Manager × security

SIMPLEX TRADING, LLC C holdings history

Who else holds this security? →

CITIGROUP INC · CUSIP 172967424 · CIK 1488542

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.
This is the oldest quarter open without an account, so changes against the quarter before it are withheld. Log in to see them.
Citable facts

As of Sep 30, 2026, SIMPLEX TRADING, LLC reported 157.55K C (shares), valued at $20.40M, or 0.65% of its reported non-derivative portfolio. Filed Nov 4, 2026.

Verify history & sources →
Portfolio weight and quantity history
Reported portfolio weight
0.65%
Shares
157.55K
157,546
Reported value
$20.40M
USD

Shares increased 464.09%; reported value increased 421.86%, and weight changed +0.55 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
Q3 20260.65%157,546SEC filing ↗Filed Nov 4, 2026
Q2 20260.10%27,929SEC filing ↗Filed Aug 12, 2026
Q1 20260.08%22,325SEC filing ↗Filed May 14, 2026
Q4 2025Not reportedNot reported—
Q3 20250.03%12,430SEC filing ↗Filed Nov 12, 2025
Q2 20250.28%123,006SEC filing ↗Filed Aug 5, 2025
Q1 20251.31%519,037SEC filing ↗Filed May 12, 2025
Q4 20241.36%687,484SEC filing ↗Filed Feb 11, 2025
Q3 20240.61%288,926SEC filing ↗Filed Nov 8, 2024
Q2 20242.47%1,213,247SEC filing ↗Filed Jul 25, 2024
Q1 2024Not reportedNot reported—
Q4 20231.72%1,075,290SEC filing ↗Filed Feb 2, 2024

History & evidence by quarter

QuarterWeightQuantityValueChange explainedSource
Q4 20231.72%1,075,290$55.31MThe prior quarter is outside the free window. Log in for the comparison.SEC filing ↗
Filed Feb 2, 2024
Q1 2024Not reported——This security is absent from this quarter's filing; a missing record is not treated as zero holdings.—
Q2 20242.47%1,213,247$76.99MA comparable prior-quarter record is unavailable; changes are not inferred.SEC filing ↗
Filed Jul 25, 2024
Q3 20240.61%288,926$18.09MShares decreased 76.19%; reported value decreased 76.51%, and weight changed -1.86 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 8, 2024
Q4 20241.36%687,484$48.39MShares increased 137.94%; reported value increased 167.56%, and weight changed +0.75 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 11, 2025
Q1 20251.31%519,037$36.85MShares decreased 24.50%; reported value decreased 23.86%, and weight changed -0.05 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 12, 2025
Q2 20250.28%123,006$10.47MShares decreased 76.30%; reported value decreased 71.58%, and weight changed -1.03 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 5, 2025
Q3 20250.03%12,430$1.26MShares decreased 89.89%; reported value decreased 87.96%, and weight changed -0.25 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 12, 2025
Q4 2025Not reported——This security is absent from this quarter's filing; a missing record is not treated as zero holdings.—
Q1 20260.08%22,325$2.53MA comparable prior-quarter record is unavailable; changes are not inferred.SEC filing ↗
Filed May 14, 2026
Q2 20260.10%27,929$3.91MShares increased 25.10%; reported value increased 54.39%, and weight changed +0.02 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 12, 2026
Q3 20260.65%157,546$20.40MShares increased 464.09%; reported value increased 421.86%, and weight changed +0.55 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 4, 2026
SIMPLEX TRADING, LLC · CITIGROUP INC

Take these holdings further.

This page includes 12 of 12 reported holdings. Log 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 / CLI.

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

akkru_institutional_holdings
{"action":"portfolio","cik":"1488542","quarter":"2026Q3","cusip":"172967424"}

akkru_institutional_holdings
{"action":"history","cik":"1488542","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 / CLI 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.