Public research preview
Rob Bresnahan, Representative disclosure: Biogen Inc. - Common Stock (BIIB)
Disclosed a buy transaction in Biogen Inc. - Common Stock (BIIB). Use this page to inspect source evidence, confidence scores, filing delay, and post-disclosure price movement before deciding whether to research the signal further.
This public page is for public-disclosure research only. It is not investment advice and does not place orders. Verify the official source before relying on any signal.
Evidence passport
Official-source context and parser confidence before any simulation or alert decision.
- Source
- House STOCK Act disclosures
- Published
- 27 Mar 2025, 00.00
- Parser confidence
- 94%
- Instrument mapping
- 95%
- Filing delay
- 30 days
Timeline
Transaction date
25 Feb 2025
Public disclosure
27 Mar 2025
Now
Tracked today
Filing delay: 30 days
Price movement
Complete coverage
- Provider
- Yahoo Finance daily close
- Fetched
- 10 Jun 2026
Stock path
BIIB from pre-transaction context through latest close.
Bought
25 Feb 2025 · 143,46 USD
- Observed transaction close
- 143,46
- Observed disclosure close
- 140,33
- Observed latest close
- 199,1
- Pre-disclosure move
- -2.2%
- Post-disclosure move
- +41.9%
- Market-adjusted move
- +41.9%
Why Copy Window is Probably too late
Supporting factors
- Parsed buy disclosure for ordinary shares from House STOCK Act disclosures.
- Reported amount is $1,001 - $15,000.
- Post-disclosure move is calculated from Yahoo Finance daily close daily closes.
Cautions
- Yahoo Finance daily close coverage is end-of-day and should be verified against the official price source.
- Review the original source document before making any investment decision.
Source document
House STOCK Act disclosures, published 27 Mar 2025, 00.00
- Parser confidence
- 94%
- Instrument mapping
- 95%