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Palo Alto Investors LP

Palo Alto, CASEC-registered investment adviserCRD 109171

Filed as PALO ALTO INVESTORS LP

Palo Alto Investors LP is an SEC-registered investment advisory firm in Palo Alto, CA, registered since 2000, reporting $500 million to $1 billion in regulatory assets under management in its Form ADV filing dated March 27, 2026.

25 years
registered since 2000
$696,000,000
assets under management
2 arrangements
Percentage of assets, Performance-based
None
disclosure items (Item 11)

Quick answers

From the filing

How is Palo Alto Investors LP compensated?

On its Form ADV (Item 5.E, October 2026), Palo Alto Investors LP reports these compensation arrangements: a percentage of assets under its management; performance-based fees.

Where is Palo Alto Investors LP located?

Palo Alto Investors LP's principal office is in Palo Alto, CA, according to its Form ADV.

Is Palo Alto Investors LP registered with the SEC or a state?

Palo Alto Investors LP is an SEC-registered investment advisory firm, registered since 2000. Status as filed: Approved. CRD 109171.

How much does Palo Alto Investors LP manage?

Palo Alto Investors LP reports $696,000,000 in regulatory assets under management in its Form ADV filing dated March 27, 2026 (100% discretionary).

How have Palo Alto Investors LP's assets and staff changed since 2021?

In the Form ADV data for Palo Alto Investors LP: Regulatory assets under management: $2,088,000,000 in the October 2021 data and $696,000,000 in the October 2026 data, down 67%. Total employees: 12 in October 2021 and 10 in October 2026. Assets under management move with markets as well as with clients coming and going.

What types of clients does Palo Alto Investors LP serve?

By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (13).

Does Palo Alto Investors LP report any disciplinary disclosures?

Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/109171

What changed in Palo Alto Investors LP's recent Form ADV filings?

In the April 2026 filing data: Employees performing advisory functions went from 5 to 4.

From the Form ADV filing

Every figure below is as the firm filed it with regulators, as of October 2026.

How the firm is compensated

Item 5.E
  • A percentage of assets under your management
  • Performance-based fees

Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ

Fees and minimums

Form ADV Part 2A

See the firm's brochure (dated March 27, 2026) for its fees and any account minimum, on the SEC's IAPD site.

Regulatory assets under management

Item 5.F
$696,000,000

$696,000,000 as of October 2026, filing dated March 27, 2026.

Discretionary: $696,000,000.Non-discretionary: $0.

A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means

Who the firm serves

Item 5.D
Pooled investment vehicles (other than investment companies and business development companies)
Clients 13 Assets $696,000,000 (100%)

A firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.

Advisory services

Item 5.G
  • Portfolio management for pooled investment vehicles (other than investment companies)

Registration and firm details

Items 1, 2, 5
Registration
SEC-registered investment adviser. Status as filed: Approved.
Registered since
2000 (25 years)
Employees
Total: 10. Performing investment advisory functions: 4.
Wrap fee program participation
No.
States registered or notice-filed
4 states or jurisdictions
CATXVAWA

SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration

Disclosures

Item 11

None Reports no disclosure items on Form ADV Item 11. View on IAPD.

Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures

Assets and staff over time

Items 5.A, 5.F
$2.09B 2021 $1.58B 2022 $1.28B 2023 $1.06B 2024 $667M 2025 $696M 2026
Data periodAssets under managementEmployeesFiling dated
October 2026$696,000,00010March 27, 2026
October 2025$667,000,00012March 31, 2025
October 2024$1,057,000,00013March 28, 2024
October 2023$1,277,000,00012June 2, 2023
October 2022$1,584,000,00011May 11, 2022
October 2021$2,088,000,00012April 28, 2021

Regulatory assets under management: $2,088,000,000 in the October 2021 data and $696,000,000 in the October 2026 data, down 67%.

Total employees: 12 in October 2021 and 10 in October 2026.

As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.

Changes in the filing

Last 12 months
  1. April 2026
    • Employees performing advisory functions went from 5 to 4.

Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.

Websites listed on Form ADV

Item 1.I
pa-investors.com

Source: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."

Cite this page

AdvisorCensus. Palo Alto Investors LP (CRD 109171): Form ADV filing data as of October 2026.
https://advisorcensus.com/firm/palo-alto-investors-lp-palo-alto-ca-109171