NASDAQ · TECHNOLOGY · Historical Data
Axcelis Technologies Inc historical OHLCV data.
Daily ACLS open, high, low, close, and volume bars. Split-adjusted closes by default; return, range, and realised volatility are computed from the same series.
Section freshness
Price Jun 12, 7:56 PM EDT · Statements Mar 30, 8:00 PM EDT
Source timingDetailsHide
Data freshness
Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.
Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.
- 1-year return
- +166.41%
- First close → last close
- Range high
- $183.62
- Range low
- $64.17
- Realised vol (annualised)
- 58%
- σ of daily log returns × √252
Trend read
Trading near the 52-week high.
ACLS sits in the top 3% of its 52-week range. Stocks holding above the upper band of their range tend to attract trend-followers; the cleanest signal here is whether realised vol is rising with price (continuation) or compressing (consolidation).
Last 30 sessions
| Date | High | Low | Close | Return | Volume |
|---|---|---|---|---|---|
| 2026-06-12 | $183.62 | $172.50 | $180.12 | +3.77% | 641,307 |
| 2026-06-11 | $174.02 | $160.06 | $173.57 | +10.25% | 695,870 |
| 2026-06-10 | $172.00 | $154.06 | $157.43 | -4.34% | 822,186 |
| 2026-06-09 | $182.19 | $157.84 | $164.57 | +6.34% | 1,247,955 |
| 2026-06-08 | $160.35 | $151.73 | $154.76 | +5.16% | 520,893 |
| 2026-06-05 | $159.26 | $147.05 | $147.16 | -9.09% | 442,016 |
| 2026-06-04 | $167.51 | $151.23 | $161.87 | +1.68% | 719,758 |
| 2026-06-03 | $162.00 | $156.55 | $159.19 | +0.26% | 450,504 |
| 2026-06-02 | $159.03 | $152.84 | $158.78 | +5.56% | 272,315 |
| 2026-06-01 | $151.22 | $145.25 | $150.42 | +0.01% | 417,445 |
| 2026-05-29 | $157.81 | $149.28 | $150.41 | -3.30% | 518,060 |
| 2026-05-28 | $158.23 | $151.88 | $155.55 | -1.49% | 318,727 |
| 2026-05-27 | $167.01 | $157.72 | $157.91 | -3.87% | 540,072 |
| 2026-05-26 | $164.96 | $157.24 | $164.27 | +4.67% | 478,952 |
| 2026-05-22 | $158.98 | $151.82 | $156.94 | +2.90% | 477,373 |
| 2026-05-21 | $155.07 | $147.91 | $152.51 | +1.97% | 349,810 |
| 2026-05-20 | $151.36 | $144.66 | $149.56 | +4.42% | 386,073 |
| 2026-05-19 | $144.40 | $137.84 | $143.23 | -2.06% | 640,445 |
| 2026-05-18 | $155.61 | $143.09 | $146.24 | -5.76% | 609,014 |
| 2026-05-15 | $157.22 | $152.59 | $155.18 | -4.00% | 556,391 |
| 2026-05-14 | $165.46 | $160.00 | $161.64 | -0.31% | 393,553 |
| 2026-05-13 | $167.65 | $158.36 | $162.15 | +0.32% | 573,042 |
| 2026-05-12 | $163.06 | $153.02 | $161.64 | -2.08% | 751,722 |
| 2026-05-11 | $168.14 | $160.45 | $165.08 | +1.26% | 639,246 |
| 2026-05-08 | $164.69 | $149.19 | $163.03 | +2.75% | 1,033,547 |
| 2026-05-07 | $169.00 | $157.09 | $158.66 | -7.22% | 1,421,698 |
| 2026-05-06 | $171.61 | $156.43 | $171.00 | +22.41% | 1,884,647 |
| 2026-05-05 | $145.42 | $138.75 | $139.70 | -1.53% | 1,017,941 |
| 2026-05-04 | $143.55 | $138.33 | $141.87 | +1.34% | 446,069 |
| 2026-05-01 | $140.66 | $136.98 | $139.99 | +0.63% | 320,590 |
Showing the most recent 30 sessions. Total 255 bars available.
Frequently asked
Common questions.
Are ACLS historical prices split-adjusted on TECHi?
Yes — TECHi applies universal split adjustment across the entire history (including the IPO close and all-time high/low calculations). This is why long-term CAGR and performance numbers stay accurate instead of showing the bogus pre-split prices you sometimes see elsewhere.
How does TECHi calculate total return and realized volatility for ACLS?
Total return columns back out actual dividend reinvestment. Realized vol is annualised 30-day rolling log-return stdev × √252. These documented series power Forward model inputs and historical validation checks.
Why does ACLS historical data on TECHi look different from other sites around splits or dividends?
Many platforms serve unadjusted or partially adjusted series that break long-term charts and CAGR. TECHi normalises the full history once using the verified split list, then derives every derived metric (CAGR, all-time high/low, progress windows) from that single source of truth.
Can I export ACLS historical data for backtesting?
The page renders the full OHLCV table with return and total-return columns. Export buttons (CSV) are available on the companion financial statements pages; the same disciplined data layer underlies everything.
How far back does the ACLS history go?
TECHi defaults to one year of daily bars for speed. The underlying feed reaches to Axcelis Technologies Inc’s IPO. MAX on the Chart page loads the complete adjusted series for long-horizon analysis.