ALNY

Alnylam Pharmaceuticals Inc
Health CareUSCUSIP 02043Q107◍ Confluence graph
Tracked 13F Holders
691
-273 QoQ
13F Value (tracked)
$33.0B
Insider Net · 180d
-$2.4M
0↑ 2↓
Recent Filings
15
Smart-money sentimentMixed
BearishBullish
13F funds (latest Q)33 adding · 23 trimming
Insider net (180d)-$2.4M

Who owns ALNY?

691 tracked 13F filers

691 tracked 13F filers disclose a position in ALNY as of the latest SEC 13F filings, a combined $33.0B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

All quarters use one ordinary-share-equivalent series. Historical ADS are converted at 2 ADS = 1 ordinary share. Expand a row for the exact calculation; the residual is not classified as a trade.
3 source-reported value rows are withheld because the reported units do not agree with same-security peers. Share counts remain visible and unchanged.
#FundPosition valueSharesLast moveAs ofHistory
1FMR LLC
$4.8B
14.6M
−8.3%
Reduced · −1.3M sh
Q1 2026
2BlackRock, Inc.
$3.5B
10.4M
+0.4%
Added · +44K sh
Q1 2026
3VANGUARD PORTFOLIO MANAGEMENT LLC
$2.1B
6.5M
First observed position
No prior filed position
Q1 2026
4JPMORGAN CHASE & CO
$2.0B
6.3M
+34%
Added · +1.6M sh
Q1 2026
5VANGUARD CAPITAL MANAGEMENT LLC
$2.0B
5.9M
First observed position
No prior filed position
Q1 2026
6T. Rowe Price Investment Management, Inc.
Withheld
5.2M
+196%
Added · +3.4M sh
Q1 2026
7STATE STREET CORP
$1.1B
3.6M
+7.0%
Added · +233K sh
Q2 2026
8GEODE CAPITAL MANAGEMENT, LLC
$791.3M
2.6M
−0.9%
Reduced · −25K sh
Q2 2026
9BAILLIE GIFFORD & CO
$825.1M
2.5M
−4.1%
Reduced · −107K sh
Q1 2026
10NORGES BANK
$895.8M
2.3M
+11%
Added · +220K sh
Q4 2025
11TWO SIGMA INVESTMENTS, LP
$659.3M
2.0M
+223%
Added · +1.4M sh
Q1 2026
12Orbis Allan Gray Ltd
$598.3M
2.0M
+49%
Added · +653K sh
Q2 2026
13DODGE & COX
$638.3M
1.9M
−1.8%
Reduced · −35K sh
Q1 2026
14AMERICAN CENTURY COMPANIES INC
$596.3M
1.8M
+21%
Added · +317K sh
Q1 2026
15PRICE T ROWE ASSOCIATES INC /MD/
$474.1M
1.4M
−16%
Reduced · −270K sh
Q1 2026
16Clearbridge Investments, LLC
$448.7M
1.4M
+127%
Added · +759K sh
Q1 2026
17MARSHALL WACE, LLP
$363.7M
1.1M
+100%
Added · +549K sh
Q1 2026
18D. E. Shaw & Co., Inc.
$350.4M
1.1M
+138%
Added · +615K sh
Q1 2026
19MORGAN STANLEY
$331.8M
1.0M
+3.4%
Added · +33K sh
Q1 2026
20BANK OF AMERICA CORP /DE/
$319.9M
967K
+41%
Added · +282K sh
Q1 2026
21Legal & General Group Plc
$309.3M
935K
−2.8%
Reduced · −27K sh
Q1 2026
22AQR CAPITAL MANAGEMENT LLC
$297.9M
913K
−0.7%
Reduced · −7K sh
Q1 2026
23NORTHERN TRUST CORP
$283.9M
858K
~0%
Added · +378 sh
Q1 2026
24VANGUARD FIDUCIARY TRUST CO
$278.2M
841K
First observed position
No prior filed position
Q1 2026
25Qube Research & Technologies Ltd
$277.3M
838K
+8.2%
Added · +64K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is ALNY being bought or sold by institutions?

Last quarter, 0 funds opened a new position in ALNY and 33 added to an existing one, while 23 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened (NEW)
0
funds
Added
33
funds
Reduced
23
funds
Exited
0
funds

Funds that own ALNY also own

CompanyCo-held byCombined value
NVIDIA CORPNVDA421 funds$485.3B
MICROSOFT CORPMSFT416 funds$330.4B
AMAZON.COM INCAMZN416 funds$247.8B
ELI LILLY & COLLY415 funds$92.1B
ALPHABET INC-CL AGOOGL411 funds$220.4B
META PLATFORMS INC-CLASS AMETA411 funds$141.6B
APPLE INCAAPL407 funds$360.4B
BROADCOM INCAVGO404 funds$182.7B
ALPHABET INC-CL CGOOG396 funds$146.0B
JPMORGAN CHASE & COJPM395 funds$81.7B
VISA INC-CLASS A SHARESV394 funds$77.5B
ADVANCED MICRO DEVICESAMD393 funds$47.9B

Ranked by how many of ALNY's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$2.4M
2 insiders
Net
-$2.4M
19 P/S txns
Signal
Net Selling
open-market
DateInsiderRoleActionSharesValue
Jun 1, 2026PYOTT DAVID E IDirectorSell (S)921$274K
Jun 1, 2026PYOTT DAVID E IDirectorSell (S)1K$351K
Jun 1, 2026PYOTT DAVID E IDirectorSell (S)1K$366K
Jun 1, 2026PYOTT DAVID E IDirectorSell (S)495$149K
Jun 1, 2026PYOTT DAVID E IDirectorSell (S)17$5K
Apr 6, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)56$18K
Apr 6, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)909$300K
Apr 6, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)829$274K
Apr 6, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)293$97K
Apr 6, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)199$66K
Apr 2, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)265$84K
Apr 2, 2026McLaughlin MelissaChief Human Resources OfficerSell (S)359$114K

Institutional ownership over time

404 funds-7 since Q3 2024
0359718Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
funds holding aggregate valuelatest $4.5B · 1 values withheld

Share classes

Class13F holdersValue held
ALNYthis pagecs691 funds$33.0B
ALNY 1 09/15/27NOTE 1.000% 9/140 funds$379.4M

Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.

Recent filings

15 shown

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Ask your agent what changed in ALNY

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/ALNY/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for ALNY.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ALNY. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.