BIIB — what changed in the latest 10-Q
A section-by-section comparison of BIIB's newest periodic SEC filing (10-K/10-Q) against the prior same-form filing: paragraphs added and removed per section, with verbatim excerpts. Purely a deterministic text diff — no similarity scores, no directional read, not investment advice.
Comparing 10-Q · 2026-07-29 vs the prior 10-Q · 2026-04-29
| Section | Outcome | Added | Removed | Minor | Unchanged |
|---|---|---|---|---|---|
| MD&A | Text added/removed | +164 | −94 | ~46 | 98 |
| Market risk (Item 3) | Text added/removed | +1 | −2 | ~3 | 8 |
| Controls & procedures | Text added/removed | +2 | −1 | ~1 | 4 |
| Risk factors | Text added/removed | 0 | −1 | ~19 | 169 |
| Other information | Text added/removed | +2 | 0 | ~1 | 0 |
Counts are paragraphs; added/removed means text added or removed vs the prior filing — no direction or judgement implied.
Not shown (absent or not faithfully extractable): Legal proceedings
Representative excerpts
Up to 5 excerpts of about 300 characters per section, quoted verbatim from the two SEC filings.
MD&A
Text added vs the prior filing · source: 10-Q · 2026-07-29
The results and operations of Apellis, along with the estimated fair values of the assets acquired and liabilities assumed in the Apellis acquisition, have been included in our condensed consolidated financial statements since the closing of the Apellis acquisition on May 14, 2026.
Biogen is a global biopharmaceutical company focused on discovering, developing and delivering innovative therapies for people living with serious and complex diseases. We are focused on advancing our pipeline, including significant late stage programs, in neurology, specialized immunology and rare …
Our marketed products include VUMERITY, TYSABRI, TECFIDERA, AVONEX and PLEGRIDY for the treatment of MS; SPINRAZA for the treatment of SMA; SKYCLARYS for the treatment of FA; QALSODY for the treatment of ALS; SYFOVRE for the treatment of GA; and EMPAVELI for the treatment of PNH, C3G and primary IC-…
We also have collaborations with Eisai on the commercialization of LEQEMBI for the treatment of Alzheimer's disease and Supernus on the commercialization of ZURZUVAE for the treatment of PPD. We have certain business and financial rights with current and other potential anti-CD20 therapies, pursuant…
On May 14, 2026, we completed the acquisition of Apellis. As a result of this acquisition we acquired SYFOVRE for the treatment of geographic atrophy, or GA, an immune-mediated retinal disease; and EMPAVELI for the treatment of paroxysmal nocturnal hemoglobinuria, or PNH, a rare blood disorder, and …
Text removed vs the prior filing · source: 10-Q · 2026-04-29
Biogen is a global biopharmaceutical company focused on discovering, developing and delivering innovative therapies for people living with serious and complex diseases. We have a broad portfolio of medicines to treat MS, have introduced the first approved treatment for SMA, co-developed treatments t…
Our marketed products include VUMERITY, TYSABRI, TECFIDERA, AVONEX and PLEGRIDY for the treatment of MS; SPINRAZA for the treatment of SMA; SKYCLARYS for the treatment of FA; and QALSODY for the treatment of ALS.
We also have collaborations with Eisai on the commercialization of LEQEMBI for the treatment of Alzheimer's disease and Supernus on the commercialization of ZURZUVAE for the treatment of PPD. We have certain business and financial rights with respect to RITUXAN for the treatment of non-Hodgkin's lym…
We seek to ensure an uninterrupted supply of medicines to patients around the world. To that end, we regularly review our manufacturing capacity, capabilities, processes and facilities. In order to support our future growth and drug development pipeline, we expanded our large molecule production cap…
In the longer term, our revenue growth will depend upon the successful clinical development, regulatory approval and launch of new commercial products as well as additional indications for our existing products, our ability to obtain and maintain patents and other rights related to our marketed prod…
Market risk (Item 3)
Text added vs the prior filing · source: 10-Q · 2026-07-29
While the financial results of our global activities are reported in U.S. dollars, the functional currency for most of our foreign subsidiaries is their respective local currency. Fluctuations in the foreign currency exchange rates of the countries in which we do business will affect our operating r…
Text removed vs the prior filing · source: 10-Q · 2026-04-29
While the financial results of our global activities are reported in U.S. dollars, the functional currency for most of our foreign subsidiaries is their respective local currency. Fluctuations in the foreign currency exchange rates of the countries in which we do business will affect our operating r…
particular, as the U.S. dollar strengthens versus other currencies, the value of the non-U.S. revenue will decline when reported in U.S. dollars. The impact to net income as a result of a strengthening U.S. dollar will be partially mitigated by the value of non-U.S. expense, which will also decline …
Controls & procedures
Text added vs the prior filing · source: 10-Q · 2026-07-29
On May 14, 2026, we completed our acquisition of Apellis. The Apellis acquisition was accounted for as a business combination using the acquisition method of accounting. The results of operations of the acquired Apellis business have been included in our results of operations since May 14, 2026.
While we are currently in the process of evaluating and integrating Apellis' historical internal controls over financial reporting with ours, there were no changes in our internal control over financial reporting during the quarter ended June 30, 2026, that have materially affected, or are reasonabl…
Text removed vs the prior filing · source: 10-Q · 2026-04-29
There were no changes in our internal control over financial reporting during the quarter ended March 31, 2026, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
Risk factors
Text removed vs the prior filing · source: 10-Q · 2026-04-29
to protect and enforce any intellectual property rights underlying our products could have an adverse effect on our revenue or reputation as well as involve us in possible legal proceedings;
Other information
Text added vs the prior filing · source: 10-Q · 2026-07-29
10b5-1Non-Rule 10b5-1Total Shares to be Purchased or SoldExpiration Date
(1) Dr. Singhal's Rule 10b5-1 trading arrangement provides for the sale of (i) up to 20,400 shares of our common stock and (ii) all of the shares of our common stock to be acquired under our Employee Stock Purchase Plan during the term of the 10b5-1 trading arrangement. The number of shares to be ac…
How to read Risk Factors (Item 1A) in a 10-Q
A 10-Q risk-factor section usually takes one of three forms; this page classifies it as one of:
- Pointer — the filer states there have been no material changes and points back to the annual 10-K risk factors; there is no own risk text to compare this quarter.
- Partial update — the filer carves out specific updated risks ("except as set forth below"); the excerpts show exactly what is new this quarter.
- Restated in full — the quarter carries the complete risk-factor text. When the prior quarter was only a pointer there is no prior full text to diff against, so the page flags the section as restated instead.
This describes the filing structure only — it is never a judgement on whether risk went up or down.
Source: text-level diff of the two SEC EDGAR filings · deterministic (no AI-generated content) · for reference only · not investment advice