Follow-The-Filings

Security · featured owners

BIIB Biogen Inc.

Health Care COM Equity as of 2026 Q2 among managers we track

  • 7 Owners
  • #223
  • Max 4.2%
  • Master 0.01%
  • $177M
  • 1 new 5 reduce 1 exit

BIIB (Biogen Inc.) is held in 7 featured 13F books as of 2026 Q2. Palo Alto Investors is the largest tracked holder by portfolio weight (4.2%). Figures are as-filed 13F, not free float.

Who owns this now

Largest portfolio weights among featured holders · max 4.2% (Palo Alto Investors) · not free-float ownership

  1. Palo Alto Investors reduce 4.2%
  2. Hillman Capital Management reduce 3.8%
  3. Samantha Mclemore reduce 2.0%
  4. Michael Krensavage 1.6%
  5. Sarah Ketterer reduce 0.65%
  6. Farallon Capital Management new 0.07%

holders

sorted by value · long equity only · current book 2026 Q2 · open a manager for their book

history
Samantha Mclemore - Patient Capital Management 2026 Q2 2.0% Reduce −25.3% 283,697 $61M history
Sarah Ketterer - Causeway Capital Management 2026 Q2 0.65% Reduce −0.9% 278,283 $60M history
Palo Alto Investors 2026 Q2 4.2% Reduce −0.3% 140,279 $30M history
Farallon Capital Management 2026 Q2 0.07% New 0.07% 71,000 $15M history
Hillman Capital Management 2026 Q2 3.8% Reduce −18.8% 23,993 $5M history
Michael Krensavage - Krensavage Asset Management 2026 Q2 1.6% Hold 20,000 $4M history
Murray Stahl - Horizon Kinetics Asset Management 2026 Q2 0.01% Reduce −4.6% 2,726 $589K history
Glenview Capital Management exited 2026 Q2 last 2026 Q1 0.26% Exit −0.26% 57,019 $10M history

7 current · 1 exited last period · options excluded

SEC filings

Recent issuer filings from EDGAR · 13 shown · open Filing / Doc on SEC.gov

Filed Form Detail Links
8-K 2.02,9.01 Filing Doc
10-Q Filing Doc
8-K 2.02 Filing Doc
8-K/A 9.01 Filing Doc
8-K 5.07 Filing Doc
8-K 1.01,2.01,2.03,7.01,9.01 Filing Doc
8-K 2.02,9.01 Filing Doc
10-Q Filing Doc
DEFA14A Filing Doc
8-K 2.02 Filing Doc
8-K 1.01,8.01,9.01 Filing Doc
8-K 5.02 Filing Doc
8-K 5.02,8.01 Filing Doc

Insider forms

Form 3 / 4 / 5 from EDGAR · 9 rows shown

Filed Form Detail Links
4 Period Sep 1, 2026 Filing Doc
4 Period Aug 3, 2026 Filing Doc
4 Period Jun 9, 2026 · 9 forms Filing Doc
4 Period May 1, 2026 Filing Doc
4 Period Apr 1, 2026 Filing Doc
4 Period Feb 13, 2026 · 7 forms Filing Doc
4 Period Feb 12, 2026 Filing Doc
4 Period Feb 13, 2026 · 2 forms Filing Doc
4 Period Feb 6, 2026 · 2 forms Filing Doc

Updated 11 days ago Source: SEC EDGAR submissions All on EDGAR

financials

US-GAAP annual · as tagged in Form 10-K · fiscal years · values link to the SEC filing

Income statement

Metric FY2023 FY2024 FY2025
Revenue $9.84B $9.68B $9.89B
Net income $1.16B $1.63B $1.29B
Net margin * 11.8% 16.9% 13.1%

Balance sheet

Metric FY2023 FY2024 FY2025
Total current assets $6.86B $7.46B $8.97B
Total non-current assets * $19.99B $20.59B $20.47B
Total assets $26.84B $28.05B $29.44B
Total current liabilities $3.43B $5.53B $3.35B
Total non-current liabilities * $8.61B $5.8B $7.83B
Total equity $14.8B — —

Cash flow

Metric FY2023 FY2024 FY2025
Cash from operations $1.55B $2.88B $2.2B
Cash from investing -$4.1B -$0.799B -$1.37B
Cash from financing $149.3M -$683.5M -$301.9M
Net change in cash * -$2.4B $1.39B $0.532B

Source: SEC companyfacts (US-GAAP 10-K) · * = computed (not a single XBRL tag) · fiscal year as labeled by the issuer · not adjusted or audited by Follow-The-Filings

ownership over time

filing count by report period · click a bar for that quarter’s holders