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D. E. Shaw & Co., Inc.

Position in ALNY — Alnylam Pharmaceuticals, Inc.

CIK 1009207 New York, NY

Position in ALNY

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$332,369,932
-$18,041,911 QoQ
Shares Held
1,104,109
+4.3% QoQ
Ownership
0.825%
of shares outstanding
% of Portfolio
0.22%
of 13F equity value
Holder Rank
#21
of 784 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 92% Shared 0% None 8%

Common Shares in ALNY Over Time

Shares Held

Position Value (USD)

Derivatives in ALNY

reported options exposure · as of Jun 30, 2026
CallValue
$129,533,209
CallShares
430,300
PutValue
$0
PutShares
0

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Jun 30, 2026

D. E. Shaw & Co., Inc. holds $5,017,559,982 across 217 Biotechnology names. ALNY ranks #2 (6.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 ALNY
Alnylam Pharmaceuticals, Inc.
This page
1,104,109 $332,369,932

All Filings in ALNY

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $129,533,209 430,300
2026-06-30 $332,369,932 1,104,109
2026-03-31 $2,150,655 6,500
2026-03-31 $350,411,843 1,059,062
2026-03-31 $135,259,656 408,800
2025-12-31 $715,770 1,800
2025-12-31 $157,946,580 397,200
2025-12-31 $176,752,640 444,493
2025-09-30 $14,546,400 31,900
2025-09-30 $410,400 900
2025-09-30 $90,934,152 199,417
2025-06-30 $521,744 1,600
2025-06-30 $35,307,719 108,276
2025-03-31 $432,032 1,600
2025-03-31 $78,268,536 289,862
2024-12-31 $85,437,531 363,085
2024-12-31 $5,553,316 23,600
2024-12-31 $1,082,426 4,600
2024-09-30 $1,265,138 4,600
2024-09-30 $6,490,708 23,600
2024-09-30 $91,393,843 332,305
2024-06-30 $1,117,800 4,600
2024-06-30 $5,734,800 23,600
2024-06-30 $67,893,714 279,398
2024-03-31 $15,451,187 103,387
2024-03-31 $6,381,515 42,700
2024-03-31 $15,886,535 106,300
2023-12-31 $18,288,076 95,544
2023-12-31 $880,486 4,600
2023-12-31 $12,824,470 67,000
2023-09-30 $10,023,860 56,600
2023-09-30 $36,144,692 204,092
2023-06-30 $47,156,783 248,272
2023-06-30 $8,243,396 43,400
2023-03-31 $46,343,029 231,345
2023-03-31 $8,693,888 43,400
2022-12-31 $12,690,510 53,400
2022-12-31 $5,941,250 25,000
2022-12-31 $41,925,262 176,416
2022-09-30 $8,006,400 40,000
2022-09-30 $30,252,982 151,144
2022-09-30 $5,004,000 25,000
2022-06-30 $3,646,250 25,000
2022-06-30 $19,824,369 135,923
2022-06-30 $5,834,000 40,000
2022-03-31 $2,430,245 14,883
2022-03-31 $4,898,700 30,000
2022-03-31 $4,082,250 25,000
2021-12-31 $5,087,400 30,000
2021-12-31 $4,239,500 25,000