$BIIB stock is up 2% today. Here's what we see in our data.

$BIIB stock has now risen 2% today, according to our price data from Polygon. There has been approximately $71,166,209 of trading volume.

It has been the 18th most-searched ticker on Quiver Quantitative over the last day, out of 13,113 total tickers searched.

Here is what we see in our data on $BIIB (you can track the company live on Quiver's $BIIB stock page):

$BIIB Insider Trading Activity

$BIIB insiders have traded $BIIB stock on the open market 3 times in the past 6 months. Of those trades, 1 have been purchases and 2 have been sales.

Here’s a breakdown of recent trading of $BIIB stock by insiders over the last 6 months:

PRIYA SINGHAL (Head of Development) has made 0 purchases and 2 sales selling 3,408 shares for an estimated $665,664.
NICOLE MURPHY (Head of Pharm Ops and Tech) purchased 3 shares for an estimated $585

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$BIIB Hedge Fund Activity

We have seen 518 institutional investors add shares of $BIIB stock to their portfolio, and 443 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

FMR LLC added 3,381,678 shares (+35.9%) to their portfolio in Q1 2026, for an estimated $619,963,027
POINT72 ASSET MANAGEMENT, L.P. removed 2,003,575 shares (-71.2%) from their portfolio in Q1 2026, for an estimated $367,315,404
PACER ADVISORS, INC. removed 1,451,249 shares (-100.0%) from their portfolio in Q4 2025, for an estimated $255,405,311
BLACKROCK, INC. added 1,163,231 shares (+7.9%) to their portfolio in Q1 2026, for an estimated $213,255,139
MILLENNIUM MANAGEMENT LLC removed 1,031,622 shares (-91.7%) from their portfolio in Q1 2026, for an estimated $189,127,261
INVESCO LTD. removed 762,686 shares (-31.5%) from their portfolio in Q4 2025, for an estimated $134,225,109
BARCLAYS PLC removed 753,533 shares (-57.7%) from their portfolio in Q1 2026, for an estimated $138,145,204

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

EARLY ACCESS

Receive BIIB Data Alerts

Real-time alerts on filings, insider trades, and market signals — before everyone else.

Get Alerts →

$BIIB Revenue

$BIIB had revenues of $2.5B in Q1 2026. This is an increase of 1.93% from the same period in the prior year.

You can track BIIB financials on Quiver Quantitative's BIIB stock page.

You can access data on BIIB stock through the Quiver Quantitative API.

$BIIB Congressional Stock Trading

Members of Congress have traded $BIIB stock 4 times in the past 6 months. Of those trades, 4 have been purchases and 0 have been sales.

Here’s a breakdown of recent trading of $BIIB stock by members of Congress over the last 6 months:

REPRESENTATIVE MARIA ELVIRA SALAZAR has traded it 3 times. They made 3 purchases worth up to $130,000 on 05/12, 05/11 and 0 sales.
REPRESENTATIVE GILBERT RAY CISNEROS, JR. purchased up to $15,000 on 01/30.

To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.

$BIIB Analyst Ratings

Wall Street analysts have issued reports on $BIIB in the last several months. We have seen 4 firms issue buy ratings on the stock, and 0 firms issue sell ratings.

Here are some recent analyst ratings:

Needham issued a "Buy" rating on 06/08/2026
Evercore ISI Group issued a "Outperform" rating on 05/15/2026
Guggenheim issued a "Buy" rating on 04/30/2026
Oppenheimer issued a "Outperform" rating on 01/30/2026

To track analyst ratings and price targets for $BIIB, check out Quiver Quantitative's $BIIB forecast page.

$BIIB Price Targets

Multiple analysts have issued price targets for $BIIB recently. We have seen 18 analysts offer price targets for $BIIB in the last 6 months, with a median target of $225.0.

Here are some recent targets:

Ami Fadia from Needham set a target price of $255.0 on 06/08/2026
Brian Abrahams from RBC Capital set a target price of $227.0 on 05/27/2026
David Amsellem from Piper Sandler set a target price of $225.0 on 05/15/2026
Geoff Meacham from Citigroup set a target price of $200.0 on 05/01/2026
Laura Chico from Wedbush set a target price of $196.0 on 04/30/2026
Matthew Harrison from Morgan Stanley set a target price of $206.0 on 04/30/2026
Yatin Suneja from Guggenheim set a target price of $260.0 on 04/30/2026

You can track data on $BIIB on Quiver Quantitative.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.