What does CUSIP 02043Q107 represent in this 13F holders report?

CUSIP 02043Q107 is the security identifier for ALNY - Alnylam Pharmaceuticals, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ALNY - Alnylam Pharmaceuticals, Inc. - Common Stock in Q3 2026?

399 institutional investors reported ALNY - Alnylam Pharmaceuticals, Inc. - Common Stock for Q3 2026. Use the holders table for investor-level position and value details.

Alnylam Pharmaceuticals, Inc. - Common Stock (ALNY)

CUSIP: 02043Q107

Q3 2026 13F Holders as of 30 Sep 2026

Security type / class: Equity / Common Stock
Total 13F shares: 52,577,509
Total 13F value: $12,937,944,351
Share change: +3,702,084
Put/Call ratio: 204%
SEC-reported price per share: $246.74
Number of holders: 399
Value change: +$865,266,094
Number of buys: 202
Number of sells: 203
Shares outstanding: 133,985,952

Security key

02043Q107

Report period

Q3 2026

Institutions

399

Top holders

ALNY full security history Ownership snapshot Full 13F holder table ALNYLAM PHARMACEUTICALS, INC. SEC filings ALNYLAM PHARMACEUTICALS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of ALNY - Alnylam Pharmaceuticals, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Capital World Investors

Disclosed value leader

FMR LLC

Comparable rows

5/15

Latest evidence

30 Sep 2026

13D/G 13F Lead comparable stake: 10% 10 rows are not safely comparable across share classes. 13D/G row: Capital World Investors Showing 1-6 of 15 holder rows.

Quick read

Capital World Investors leads the comparable SEC ownership view at 10%.

5 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Capital World Investors's linked filing trail.

Comparable ownership Top 5

Capital World Investors 10%

FMR LLC 9.5%

Capital Research Global Investors 7.1%

VANGUARD CAPITAL MANAGEMENT LLC 5.4%

VANGUARD PORTFOLIO MANAGEMENT LLC 5%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Capital World Investors	13D/G 13F Company 13D/G 13F	10% Reported 13D/G · 30 Sep 2026	$3,438,208,153 13,934,539 shares	+$744,597,168	30 Sep 2026
FMR LLC	13F 13D/G Company 13F 13D/G	9.5% Reported 13D/G · 30 Sep 2026	$4,522,663,249 15,023,962 shares	—	30 Jun 2026
Capital Research Global Investors	13D/G 13F Company 13D/G 13F	7.1% Reported 13D/G · 31 Mar 2026	$3,153,903,273 9,471,181 shares	+$833,388,444	31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	13D/G 13F Vanguard Capital Management · Company 13D/G 13F	5.4% Reported 13D/G · 31 Mar 2026	$2,350,677,826 7,104,536 shares	$0	31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13F 13D/G Company · Vanguard Portfolio Management 13F 13D/G	5% Reported 13D/G · 30 Sep 2026	$1,968,251,542 6,538,390 shares	—	30 Jun 2026
BlackRock, Inc.	13F Company 13F	— denominator unverified	$3,283,537,489 10,907,675 shares	—	30 Jun 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

399

52,577,509

Rows available

399

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2026 vs Q2 2026 Across Filers

Q2 2026 holders

792

Q3 2026 holders

399

Holder diff

-393

Investor	Q2 2026 Shares	Q3 2026 Shares	Share Diff	Share Chg %	Q2 2026 value	Q3 2026 value	Value change	Value Chg %