Reporting Owner Activity for Alfred Sandrock

Location
Cambridge, MA
Ownership summary

The estimated value of Alfred Sandrock's disclosed insider holdings is at least $4,350,704 as of 03 Apr 2026.

Values are based on parsed SEC Forms 3/4/5 and should be verified against the source filing.

Signature
/s/ Gregory L. Shiferman, as Attorney-in-Fact for Alfred Sandrock
Source filings
Open source filing history

Follow Filing Activity

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Key facts

  • Alfred Sandrock has 2 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $4,350,704.
  • Recent insider filing activity is available below.

Change

  • Largest disclosed position: BIOGEN INC. ($2,521,940).
  • Past-year value change for that position: .

Research use

  • This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
  • You can cross-check role, issuer, and filing chronology directly against the SEC source.

Evidence

Filed on Form 4

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Reported issuer positions for Alfred Sandrock

Insider Transactions Reported by Alfred Sandrock:

Sym Company Class Transaction % Reported value Reported price Shares Shares after Date Ownership
An asterisk next to the price means the reported price is likely invalid.
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