Manager × security

Palo Alto Investors LP PTCT holdings history

Who else holds this security? →

PTC THERAPEUTICS INC · CUSIP 69366J200 · CIK 1306923

This is the oldest quarter open without an account, so changes against the quarter before it are withheld. Sign in to see them.
Citable facts

As of 2026-06-30, Palo Alto Investors LP reported 918.85K PTCT (shares), valued at $74.95M, or 10.36% of its reported non-derivative portfolio. Filed 2026-08-19.

Verify history & sources →
Portfolio weight and quantity history
Reported portfolio weight
10.36%
Shares
918.85K
918,846
Reported value
$74.95M
USD

Shares decreased 0.30%; reported value increased 19.37%, and weight changed +0.76 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.

Left: % · Right: Shares · Independently scaled axes

Exact data and methodology

Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.

QuarterWeightQuantitySource
Q2 202610.36%918,846SEC filing ↗Filed Aug 19, 2026Amended
Q1 20269.60%921,607SEC filing ↗Filed May 15, 2026
Q4 20259.56%903,916SEC filing ↗Filed Feb 17, 2026
Q3 20259.80%862,613SEC filing ↗Filed Nov 14, 2025
Q2 20254.22%406,469SEC filing ↗Filed Aug 14, 2025
Q1 20253.92%404,196SEC filing ↗Filed May 15, 2025
Q4 20242.70%386,413SEC filing ↗Filed Feb 14, 2025
Q3 20241.27%264,469SEC filing ↗Filed Nov 14, 2024
Q2 2024Not reportedNot reported—
Q1 2024Not reportedNot reported—
Q4 2023Not reportedNot reported—

History & evidence by quarter

QuarterWeightQuantityValueChange explainedSource
Q4 2023Not reported——This security is absent from this quarter's filing; a missing record is not treated as zero holdings.—
Q1 2024Not reported——This security is absent from this quarter's filing; a missing record is not treated as zero holdings.—
Q2 2024Not reported——This security is absent from this quarter's filing; a missing record is not treated as zero holdings.—
Q3 20241.27%264,469$9.81MA comparable prior-quarter record is unavailable; changes are not inferred.SEC filing ↗
Filed Nov 14, 2024
Q4 20242.70%386,413$17.44MShares increased 46.11%; reported value increased 77.77%, and weight changed +1.43 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 14, 2025
Q1 20253.92%404,196$20.60MShares increased 4.60%; reported value increased 18.09%, and weight changed +1.22 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 15, 2025
Q2 20254.22%406,469$19.85MShares increased 0.56%; reported value decreased 3.62%, and weight changed +0.30 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 14, 2025
Q3 20259.80%862,613$52.94MShares increased 112.22%; reported value increased 166.67%, and weight changed +5.58 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 14, 2025
Q4 20259.56%903,916$68.66MShares increased 4.79%; reported value increased 29.70%, and weight changed -0.24 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 17, 2026
Q1 20269.60%921,607$62.79MShares increased 1.96%; reported value decreased 8.55%, and weight changed +0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 15, 2026
Q2 202610.36%918,846$74.95MShares decreased 0.30%; reported value increased 19.37%, and weight changed +0.76 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 19, 2026
Palo Alto Investors LP · PTC THERAPEUTICS INC

Take these holdings further.

This page includes 11 of 11 reported holdings. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

  • Download CSV
  • Earlier quarters
  • Advanced screening & filtering
  • API & AI access
Already have an account?

+ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP.

MCP  https://api.akkrudata.ai/mcp

get_institutional_portfolio
{"cik":"1306923","quarter":"2026Q2","cusip":"69366J200"}

get_institutional_manager_history
{"cik":"1306923","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint
https://api.akkrudata.ai/mcp
API / MCP documentation
/documents
llms.txt
/llms.txt
Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

13F reports quarter-end long positions in securities traded on US exchanges, filed by managers holding at least $100 million of such securities; it is not the manager's full portfolio, not assets under management, and value changes are not returns. Weights use the reported total value as denominator. Option rows show notional value, not premium or net exposure. Amendments are merged into the quarter when Akkru could match them.