $28.79 | $29.37 | $28.56 | $28.61 | +1.31% | 378,851 |
| Feb 3, 2026 | $27.57 | $28.28 | $27.06 | $28.24 | +1.15% | 506,290 |
| Feb 2, 2026 | $26.36 | $28.13 | $26.34 | $27.92 | +5.40% | 444,060 |
| Jan 30, 2026 | $26.15 | $26.60 | $26.04 | $26.49 | +1.30% | 294,470 |
| Jan 29, 2026 | $26.10 | $26.43 | $25.80 | $26.15 | +0.11% | 184,370 |
| Jan 28, 2026 | $26.45 | $26.45 | $25.86 | $26.12 | -0.50% | 209,032 |
| Jan 27, 2026 | $26.39 | $26.58 | $25.81 | $26.25 | -1.32% | 264,507 |
| Jan 26, 2026 | $25.92 | $26.71 | $25.63 | $26.60 | +2.62% | 316,150 |
| Jan 23, 2026 | $26.03 | $26.37 | $25.81 | $25.92 | -0.86% | 269,462 |
| Jan 22, 2026 | $26.25 | $26.92 | $26.10 | $26.15 | -0.29% | 233,271 |
| Jan 21, 2026 | $25.96 | $26.59 | $25.93 | $26.22 | +1.04% | 251,623 |
| Jan 20, 2026 | $25.62 | $26.75 | $25.47 | $25.95 | -0.46% | 282,605 |
| Jan 16, 2026 | $25.94 | $26.23 | $25.42 | $26.07 | +0.27% | 286,949 |
| Jan 15, 2026 | $27.65 | $27.69 | $25.94 | $26.00 | -6.34% | 584,060 |
| Jan 14, 2026 | $28.80 | $29.20 | $27.61 | $27.76 | -3.98% | 472,419 |
| Jan 13, 2026 | $29.16 | $29.38 | $28.40 | $28.91 | -1.67% | 345,642 |
| Jan 12, 2026 | $28.05 | $29.52 | $27.31 | $29.40 | +5.98% | 455,860 |
| Jan 9, 2026 | $27.71 | $28.02 | $27.43 | $27.74 | 0.00% | 247,216 |
| Jan 8, 2026 | $27.40 | $28.34 | $27.23 | $27.74 | +1.50% | 304,492 |
| Jan 7, 2026 | $27.83 | $28.28 | $27.15 | $27.33 | -1.05% | 342,796 |
| Jan 6, 2026 | $26.53 | $27.75 | $26.51 | $27.62 | +3.37% | 300,067 |
| Jan 5, 2026 | $26.21 | $27.45 | $26.11 | $26.72 | +0.98% | 419,181 |
| Jan 2, 2026 | $26.91 | $26.93 | $26.02 | $26.46 | -1.19% | 405,969 |
| Dec 31, 2025 | $27.06 | $27.06 | $26.64 | $26.78 | -0.81% | 218,279 |
| Dec 30, 2025 | $26.75 | $27.16 | $26.73 | $27.00 | +0.78% | 251,521 |
| Dec 29, 2025 | $27.00 | $27.23 | $26.77 | $26.79 | -1.22% | 220,491 |
| Dec 26, 2025 | $26.77 | $27.17 | $26.55 | $27.12 | +1.16% | 229,035 |
| Dec 24, 2025 | $26.45 | $27.12 | $26.44 | $26.81 | +1.36% | 175,168 |
| Dec 23, 2025 | $27.24 | $27.26 | $26.26 | $26.45 | -3.18% | 333,344 |
| Dec 22, 2025 | $26.50 | $27.44 | $26.35 | $27.32 | +2.71% | 507,332 |
| Dec 19, 2025 | $26.40 | $26.80 | $26.33 | $26.60 | +0.38% | 812,109 |
| Dec 18, 2025 | $26.04 | $26.62 | $25.92 | $26.50 | +1.65% | 340,800 |
| Dec 17, 2025 | $25.60 | $26.52 | $25.47 | $26.07 | +1.80% | 389,864 |
| Dec 16, 2025 | $26.18 | $26.31 | $25.16 | $25.61 | -2.66% | 499,486 |
| Dec 15, 2025 | $25.78 | $26.50 | $25.56 | $26.31 | +4.12% | 472,896 |
| Dec 12, 2025 | $26.13 | $26.13 | $25.20 | $25.27 | -2.43% | 341,410 |
| Dec 11, 2025 | $25.81 | $25.94 | $25.47 | $25.90 | +0.74% | 284,940 |
| Dec 10, 2025 | $25.64 | $25.91 | $25.22 | $25.71 | +0.23% | 483,522 |
| Dec 9, 2025 | $25.97 | $26.39 | $25.56 | $25.65 | -1.38% | 414,104 |
| Dec 8, 2025 | $26.81 | $26.85 | $25.95 | $26.01 | -2.84% | 300,935 |
| Dec 5, 2025 | $27.15 | $27.47 | $26.69 | $26.77 | -1.40% | 323,533 |
| Dec 4, 2025 | $27.58 | $27.84 | $26.97 | $27.15 | -1.56% | 404,953 |
| Dec 3, 2025 | $26.86 | $27.82 | $26.75 | $27.58 | +3.41% | 317,346 |
| Dec 2, 2025 | $27.46 | $27.62 | $26.23 | $26.67 | -2.84% | 456,357 |
| Dec 1, 2025 | $27.44 | $27.82 | $27.30 | $27.45 | -0.90% | 355,915 |
| Nov 28, 2025 | $27.47 | $27.78 | $27.37 | $27.70 | +1.24% | 208,313 |
| Nov 26, 2025 | $27.44 | $27.83 | $27.23 | $27.36 | -1.19% | 410,857 |
| Nov 25, 2025 | $27.00 | $27.76 | $26.90 | $27.69 | +3.67% | 375,514 |
| Nov 24, 2025 | $25.96 | $26.79 | $25.82 | $26.71 | +2.69% | 349,465 |
| Nov 21, 2025 | $25.45 | $26.53 | $25.40 | $26.01 | +2.56% | 392,921 |
| Nov 20, 2025 | $25.54 | $26.01 | $24.92 | $25.36 | -0.04% | 355,832 |
| Nov 19, 2025 | $25.81 | $26.28 | $25.13 | $25.37 | -2.05% | 524,386 |
| Nov 18, 2025 | $25.82 | $26.57 | $25.39 | $25.90 | -0.46% | 484,851 |
| Nov 17, 2025 | $26.04 | $26.54 | $25.69 | $26.02 | -0.15% | 417,693 |
| Nov 14, 2025 | $26.15 | $26.47 | $25.90 | $26.06 | -1.18% | 294,122 |
| Nov 13, 2025 | $27.66 | $27.86 | $26.00 | $26.37 | -5.25% | 488,815 |
| Nov 12, 2025 | $27.16 | $29.00 | $27.12 | $27.83 | +2.47% | 685,779 |
| Nov 11, 2025 | $26.00 | $27.21 | $26.00 | $27.16 | +3.98% | 541,178 |
| Nov 10, 2025 | $24.03 | $26.83 | $23.81 | $26.12 | +8.70% | 826,318 |
| Nov 7, 2025 | $26.15 | $27.40 | $23.67 | $24.03 | -0.83% | 809,392 |
| Nov 6, 2025 | $25.41 | $25.53 | $24.15 | $24.23 | -4.27% | 767,419 |
| Nov 5, 2025 | $25.07 | $25.65 | $25.07 | $25.31 | +0.20% | 335,208 |
| Nov 4, 2025 | $25.20 | $25.40 | $24.93 | $25.26 | -0.16% | 416,494 |
| Nov 3, 2025 | $25.30 | $25.85 | $24.90 | $25.30 | – | 361,693 |
Seasonality
AMPH return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | -2.9% | -4.6% | 1.9% | 0.5% | 2.6% | 5.2% | 1.2% | 4.7% | -2.8% | 1.0% | 5.0% | 0.5% |
| Months up | 2 of 10 | 3 of 10 | 5 of 10 | 5 of 10 | 7 of 10 | 6 of 10 | 5 of 10 | 6 of 10 | 3 of 10 | 5 of 10 | 7 of 10 | 3 of 9 |
| 2026 | -1.1% | -23.6% | -3.2% | 12.1% | -14.2% | 7.1% | -1.2% | 13.0% | 14.6% | 7.4% | 6.0% | |
| 2025 | -6.1% | -18.5% | 2.0% | -15.8% | 5.3% | -10.7% | -8.8% | 46.2% | -13.0% | -4.3% | 8.6% | -3.3% |
| 2024 | -13.7% | -12.7% | -5.7% | -6.1% | 2.6% | -5.5% | 8.8% | 12.0% | -0.4% | 4.1% | -10.6% | -17.8% |
| 2023 | 8.0% | 5.3% | 17.7% | -4.6% | 24.0% | 29.5% | 5.6% | -12.2% | -13.7% | -1.6% | 24.4% | 9.8% |
| 2022 | -0.9% | 20.0% | 29.6% | -1.2% | 4.7% | -6.3% | 7.5% | -20.8% | -5.1% | 10.0% | -4.6% | -5.0% |
| 2021 | -9.6% | -3.6% | 4.5% | -5.0% | 8.7% | 6.6% | 3.9% | -6.2% | -3.3% | -1.7% | 4.7% | 19.1% |
| 2020 | -2.0% | -18.6% | -3.6% | 14.2% | 10.0% | 20.5% | -10.9% | 1.8% | -8.0% | 4.5% | -9.3% | 13.2% |
| 2019 | 14.4% | 9.2% | -17.8% | 5.7% | -10.8% | 9.7% | -4.5% | 11.5% | -11.7% | -2.6% | 1.0% | -1.1% |
| 2018 | -3.1% | -1.5% | 2.1% | 1.8% | -17.2% | -3.4% | 14.4% | 8.8% | 1.4% | -6.7% | 21.0% | -8.4% |
| 2017 | -14.5% | -1.8% | -6.3% | 4.1% | 13.0% | 4.6% | -3.2% | -7.3% | 11.6% | 1.1% | 8.4% | -1.8% |
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