Phathom Pharmaceuticals Ownership | Who Owns Phathom Pharmaceuticals?


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Phathom Pharmaceuticals Ownership Summary


Phathom Pharmaceuticals is owned by 93.79% institutional investors, 4.56% insiders, and 1.65% retail investors. Frazier life sciences management is the largest institutional shareholder, holding 15.19% of PHAT shares. Invesco OFI Global Equity is the top mutual fund, with 2.94% of its assets in Phathom Pharmaceuticals shares.

PHAT Ownership Benchmark


TypeName% Inst% Insiders% Retail
StockPhathom Pharmaceuticals93.79%4.56%1.65%
SectorHealthcare Stocks 35.56%12.08%52.36%
IndustryBiotech Stocks 35.43%12.01%52.56%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Frazier life sciences management12.47M15.19%$135.26M
Medicxi ventures management (jersey)7.46M9.10%$80.99M
Blackrock funding, inc. /de4.53M5.51%$49.10M
Blackrock2.93M5.01%$30.14M
Invesco4.03M4.91%$43.72M
Vanguard group3.18M4.33%$52.71M
Carlyle group3.50M4.26%$37.94M
Millennium management3.38M4.11%$36.63M
Vanguard capital management2.66M3.24%$28.83M
Gw&k investment management2.17M2.64%$23.51M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Medicxi ventures management (jersey)7.46M45.65%$80.99M
Catalys pacific1.49M7.06%$16.21M
Propel bio management1.05M5.96%$11.40M
Penn mutual asset management62.80K3.50%$681.40K
Frazier life sciences management12.47M2.95%$135.26M
Ghost tree capital600.00K1.94%$6.18M
Nea management company1.96M1.34%$21.27M
683 capital management1.85M0.99%$20.07M
Stonepine capital management85.01K0.43%$922.36K
Carlyle group3.50M0.38%$37.94M

Top Buyers

HolderShares% AssetsChange
Goldman sachs group1.78M0.00%1.15M
Point72 asset management1.02M0.01%1.02M
Franklin resources1.97M0.00%976.32K
Gw&k investment management2.17M0.18%745.73K
Hsbc709.70K0.00%709.70K

Top Sellers

HolderShares% AssetsChange
Jennison associates---7.04M
Checkpoint capital---2.27M
Portolan capital management---1.70M
Orbimed advisors---1.45M
Tang capital management---1.20M

New Positions

HolderShares% AssetsChangeValue
Point72 asset management1.02M0.01%1.02M$11.09M
Hsbc709.70K0.00%709.70K$7.70M
Sixth street partners management company419.09K0.00%419.09K$4.55M
Opaleye management185.59K0.18%185.59K$2.01M
Schroder investment management group101.75K0.00%101.75K$1.11M

Sold Out

HolderChange
Hughes financial services-1.00
Ifp advisors-1.00
Nelson, van denburg & campbell wealth management group-7.00
Root financial partners-11.00
Eversource wealth advisors-12.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 2026174-1.69%68,392,19810.38%931.32%11214.29%38-25.49%
Dec 31, 2025101-26.28%40,864,285-34.45%550.75%56-22.22%307.14%
Sep 30, 202574-37.82%29,531,937-48.16%400.66%37-40.32%18-45.45%
Jun 30, 2025124-11.43%57,375,847-9.22%791.03%63-12.50%378.82%
Mar 31, 2025142-4.05%64,025,009-3.98%880.84%73-22.34%3534.62%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
Invesco OFI Global Equity2.34M2.94%-
Invesco Global A2.34M2.90%-
Jennison Health Sciences Equity1.78M2.56%-
Vanguard Total Stock Mkt Idx Inv2.01M2.52%-
Vanguard Morn Total Stk Mkt Idx Investor2.01M2.48%-
Vanguard US Total Market Shares ETF1.65M2.36%280.90K
Jennison SMid Cap Core Equity1.58M2.27%-
Strategic Advisers U.S. Total Stock{mg}1.48M2.16%-273.72K
Strategic Advisers Small-Mid Cap1.24M1.82%278.88K
PGIM Jennison Small Company A1.21M1.73%-373.30K

Recent Insider Transactions


DateNameRoleActivityValue
Nov 03, 2025Breedlove Robert Charles Principal Accounting OfficerSell$7.08K
Sep 05, 2025Breedlove Robert Charles Principal Accounting OfficerSell$5.57K
Jul 16, 2025Breedlove Robert Charles Principal Accounting OfficerSell$14.15K
May 21, 2025Topper James N-Buy$14.61K
May 14, 2025Topper James N-Buy$20.92K

Insider Transactions Trends


DateBuySell
2026 Q3--
2026 Q2--
2026 Q1--
2025 Q4-1
2025 Q3-2

PHAT Ownership FAQ


Who Owns Phathom Pharmaceuticals?

Phathom Pharmaceuticals shareholders are primarily institutional investors at 93.79%, followed by 4.56% insiders and 1.65% retail investors. The average institutional ownership in Phathom Pharmaceuticals's industry, Biotech Stocks , is 35.43%, which Phathom Pharmaceuticals exceeds.

Who owns the most shares of Phathom Pharmaceuticals?

Phathom Pharmaceuticals’s largest shareholders are Frazier life sciences management (12.47M shares, 15.19%), Medicxi ventures management (jersey) (7.46M shares, 9.10%), and Blackrock funding, inc. /de (4.53M shares, 5.51%). Together, they hold 29.81% of Phathom Pharmaceuticals’s total shares outstanding.

Does Blackrock own Phathom Pharmaceuticals?

Yes, BlackRock owns 5.01% of Phathom Pharmaceuticals, totaling 2.93M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 30.14M$. In the last quarter, BlackRock increased its holdings by 180.99K shares, a 6.59% change.

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

Medicxi ventures management (jersey) is Phathom Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 45.65% of its assets in 7.46M Phathom Pharmaceuticals shares, valued at 80.99M$.

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

Invesco OFI Global Equity is the top mutual fund holder of Phathom Pharmaceuticals shares, with 2.94% of its total shares outstanding invested in 2.34M Phathom Pharmaceuticals shares.

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