Grupo Simec, S.A.B. de C.V.: shareholders and insiders

SIMAMEXBasic materials · Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)

Price

$24.36

November 9, 2026Market cap $3.7B

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  • The full history: 10 fiscal years, from 2016
  • The estimated fair value, with its range and its certainty
  • The full analysis, 18 a month
  • More questions to the chat on its filings
  • Excel with every year
  • An email when it reports, changes its dividend or an officer buys

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Insiders and their shares

Purchases and sales by officers and directors, from their own Form 4 filings.

Sorry, we do not have enough data

for purchases and sales by Grupo Simec, S.A.B. de C.V.'s insiders

Why?

Grupo Simec, S.A.B. de C.V.'s filings

Major holders (over 5%)

Whoever comes to own more than 5% of a class of shares reports it to the SEC on Schedule 13D or 13G. Here is each holder's latest filing.

No filing over 5%

Since Dec 18, 2024 nobody has filed a Schedule 13D or 13G for Grupo Simec, S.A.B. de C.V. shares.

From the Schedule 13D and 13G filed with the SEC since Dec 18, 2024, when they became structured data. A holder who has filed nothing since then is not shown here. A 13D is updated within two business days of any material change, a 13G up to 45 days after the quarter of the change, so the shares are those of the filing. The large managers also appear in the 13Fs.

Well-known managers

Which of the about 30 investment managers we track held the shares at the quarter end, and what they changed from the quarter before.

Sep 30, 2026 quarter end
  • Renaissance Technologies
    In the quarter-1.2%

From the 13Fs managers file with the SEC up to 45 days after each quarter end. They show only long positions on that day, not short sales or what has changed since. No recent 13F: Pershing Square (Ackman), Scion (Burry).

Short sales in daily trading

How much of the shares that changed hands were short sales, in the off-exchange trades brokers report each day.

40.5% the last 12 sessions-2.3 pts vs the 13 before

In the last 12 sessions, 40.5% of the shares in the reported trades were short sales, against 42.8% in the 13 before.

Last 12 sessionsOct 28, 2026 – Nov 13, 2026
40.5%
The 13 beforeOct 7, 2026 – Oct 23, 2026
42.8%
Change
-2.3 pts
Short sales a dayon average, of 135 shares
54
More than atof 3,649 US-listed companies, same days
20%
Median of alleight in ten from 34.6% to 63.4%
50.1%
  • Oct 7, 2026: Short sales 46.3%
  • Oct 8, 2026: Short sales 16.7%
  • Oct 9, 2026: Short sales 47.7%
  • Oct 12, 2026: Short sales 20.2%
  • Oct 13, 2026: Short sales 37.9%
  • Oct 14, 2026: Short sales 38.1%
  • Oct 15, 2026: Short sales 61.1%
  • Oct 16, 2026: Short sales 57.7%
  • Oct 19, 2026: Short sales 43.8%
  • Oct 20, 2026: Short sales 43.9%
  • Oct 21, 2026: Short sales 26.4%
  • Oct 22, 2026: Short sales 30.7%
  • Oct 23, 2026: Short sales 39%
  • Oct 28, 2026: Short sales 55.6%
  • Oct 29, 2026: Short sales 25.5%
  • Oct 30, 2026: Short sales 9.3%
  • Nov 2, 2026: Short sales 54.8%
  • Nov 3, 2026: Short sales 31.6%
  • Nov 4, 2026: Short sales 9.6%
  • Nov 5, 2026: Short sales 41.7%
  • Nov 6, 2026: Short sales 44.6%
  • Nov 10, 2026: Short sales 54%
  • Nov 11, 2026: Short sales 52.4%
  • Nov 12, 2026: Short sales 49.1%
  • Nov 13, 2026: Short sales 53.1%

This is not the number of shares sold short today: it measures short sales within each day's trading, and only trades made off the exchanges. Much of it is market makers, who sell shares they do not have to fill buyers' orders and cover soon after, so for a heavily traded stock the share is often around half. Shares held short, which are published twice a month, are not included here.

Institutional investors by quarter

Every manager that reports positions to the SEC (Form 13F), quarter by quarter: how many hold the stock, how many shares and dollars between them, and who entered, left, added or trimmed during the quarter.

12 Managers, Q2 2026$7.4M Value of their positions
  • Q3 2025: Managers 13
  • Q4 2025: Managers 13
  • Q1 2026: Managers 12
  • Q2 2026: Managers 12

Institutional investors by quarter

The fund managers holding SIM, quarter by quarter, from Q1 2013 to Q2 2025, 50 more quarters

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Q2 2026: 12 managers held 245.2K shares, worth $7.4M. During the quarter 1 opened a position, 1 closed one, 0 added and 3 trimmed.

The largest holders, Q2 2026

  • Renaissance Technologies
    In the quarter-0.3%
  • Susquehanna International Group
    In the quarter-0.5%
  • Dimensional Fund Advisors
    In the quarter
  • Acadian Asset Management
    In the quarter
  • BlackRock
    In the quarter
  • JPMorgan Chase
    In the quarter
  • Morgan Stanley
    In the quarter
  • UBS Group
    In the quarter-6.8%
  • Osaic Holdings
    In the quarter
  • Integrated Wealth Concepts
    In the quarter

From the SEC's Form 13F data sets, Q3 2025 to Q2 2026: the long positions of every manager with more than $100 million under management, as filed up to 45 days after each quarter end. Short positions and options are not in them. Shares as reported each quarter, not adjusted for splits. The stock is matched by its CUSIP, through the SEC's fails-to-deliver files.

Pay against performance, the say-on-pay vote, buybacks by quarter and trading plans are read for S&P 500 companies only.

The full analysis

What do Grupo Simec, S.A.B. de C.V.'s filings show?

Who buys and sells is one part of Grupo Simec, S.A.B. de C.V.'s picture. The full Ploutos AI analysis reads everything the company has filed and shows what stands behind it, with a source for every figure.

  • A fair value range built from the filings
  • Earnings quality, debt and red flags
  • Insider and institutional moves
  • The case for and the case against

Questions about SIM's shareholders

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Have SIM's insiders bought or sold?

From – to – Grupo Simec, S.A.B. de C.V.'s insiders reported no purchase or sale of shares on the market.

Which well-known managers hold SIM?

1 of the managers we track held the shares on Sep 30, 2026. The largest position was Renaissance Technologies's, worth $6.0M.

Is every insider transaction a purchase or a sale?

No. Many are part of their pay: share awards, option exercises and shares the company keeps for the tax. Only code P is a purchase with their own money, and code S a sale on the market.

Related pages

The other pages on US stocks, free to read. On the company pages, the last three fiscal years are open to everyone, five with a free account, and every year with Ploutos Investor.

US stocksThe market today, the sectors, the largest companies and the week's results.The market's sectorsThe 11 sectors side by side: returns, share of the market, median P/E and dividend.Compare stocksTwo companies side by side: price over up to ten years, with and without dividends, and every figure.US dividend stocksEach dividend's yield next to whether the company's cash covers it and whether it was ever cut.

The figures come from the company's SEC filings and the share price, and describe what it has reported. They are not a score or a fair value.