Amphastar Pharmaceuticals (AMPH) Stock Analysis & Price (Updated Oct 16, 2026, 4:00 PM ET)
Updated Oct 16, 2026, 4:00 PM ET
- Closed at $25.87, -2.08% vs the prior close of $26.42.
- Volume 351.98K shares, 0.7x its 50-day average.
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
AMPH dips 2.1% to $25.87. Closed at $25.87, -2.08% vs the prior close of $26.42. Day range $25.51–$26.61, opened at $26.61.
AMPH daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 16, 2026 — AMPH dips 2.1% to $25.87
- Closed at $25.87, -2.08% vs the prior close of $26.42. Day range $25.51–$26.61, opened at $26.61.
- Volume was 351.98K shares, 0.7x its 50-day average of 487.89K.
- Price is +9.2% vs its 50-day average ($23.70) and +15.9% vs its 200-day average ($22.32).
- 52-week range $16.65–$29.52; today's close sits at 72% of that range, 12.4% below the 52-week high.
Oct 15, 2026 — AMPH rises 1.3% to $26.42
- Closed at $26.42, +1.30% vs the prior close of $26.08. Day range $26.13–$27.10, opened at $26.38.
- Volume was 352.30K shares, 0.7x its 50-day average of 487.87K.
- Price is +12.1% vs its 50-day average ($23.58) and +18.3% vs its 200-day average ($22.33).
- 52-week range $16.65–$29.52; today's close sits at 76% of that range, 10.5% below the 52-week high.
Oct 14, 2026 — AMPH ends flat (+0.1%) to $26.08
- Closed at $26.08, +0.12% vs the prior close of $26.05. Day range $25.89–$26.57, opened at $25.89.
- Volume was 364.70K shares, 0.7x its 50-day average of 490.21K.
- Price is +11.2% vs its 50-day average ($23.45) and +16.8% vs its 200-day average ($22.33).
- 52-week range $16.65–$29.52; today's close sits at 73% of that range, 11.7% below the 52-week high.
Oct 13, 2026 — AMPH dips 2.7% to $26.05
- Closed at $26.05, -2.65% vs the prior close of $26.76. Day range $26.03–$27.00, opened at $26.91.
- Volume was 326.50K shares, 0.7x its 50-day average of 491.95K.
- Price is +11.7% vs its 50-day average ($23.33) and +16.6% vs its 200-day average ($22.33).
- 52-week range $16.65–$29.52; today's close sits at 73% of that range, 11.8% below the 52-week high.
Oct 12, 2026 — AMPH rises 0.5% to $26.76, 3 up days in a row
- Closed at $26.76, +0.53% vs the prior close of $26.62. Day range $26.51–$26.86, opened at $26.62.
- Volume was 362.80K shares, 0.7x its 50-day average of 492.04K.
- Price is +15.3% vs its 50-day average ($23.21) and +19.8% vs its 200-day average ($22.34).
- 52-week range $16.65–$29.52; today's close sits at 79% of that range, 9.3% below the 52-week high.
- That makes 3 straight gains.
Oct 9, 2026 — AMPH jumps 3.1% to $26.62
- Closed at $26.62, +3.14% vs the prior close of $25.81. Day range $25.65–$26.79, opened at $25.73.
- Volume was 437.70K shares, 0.9x its 50-day average of 490.40K.
- Price is +15.4% vs its 50-day average ($23.08) and +19.2% vs its 200-day average ($22.34).
- 52-week range $16.65–$29.52; today's close sits at 77% of that range, 9.8% below the 52-week high.
Oct 8, 2026 — AMPH rises 1.1% to $25.81
- Closed at $25.81, +1.06% vs the prior close of $25.54. Day range $25.10–$26.14, opened at $25.39.
- Volume was 423.50K shares, 0.9x its 50-day average of 488.37K.
- Price is +12.4% vs its 50-day average ($22.95) and +15.5% vs its 200-day average ($22.34).
- 52-week range $16.65–$29.52; today's close sits at 71% of that range, 12.6% below the 52-week high.
Oct 7, 2026 — AMPH dips 1.4% to $25.54
- Closed at $25.54, -1.43% vs the prior close of $25.91. Day range $25.29–$26.17, opened at $25.91.
- Volume was 776.30K shares, 1.6x its 50-day average of 480.66K.
- Price is +11.8% vs its 50-day average ($22.85) and +14.3% vs its 200-day average ($22.34).
- 52-week range $16.65–$29.52; today's close sits at 69% of that range, 13.5% below the 52-week high.
Oct 6, 2026 — AMPH rises 2.1% to $25.91
- Closed at $25.91, +2.13% vs the prior close of $25.37. Day range $25.03–$26.13, opened at $25.54.
- Volume was 469.10K shares, 1.0x its 50-day average of 476.99K.
- Price is +13.9% vs its 50-day average ($22.74) and +15.9% vs its 200-day average ($22.35).
- 52-week range $16.65–$29.52; today's close sits at 72% of that range, 12.2% below the 52-week high.
Oct 5, 2026 — AMPH ends flat (-0.2%) to $25.37
- Closed at $25.37, -0.24% vs the prior close of $25.43. Day range $25.17–$25.70, opened at $25.43.
- Volume was 454.50K shares, 1.0x its 50-day average of 476.82K.
- Price is +12.2% vs its 50-day average ($22.61) and +13.5% vs its 200-day average ($22.35).
- 52-week range $16.65–$29.52; today's close sits at 68% of that range, 14.1% below the 52-week high.
Oct 2, 2026 — AMPH rises 0.3% to $25.43
- Closed at $25.43, +0.32% vs the prior close of $25.35. Day range $25.06–$25.55, opened at $25.46.
- Volume was 374.20K shares, 0.8x its 50-day average of 482.34K.
- Price is +13.2% vs its 50-day average ($22.47) and +13.8% vs its 200-day average ($22.35).
- 52-week range $16.65–$29.52; today's close sits at 68% of that range, 13.9% below the 52-week high.
AMPH latest news & SEC filings
Every SEC filing by or about AMPH in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Sep 23, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Peters William J sold 4,139 shares at $25.00 (≈$103.47K) on Sep 21, 2026; now holds 168,707
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 21, 2026 · Form 144 — Planned insider sale
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Sep 17, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Zhou Rong converted options/RSUs into 10,000 shares at $13.35 (≈$133.50K) on Sep 16, 2026; now holds 179,203
- Zhou Rong sold 10,000 shares at $23.94 (≈$239.40K) on Sep 16, 2026; now holds 169,203
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 3, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Zhou Rong sold 3,187 shares at $23.63 (≈$75.31K) on Sep 2, 2026
- Zhou Rong sold 3,187 shares at $23.63 (≈$75.31K) on Sep 2, 2026
- Zhou Rong sold 3,187 shares at $23.63 (≈$75.31K) on Sep 2, 2026
- Zhou Rong sold 3,187 shares at $23.63 (≈$75.31K) on Sep 2, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 1, 2026 · Form 144 — Planned insider sale
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 18, 2026 · Form 144 — Planned insider sale
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 6, 2026 · Form 10-Q — Quarterly report
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $183.90M (prior year $174.41M) (+5.4% vs Jun 30, 2025)
- Net income: $30.35M (prior year $31.03M) (-2.2% vs Jun 30, 2025)
- Diluted EPS: $0.67 (prior year $0.64) (+4.7% vs Jun 30, 2025)
Aug 6, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Jul 14, 2026 · Form SCHEDULE 13G — Passive stake (13G)
Passive stake (13G) — an investor reported owning more than 5%
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Jul 13, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.02 — Change in directors or officers (appointment, departure or pay).
Jul 8, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 8.01 — Reported other events the company considers important.
Things to know before you trade AMPH
- Last results release: Aug 6, 2026 (8-K Item 2.02). Previous ones: May 7, 2026, Feb 26, 2026, Nov 6, 2025. Based on that rhythm, the next report is likely around Nov 5, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 2.01% (largest 5.2%).
- Liquidity: about 484.46K shares (≈$12.53M) trade per day on average.
- 52-week position: $25.87 vs a range of $16.65–$29.52 (72% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 25 sales; latest: William J Peters sold 4,139 shares on Sep 21, 2026.
- Latest filings: 10-Q Aug 6, 2026; 8-K Aug 6, 2026; 8-K Jul 13, 2026.
- Share count: 42.54M shares outstanding (Jul 31, 2026), -8.5% vs a year earlier — the company has been reducing its share count.
- Listing: Nasdaq · industry: Pharmaceutical Preparations.
AMPH market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 16, 2026 | 26.61 | 26.61 | 25.51 | 25.87 | 351.98K |
| Oct 15, 2026 | 26.38 | 27.10 | 26.13 | 26.42 | 352.30K |
| Oct 14, 2026 | 25.89 | 26.57 | 25.89 | 26.08 | 364.70K |
| Oct 13, 2026 | 26.91 | 27.00 | 26.03 | 26.05 | 326.50K |
| Oct 12, 2026 | 26.62 | 26.86 | 26.51 | 26.76 | 362.80K |
| Oct 9, 2026 | 25.73 | 26.79 | 25.65 | 26.62 | 437.70K |
| Oct 8, 2026 | 25.39 | 26.14 | 25.10 | 25.81 | 423.50K |
| Oct 7, 2026 | 25.91 | 26.17 | 25.29 | 25.54 | 776.30K |
| Oct 6, 2026 | 25.54 | 26.13 | 25.03 | 25.91 | 469.10K |
| Oct 5, 2026 | 25.43 | 25.70 | 25.17 | 25.37 | 454.50K |
| Oct 2, 2026 | 25.46 | 25.55 | 25.06 | 25.43 | 374.20K |
| Oct 1, 2026 | 25.60 | 26.02 | 25.30 | 25.35 | 531.00K |
| Sep 30, 2026 | 26.73 | 26.79 | 25.77 | 25.81 | 509.40K |
| Sep 29, 2026 | 27.59 | 27.64 | 26.52 | 26.68 | 632.00K |
| Sep 28, 2026 | 25.99 | 27.80 | 25.96 | 27.39 | 747.90K |
| Sep 25, 2026 | 26.25 | 26.63 | 25.66 | 26.13 | 376.90K |
| Sep 24, 2026 | 24.81 | 26.31 | 24.65 | 26.27 | 572.10K |
| Sep 23, 2026 | 24.39 | 25.12 | 24.20 | 24.96 | 508.10K |
| Sep 22, 2026 | 24.60 | 24.83 | 24.00 | 24.32 | 522.40K |
| Sep 21, 2026 | 23.54 | 25.41 | 23.45 | 24.48 | 595.80K |
About Amphastar Pharmaceuticals
Amphastar Pharmaceuticals (AMPH) is listed on the Nasdaq and classified by the SEC under “Pharmaceutical Preparations”. Its business address is in RANCHO CUCAMONGA, CA. Fiscal year ends December 31. SEC CIK 1297184.
AMPH board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Gayle Deflin | Director | Jun 3, 2026 |
| David Russell Gaugh | Director | Jun 3, 2026 |
| Diane G. Gerst | Director | Jun 3, 2026 |
| Howard Lee | Director | Jun 3, 2026 |
| Yakob Liawatidewi | EVP CORP ADMIN CENTER | Mar 17, 2026 |
| Mary Z. Luo | COO, Chief Scientist, Chairman | Mar 17, 2026 |
| William J Peters | CFO, EVP & TREASURER | Sep 23, 2026 |
| Richard K Prins | Director | Aug 12, 2026 |
| Floyd F. Petersen | Director | Dec 15, 2025 |
| Anthony T Pierce | Director | Jul 13, 2026 |
| Michael A Zasloff | Director | Jun 3, 2026 |
| Jack Y. Zhang | CEO & CHIEF SCIENTIFIC OFFICER | Mar 17, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Yakob Liawatidewi | EVP CORP ADMIN CENTER | Mar 17, 2026 |
| Mary Z. Luo | COO, Chief Scientist, Chairman | Mar 17, 2026 |
| William J Peters | CFO, EVP & TREASURER | Sep 23, 2026 |
| Jack Y. Zhang | CEO & CHIEF SCIENTIFIC OFFICER | Mar 17, 2026 |
| Rong Zhou | SENIOR EVP, PRODUCTION CENTER | Sep 17, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Sep 21, 2026 | William J Peters | Sale | 4,139 | $25.00 |
| Sep 21, 2026 | William J Peters | Sale | 4,139 | $25.00 |
| Sep 21, 2026 | William J Peters | Sale | 4,139 | $25.00 |
| Sep 21, 2026 | William J Peters | Sale | 4,139 | $25.00 |
| Sep 16, 2026 | Rong Zhou | Sale | 10,000 | $23.94 |
| Sep 16, 2026 | Rong Zhou | Sale | 10,000 | $23.94 |
| Sep 16, 2026 | Rong Zhou | Sale | 10,000 | $23.94 |
| Sep 16, 2026 | Rong Zhou | Sale | 10,000 | $23.94 |
| Sep 2, 2026 | Rong Zhou | Sale | 3,187 | $23.63 |
| Sep 2, 2026 | Rong Zhou | Sale | 3,187 | $23.63 |
| Sep 2, 2026 | Rong Zhou | Sale | 3,187 | $23.63 |
| Sep 2, 2026 | Rong Zhou | Sale | 3,187 | $23.63 |
| Aug 11, 2026 | Richard K Prins | Sale | 7,973 | $20.30 |
| Aug 11, 2026 | Richard K Prins | Sale | 7,973 | $20.30 |
| Aug 11, 2026 | Richard K Prins | Sale | 7,973 | $20.30 |
AMPH financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $719.89M | $98.09M | 2.03 | $156.12M |
| Dec 31, 2024 | $731.97M | $159.52M | 3.06 | $213.39M |
| Dec 31, 2023 | $644.39M | $137.54M | 2.60 | $183.50M |
| Dec 31, 2022 | $498.99M | $91.39M | 1.74 | $89.18M |
| Dec 31, 2021 | $437.77M | $62.12M | 1.25 | $97.99M |
Latest balance sheet: total assets $1.74B, total liabilities $975.61M, cash $223.61M (as of Jun 30, 2026).
AMPH earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 6, 2026 | 8-K Item 2.02 (results) | $19.81 |
| May 7, 2026 | 8-K Item 2.02 (results) | $24.03 |
| Feb 26, 2026 | 8-K Item 2.02 (results) | $26.49 |
| Nov 6, 2025 | 8-K Item 2.02 (results) | $24.23 |
| Aug 7, 2025 | 8-K Item 2.02 (results) | $21.62 |
| May 7, 2025 | 8-K Item 2.02 (results) | $24.43 |
| Feb 27, 2025 | 8-K Item 2.02 (results) | $31.49 |
| Nov 6, 2024 | 8-K Item 2.02 (results) | $53.40 |
| Aug 7, 2024 | 8-K Item 2.02 (results) | — |
| May 8, 2024 | 8-K Item 2.02 (results) | — |
| Feb 28, 2024 | 8-K Item 2.02 (results) | — |
| Nov 8, 2023 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 16, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.