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ALNY — structural market context

Alnylam Pharmaceuticals, Inc.

Structural market context from public regulatory and market data, shown with its as-of dates. Descriptive only: nothing on this page is a recommendation, a prediction, or advice to buy or sell any security.

What changed

As of the close on Oct 21. Each line shows the earlier value, the later value and their dates.

Price

Close $225.10 (Oct 21) vs $230.71 (Oct 20): −2.43%.

Volume

0.94× its 20-session average (1.3M) on Oct 21.

Includes pre- and post-market trading.

Short interest

Short interest 7.7M shares (settlement Sep 30) vs 7.2M (Sep 15).

No new publication in this window. Latest: settlement Sep 30, published Oct 10.

Fails-to-deliver

Latest file (settlements Sep 15–Sep 30, published Oct 16): 5 days with fails, largest 1K shares on Sep 22.

Previous file (settlements Sep 1–Sep 14, published Sep 30): no fails listed.

No new publication in this window.

Analyst rating actions

None recorded in this window.

Insider filings (Form 4)

None recorded in this window.

ALNY short interest & days to cover

SHARES SHORT
7.7M
% OF FLOAT
5.8%
DAYS TO COVER
6.5
CHANGE VS PRIOR
+7.2%

FINRA consolidated short interest, reported twice a month and published ~2 weeks after each settlement date. % of float uses reported free float. · as of 2026-09-30 (22d ago)

ALNY fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-09-24 · 28d1K$246.51
2026-09-23 · 29d1K$251.65
2026-09-22 · 30d1K$244.32

SEC fails-to-deliver files, published twice a month with ~6 weeks of delay.

ALNY insider buying and selling (Form 4)

Last 12 months, Form 4 codes P and S: 0 purchases · 1 sale

InsiderTypeSharesValueFiled
SUPRAN BRYAN · officer: EVP, CLO and SecretarySale (S)2K$399K2026-10-06

SEC Form 4 filings: purchases and sales reported on Form 4 (transaction codes P and S) only; grants and option exercises excluded. Attributed public records.

ALNY analyst ratings

FirmActionRatingPublished
UBSprice_target—2026-10-15
Wells Fargoprice_target—2026-10-14
RBC CapitalholdOutperform2026-10-08
RBC Capitalprice_target—2026-10-08
Cantor FitzgeraldholdNeutral2026-09-30

Rating actions as published by the firms, from public feeds. They are not graded here.

Frequently asked questions

What is ALNY's short interest?
As of the FINRA settlement date 2026-09-30, ALNY had 7.7M shares sold short — 5.8% of its float, with 6.5 days to cover at average volume. FINRA publishes this data roughly two weeks after each twice-monthly settlement, so it is inherently delayed. A short-interest figure describes an aggregate position; it does not predict what the stock will do.
Are insiders buying ALNY?
In the last 12 months of SEC Form 4 filings, ALNY recorded 0 insider purchases and 1 sale reported on Form 4 (transaction codes P and S; grants and option exercises excluded). These are attributed public records — information, not instruction.
What do analysts say about ALNY?
The most recent action: UBS price_target on 2026-10-15. Rating actions are shown as published by the firms; they are not graded here.
Is this page telling me to buy or sell ALNY?
No. Everything on this page is descriptive, structural market context from public data, shown with its as-of dates. TradeAI News does not issue directional recommendations, price predictions, or buy/sell advice — for any ticker.
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ALNY: the full history

Latest rows shown. Full history, market-wide screens, cluster detection and the context journal live in the dashboard.

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Not financial advice. Trading involves risk. Descriptive structural context, never a recommendation.