MKS Inc. (MKSI)
NASDAQ: MKSI · Real-Time Price · USD
266.02
+7.64 (2.96%)
At close: Sep 29, 2026, 4:00 PM EDT
266.07
+0.05 (0.02%)
After-hours: Sep 29, 2026, 5:34 PM EDT
MKS Inc. Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 29, 2026 | 264.18 | 266.28 | 261.36 | 266.02 | 266.02 | 2.96% | 806,694 |
| Sep 28, 2026 | 259.56 | 259.69 | 251.19 | 258.38 | 258.38 | -0.94% | 1,094,785 |
| Sep 25, 2026 | 261.01 | 262.66 | 257.90 | 260.82 | 260.82 | 1.10% | 683,189 |
| Sep 24, 2026 | 256.64 | 259.82 | 254.21 | 257.98 | 257.98 | -1.80% | 695,212 |
| Sep 23, 2026 | 260.37 | 263.78 | 253.41 | 262.72 | 262.72 | 0.90% | 1,534,322 |
| Sep 22, 2026 | 253.50 | 260.66 | 252.60 | 260.37 | 260.37 | 1.34% | 2,709,586 |
| Sep 21, 2026 | 258.20 | 259.00 | 251.79 | 256.92 | 256.92 | 1.92% | 948,161 |
| Sep 18, 2026 | 244.03 | 252.38 | 243.00 | 252.08 | 252.08 | 4.93% | 2,231,364 |
| Sep 17, 2026 | 245.50 | 250.84 | 238.45 | 240.23 | 240.23 | 2.10% | 1,026,777 |
| Sep 16, 2026 | 237.80 | 240.48 | 232.03 | 235.28 | 235.28 | 1.63% | 960,065 |
| Sep 15, 2026 | 242.60 | 242.60 | 228.46 | 231.50 | 231.50 | -3.25% | 1,632,355 |
| Sep 14, 2026 | 248.32 | 250.49 | 238.29 | 239.27 | 239.27 | -10.49% | 1,175,742 |
| Sep 11, 2026 | 267.86 | 270.29 | 264.74 | 267.31 | 267.31 | 2.09% | 1,247,889 |
| Sep 10, 2026 | 260.83 | 265.60 | 258.79 | 261.84 | 261.84 | -2.32% | 961,346 |
| Sep 9, 2026 | 262.34 | 269.78 | 262.34 | 268.05 | 268.05 | 0.96% | 1,201,869 |
| Sep 8, 2026 | 264.06 | 270.17 | 260.35 | 265.50 | 265.50 | 1.99% | 1,752,638 |
| Sep 4, 2026 | 255.14 | 260.94 | 253.97 | 260.31 | 260.31 | 4.27% | 1,689,425 |
| Sep 3, 2026 | 247.10 | 250.78 | 241.51 | 249.65 | 249.65 | -0.69% | 1,137,004 |
| Sep 2, 2026 | 247.30 | 252.98 | 245.90 | 251.38 | 251.38 | 2.00% | 1,089,962 |
| Sep 1, 2026 | 250.96 | 252.09 | 243.72 | 246.44 | 246.44 | -3.82% | 1,644,232 |
| Aug 31, 2026 | 258.38 | 259.38 | 254.48 | 256.24 | 256.24 | 0.19% | 977,647 |
| Aug 28, 2026 | 268.08 | 269.36 | 255.14 | 255.76 | 255.76 | -5.62% | 1,407,551 |
| Aug 27, 2026 | 279.03 | 282.56 | 268.44 | 270.99 | 270.99 | -0.28% | 792,101 |
| Aug 26, 2026 | 270.12 | 275.17 | 266.52 | 271.75 | 271.75 | 0.47% | 1,703,554 |
| Aug 25, 2026 | 274.93 | 274.93 | 266.25 | 270.48 | 270.48 | 0.62% | 1,157,627 |
| Aug 24, 2026 | 271.50 | 274.00 | 264.54 | 269.06 | 268.81 | -3.60% | 1,884,336 |
| Aug 21, 2026 | 282.60 | 285.47 | 274.88 | 279.11 | 278.85 | -0.98% | 928,026 |
| Aug 20, 2026 | 280.91 | 284.54 | 274.31 | 281.88 | 281.62 | 0.10% | 1,113,251 |
| Aug 19, 2026 | 304.16 | 304.16 | 278.23 | 281.60 | 281.34 | -6.21% | 1,535,867 |
| Aug 18, 2026 | 303.87 | 309.14 | 294.68 | 300.24 | 299.96 | -6.39% | 1,426,296 |
| Aug 17, 2026 | 315.42 | 325.24 | 313.11 | 320.74 | 320.44 | 3.22% | 1,172,574 |
| Aug 14, 2026 | 302.01 | 312.08 | 302.01 | 310.73 | 310.44 | 1.45% | 1,178,613 |
| Aug 13, 2026 | 306.99 | 316.39 | 305.56 | 306.29 | 306.01 | -0.18% | 946,846 |
| Aug 12, 2026 | 312.90 | 317.00 | 305.55 | 306.83 | 306.54 | 4.23% | 1,210,822 |
| Aug 11, 2026 | 299.03 | 300.72 | 290.76 | 294.38 | 294.11 | 0.69% | 698,759 |
| Aug 10, 2026 | 304.92 | 309.84 | 292.09 | 292.35 | 292.08 | -4.14% | 1,068,534 |
| Aug 7, 2026 | 301.18 | 310.43 | 298.00 | 304.99 | 304.71 | 4.70% | 1,269,658 |
| Aug 6, 2026 | 291.02 | 309.67 | 285.58 | 291.31 | 291.04 | -6.96% | 2,840,272 |
| Aug 5, 2026 | 319.23 | 329.35 | 311.86 | 313.10 | 312.81 | -2.39% | 2,366,180 |
| Aug 4, 2026 | 327.27 | 329.34 | 320.45 | 320.76 | 320.46 | 3.48% | 2,892,303 |
| Aug 3, 2026 | 288.31 | 313.46 | 288.31 | 309.98 | 309.69 | 4.21% | 1,404,670 |
| Jul 31, 2026 | 310.00 | 314.69 | 294.15 | 297.45 | 297.17 | 1.41% | 1,143,074 |
| Jul 30, 2026 | 288.80 | 297.57 | 284.78 | 293.30 | 293.03 | 13.85% | 3,027,600 |
| Jul 29, 2026 | 280.97 | 290.51 | 256.16 | 257.61 | 257.37 | -9.71% | 2,510,384 |
| Jul 28, 2026 | 296.31 | 296.91 | 277.01 | 285.31 | 285.04 | -9.63% | 1,990,201 |
| Jul 27, 2026 | 330.15 | 334.00 | 298.38 | 315.70 | 315.41 | -4.10% | 1,391,385 |
| Jul 24, 2026 | 341.09 | 345.13 | 326.08 | 329.18 | 328.87 | -4.67% | 849,716 |
| Jul 23, 2026 | 338.49 | 348.43 | 336.74 | 345.30 | 344.98 | 0.13% | 752,096 |
| Jul 22, 2026 | 330.74 | 349.02 | 328.43 | 344.84 | 344.52 | -0.17% | 801,307 |
| Jul 21, 2026 | 347.28 | 347.45 | 333.72 | 345.44 | 345.12 | 6.53% | 1,106,515 |