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 Q1 2021?

381 institutional investors reported ALNY - ALNYLAM PHARMACEUTICALS, INC. - Common Stock for Q1 2021. Use the holders table for investor-level position and value details.

ALNYLAM PHARMACEUTICALS, INC. - Common Stock (ALNY)

CUSIP: 02043Q107

Q1 2021 13F Holders as of 31 Mar 2021

Type / Class: Equity / Common Stock
Shares outstanding: 132,795,065
Total 13F shares: 109,361,699
Share change: +1,355,990
Total reported value: $15,431,272,628
Put/Call ratio: 62%
Price per share: $141.19
Number of holders: 381
Value change: +$204,818,578
Number of buys: 193
Number of sells: 142

Quarterly Holders Quick Answers

What is CUSIP 02043Q107?
CUSIP 02043Q107 identifies ALNY - ALNYLAM PHARMACEUTICALS, INC. - Common Stock in SEC institutional holdings data.

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2021
Previous quarter: Q4 2020

Recent filing periods for CUSIP 02043Q107:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of ALNY - ALNYLAM PHARMACEUTICALS, INC. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
FMR LLC	13F	Company	12%	16,091,945	$2,091,470,000	—	31 Dec 2020	13F
VANGUARD GROUP INC	13F	Company	7.9%	10,526,424	$1,368,119,000	—	31 Dec 2020	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	7.6%	10,056,940	$1,307,101,000	—	31 Dec 2020	13F
BAILLIE GIFFORD & CO	13F	Company	6.9%	9,132,422	$1,186,941,000	—	31 Dec 2020	13F
BlackRock Finance, Inc.	13F	Company	6.6%	8,723,720	$1,133,822,000	—	31 Dec 2020	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	4.2%	5,575,342	$724,627,000	—	31 Dec 2020	13F
DODGE & COX	13F	Company	3.5%	4,639,913	$603,049,000	—	31 Dec 2020	13F
STATE STREET CORP	13F	Company	2.1%	2,804,704	$364,527,000	—	31 Dec 2020	13F
JPMORGAN CHASE & CO	13F	Company	1.7%	2,304,450	$299,508,000	—	31 Dec 2020	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	1.3%	1,763,367	$229,185,000	—	31 Dec 2020	13F
MORGAN STANLEY	13F	Company	1.3%	1,691,838	$219,889,000	—	31 Dec 2020	13F
RTW INVESTMENTS, LP	13F	Company	1.3%	1,681,645	$218,563,000	—	31 Dec 2020	13F
Bellevue Group AG	13F	Company	1.2%	1,603,500	$208,406,000	—	31 Dec 2020	13F
MANUFACTURERS LIFE INSURANCE COMPANY, THE	13F	Company	1.1%	1,464,089	$190,287,000	—	31 Dec 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.99%	1,309,133	$169,928,000	—	31 Dec 2020	13F
Invesco Ltd.	13F	Company	0.96%	1,278,242	$166,133,000	—	31 Dec 2020	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.81%	1,079,350	$140,283,000	—	31 Dec 2020	13F
NORGES BANK	13F	Company	0.78%	1,038,988	$135,037,000	—	31 Dec 2020	13F
MAVERICK CAPITAL LTD	13F	Company	0.74%	984,502	$127,956,000	—	31 Dec 2020	13F
GILDER GAGNON HOWE & CO LLC	13F	Company	0.67%	884,130	$114,910,000	—	31 Dec 2020	13F
Artal Group S.A.	13F	Company	0.6%	800,000	$103,976,000	—	31 Dec 2020	13F
Casdin Capital, LLC	13F	Company	0.59%	780,000	$101,377,000	—	31 Dec 2020	13F
NORTHERN TRUST CORP	13F	Company	0.56%	742,770	$96,537,000	—	31 Dec 2020	13F
FEDERATED HERMES, INC.	13F	Company	0.55%	735,474	$95,589,000	—	31 Dec 2020	13F
12 West Capital Management LP	13F	Company	0.55%	735,000	$95,528,000	—	31 Dec 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.54%	713,385	$92,719,000	—	31 Dec 2020	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.53%	705,435	$91,685,388	—	31 Dec 2020	13F
Legal & General Group Plc	13F	Company	0.49%	645,372	$83,879,000	—	31 Dec 2020	13F
Blackstone Inc.	13F	Company	0.48%	637,827	$82,898,000	—	31 Dec 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.45%	598,700	$77,813,000	—	31 Dec 2020	13F
ALKEON CAPITAL MANAGEMENT LLC	13F	Company	0.44%	582,085	$75,653,000	—	31 Dec 2020	13F
FIRST TRUST ADVISORS LP	13F	Company	0.42%	562,625	$73,124,000	—	31 Dec 2020	13F
Mitsubishi UFJ Trust & Banking Corp	13F	Company	0.41%	542,842	$70,554,000	—	31 Dec 2020	13F
Point72 Asset Management, L.P.	13F	Company	0.36%	481,900	$62,633,000	—	31 Dec 2020	13F
Bank of New York Mellon Corp	13F	Company	0.33%	442,687	$57,536,000	—	31 Dec 2020	13F
Swiss National Bank	13F	Company	0.33%	438,024	$56,930,000	—	31 Dec 2020	13F
PICTET ASSET MANAGEMENT LTD	13F	Company	0.32%	422,550	$54,919,000	—	31 Dec 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.3%	400,276	$52,024,000	—	31 Dec 2020	13F
Rockefeller Capital Management L.P.	13F	Company	0.29%	388,745	$50,523,000	—	31 Dec 2020	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.29%	381,411	$49,572,000	—	31 Dec 2020	13F
Capital World Investors	13F	Company	0.27%	352,546	$45,820,000	—	31 Dec 2020	13F
FARALLON CAPITAL MANAGEMENT LLC	13F	Company	0.26%	350,000	$45,490,000	—	31 Dec 2020	13F
Rock Springs Capital Management LP	13F	Company	0.25%	335,000	$43,540,000	—	31 Dec 2020	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.25%	333,740	$43,376,000	—	31 Dec 2020	13F
BRIDGER MANAGEMENT, LLC	13F	Company	0.24%	313,632	$40,763,000	—	31 Dec 2020	13F
DEUTSCHE BANK AG\	13F	Company	0.22%	293,267	$38,117,000	—	31 Dec 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.2%	268,627	$34,914,000	—	31 Dec 2020	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	0.18%	242,080	$31,463,000	—	31 Dec 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.18%	235,001	$30,545,000	—	31 Dec 2020	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.16%	218,576	$28,409,000	—	31 Dec 2020	13F

Institutional Holders of ALNYLAM PHARMACEUTICALS, INC. - Common Stock (ALNY) as of Q1 2021

As of 31 Mar 2021, ALNYLAM PHARMACEUTICALS, INC. - Common Stock (ALNY) was held by 381 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 109,361,699 shares. The largest 10 holders included FMR LLC, VANGUARD GROUP INC, BAILLIE GIFFORD & CO, WELLINGTON MANAGEMENT GROUP LLP, BlackRock Inc., PRICE T ROWE ASSOCIATES INC /MD/, Dodge & Cox, STATE STREET CORP, JPMORGAN CHASE & CO, and MORGAN STANLEY. This page lists 382 institutional shareholders reporting positions in this security for the Q1 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

353

Q1 2021 holders

381

Holder diff

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 Value $	Q1 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.