Key points

  • Rogelio Zambrano Lozano, a director at CEMEX SAB DE CV, bought $6.93 million of stock in a single reported transaction. The purchase covered 400,800 shares and was dated September 25th, 2026.
  • Every share in the filing was priced at $17.2812. The disclosed price range opens and closes at the same number, which points to one execution price rather than a series of fills at different levels.
  • CX last traded at $9.71. That is below the price the director paid, so the position as filed is under water on paper at the last price.
  • The activity sits in one filing, not a cluster. Only a single Form 4 underlies the total, and only one insider name appears in it.

CEMEX SAB DE CV, the hydraulic cement producer, drew a $6.93 million open market purchase from one of its own directors. Rogelio Zambrano Lozano reported buying 400,800 shares on September 25th, 2026, all at $17.2812.

The company carries a market capitalization of $14,011,068,416. Against that base, the purchase is small in relative terms, but it is a large dollar commitment for one individual and it is the only insider buy in the record we reviewed for this name.

What the filing shows

The mechanics are simple. One filing, one buyer, one price. The low and the high of the reported range are both $17.2812, which is what a single block execution usually looks like on a Form 4 rather than a day of scattered fills.

Zambrano Lozano is listed in the role of director. That matters for how the disclosure is read: directors sit on the board, they see the board calendar, and their open market purchases are reported on the same schedule as those of officers. The filing does not state a reason for the trade, and we do not assign one.

What the insiders did

The activity here is concentrated rather than broad. A total of 1 filing produced the entire $6.93 million figure. There is no second name, no staggered set of dates, and no accumulating pattern across weeks to point to.

That shape has two readings and both are worth holding at once. A single large purchase by a board member is a clear, dated, legally reported commitment of personal capital. It is also, by definition, one data point, and one data point is a thinner base than a group of insiders buying independently over a stretch of time.

Size is the other variable. At 400,800 shares, this is not a token round lot bought to be seen. It is a block, and it was reported as such.

Where the stock sits

CX last traded at $9.71. The reported purchase price was $17.2812. The gap between those two numbers is the single most important context for this filing, because it means the market has repriced the shares well away from where the director transacted.

Readers should be careful about what that gap does and does not prove. It does not show that the purchase was mistimed in any final sense, and it does not show that the director has sold or intends to sell. It shows only that the last available price is lower than the filed transaction price, which is a fact about the tape, not about the buyer's view.

What that leaves

Cemex operates in hydraulic cement, a business tied to construction volumes, infrastructure spending, energy costs and freight. Those drivers move on their own schedule and they do not care about a Form 4. Nothing in this disclosure speaks to demand, pricing or the balance sheet.

The disciplined way to file this away is as a dated, verifiable fact. On September 25th, 2026, a director of a company with a market capitalization of $14,011,068,416 put $6.93 million into 400,800 shares at $17.2812. The shares last changed hands at $9.71. Whether more insiders follow, and at what levels, is the thing to watch, and it will show up the same way this did, in the filings.

One further note on interpretation: insider purchases are disclosures, not forecasts. They tell you what someone did with their own money on a particular day. They do not tell you what happens next, and any Form 4, including this one, can be followed by nothing at all.

Sources: SEC Form 4 filings retrieved via EDGAR and reviewed by InsiderBuying.com, covering the transaction dated September 25th, 2026.

Informational only, not investment advice.