Chirfi Guindo

MRK

Chirfi Guindo serves as officer: Chief Marketing Officer at Merck & Co., Inc. (MRK). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

6 trades

$6.88M

Net Position

Net Seller

$6.88M

Companies Traded

MRK, BIIB

Active Period

Jun 2021 – Feb 2026

6 total trades

Most Recent

Sell MRK

Feb 12, 2026 · $1.21M

Chirfi Guindo's Insider Trading at Merck & Co., Inc. (MRK)

Buys

0 · $0.00

Sells

3 · $4.84M

Total Shares Bought

Total Shares Sold

40,000

MRK Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Feb 12, 2026	Sell	10,000	$121.46	$1.21M	60,615
Feb 9, 2026	Sell	10,000	$118.41	$1.18M	70,615
Feb 6, 2026	Sell	20,000	$121.88	$2.44M	80,615

Chirfi Guindo's Insider Trading at Biogen Inc. (BIIB)

Buys

0 · $0.00

Sells

3 · $2.05M

Total Shares Bought

Total Shares Sold

6,308

BIIB Price Chart

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Date	Type	Shares	Avg Price	Value
Feb 18, 2022	Sell	879	$209.79	$184.4K
Feb 12, 2022	Sell	2,342	$214.59	$502.6K
Jun 7, 2021	Sell	3,087	$440.00	$1.36M

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