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Equity · Healthcare

BIIB

NASDAQ

Biogen Inc.

$233 −1.02% vs prior close Finazon · prior-day close, indicative (IEX-derived, not the official close) · Oct 16, 2026
Price · Chart
63 sessions
$240 $180 21 Jul 16 Oct

The line runs $203 on 21 July through $233 on 16 October, on a scale from $180 to $240. Days the market did not trade hold the previous close, flat.

Track this symbol on TradingView TradingView chart · our licensed closes: 63 sessions, 21 Jul – 16 Oct 2026
Market cap $34.4B
P/E (TTM) 25.1
52-week range $142.25 – $235.41
Avg volume 73.1K

as of Oct 16, 2026

BIIB insider trades

SEC Form 4 · last 90 days · newest reported trade 4 Aug 2026
Open-market buys 0
Open-market sells 2
Net sold $240K
Non-trade filings 2
Date Insider Type Shares Value
04 Aug 2026 Minor Lloyd Director Sell 593 $119K
03 Aug 2026 Minor Lloyd Director Sell 593 $121K

Compensation mechanics Share grants, option exercises, tax withholding and transfers. They reach the same Form 4 as a trade, but they are not the insider buying or selling on the open market, so no purchase or sale value applies to them.

Date Insider Type Shares Value
02 Oct 2026 Godbout Sean Chief Accounting Officer Option exercise 27
02 Oct 2026 Godbout Sean Chief Accounting Officer Tax withheld 8 $2K

BIIB reported financials

SEC EDGAR XBRL SEC EDGAR

BIIB reported revenue of $9.9B for the fiscal year ended 31 Dec 2025. Net income over the same period was $1.3B.

Figure Reported Period
Revenue $9.9B 31 Dec 2025 fiscal year
Net income $1.3B 31 Dec 2025 fiscal year
Diluted EPS $8.79 31 Dec 2025 fiscal year
Total assets $29.5B 31 Mar 2026 at period end
Total equity incl. minority interest $18.7B 31 Mar 2026 at period end

BIIB earnings

SEC EDGAR
Date Period EPS Revenue
31 Mar 2026 Q1 2026 $2.15 $2.48B
31 Dec 2025 FY 2025 $8.79 $9.89B
30 Sep 2025 Q3 2025 $3.17 $2.53B
30 Jun 2025 Q2 2025 $4.33 $2.65B
31 Mar 2025 Q1 2025 $1.64 $2.43B
31 Dec 2024 FY 2024 $11.18 $9.68B
30 Sep 2024 Q3 2024 $2.66 $2.47B
30 Jun 2024 Q2 2024 $4.00 $2.46B

Next report no date announced in SEC filings yet

Reported figures & scheduled dates · SEC EDGAR filings

BIIB institutional holders

SEC Form 13F SEC EDGAR

10 of the 45 institutional funds we track reported a BIIB position for the quarter ended 30 Jun 2026 — a combined $736.2M; the latest of those filings landed 02 Sep 2026.

Fund Action Shares Value
AQR Capital Management Held (±25%) +0.7% shares 1,936,859 $416.9M
Citadel Advisors Added +203.0% shares 418,356 $90.4M
Fisher Asset Management Held (±25%) +8.1% shares 338,018 $73.0M
Balyasny Asset Management Trimmed −59.2% shares 265,090 $57.3M
Man Group Trimmed −38.4% shares 196,222 $42.4M
Point72 Asset Management Trimmed −89.1% shares 88,149 $19.0M
Renaissance Technologies Trimmed −61.8% shares 77,744 $16.8M
D. E. Shaw & Co. New position 74,438 $16.1M
Marshall Wace Trimmed −94.5% shares 12,595 $2.7M
Two Sigma Investments Held (±25%) −24.8% shares 7,105 $1.5M

BIIB fails-to-deliver

SEC CNS data SEC

On 28 Sep 2026, 49,163 shares of BIIB failed to deliver (about $11.2M).

Settlement date Shares failed Notional % of shares out
28 Sep 2026 49,163 $11.2M 0.033%
24 Sep 2026 58 $13K <0.001%
23 Sep 2026 300 $68K <0.001%
22 Sep 2026 187 $41K <0.001%
21 Sep 2026 61 $13K <0.001%
18 Sep 2026 2,277 $499K 0.002%
17 Sep 2026 634 $137K <0.001%
14 Sep 2026 416 $90K <0.001%
11 Sep 2026 386 $83K <0.001%
08 Sep 2026 7,185 $1.6M 0.005%
04 Sep 2026 17,209 $3.9M 0.012%

Congressional trades in BIIB

STOCK Act disclosures House disclosures

The most recent congressional trade disclosed in BIIB is a sale by Maria Elvira Salazar (house, FL), dated 24 Sep 2026.

Date Member Type Amount
24 Sep 2026 filed 07 Oct 2026 Maria Elvira Salazar house · Republican–FL Sale $1K–$15K
18 Aug 2026 filed 01 Sep 2026 Kevin Hern house · Republican–OK Sale $1K–$15K
12 May 2026 filed 08 Jun 2026 Maria Elvira Salazar house · Republican–FL Purchase $1K–$15K
30 Jan 2026 filed 13 Feb 2026 Gilbert Ray Cisneros, Jr. house · Democrat–CA Purchase $1K–$15K
15 May 2025 filed 09 Jun 2025 Robert P. Bresnahan, Jr. house · Republican–PA Purchase $1K–$15K
08 Apr 2025 filed 08 May 2025 Robert P. Bresnahan, Jr. house · Republican–PA Sale $1K–$15K
25 Feb 2025 filed 27 Mar 2025 Robert P. Bresnahan, Jr. house · Republican–PA Purchase $1K–$15K
17 Mar 2022 filed 17 Apr 2022 Josh Gottheimer house · Democrat–NJ Sale $1K–$15K

Sources

  1. Finazonprior-day close, indicative (IEX-derived, not the official close), some closes dollar-rounded at the source
  2. TradingViewthe price chart widget, drawn by TradingView from their own data
  3. SEC EDGARSEC EDGAR XBRL company facts · latest period ended 31 Mar 2026
  4. SEC EDGARSEC EDGAR 13F filings
  5. SECSEC fails-to-deliver (CNS) data
  6. House disclosuresU.S. House of Representatives financial disclosures
  7. SEC EDGARValuation computed from SEC EDGAR filings