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ALNY

ALNY Hedge Fund & Institutional Holdings

Alnylam Pharmaceuticals INC

-$9.6B

Net Activity

Institutions Holding

784

Popularity Rank

#630

Avg Weight

0.11%

Total Value

$43.0B

Ownership Trend

784 institutions currently hold ALNY, with 409 net buyers and 410 net sellers this quarter.

Institutional Moves

Institutional Moves (Q1 2026)

Neutral

Based on recent trading activity

Net Selling Institutions

410

Net Buying Institutions

409

Key Holders

Key Holders

Top 5 by Value

FL
FMR LLC
$4.8B
CW
Capital World Investors
$3.6B
BI
BlackRock, Inc.
$3.5B
CR
Capital Research Global Investors
$3.1B
VP
Vanguard Portfolio Management LLC
$2.1B

Top 5 by Conviction

OA
Orbis Allan Gray Ltd
1.86%
TR
T. Rowe Price Investment Management, Inc.
1.18%
BG
Baillie Gifford & Co
0.84%
TS
Two Sigma Investments, LP
0.53%
CW
Capital World Investors
0.49%
View all 784 holding institutions

Across its top 20 institutional holders, ALNY's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 28/100).

Quarterly Activity

Recent Activity

+$23.5B

Total Buy Value

$25.8B

Total Sell Value

New buy87
Trim259
Add322
Sold out151

409

Net Buyers

410

Net Sellers

Smart Money Convergence

ALNY does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

Insider Trading (Form 4)

90d confidence

0

unique buyers

—

buy value

data as of 2026-07-21

12-Month Buy/Sell Activity

Feb 25
May 25
Sep 25
Jan 26
BuySell
ActionInsiderTitleDateValue
SellGarg PushkalEVP Chief R&D2026-03-05$163K
SellGarg PushkalEVP Chief R&D2026-03-05$166K
SellGarg PushkalEVP Chief R&D2026-03-05$239K
SellGarg PushkalEVP Chief R&D2026-03-05$211K
SellFitzgerald Kevin JosephCSO & EVP, Head of Research2026-03-05$40K
SellFitzgerald Kevin JosephCSO & EVP, Head of Research2026-03-05$75K
SellFitzgerald Kevin JosephCSO & EVP, Head of Research2026-03-05$48K
SellFitzgerald Kevin JosephCSO & EVP, Head of Research2026-03-05$50K
View all insider trades →

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

02043Q107

FAQ

Who are the top institutional investors holding ALNYLAM PHARMACEUTICALS INC (ALNY)?
Major stakeholders currently include FMR LLC ($4.8B), Capital World Investors ($3.6B), BlackRock, Inc. ($3.5B). Based on the latest 13F filings, there are a total of 784 tracked investment funds and institutions maintaining positions in ALNY.
What is the overall institutional sentiment toward ALNY recently?
Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $9.6B, driven by 409 managers accumulating shares while 410 reduced their exposure.
Which institutions have been selling or reducing their ALNY positions?
In the latest period, 259 funds trimmed their holdings, and 151 managers completely exited their positions. The aggregate reported sell value was $25.8B.
Are there any notable investors adding ALNY to their portfolios?
Yes, buying activity remains notable. 87 institutions opened new positions in {ticker}, and 322 existing holders added to their shares. The total reported buy value for the quarter amounted to $23.5B.

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