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Politician trade (Senate)

Biogen (BIIB)Sen. Alan Armstrong disclosed a purchase $1K–$15K

Sen. Alan Armstrong disclosed a purchase of Biogen in the $1K–$15K range.

$1,001–$15,000
Reported range · official band, not an exact amount
116 days
Disclosure lag
Traded
Mar 27, 2026
Disclosed
Jul 21, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

  1. Jan 30, 2026CongressDisclosed purchase of BIIB — reported range $1,001 - $15,000
  2. Feb 2, 2026InsiderOfficer sold ~$134K of BIIB shares in the open market
  3. Feb 5, 20265% stakeFMR LLC reported a passive stake (13G) of 6.4%
  4. Feb 6, 2026Company filing · Form 8-K · ResultsReported its results
  5. Feb 9, 2026InsiderOfficer sold ~$532K of BIIB shares in the open market
  6. Feb 11, 2026Company filing · Form 8-K · Executive change, Other newsChanged a top executive or board member, and reported other company news“On February 11, 2026, Caroline Dorsa, Chair of the Biogen Inc. (“Biogen” or the “Company”) Board of Directors (the “Board”) announced that she would not stand for re-election to the Board at the 2026 Annual Meeting of Stockholders (the “Annual Meeting”).”
  7. Feb 12, 2026Insider · Their first buy on recordOfficer purchased ~$585 of BIIB shares in the open market
  8. Mar 11, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On March 11, 2026, Biogen Inc. (the “Company”) announced that Susan H. Alexander, Chief Legal Officer, will depart from the Company effective as of the end May, 2026.”
  9. Mar 26, 20265% stakeThe Vanguard Group reported a passive stake (13G)
  10. Mar 27, 2026 · this disclosureCongressDisclosed purchase of BIIB — reported range $1,001 - $15,000

What came next

  1. Mar 27, 2026FDAFDA drug approval: Spinraza
  2. Mar 31, 2026Company filing · Form 8-K · Material agreement, Other newsSigned an important agreement, and reported other company news
  3. Apr 6, 2026Company filing · Form 8-K · ResultsReported its results
  4. Apr 29, 2026Company filing · Form 8-K · ResultsReported its results
  5. Apr 29, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 7.5%
  6. May 6, 20265% stakeFMR LLC reported a passive stake (13G) of 8.7%
  7. May 11, 2026Congress · 1 personMembers of Congress: 2 purchases
  8. May 12, 2026CongressDisclosed purchase of BIIB — reported range $1,001 - $15,000
  9. May 14, 2026Company filing · Form 8-K · Material agreement, Acquisition or saleCompleted buying or selling a business or assets, and signed an important agreement (and 2 more items)“Pursuant to the Merger Agreement, on April 14, 2026, Purchaser commenced a tender offer (the “Offer”) to acquire any and all of the issued and outstanding Shares, in exchange for (i) $41.00 per Share, net to the seller in cash, without interest and subject to reduction for any applicable tax withholding (the “Cash Amount”), plus (ii) one contractual, non-transferable contingent value right per Share (each, a “CVR”)…”
  10. Jun 2, 2026CongressDisclosed sale of BIIB — reported range $15,001 - $50,000
  11. Jun 5, 20265% stakeFMR LLC reported a passive stake (13G) of 11.3%
  12. Jun 5, 2026CongressDisclosed purchase of BIIB — reported range $1,001 - $15,000
  13. Jul 1, 2026Company filing · Form 8-K · ResultsReported its results
  14. Jul 23, 2026Government · Federal Register noticeAdvisory Committee; Peripheral and Central Nervous System Drugs Advisory Committee; Termination and Reestablishment
View the official recordSenate eFD periodic transaction report

How to read Senate eFD periodic transaction report

The STOCK Act is a 2012 US law that requires members of Congress, and some senior staff, to publicly report their stock trades, and those of their spouse and dependent children, within 45 days.

Full guide: What is the STOCK Act?

What else is on file for Biogen

For Biogen, OQRO holds 2 insider filings (SEC Form 4 or Form 144), 3 Congress trade reports and 11 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its BIIB page.

Other recent filings by Sen. Alan Armstrong

The full history of Sen. Alan Armstrong is on the profile page.

How this filing works

Other disclosures at Biogen

Everything OQRO holds on this company is on its BIIB page.

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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