Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

Amphastar Pharmaceuticals In (AMPH)

209 + Investors. Track Smart Money conviction in AMPH. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↓ -21
Streak
6Q ▼
Buyers last Q
41%

Smart Money Signals — AMPH

Based on 209 hedge funds · latest filing: 2026 Q1 · updated quarterly

📉

Selling streak — 6 quarters in a row

last 6Q
For 6 consecutive quarters, more hedge funds reduced or closed their AMPH positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.
📊

High ownership — 77% of 3.0Y peak

77% of all-time peak
209 funds currently hold this stock — 77% of the 3.0-year high of 272 funds (reached 2024 Q3). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.
📉

Outflows — 13% fewer funds vs a year ago

fund count last 6Q
32 fewer hedge funds hold AMPH compared to a year ago (-13% decline). When institutions consistently reduce their exposure, it's worth exploring the underlying fundamental reasons driving them away.
🟠

More sellers than buyers — 41% buying

98 buying140 selling
Last quarter: 140 funds reduced or exited vs 98 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.
➡️

Steady new buyers — ~29 new funds per quarter

new funds entering per quarter
Funds opening this position for the first time: 42 → 35 → 26 → 29. A stable flow of new institutional buyers suggests ongoing interest without signs of either acceleration or slowdown.
🔒

60% of holders stayed for 2+ years

■ 60% conviction (2yr+) ■ 26% medium ■ 14% new
125 out of 209 hedge funds have held AMPH for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
💎

Buying through price weakness — shares -4%, value -32%

Value
-32%
Shares
-4%
Last quarter: funds added -4% more shares while total portfolio value only changed -32%. Institutions were buying while the price was falling — a high-conviction accumulation signal. They're deliberately loading up on the dip.
📊

Peak discovery — momentum slowing

35 → 42 → 35 → 26 → 29 new funds/Q
New funds entering each quarter: 42 → 35 → 26 → 29. AMPH is well-known in the hedge fund world, but fresh entries are gradually declining. The explosive phase of institutional discovery is likely behind us.
🏛️

Veteran-anchored — 65% veterans vs 20% newcomers

■ 65% veterans ■ 15% 1-2yr ■ 20% new
Entry-cohort mix of 211 holders: 137 (65%) are 2+ year veterans, 31 entered 1–2 years ago, and 43 (20%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.
🏆

Elite ownership — 43% AUM from top-100 funds

43% from top-100 AUM funds
49 of 209 holders are among the 100 largest funds by AUM, controlling 43% of total institutional value in AMPH. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
2.6
out of 10
Low Exit Risk
Exit risk score 2.6/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — AMPH

In 2026 Q1, 98 hedge funds were net buyers of AMPH (29 opened a new position, 69 added to an existing one), while 140 reduced or exited (90 trimmed, 50 sold completely) — a 41% buyer ratio, indicating roughly balanced activity. This extends a 6-quarter selling streak, suggesting sustained institutional caution. 43% of total institutional value in AMPH is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: -21 funds (more exits than new entries). Total institutional holders: 209.

Hedge Fund Ownership: AMPH

How many hedge funds hold AMPH — quarterly history vs. share price
Quarterly hedge fund ownership of AMPH vs. share price

Market Analysis: AMPH

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: AMPH

-- --

Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Is It Too Late to Buy Amphastar Pharmaceuticals In (AMPH) Based on Hedge Fund 13F Filings?

Signal Freshness measures how much AMPH has moved relative to its sector benchmark (XLV) since the 2026 Q1 13F filing. A stock that has barely outrun its sector is still a relatively fresh entry point — the fund's thesis has not yet been priced in by the broader market.

Since Quarter End March 31, 2026 · 75d ago
AMPH
+2.6%
XLV
+4.9%

AMPH outperformed XLV by -2.3% since March 31, 2026.

Since 13F Filing Date May 15, 2026 · 30d ago
AMPH
+19.1%
XLV
+6.0%

Since the filing became public, AMPH outperformed XLV by +13.1% .

Interpretation: The stock has meaningfully outrun its sector. The trade has partially played out; entry is at a premium to the fund's implied reference. Learn more →

Smart Money Signal ?
Limited Smart Money Interest

No strong consensus or elite conviction detected among institutional holders.

22 top-rated funds 0 high-conviction
Consensus
5.9
/ 10
breadth
×
Elite
0.6
/ 10
conviction
Hedge Fund Positioning: AMPH
209 + Investors

Track Smart Money conviction in AMPH. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2026 Q1) Prior (2025 Q4) Change
Funds Holding 209 230 -9.13%
13F Shares 32M 33M -4.21%
Total Value $606M $892M -32.08%
New Positions 29 26 +3
Increased Positions 67 90 -23
Closed Positions 50 33 +17
Reduced Positions 90 86 +4
Total Calls 2 2 -
Total Puts 0 0 -
PUT/CALL Ratio 0.0 0.0 Bullish

Statistics: AMPH

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Valuation Measures Data as of: --

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PEG Ratio (5yr expected) --
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Price/Book (mrq) --
Enterprise Value/Revenue --
Enterprise Value/EBITDA --
Beta (5Y Monthly) --
Short Ratio (Days to Cover) --
Short % of Float --

Financial Highlights

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Total Cash (mrq) --
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Institutional Holders (2026 Q1)

209 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in AMPH. Verified SEC 13F-HR filings.

QUARTER:
Top 25 AMPH holders by conviction (% of portfolio weight) — 2026 Q1 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Bridge City Capital, LLC 1.82% 335,105 $6.6M
2 Lam Group, INC. 1.41% 130,800 $2.6M
3 Denali Advisors LLC 0.58% 266,465 $5.2M
4 Illumine Investment Management, LLC 0.42% 28,078 $550K
5 SummerHaven Investment Management, LLC 0.39% 32,633 $639K
6 nVerses Capital, LLC 0.31% 17,685 $346K
7 Hussman Strategic Advisors, INC. 0.27% 63,000 $1.2M
8 Rice Hall James & Associates, LLC 0.20% 187,348 $3.7M
9 Systematic Financial Management LP 0.20% 452,898 $8.9M
10 Boston Trust Walden Corp 0.15% 944,789 $18.5M
11 Quantedge Capital Pte Ltd 0.14% 13,500 $264K
12 Bridgeway Capital Management, LLC 0.13% 330,457 $6.5M
13 Corient IA LLC 0.12% 6,670 $131K
14 Epoch Investment Partners, Inc. 0.11% 898,895 $17.6M
15 Fuller & Thaler Asset Management, INC. 0.09% 1,395,139 $27.3M
16 Royce & Associates LP 0.08% 406,175 $8.0M
17 Polaris Capital Management, LLC 0.07% 43,232 $847K
18 Round Rock Advisors LLC 0.06% 20,495 $401K
19 Advisory Research Inc 0.06% 25,335 $496K
20 Legato Capital Management LLC 0.06% 34,135 $669K
21 Advisor OS, LLC 0.04% 25,405 $498K
22 Hohimer Wealth Management, LLC 0.03% 13,066 $256K
23 XTX Topco Ltd 0.03% 87,736 $1.7M
24 SteelPeak Wealth, LLC 0.03% 48,462 $949K
25 TD Asset Management Inc 0.02% 1,541,044 $30.2M
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — Amphastar Pharmaceuticals In (AMPH)

What does the Smart Money Trend signal show for AMPH?

Selling streak — 6 quarters in a row: For 6 consecutive quarters, more hedge funds reduced or closed their AMPH positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.

What is the institutional breadth score for AMPH?

More sellers than buyers — 41% buying: Last quarter: 140 funds reduced or exited vs 98 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.

What is the fund quality score for AMPH holders?

Elite ownership — 43% AUM from top-100 funds: 49 of 209 holders are among the 100 largest funds by AUM, controlling 43% of total institutional value in AMPH. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.

How long have hedge funds held AMPH?

60% of holders stayed for 2+ years: 125 out of 209 hedge funds have held AMPH for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Is it too late to buy Amphastar Pharmaceuticals In (AMPH) following the 2026 Q1 hedge fund 13F filings?

As of today, AMPH has moved +19.1% since the 2026 Q1 13F filing date (May 15, 2026), compared to +6.0% for the XLV sector ETF — an outperformance of +13.1%. Since the quarter end (March 31, 2026), AMPH has gained +2.6% vs +4.9% for XLV. The stock has meaningfully outrun its sector. The trade has partially played out; entry is at a premium to the fund's implied reference.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.

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