| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Reitan Colleen F | Director | 675 WEST KENDALL STREET, HENRI A. TERMEER SQUARE, CAMBRIDGE | By: Brett Budzinski, Attorney-in-Fact For: Colleen F. Reitan | 11 Sep 2025 | 0001740730 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ALNY | Common Stock | Options Exercise | $1,811,700 | +18,000 | +2323% | $100.65 | 18,775 | 09 Sep 2025 | Direct | F1 |
| transaction | ALNY | Common Stock | Sale | $752,489 | -1,645 | -8.8% | $457.44 | 17,130 | 09 Sep 2025 | Direct | F1, F2 |
| transaction | ALNY | Common Stock | Sale | $866,328 | -1,888 | -11% | $458.86 | 15,242 | 09 Sep 2025 | Direct | F1, F3 |
| transaction | ALNY | Common Stock | Sale | $645,001 | -1,403 | -9.2% | $459.73 | 13,839 | 09 Sep 2025 | Direct | F1, F4 |
| transaction | ALNY | Common Stock | Sale | $217,916 | -473 | -3.4% | $460.71 | 13,366 | 09 Sep 2025 | Direct | F1, F5 |
| transaction | ALNY | Common Stock | Sale | $1,057,797 | -2,290 | -17% | $461.92 | 11,076 | 09 Sep 2025 | Direct | F1, F6 |
| transaction | ALNY | Common Stock | Sale | $764,876 | -1,652 | -15% | $463.00 | 9,424 | 09 Sep 2025 | Direct | F1, F7 |
| transaction | ALNY | Common Stock | Sale | $371,024 | -799 | -8.5% | $464.36 | 8,625 | 09 Sep 2025 | Direct | F1, F8 |
| transaction | ALNY | Common Stock | Sale | $104,618 | -222 | -2.6% | $471.25 | 8,403 | 09 Sep 2025 | Direct | F1, F9 |
| transaction | ALNY | Common Stock | Sale | $389,131 | -823 | -9.8% | $472.82 | 7,580 | 09 Sep 2025 | Direct | F1, F10 |
| transaction | ALNY | Common Stock | Sale | $397,396 | -838 | -11% | $474.22 | 6,742 | 09 Sep 2025 | Direct | F1, F11 |
| transaction | ALNY | Common Stock | Sale | $451,582 | -951 | -14% | $474.85 | 5,791 | 09 Sep 2025 | Direct | F1, F12 |
| transaction | ALNY | Common Stock | Sale | $462,973 | -972 | -17% | $476.31 | 4,819 | 09 Sep 2025 | Direct | F1, F13 |
| transaction | ALNY | Common Stock | Sale | $564,847 | -1,183 | -25% | $477.47 | 3,636 | 09 Sep 2025 | Direct | F1, F14 |
| transaction | ALNY | Common Stock | Sale | $694,072 | -1,450 | -40% | $478.67 | 2,186 | 09 Sep 2025 | Direct | F1, F15 |
| transaction | ALNY | Common Stock | Sale | $664,656 | -1,386 | -63% | $479.55 | 800 | 09 Sep 2025 | Direct | F1, F16 |
| transaction | ALNY | Common Stock | Sale | $12,024 | -25 | -3.1% | $480.98 | 775 | 09 Sep 2025 | Direct | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ALNY | Stock Option (right to buy) | Options Exercise | $0 | -18,000 | -100% | $0.000000 | 0 | 09 Sep 2025 | Common Stock | 18,000 | $100.65 | Direct | F1, F17 |
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
| Id | Content |
|---|---|
| F1 | This transaction was made pursuant to a Rule 10b5-1(c) trading plan adopted by the Reporting Person on June 10, 2025. |
| F2 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $456.93 to $457.91. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F3 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $458.22 to $459.09. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F4 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $459.29 to $460.22. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F5 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $460.35 to $461.26. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F6 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $461.42 to $462.41. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F7 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $462.73 to $463.52. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F8 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $464.18 to $464.96. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F9 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $470.77 to $471.75. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F10 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $472.37 to $473.30. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F11 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $473.48 to $474.48. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F12 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $474.58 to $475.06. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F13 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $475.85 to $476.79. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F14 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $477.05 to $477.88. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F15 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $478.33 to $479.30. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F16 | The price reported represents the weighted average sales price of shares sold in multiple transactions at prices ranging from $479.35 to $479.90. The reporting person will provide to the issuer, any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. |
| F17 | This stock option was fully vested and exercisable as of June 1, 2021. |