ALNYLAM PHARMACEUTICALS INC - NOTE 1.000% 9/1 Institutional Ownership

13F Institutional Holders and Ownership History from Q3 2023 to Q4 2025

Type / Class
Debt / NOTE 1.000% 9/1
Market price (% of par)
147.25%
All holders as of 30 Sep 2025
Q3 2025
Total 13F principal
$352,271,743
Total reported market value
$579,144,349
Principal change
-$564,923,787
Market value change
-$747,537,213
Number of holders
43
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

As of 30 Sep 2025, 43 institutional investors reported holding $352,271,743 in principal (par value) of ALNYLAM PHARMACEUTICALS INC - NOTE 1.000% 9/1.

Institutional Holders of ALNYLAM PHARMACEUTICALS INC - NOTE 1.000% 9/1 across Reporting Periods

Period Principal Value Change Price (% of par) (Median) Investors
2025 Q4 $2,222,000 $4,318,000 -$59,899 147.25% 5
2025 Q3 $352,271,743 $579,144,349 -$747,537,213 164.35% 43
2025 Q2 $981,078,530 $1,277,359,156 -$13,039,270 129.9% 70
2025 Q1 $969,592,530 $1,118,503,734 +$88,986,381 115.38% 69
2024 Q4 $922,607,020 $983,794,436 +$11,008,622 106.55% 67
2024 Q3 $904,121,020 $1,058,866,946 -$27,889,010 117.0% 58
2024 Q2 $905,137,980 $978,913,598 -$105,053,955 107.81% 65
2024 Q1 $1,012,540,800 $955,060,150 +$37,637,775 94.06% 69
2023 Q4 $979,138,050 $970,383,077 +$19,195,483 98.75% 67
2023 Q3 $976,407,604 $910,151,140 +$910,150,772 92.75% 55