MKS Inc. (MKSI)
NASDAQ: MKSI · Real-Time Price · USD
281.60
-18.64 (-6.21%)
At close: Aug 19, 2026, 4:00 PM EDT
282.80
+1.20 (0.43%)
Pre-market: Aug 20, 2026, 9:06 AM EDT
MKS Inc. Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Aug 19, 2026 | 304.16 | 304.16 | 278.23 | 281.60 | 281.60 | -6.21% | 1,535,792 |
| Aug 18, 2026 | 303.87 | 309.14 | 294.68 | 300.24 | 300.24 | -6.39% | 1,327,454 |
| Aug 17, 2026 | 315.42 | 325.24 | 313.11 | 320.74 | 320.74 | 3.22% | 1,120,975 |
| Aug 14, 2026 | 302.01 | 312.08 | 302.01 | 310.73 | 310.73 | 1.45% | 1,083,437 |
| Aug 13, 2026 | 306.99 | 316.39 | 305.56 | 306.29 | 306.29 | -0.18% | 944,886 |
| Aug 12, 2026 | 312.90 | 317.00 | 305.55 | 306.83 | 306.83 | 4.23% | 1,204,701 |
| Aug 11, 2026 | 299.03 | 300.72 | 290.76 | 294.38 | 294.38 | 0.69% | 698,567 |
| Aug 10, 2026 | 304.92 | 309.84 | 292.09 | 292.35 | 292.35 | -4.14% | 986,623 |
| Aug 7, 2026 | 301.18 | 310.43 | 298.00 | 304.99 | 304.99 | 4.70% | 1,224,043 |
| Aug 6, 2026 | 291.02 | 309.67 | 285.58 | 291.31 | 291.31 | -6.96% | 2,808,114 |
| Aug 5, 2026 | 319.23 | 329.35 | 311.86 | 313.10 | 313.10 | -2.39% | 2,309,554 |
| Aug 4, 2026 | 327.27 | 329.34 | 320.45 | 320.76 | 320.76 | 3.48% | 2,890,691 |
| Aug 3, 2026 | 288.31 | 313.46 | 288.31 | 309.98 | 309.98 | 4.21% | 1,398,471 |
| Jul 31, 2026 | 310.00 | 314.69 | 294.15 | 297.45 | 297.45 | 1.41% | 1,142,162 |
| Jul 30, 2026 | 288.80 | 297.57 | 284.78 | 293.30 | 293.30 | 13.85% | 3,020,035 |
| Jul 29, 2026 | 280.97 | 290.51 | 256.16 | 257.61 | 257.61 | -9.71% | 2,506,261 |
| Jul 28, 2026 | 296.31 | 296.91 | 277.01 | 285.31 | 285.31 | -9.63% | 1,980,095 |
| Jul 27, 2026 | 330.15 | 334.00 | 298.38 | 315.70 | 315.70 | -4.10% | 1,390,314 |
| Jul 24, 2026 | 341.09 | 345.13 | 326.08 | 329.18 | 329.18 | -4.67% | 848,255 |
| Jul 23, 2026 | 338.49 | 348.43 | 336.74 | 345.30 | 345.30 | 0.13% | 749,472 |
| Jul 22, 2026 | 330.74 | 349.02 | 328.43 | 344.84 | 344.84 | -0.17% | 798,854 |
| Jul 21, 2026 | 347.28 | 347.45 | 333.72 | 345.44 | 345.44 | 6.53% | 1,106,267 |
| Jul 20, 2026 | 330.88 | 338.98 | 322.75 | 324.28 | 324.28 | -0.13% | 811,787 |
| Jul 17, 2026 | 315.02 | 330.61 | 307.10 | 324.69 | 324.69 | -2.20% | 1,891,859 |
| Jul 16, 2026 | 336.12 | 349.07 | 327.38 | 332.00 | 332.00 | -6.16% | 1,110,589 |
| Jul 15, 2026 | 366.49 | 374.12 | 336.76 | 353.80 | 353.80 | -1.29% | 1,402,572 |
| Jul 14, 2026 | 373.21 | 373.21 | 353.20 | 358.43 | 358.43 | 1.82% | 826,487 |
| Jul 13, 2026 | 352.51 | 358.48 | 346.07 | 352.03 | 352.03 | -4.49% | 849,532 |
| Jul 10, 2026 | 357.94 | 371.44 | 355.00 | 368.58 | 368.58 | -0.05% | 832,201 |
| Jul 9, 2026 | 370.14 | 380.50 | 366.27 | 368.78 | 368.78 | 5.55% | 1,247,787 |
| Jul 8, 2026 | 341.50 | 358.21 | 341.50 | 349.39 | 349.39 | -0.05% | 1,224,498 |
| Jul 7, 2026 | 342.86 | 353.00 | 329.01 | 349.57 | 349.57 | -5.02% | 1,833,870 |
| Jul 6, 2026 | 375.84 | 385.58 | 364.67 | 368.06 | 368.06 | 0.68% | 1,274,112 |
| Jul 2, 2026 | 408.00 | 408.92 | 355.08 | 365.56 | 365.56 | -11.07% | 2,165,817 |
| Jul 1, 2026 | 424.61 | 428.97 | 406.68 | 411.05 | 411.05 | -7.59% | 1,536,042 |
| Jun 30, 2026 | 425.78 | 447.62 | 418.48 | 444.80 | 444.80 | 6.92% | 2,230,535 |
| Jun 29, 2026 | 393.18 | 419.95 | 384.74 | 416.00 | 416.00 | 7.05% | 2,105,903 |
| Jun 26, 2026 | 394.14 | 401.05 | 385.00 | 388.61 | 388.61 | -5.29% | 2,025,794 |
| Jun 25, 2026 | 408.00 | 414.64 | 383.38 | 410.31 | 410.31 | 7.52% | 2,437,821 |
| Jun 24, 2026 | 390.54 | 395.75 | 376.83 | 381.62 | 381.62 | -1.94% | 1,804,663 |
| Jun 23, 2026 | 388.69 | 394.47 | 382.56 | 389.17 | 389.17 | -7.46% | 1,641,092 |
| Jun 22, 2026 | 413.50 | 421.58 | 407.00 | 420.56 | 420.56 | 3.49% | 1,547,005 |
| Jun 18, 2026 | 386.56 | 408.87 | 382.00 | 406.37 | 406.37 | 9.46% | 2,127,039 |
| Jun 17, 2026 | 383.99 | 386.01 | 369.85 | 371.26 | 371.26 | 1.35% | 1,196,916 |
| Jun 16, 2026 | 375.00 | 379.99 | 365.36 | 366.31 | 366.31 | -2.40% | 1,090,149 |
| Jun 15, 2026 | 367.88 | 377.66 | 367.88 | 375.32 | 375.32 | 5.52% | 915,164 |
| Jun 12, 2026 | 345.32 | 359.35 | 341.45 | 355.69 | 355.69 | 3.00% | 961,425 |
| Jun 11, 2026 | 326.74 | 347.27 | 326.10 | 345.32 | 345.32 | 9.25% | 1,005,552 |
| Jun 10, 2026 | 317.42 | 333.69 | 310.36 | 316.07 | 316.07 | -1.52% | 1,270,123 |
| Jun 9, 2026 | 320.44 | 332.01 | 298.00 | 320.96 | 320.96 | 2.84% | 1,205,404 |