Baker Brothers Investments

Hedge Fund SEC-registered adviser

Legal name: Baker Bros. Advisors LP

New York, NY

AUM

$28.1B
Regulatory AUM

Private funds

2
Hedge Fund 2

Private fund assets

$28.1B
Gross asset value

Employees

60

Last Form D raise

Oct 2025
Most recent fund filing

From SEC Form ADV filing (filed Mar 27, 2026). View on SEC

People(3)

Owners and executive officers named on the firm's SEC Form ADV.

F
Felix Baker
Managing Member, Baker Bros. Advisors (GP)
Source: SEC Form ADV
J
Julian Baker
Managing Member, Baker Bros. Advisors (GP)
Source: SEC Form ADV
S
Scott Lessing
President, Chief Compliance Officer
Source: SEC Form ADV

Funds(2)

Private funds reported on Form ADV, with amounts raised from the funds' SEC Form D filings.

FundTypeGross assetsRaised (Form D)InvestorsLast Form DRecency
Baker Brothers Life Sciences, L.P.Hedge Fund$25.8B——Oct 2025Cool
667, L.P.Hedge Fund$2.3B———

Board seats

Companies whose SEC Form D filings name one of this firm's people as a director, matched by name and office ZIP code.

No board seats matched from SEC filings yet.

Regulatory identifiers

CRD number
158149
SEC file number
801-73446
CIK
1263508

Sources