Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

Alnylam Pharmaceuticals Inc (ALNY)

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

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↓ -57
Streak
1Q ▼
Buyers last Q
51%

Smart Money Signals — ALNY

Based on 789 hedge funds · latest filing: 2026 Q1 · updated quarterly

📉

Selling streak — 1 quarter in a row

last 6Q
For 1 consecutive quarter, more hedge funds reduced or closed their ALNY 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 — 93% of 3.0Y peak

93% of all-time peak
789 funds currently hold this stock — 93% of the 3.0-year high of 846 funds (reached 2025 Q4). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.
🚀

Fast accumulation — +27% more funds vs a year ago

fund count last 6Q
+167 new funds entered over the past year (+27% YoY). That's a rapid rush of institutional money. Fast accumulation often signals a major thesis — but it also means the stock could fall quickly if that thesis breaks.
🟡

Slight buying edge — 51% buying

435 buying424 selling
Last quarter: 435 funds bought or added vs 424 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.
⚠️

Fewer new buyers each quarter (-63 vs last Q)

new funds entering per quarter
Funds opening this position for the first time: 101 → 218 → 170 → 107. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.
🔒

50% of holders stayed for 2+ years

■ 50% conviction (2yr+) ■ 24% medium ■ 26% new
398 out of 789 hedge funds have held ALNY 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 -5%, value -25%

Value
-24%
Shares
-5%
Last quarter: funds added -5% more shares while total portfolio value only changed -25%. Institutions were buying while the price was falling — a high-conviction accumulation signal. They're deliberately loading up on the dip.
➡️

Steady discovery — ~107 new funds/quarter

111 → 101 → 218 → 170 → 107 new funds/Q
New funds entering each quarter: 101 → 218 → 170 → 107. Consistent flow of new institutional buyers without clear acceleration or slowdown.
🏛️

Veteran-anchored — 58% veterans vs 31% newcomers

■ 58% veterans ■ 11% 1-2yr ■ 31% new
Entry-cohort mix of 818 holders: 476 (58%) are 2+ year veterans, 92 entered 1–2 years ago, and 250 (31%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.
🏆

Elite ownership — 60% AUM from top-100 funds

60% from top-100 AUM funds
66 of 784 holders are among the 100 largest funds by AUM, controlling 60% of total institutional value in ALNY. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
3.6
out of 10
Low Exit Risk
Exit risk score 3.6/10 — 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 — ALNY

In 2026 Q1, 435 hedge funds were net buyers of ALNY (107 opened a new position, 328 added to an existing one), while 424 reduced or exited (260 trimmed, 164 sold completely) — a 51% buyer ratio, indicating a slight buying edge. 60% of total institutional value in ALNY is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: -57 funds (more exits than new entries). Total institutional holders: 789.

Hedge Fund Ownership: ALNY

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

Market Analysis: ALNY

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: ALNY

-- --

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

Is It Too Late to Buy Alnylam Pharmaceuticals Inc (ALNY) Based on Hedge Fund 13F Filings?

Signal Freshness measures how much ALNY 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 · 76d ago
ALNY
-14.5%
XLV
+4.9%

ALNY outperformed XLV by -19.4% since March 31, 2026.

Since 13F Filing Date May 15, 2026 · 31d ago
ALNY
-1.4%
XLV
+6.0%

Since the filing became public, ALNY outperformed XLV by -7.4% .

Interpretation: The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference. Learn more →

Smart Money Signal ?
Broad Consensus, Selective Conviction

Many quality funds hold this stock, but top-tier positions remain relatively small.

49 top-rated funds 1 high-conviction
Consensus
7.4
/ 10
breadth
×
Elite
2.3
/ 10
conviction
Hedge Fund Positioning: ALNY
784 + Investors

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

Metric All 13F Filers (2026 Q1) Prior (2025 Q4) Change
Funds Holding 784 846 -7.33%
13F Shares 125M 132M -5.37%
Total Value $39.03B $51.77B -24.62%
New Positions 106 170 -64
Increased Positions 316 281 +35
Closed Positions 168 133 +35
Reduced Positions 251 293 -42
Total Calls 17 21 -19.05%
Total Puts 17 23 -26.09%
PUT/CALL Ratio 1.0 1.1 Neutral

Statistics: ALNY

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Valuation Measures Data as of: --

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

Financial Highlights

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Diluted EPS (ttm) --
Total Cash (mrq) --
Total Debt/Equity (mrq) --
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Institutional Holders (2026 Q1)

784 + investors

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

QUARTER:
Top 25 ALNY holders by conviction (% of portfolio weight) — 2026 Q1 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Prosight Management, LP 4.12% 76,000 $25.1M
2 Rosenblum Silverman Sutton S F Inc /Ca 2.85% 32,927 $10.9M
3 683 Capital Management, LLC 2.21% 128,100 $42.4M
4 Casdin Capital, LLC 1.88% 75,000 $24.8M
5 Orbis Allan Gray Ltd 1.86% 1,334,825 $441.7M
6 Bellevue Group AG 1.85% 234,543 $77.6M
7 Soleus Capital Management, L.P. 1.76% 131,650 $43.6M
8 Polymer Capital Management (HK) LTD 1.65% 57,784 $19.1M
9 Ishara Investments LP 1.61% 5,125 $1.7M
10 Cannon Global Investment Management, LLC 1.55% 2,400 $794K
11 FengHe Fund Management Pte. Ltd. 1.49% 32,500 $10.8M
12 Sierra Summit Advisors LLC 1.46% 30,298 $10.0M
13 Rock Springs Capital Management LP 1.44% 74,000 $24.5M
14 Rhenman & Partners Asset Management AB 1.41% 34,465 $11.4M
15 Bronte Capital Management Pty Ltd. 1.22% 37,245 $12.3M
16 Gilder Gagnon Howe & Co LLC 1.11% 280,092 $92.7M
17 Tremblant Capital Group 1.01% 94,556 $31.3M
18 ANTIPODES PARTNERS Ltd 0.93% 145,310 $48.1M
19 Parkman Healthcare Partners LLC 0.92% 26,916 $8.9M
20 Two Sigma Advisers, LP 0.88% 1,132,560 $450.4M
21 Baillie Gifford & Co 0.84% 2,493,866 $825.1M
22 Privium Fund Management B.V. 0.84% 12,222 $4.0M
23 Orbimed Advisors LLC 0.78% 119,000 $39.4M
24 Pinebridge Investments LLC 0.76% 271,419 $89.8M
25 Slow Capital, Inc. 0.75% 17,461 $5.8M
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 — Alnylam Pharmaceuticals Inc (ALNY)

What does the Smart Money Trend signal show for ALNY?

Selling streak — 1 quarter in a row: For 1 consecutive quarter, more hedge funds reduced or closed their ALNY 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 ALNY?

Slight buying edge — 51% buying: Last quarter: 435 funds bought or added vs 424 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.

What is the fund quality score for ALNY holders?

Elite ownership — 60% AUM from top-100 funds: 66 of 784 holders are among the 100 largest funds by AUM, controlling 60% of total institutional value in ALNY. 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 ALNY?

50% of holders stayed for 2+ years: 398 out of 789 hedge funds have held ALNY 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 Alnylam Pharmaceuticals Inc (ALNY) following the 2026 Q1 hedge fund 13F filings?

As of today, ALNY has moved -1.4% since the 2026 Q1 13F filing date (May 15, 2026), compared to +6.0% for the XLV sector ETF — an outperformance of -7.4%. Since the quarter end (March 31, 2026), ALNY has gained -14.5% vs +4.9% for XLV. The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near 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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