ALNYLAM PHARMACEUTICALS, INC.
Total Trades
147
Buys
1
Sells
77
Largest Trade
N/A
Insiders
14
Institutional Funds
719
Inst. Value
$1M+
Activist Filings
18
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Tanguler Tolga | EVP | SELL | $100K–$500K | 1K | $148.06 | Feb 20, 2024 |
| Greenstreet Yvonne | CEO | GRANT | N/A | 17K | — | Feb 20, 2024 |
| Greenstreet Yvonne | CEO | SELL | $1M+ | 7K | $148.06 | Feb 20, 2024 |
| Franchini Indrani Lall | EVP, CLO & Secretary | EXERCISE | N/A | 5K | — | Feb 5, 2024 |
| Franchini Indrani Lall | EVP, CLO & Secretary | SELL | $100K–$500K | 2K | $170.99 | Feb 5, 2024 |
| BONNEY MICHAEL W | Director | SELL | $1M+ | 30K | $195.00 | Dec 29, 2023 |
| BONNEY MICHAEL W | Director | EXERCISE | $1M+ | 30K | $96.45 | Dec 29, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | GRANT | N/A | 8K | — | Aug 7, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | SELL | $1M+ | 8K | $184.78 | Aug 7, 2023 |
| Poulton Jeffrey V. | CFO | GRANT | N/A | 8K | — | Aug 7, 2023 |
| Poulton Jeffrey V. | CFO | SELL | $500K+ | 3K | $185.85 | Aug 7, 2023 |
| Greenstreet Yvonne | CEO | SELL | $500K+ | 4K | $185.85 | Aug 7, 2023 |
| Greenstreet Yvonne | CEO | GRANT | N/A | 9K | — | Aug 7, 2023 |
| Vaishnaw Akshay | President | GRANT | N/A | 9K | — | Aug 7, 2023 |
| Vaishnaw Akshay | President | SELL | $500K+ | 4K | $185.85 | Aug 7, 2023 |
| BONNEY MICHAEL W | Director | EXERCISE | N/A | 22K | — | Aug 4, 2023 |
| BONNEY MICHAEL W | Director | SELL | $1M+ | 6K | $185.38 | Aug 4, 2023 |
| Greenstreet Yvonne | CEO | GRANT | N/A | 17K | — | Apr 28, 2023 |
| Greenstreet Yvonne | CEO | SELL | $1M+ | 8K | $194.59 | Apr 28, 2023 |
| Poulton Jeffrey V. | CFO | SELL | $100K–$500K | 977 | $194.59 | Apr 28, 2023 |
| Poulton Jeffrey V. | CFO | GRANT | N/A | 3K | — | Apr 28, 2023 |
| Tanguler Tolga | EVP | SELL | $100K–$500K | 1K | $194.59 | Apr 28, 2023 |
| Tanguler Tolga | EVP | GRANT | N/A | 3K | — | Apr 28, 2023 |
| Vaishnaw Akshay | President | SELL | $100K–$500K | 2K | $194.59 | Apr 28, 2023 |
| Vaishnaw Akshay | President | GRANT | N/A | 5K | — | Apr 28, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | SELL | $500K+ | 4K | $197.12 | Apr 28, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | GRANT | N/A | 4K | — | Apr 28, 2023 |
| Franchini Indrani Lall | EVP, CLO & Secretary | SELL | $500K+ | 4K | $210.00 | Apr 10, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | SELL | $1M+ | 18K | $200.00 | Mar 7, 2023 |
| Garg Pushkal | CMO & EVP Dev & Me… | EXERCISE | $100K–$500K | 5K | $96.45 | Mar 7, 2023 |
| Vaishnaw Akshay | President | SELL | $1M+ | 38K | $215.97 | Feb 14, 2023 |
| Vaishnaw Akshay | President | EXERCISE | $1M+ | 31K | $63.00 | Feb 14, 2023 |
| Franchini Indrani Lall | EVP, CLO & Secretary | SELL | $100K–$500K | 2K | $226.01 | Feb 3, 2023 |
| Franchini Indrani Lall | EVP, CLO & Secretary | EXERCISE | N/A | 5K | — | Feb 3, 2023 |
| Tanguler Tolga | EVP | SELL | $1M+ | 5K | $230.19 | Feb 3, 2023 |
| Tanguler Tolga | EVP | EXERCISE | N/A | 5K | — | Feb 3, 2023 |
| Ausiello Dennis A | Director | EXERCISE | $1M+ | 23K | $71.09 | Nov 23, 2022 |
| Ausiello Dennis A | Director | SELL | $1M+ | 23K | $220.00 | Nov 23, 2022 |
| SHARP PHILLIP A | Director | EXERCISE | $1M+ | 34K | $33.77 | Aug 17, 2022 |
| SHARP PHILLIP A | Director | SELL | $1M+ | 34K | $230.49 | Aug 17, 2022 |
| Tanguler Tolga | EVP | GRANT | N/A | 4K | — | Aug 5, 2022 |
| Tanguler Tolga | EVP | SELL | $500K+ | 4K | $214.18 | Aug 5, 2022 |
| Tanguler Tolga | EVP | SELL | $100K–$500K | 2K | $150.00 | Jul 7, 2022 |
| PAUL STEVEN M | Director | SELL | $1M+ | 15K | $170.69 | Apr 5, 2022 |
| PAUL STEVEN M | Director | EXERCISE | $100K–$500K | 15K | $11.33 | Apr 5, 2022 |
| SHARP PHILLIP A | Director | EXERCISE | $100K–$500K | 30K | $11.33 | Feb 11, 2022 |
| SHARP PHILLIP A | Director | SELL | $1M+ | 30K | $150.00 | Feb 11, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 719 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Capital World Investors | 16.3M | $1M+ | SH |
| Capital Research Global Investors | 6.8M | $1M+ | SH |
| STATE STREET CORP | 3.2M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3M | $1M+ | SH |
| NORGES BANK | 2.3M | $1M+ | SH |
| DODGE & COX | 2.0M | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 1.5M | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.1M | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 877K | $1M+ | SH |
| BAILLIE GIFFORD & CO | 654K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 648K | $1M+ | SH |
| Clearbridge Investments, LLC | 597K | $1M+ | SH |
| LOOMIS SAYLES & CO L P | 475K | $1M+ | SH |
| 1832 Asset Management L.P. | 440K | $1M+ | SH |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 401K | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 389K | $1M+ | SH |
| WELLS FARGO & COMPANY/MN | 370K | $1M+ | SH (Call) |
| Swiss National Bank | 359K | $1M+ | SH |
| Squarepoint Ops LLC | 351K | $1M+ | SH |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 348K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Nov 5, 2025
12.8%
16.8M shares
SC 13G/A · Apr 7, 2025
10.0%
13.1M shares
Capital Research Global Investors
SC 13G · Feb 13, 2025
5.4%
7.0M shares
SC 13G/A · Nov 12, 2024
11.5%
14.8M shares
Wellington Management Group LLP
SC 13G/A · Nov 8, 2024
3.9%
5.0M shares
SC 13G/A · Aug 12, 2024
10.5%
13.3M shares
Baillie Gifford & Co (Scottish partnership)
SC 13G/A · Jul 5, 2024
4.8%
6.0M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
9.5%
11.9M shares
Capital World Investors 95-1411037
SC 13G/A · Feb 9, 2024
13.1%
16.4M shares
Baillie Gifford & Co (Scottish partnership)
SC 13G/A · Jan 29, 2024
5.5%
7.0M shares
SC 13G/A · Jan 26, 2024
6.8%
8.5M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2023
3.3%
4.1M shares
Capital World Investors 95-1411037
SC 13G/A · Feb 13, 2023
13.5%
16.6M shares
SC 13G/A · Jan 31, 2023
7.0%
8.7M shares
Baillie Gifford & Co (Scottish partnership)
SC 13G/A · Jan 19, 2023
7.7%
9.4M shares
Capital World Investors 95-1411037
SC 13G · Sep 9, 2022
10.7%
12.8M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G · Feb 14, 2022
5.4%
6.5M shares
Baillie Gifford & Co (Scottish partnership)
SC 13G/A · Jan 18, 2022
8.9%
10.6M shares