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Chirfi Guindo

CIK 1722753 · EVP, Access, Policy & Comms · last filed 2026-08-13

Chirfi Guindo is an EVP, Access, Policy & Comms who has filed 39 SEC Form 4 insider transactions across 3 companies since 2017. The most recent filing, for MRK, was dated Aug 13, 2026. Across all open-market trades the lifetime net is −$11.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.1M across reported positions. 23 SEC filings were submitted jointly with Merck & Co., Inc.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$7.07M

Companies

3

Total Filings

39

Lifetime Open-Market Net

-$11.47M

Filer Profile

Reported Address
C/O BIOGEN INC.
225 BINNEY ST.
CAMBRIDGE, MA 02142
Related Filers
Merck & Co., Inc. — 23 joint filings, latest 2026-08-13
BIOGEN INC. — 15 joint filings, latest 2022-02-23
Beam Therapeutics Inc. — 4 joint filings, latest 2026-06-05
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MRK EVP, Access, Policy & Comms 36,670 $143.93 $5.28M -$10.12M 17 2026-08-13
BEAM Director — $23.99 — $0 3 2026-06-05
BIIB Head of Glob Prod Strat & Com 8,243 $217.15 $1.79M -$1.36M 14 2022-02-23

Recent Filings

39 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-13 MRK Notice (144) −10,000 -$1.35M EDGAR
2026-08-13 MRK Sell (S) −10,000 -$1.35M EDGAR
2026-08-07 MRK Sell (S) −15,000 -$1.97M EDGAR
2026-08-07 MRK Sell (S) −15,000 -$1.97M EDGAR
2026-08-06 MRK Notice (144) −15,000 -$1.97M EDGAR
2026-06-05 BEAM Grant (A) — $0 EDGAR
2026-05-07 MRK Grant (A) — $0 EDGAR
2026-05-01 MRK Mixed +998 $109.8K EDGAR
2026-02-13 MRK Notice (144/A) −20,000 -$2.37M EDGAR
2026-02-12 MRK Sell (S) −10,000 -$1.21M EDGAR
Showing 1–10 of 39
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.