SEC Form 4 · accession 0001553878-15-000032

ALNYLAM PHARMACEUTICALS, INC. · ALNY

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Chief Executive Officer · Director

Period of report

Dec 2, 2015

Accepted (ET)

Dec 4, 2015 · 5:10 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001178670

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Dec 2, 2015	M	58,689	$13.12	A	192,078	D
Common Stock^F2	Dec 2, 2015	S	9,983	$103.1518	D	182,095	D
Common Stock^F3	Dec 2, 2015	S	10,784	$104.0005	D	171,311	D
Common Stock^F4	Dec 2, 2015	S	20,238	$105.1582	D	151,073	D
Common Stock^F5	Dec 2, 2015	S	16,984	$106.0172	D	134,089	D
Common Stock^F6	Dec 2, 2015	S	700	$106.6025	D	133,389	D
Common Stock^F7	holding	—	—		—	2,750	I	By Managed Account

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Option (Right to Buy)^F8,F1	$13.12	Dec 2, 2015	M	58,689	D	—	Dec 7, 2015	Common Stock	58,689	0	D

F1The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 18, 2015. The 58,689 options exercised and sold by the reporting person were due to expire December 7, 2015.
F2Sale prices ranged from $102.51 to $103.50.
F3Sale prices ranged from $103.51 to $104.47.
F4Sale prices ranged from $104.58 to $105.57.
F5Sale prices ranged from $105.58 to $106.57.
F6Sale prices ranged from $106.58 to $106.6375.
F7The reporting person owns 2,750 shares of ALNY common stock under the ALNY 401(k) plan as a result of the ALNY 401(k) matching contribution program.
F8The stock option vested as to 25% of the shares on the first anniversary of the date of grant and as to an additional 6.25% of the shares each successive three month period thereafter.