Vault-13

ALNYLAM PHARMACEUTICALS INC ALNY 1 09.15.27

NOTE 1.000% 9/1 · US DOMESTIC · CUSIP 02043QAB3

47 institutional holders -1 vs Q4 2025
14,465,86014.5m shares reported held*
$450.3mreported value*
10 new 12 added 10 reduced 11 sold out net sold ≈ $10.6m (+1.3m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $31.13.

Trends to Q1 2026

Institutional holders

Managers reporting a position, each quarter

0255075Q3 23: 57Q4 23: 70Q1 24: 72Q2 24: 68Q3 24: 60Q4 24: 68Q1 25: 73Q2 25: 71Q3 25: 48Q4 25: 48Q1 26: 4747Q3 23Q1 24Q3 24Q1 25Q3 25Q1 26
Numbers
QuarterHolders
Q3 202357
Q4 202370
Q1 202472
Q2 202468
Q3 202460
Q4 202468
Q1 202573
Q2 202571
Q3 202548
Q4 202548
Q1 202647

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
50050Q2 24: 29 bought or addedQ2 24: 37 cut or sold outQ3 24: 25 bought or addedQ3 24: 39 cut or sold outQ3 24Q4 24: 24 bought or addedQ4 24: 31 cut or sold outQ1 25: 32 bought or addedQ1 25: 30 cut or sold outQ1 25Q2 25: 25 bought or addedQ2 25: 38 cut or sold outQ3 25: 20 bought or addedQ3 25: 50 cut or sold outQ3 25Q4 25: 20 bought or addedQ4 25: 21 cut or sold outQ1 26: 22 bought or addedQ1 26: 21 cut or sold outQ1 26
Numbers
QuarterBought or addedCut or sold out
Q2 20242937
Q3 20242539
Q4 20242431
Q1 20253230
Q2 20252538
Q3 20252050
Q4 20252021
Q1 20262221

Biggest buyers

STEELHEAD PARTNERS LLC New +60,000,000+60.0m
DeepCurrents Investment Group LLC New +24,000,000+24.0m
CSS LLC/IL New +18,563,000+18.6m
BNP PARIBAS FINANCIAL MARKETS Added +15,000,000+15.0m
BANK OF AMERICA CORP /DE/ Added +10,901,000+10.9m
TWO SIGMA INVESTMENTS, LP New +6,000,000+6.0m
CITIGROUP INC Added +5,038,000+5.0m
Amundi New +5,000,000+5.0m
BNP PARIBAS ASSET MANAGEMENT Holding S.A. Added +5,000,000+5.0m
SSI INVESTMENT MANAGEMENT LLC New +4,098,000+4.1m

Biggest sellers

VOYA INVESTMENT MANAGEMENT LLC Sold out -139,790,000-139.8m
LORD, ABBETT & CO. LLC Reduced -6,533,000-6.5m
MANUFACTURERS LIFE INSURANCE COMPANY, THE Reduced -5,000,000-5.0m
Amundi Sold out -5,000,000-5.0m
SSI INVESTMENT MANAGEMENT LLC Sold out -4,098,000-4.1m
Nicholas Investment Partners, LP Sold out -3,165,000-3.2m
STATE OF WISCONSIN INVESTMENT BOARD Sold out -3,000,000-3.0m
WESTWOOD HOLDINGS GROUP INC Sold out -2,100,000-2.1m
FMR LLC Reduced -1,050,000-1.1m
GOLDMAN SACHS GROUP INC Reduced -1,045,000-1.0m

Holders, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 STEELHEAD PARTNERS LLC 5.54% of their portfolio SEATTLE, WA 60,000,00060.0m $77.1m $77.1m 5.54% New
2 BNP PARIBAS FINANCIAL MARKETS 0.03% of their portfolio PARIS, I0 32,318,00032.3m $41.4m $41.4m 0.03% Added +15.0m +15,000,000
3 Alberta Investment Management Corp 0.20% of their portfolio EDMONTON, A0 25,000,00025.0m $32.1m $32.1m 0.20% Unchanged
4 DeepCurrents Investment Group LLC 1.27% of their portfolio NEW YORK, NY 24,000,00024.0m $30.9m $30.9m 1.27% New
5 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 22,770,00022.8m $29.3m $29.3m 0.00% Added +850.0k +850,000
6 CSS LLC/IL 1.33% of their portfolio CHICAGO, IL 18,563,00018.6m $23.9m $23.9m 1.33% New
7 FMR LLC 0.00% of their portfolio BOSTON, MA 18,444,00018.4m $23.6m $23.6m 0.00% Reduced -1.1m -1,050,000
8 BlackRock, Inc. 0.00% of their portfolio New York, NY 16,600,00016.6m $21.3m $21.3m 0.00% Added +3.5m +3,550,000
9 MacKay Shields LLC 0.70% of their portfolio New York, NY 14,844,00014.8m $19.1m $19.1m 0.70% Added +6.0k +6,000
10 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.02% of their portfolio Toronto, A6 13,800,00013.8m $17.8m $17.8m 0.02% Reduced -5.0m -5,000,000
11 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 10,906,00010.9m $14.0m $14.0m 0.00% Added +10.9m +10,901,000
12 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.01% of their portfolio Paris, I0 9,750,0009.8m $12.6m $12.6m 0.01% Added +5.0m +5,000,000
13 Universal- Beteiligungs- und Servicegesellschaft mbH 0.02% of their portfolio FRANKFURT AM MAIN, 2M 8,215,0008.2m $10.6m $10.6m 0.02% Added +3.7m +3,670,000
14 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 6,000,0006.0m $7.7m $7.7m 0.01% New
15 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 5,657,0005.7m $7.2m $7.2m 0.00% Added +5.0m +5,038,000
16 Warberg Asset Management LLC 1.87% of their portfolio WINNETKA, IL 5,002,0005.0m $6.4m $6.4m 1.87% Unchanged
17 Amundi 0.00% of their portfolio Paris, I0 5,000,0005.0m $6.4k $6.4k 0.00% New
18 SSI INVESTMENT MANAGEMENT LLC 0.36% of their portfolio Los Angeles, CA 4,098,0004.1m $5.3m $5.3m 0.36% New
19 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 3,120,0003.1m $4.0m $4.0m 0.00% Added +3.0m +3,000,000
20 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 2,500,0002.5m $3.2m $3.2m 0.00% Unchanged
21 FRANKLIN RESOURCES INC 0.00% of their portfolio San Mateo, CA 2,235,0002.2m $2.9m $2.9m 0.00% Unchanged
22 NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.00% of their portfolio PHILADELPHIA, PA 2,090,0002.1m $2.7m $2.7m 0.00% Unchanged
23 EFG International AG 0.06% of their portfolio Zurich, V8 2,000,0002.0m $2.6m $2.6m 0.06% New
24 Union Bancaire Privee, UBP SA 0.03% of their portfolio GENEVA 1, V8 1,980,0002.0m $2.2m $2.2m 0.03% Unchanged
25 LORD, ABBETT & CO. LLC 0.01% of their portfolio JERSEY CITY, NJ 1,204,0001.2m $1.5m $1.5m 0.01% Reduced -6.5m -6,533,000
26 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,050,0001.1m $1.3m $1.3m 0.00% Reduced -153.0k -153,000
27 KIM, LLC 0.19% of their portfolio WICHITA, KS 1,000,0001.0m $1.3m $1.3m 0.19% New
28 AGF MANAGEMENT LTD 0.01% of their portfolio TORONTO, A6 950,000950.0k $1.2m $1.2m 0.01% Unchanged
29 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 910,000910.0k $1.2m $1.2m 0.00% Reduced -518.0k -518,000
30 Jefferies Financial Group Inc. 0.01% of their portfolio NEW YORK, NY 681,000681.0k $874.4k $874.4k 0.01% Added +61.0k +61,000
31 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 374,000374.0k $479.3k $479.3k 0.00% Reduced -1.0m -1,045,000
32 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 251,000251.0k $321.7k $321.7k 0.00% Unchanged
33 Central Pacific Bank - Trust Division 0.04% of their portfolio HONOLULU, HI 224,000224.0k $287.1k $287.1k 0.04% Unchanged
34 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 215,000215.0k $276.7k $276.7k 0.00% New
35 OPPENHEIMER ASSET MANAGEMENT INC. 0.00% of their portfolio NEW YORK, NY 81,00081.0k $103.8k $103.8k 0.00% Reduced -1.0k -1,000
36 VIRTUS ADVISERS, LLC 0.02% of their portfolio HARTFORD, CT 36,00036.0k $46.1k $46.1k 0.02% Unchanged
37 Boussard & Gavaudan Investment Management LLP 3.92% of their portfolio London, X0 32,00032.0k $40.8m $40.8m 3.92% Added +11.0k +11,046
38 STEPHENS INC /AR/ 0.00% of their portfolio LITTLE ROCK, AR 24,00024.0k $30.8k $30.8k 0.00% Unchanged
39 UBS Group AG 0.00% of their portfolio ZURICH, V8 22,67022.7k $29.1k $29.1k 0.00% Added +22.0k +22,000
40 Balboa Wealth Partners 0.00% of their portfolio SCOTTSDALE, AZ 14,00014.0k $18.0k $18.0k 0.00% Reduced -1.0k -1,000
41 MML INVESTORS SERVICES, LLC 0.00% of their portfolio SPRINGFIELD, MA 10,00010.0k $12.8k $12.8k 0.00% Unchanged
42 LOOMIS SAYLES & CO L P 0.00% of their portfolio BOSTON, MA 4,8604.9k $1.6m $1.6m 0.00% Reduced -4.2k -4,183
43 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 2,0002.0k $2.6k $2.6k 0.00% Unchanged
44 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 2,0002.0k $3.0k $3.0k 0.00% New
45 Alken Asset Management Ltd 2.30% of their portfolio LONDON, X0 1,0001.0k $1.3m $1.3m 2.30% Unchanged
46 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 1,0001.0k $1.3k $1.3k 0.00% Reduced -1.0k -1,000
47 Erste Asset Management GmbH 0.00% of their portfolio VIENNA, C4 00 $0 $0 0.00% Unchanged