Filer Snapshot

BIOGEN INC.

CIK 0000875045. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

137

Latest filing

11 Jun 2026

Industry

Biological Products, (No Disgnostic Substances)

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for APLS. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

—

Populates from the latest parsed 13F information table.

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13D/G large stake

APLS

14 May 2026 · 0% ownership

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Source: SEC Forms 3/4/5

4 filed on 11 Jun 2026 for CIK 0000875045.

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Listed symbols
BIIB on Nasdaq
Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

Forms 3/4/5 positions$6.75M

Reporting-owner positions with enough filing detail to estimate value.

Forms 3/4/5 position value

3/4/5
$6.75M

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Source: Forms 3/4/5Confidence: Estimated when price data is available

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

SGMO

Largest active 13D stakes

Active large-stake positions disclosed in parsed Schedule 13D filings.

APLS SAGE
How to read these SEC ownership signals
  • Read each filing family separately: Form 13F, Schedules 13D/G, and Forms 3/4/5 answer different SEC disclosure questions and should not be blended into one ownership total.
  • Use 13F values for visible U.S.-listed equity portfolios, 13D/G rows for large beneficial-owner stakes, and Forms 3/4/5 rows for reporting-owner positions and transactions.
  • Open the linked research path when you need the filing, CIK, issuer, CUSIP, date, or source trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 2 identity fields
SEC industry group
Biological Products, (No Disgnostic Substances) (Office of Life Sciences)
Business address
225 Binney Street, Cambridge, MA, 02142
EDGAR profile Static EDGAR fields kept behind disclosure so the main profile stays readable. 3 profile fields available
Incorporated in
DE
Fiscal year end
31 December
Former names on EDGAR
BIOGEN IDEC INC. (to 20 Mar 2015), BIOGEN IDEC INC (to 25 Apr 2007), IDEC PHARMACEUTICALS CORP / DE (to 12 Nov 2003), IDEC PHARMACEUTICALS CORP / CA (to 14 Feb 1997)

Filer intelligence

What SEC filings say about BIOGEN INC.

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • 2 recent 13D/G stake rows found; top row is APLS at 0% ownership.
  • Forms 3/4/5 show insider context for SGMO worth $6.75M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes 2 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 3 rows

Officer, director, and 10% owner holdings or transactions.

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13D/G large-stake context

APLS

14 May 2026 · Common Stock, par value $0.0001 per share

0%
Issuer page 13D/G history

SAGE

30 Jul 2025 · Common Stock, par value $0.0001 per share

0%
Issuer page 13D/G history

Forms 3/4/5 insider context

SGMO

26 Sep 2023 · 10% owner

$6.75M
Issuer page Owner page

APLS

31 Mar 2026

$0
Issuer page Owner page

RETA

28 Jul 2023

Issuer page Owner page

Latest update

What changed recently for BIOGEN INC.

New filing available

Latest Schedule 13D/G period: 14 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

14 May 2026

Page type

Filer profile

Latest period

14 May 2026

Schedule 13D/G context is visible from filings filed on 14 May 2026.

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Benchmark Context

Benchmark context for this company

BIOGEN INC. has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.

Why this is notable

Latest Schedule 13D/G period: 14 May 2026. That gives you a fresh baseline before you compare this company with peers.

  • Latest company facts filing date: 29 Apr 2026.
  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0000875045 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
137
First seen
31 Jan 2024
Latest filing
11 Jun 2026
Entity
Company

Observed form types

10-K 10-Q 3 4 SCHEDULE 13D SCHEDULE 13D/A SCHEDULE 13G

CIK-linked evidence first

BIOGEN INC. SEC filings BIOGEN INC. 13D/G history BIOGEN INC. owner filings BIOGEN INC. insider transactions BIOGEN INC. company facts Open SEC filing index

Industry context: Biological Products, (No Disgnostic Substances).

Latest Filings

Showing the latest 12 of 137 SEC filings for BIOGEN INC..

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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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4

4 filing

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
14 May 2026
Reporting date
Not listed
SEC evidence
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4

4 filing

Filing date
05 May 2026
Reporting date
01 May 2026
SEC evidence
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10-Q

10-Q filing

Filing date
29 Apr 2026
Reporting date
31 Mar 2026
SEC evidence
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Next action
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