Which funds own ALNY
Alnylam Pharmaceuticals Inc in the Q2 2026 filings. At least 12 of the 91 current managers on file reported a position, worth $14.9bn between them. It is among the largest positions of fewer than a fifth of the current managers on file. The quarter went one way: 8 managers opened or added against 5 cutting.
- Managers holding
- 12
- at least, of 91 current
- Combined value
- $14.9bn
- as reported
- Opened
- 0
- new this quarter
- Added to
- 8
- already held
- Trimmed or sold out
- 5
- 1 sold out entirely
Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.
Managers reporting a position
Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.
| Manager | Value | Weight | Shares | Change on the quarter | Action |
|---|---|---|---|---|---|
| Fidelity (FMR LLC) Long-only · $2304bn book | $4.5bn | 0.2% | 15,023,962 | -$301m+444,796 | Added |
| Capital World Investors Long-only · $846bn book | $3.4bn | 0.4% | 11,144,846 | -$219m+342,498 | Added |
| Capital Research Global Investors Long-only · $717bn book | $2.9bn | 0.4% | 9,750,699 | -$198m+279,518 | Added |
| Invesco Ltd Long-only · $1264bn book | $1.1bn | 0.1% | 3,754,318 | -$218m-320,802 | Trimmed |
| Baillie Gifford & Co Long-only · $110bn book | $735m | 0.7% | 2,439,889 | -$91m-53,977 | Trimmed |
| Wellington Management Group LLP Long-only · $580bn book | $635m | 0.1% | 2,110,407 | -$5.2m+174,482 | Added |
| Dodge & Cox Activist · $191bn book | $589m | 0.3% | 1,955,393 | -$50m+26,140 | Added |
| Two Sigma Investments LP Quantitative · $138bn book | $565m | 0.4% | 1,875,937 | -$95m-116,640 | Trimmed |
| D. E. Shaw & Co. Quantitative · $210bn book | $332m | 0.2% | 1,104,109 | -$18m+45,047 | Added |
| Woodline Partners LP Long/short equity · $32.4bn book | $74m | 0.2% | 246,282 | -$6.6m+2,399 | Added |
| Hudson Bay Capital Management LP Multi-strategy · $36.8bn book | $45m | 0.1% | 148,720 | +$32m+108,720 | Added |
| Bridgewater Associates LP Macro · $24.4bn book | $30m | 0.1% | 99,584 | -$5.3m-7,008 | Trimmed |
Sold out of this quarter
Valued at what the position was worth in the previous filing, because by this one it is gone.
- Two Sigma Investments LP · Quantitative$7.7m held before
Ownership through time
At least 21 of the 95 managers whose filings are on file listed ALNY in Q2 2026, against 3 in Q2 2013. 1 manager fewer than in Q1 2026: 1 started a position; 2 no longer listed it among the positions read, which can mean a holding below the listed range or a filing not yet made.
Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.
- Q2 2013: 3
- Q3 2013: 6
- Q4 2013: 7
- Q1 2014: 8
- Q2 2014: 6
- Q3 2014: 7
- Q4 2014: 6
- Q1 2015: 8
- Q2 2015: 6
- Q3 2015: 5
- Q4 2015: 6
- Q1 2016: 8
- Q2 2016: 7
- Q3 2016: 8
- Q4 2016: 8
- Q1 2017: 9
- Q2 2017: 14
- Q3 2017: 15
- Q4 2017: 14
- Q1 2018: 15
- Q2 2018: 15
- Q3 2018: 14
- Q4 2018: 10
- Q1 2019: 11
- Q2 2019: 16
- Q3 2019: 11
- Q4 2019: 13
- Q1 2020: 12
- Q2 2020: 15
- Q3 2020: 13
- Q4 2020: 13
- Q1 2021: 14
- Q2 2021: 13
- Q3 2021: 14
- Q4 2021: 12
- Q1 2022: 12
- Q2 2022: 13
- Q3 2022: 17
- Q4 2022: 16
- Q1 2023: 19
- Q2 2023: 16
- Q3 2023: 17
- Q4 2023: 15
- Q1 2024: 15
- Q2 2024: 19
- Q3 2024: 18
- Q4 2024: 15
- Q1 2025: 18
- Q2 2025: 22
- Q3 2025: 33
- Q4 2025: 24
- Q1 2026: 22
- Q2 2026: 21
- Q2 2013: $370m
- Q3 2013: $1.2bn
- Q4 2013: $1.5bn
- Q1 2014: $1.6bn
- Q2 2014: $1.7bn
- Q3 2014: $2.1bn
- Q4 2014: $2.2bn
- Q1 2015: $2.9bn
- Q2 2015: $3.3bn
- Q3 2015: $2.1bn
- Q4 2015: $2.7bn
- Q1 2016: $2.0bn
- Q2 2016: $2.0bn
- Q3 2016: $2.6bn
- Q4 2016: $1.6bn
- Q1 2017: $2.2bn
- Q2 2017: $3.8bn
- Q3 2017: $5.7bn
- Q4 2017: $6.3bn
- Q1 2018: $5.7bn
- Q2 2018: $4.4bn
- Q3 2018: $3.9bn
- Q4 2018: $3.3bn
- Q1 2019: $4.6bn
- Q2 2019: $3.8bn
- Q3 2019: $4.4bn
- Q4 2019: $6.2bn
- Q1 2020: $5.7bn
- Q2 2020: $7.7bn
- Q3 2020: $7.6bn
- Q4 2020: $6.5bn
- Q1 2021: $7.2bn
- Q2 2021: $8.8bn
- Q3 2021: $9.7bn
- Q4 2021: $8.8bn
- Q1 2022: $8.9bn
- Q2 2022: $8.1bn
- Q3 2022: $10.8bn
- Q4 2022: $13.7bn
- Q1 2023: $11.5bn
- Q2 2023: $10.6bn
- Q3 2023: $9.7bn
- Q4 2023: $10.0bn
- Q1 2024: $7.3bn
- Q2 2024: $12.5bn
- Q3 2024: $15.1bn
- Q4 2024: $12.8bn
- Q1 2025: $14.9bn
- Q2 2025: $18.3bn
- Q3 2025: $26.6bn
- Q4 2025: $23.4bn
- Q1 2026: $17.9bn
- Q2 2026: $15.9bn
Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.
Started in Q2 2026
- Winton Group Ltd$2.4m
Largest increases, by shares
- Fidelity (FMR LLC)14,579,166 to 15,023,962 shares+$134m
- Capital World Investors10,802,348 to 11,144,846 shares+$103m
- Capital Research Global Investors9,471,181 to 9,750,699 shares+$84m
- Wellington Management Group LLP1,935,925 to 2,110,407 shares+$53m
- Hudson Bay Capital Management LP40,000 to 148,720 shares+$33m
Largest decreases, by shares
- Marshall Wace LLP1,099,318 to 259,799 shares-$253m
- Invesco Ltd4,075,120 to 3,754,318 shares-$97m
- T. Rowe Price Associates Inc1,432,748 to 1,149,201 shares-$85m
- Squarepoint Ops LLC426,723 to 233,999 shares-$58m
- AQR Capital Management LLC913,104 to 728,039 shares-$56m
Left it
No manager on file is shown leaving it.
| Manager | Value over time | First listed | Largest | Q2 2026 |
|---|---|---|---|---|
| Fidelity (FMR LLC) | Q2 2013 | $7.6bn | $4.5bn | |
| Capital World Investors | Q2 2013 | $7.5bn | $3.4bn | |
| Capital Research Global Investors | Q4 2022 | $3.3bn | $2.9bn | |
| Invesco Ltd | Q2 2020 | $2.0bn | $1.1bn | |
| Baillie Gifford & Co | Q2 2013 | $2.2bn | $734m | |
| Wellington Management Group LLP | Q3 2013 | $1.6bn | $635m | |
| Dodge & Cox | Q2 2016 | $1.1bn | $589m | |
| Two Sigma Investments LP | Q3 2017 | $659m | $565m | |
| T. Rowe Price Associates Inc | Q3 2013 | $1.6bn | $346m | |
| D. E. Shaw & Co. | Q1 2015 | $350m | $332m | |
| AQR Capital Management LLC | Q2 2024 | $366m | $219m | |
| MFS Investment Management | Q2 2020 | $277m | $106m | |
| Marshall Wace LLP | Q2 2019 | $364m | $78m | |
| Woodline Partners LP | Q4 2022 | $203m | $74m | |
| Squarepoint Ops LLC | Q1 2018 | $141m | $70m | |
| Arrowstreet Capital LP | Q3 2017 | $618m | last listed Q4 2025 | |
| Two Sigma Advisers LP | Q1 2016 | $450m | last listed Q4 2025 | |
| Jane Street Group LLC | Q3 2022 | $437m | last listed Q4 2025 | |
| Maverick Capital Ltd | Q2 2018 | $307m | last listed Q3 2021 | |
| Susquehanna International Group LLP | Q3 2025 | $263m | last listed Q3 2025 | |
| Millennium Management LLC | Q1 2025 | $251m | last listed Q1 2026 | |
| Farallon Capital Management LLC | Q2 2017 | $202m | last listed Q1 2024 | |
| Citadel Advisors LLC | Q1 2016 | $196m | last listed Q2 2025 | |
| Holocene Advisors LP | Q3 2019 | $195m | last listed Q3 2025 | |
| Voloridge Investment Management LLC | Q1 2014 | $163m | last listed Q1 2026 |
What ALNY is worth
Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.
Build the comp set around ALNY →How much of the picture this is
A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.
What to do with a name the funds are buying
Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.
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The holdings, every quarter, and the week between
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