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Amylyx Pharmaceuticals Ownership | Who Owns Amylyx Pharmaceuticals?

OverviewForecastRevenueFinancialsChartTranscripts

Amylyx Pharmaceuticals Ownership Summary

Amylyx Pharmaceuticals is owned by 91.60% institutional investors, 9.50% insiders. Adage capital partners gp is the largest institutional shareholder, holding 9.87% of AMLX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.52% of its assets in Amylyx Pharmaceuticals shares.

AMLX Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockAmylyx Pharmaceuticals91.60%9.50%-1.10%
SectorHealthcare Stocks 488.17%11.08%-399.26%
IndustryBiotech Stocks 307.00%11.11%-218.12%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Adage capital partners gp8.80M9.87%$56.41M
Perceptive advisors7.90M8.87%$50.65M
Tcg crossover management5.94M6.67%$38.10M
Blackrock funding, inc. /de5.51M6.18%$35.32M
Point72 asset management4.54M5.09%$29.08M
Vanguard group2.69M3.95%$10.18M
Blackrock2.67M3.93%$5.07M
Saturn v capital management3.26M3.66%$20.90M
Nantahala capital management2.93M3.29%$18.81M
Goldman sachs group1.86M2.73%$7.03M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Allostery investments lp120.12K9.81%$769.96K
Saturn v capital management3.26M8.47%$20.90M
Great point partners2.00M8.34%$12.82M
Tcg crossover management5.94M4.35%$38.10M
Almitas capital2.12M3.43%$13.61M
Perceptive advisors7.90M1.88%$50.65M
Aldebaran capital217.83K1.38%$1.40M
Adar1 capital management1.21M1.18%$7.72M
683 capital management2.16M0.91%$13.85M
Nantahala capital management2.93M0.74%$18.81M

Top Buyers

HolderShares% AssetsChange
Point72 asset management4.54M0.06%3.62M
Blackrock funding, inc. /de5.51M0.00%3.12M
Adage capital partners gp8.80M0.10%3.10M
Driehaus capital management1.26M0.06%1.26M
Saturn v capital management3.26M8.47%834.13K

Top Sellers

HolderShares% AssetsChange
Franklin resources---1.86M
Blackrock2.67M0.00%-1.80M
Abrdn738.66K0.01%-1.69M
Boxer capital---1.50M
Farallon capital management---1.15M

New Positions

HolderShares% AssetsChangeValue
Driehaus capital management1.26M0.06%1.26M$8.11M
Parkman healthcare partners650.00K0.48%650.00K$4.17M
J. goldman & co lp258.60K0.04%258.60K$1.66M
Wellington management group llp209.71K0.00%209.71K$792.70K
Dimensional fund advisors lp54.11K-54.11K$204.55K

Sold Out

HolderChange
Nelson, van denburg & campbell wealth management group-10.00
Kelly financial services-33.00
Gamma investing-35.00
Fernwood investment management-200.00
Redwood wealth management group-200.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 2025131-2.96%81,652,43717.21%911.39%70-12.50%3512.90%
Mar 31, 20251373.79%73,635,54347.89%851.61%8224.24%30-26.83%
Dec 31, 202413012.07%49,788,21014.69%731.80%6518.18%4014.29%
Sep 30, 2024116-8.66%43,410,314-0.50%631.54%56-3.45%35-25.53%
Jun 30, 2024127-28.25%43,627,452-12.05%641.19%58-33.33%47-2.08%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv2.25M2.52%-49.88K
iShares Russell 2000 ETF1.64M1.84%-31.08K
Fidelity Select Biotechnology1.34M1.50%126.30K
Vanguard Small Cap Index646.02K0.95%1.52K
Vanguard Institutional Extnd Mkt Idx Tr779.02K0.87%-356.52K
Jupiter Merian Glb Eq AbsRet I USD Acc480.21K0.71%185.87K
iShares Russell 2000 Growth ETF471.66K0.53%-
Vanguard Small Cap Growth Index Inv357.96K0.53%-1.58K
Invesco Dorsey Wright SmallCap Momt ETF449.30K0.50%-
Schwab Small-Cap Equity331.23K0.49%240.56K

Recent Insider Transactions

DateNameRoleActivityValue
Aug 13, 2025Mazzariello Gina Chief Legal OfficerSell$125.05K
Aug 12, 2025Mazzariello Gina Chief Legal OfficerSell$121.10K
Mar 31, 2025FRATES JAMES M Chief Financial OfficerSell$37.81K
Mar 31, 2025Bedrosian Camille L Chief Medical OfficerSell$43.08K
Mar 31, 2025Mazzariello Gina Chief Legal OfficerSell$31.95K

Insider Transactions Trends

DateBuySell
2025 Q3-2
2025 Q2--
2025 Q1114
2024 Q4-1
2024 Q334

AMLX Ownership FAQ

Who Owns Amylyx Pharmaceuticals?

Amylyx Pharmaceuticals shareholders are primarily institutional investors at 91.60%, followed by 9.50% insiders and -1.10% retail investors. The average institutional ownership in Amylyx Pharmaceuticals's industry, Biotech Stocks , is 307.00%, which Amylyx Pharmaceuticals falls below.

Who owns the most shares of Amylyx Pharmaceuticals?

Amylyx Pharmaceuticals’s largest shareholders are Adage capital partners gp (8.8M shares, 9.87%), Perceptive advisors (7.9M shares, 8.87%), and Tcg crossover management (5.94M shares, 6.67%). Together, they hold 25.41% of Amylyx Pharmaceuticals’s total shares outstanding.

Does Blackrock own Amylyx Pharmaceuticals?

Yes, BlackRock owns 3.93% of Amylyx Pharmaceuticals, totaling 2.67M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 5.07M$. In the last quarter, BlackRock decreased its holdings by -1.805M shares, a -40.34% change.

Who is Amylyx Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Allostery investments lp is Amylyx Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 9.81% of its assets in 120.12K Amylyx Pharmaceuticals shares, valued at 769.96K$.

Who is the top mutual fund holder of Amylyx Pharmaceuticals shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Amylyx Pharmaceuticals shares, with 2.52% of its total shares outstanding invested in 2.25M Amylyx Pharmaceuticals shares.

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