Three brands own the toilet shelf

Most of what gets said about retail marketplaces is about the long tail: thousands of third party sellers crowding onto a shelf and competing on price. The toilet aisle at Lowe's is the opposite story. We captured the full toilets shelf, 70 deduplicated listings, and found a shelf with no marketplace presence at all and a roster of only nine brands. This is a fortress fixture: a high price, code and water regulated product where the entire shelf is carried vendor lines, and the front of it belongs to a tight club.

A narrow roster, and it gets narrower up front

Nine brands share the shelf, but the concentration is lopsided. American Standard and KOHLER alone hold 58.6 percent of the listings. Add Project Source, Lowe's own private label, and three brands control 71.4 percent. The remaining six split the back half in low single digits.

Concentration where it counts

The full shelf scores moderately concentrated on the standard HHI measure (2,078). But that understates the buyer's view. Limit the count to page 1, the first 24 slots a shopper actually sees, and the HHI jumps to 3,056, into the highly concentrated band. Concentration intensifies as you move toward the slots that matter. Page 1 is a five brand club, and four brands on the shelf hold zero page 1 slots despite carrying 11 listings between them. Being on the shelf is not the same as being seen.

The price ladder

The brands that are present sort into a clean ladder. Project Source sets a deliberate value floor at a $144 average, roughly half the priced shelf average. American Standard anchors the accessible mainstream at $209. KOHLER and DeerValley occupy the premium mainstream band around $330 to $353. And the top, $475 and up, is essentially a TOTO monopoly, with its single most expensive listing ($1,109) setting the ceiling.

The whitespace is visible on the ladder. There is a thin field between American Standard's $209 mainstream and the $330 to $353 premium mainstream band, and the $475 and up tier has only one real occupant. The shelf median sits at $278, with priced listings running from $94 to $1,109.

One brand bought the whole front row

The front of the shelf carries a standardized four impression ad load at fixed ranks 3, 6, 9, and 12. On the toilet shelf, all four of those paid slots are KOHLER, every one of them, at an average click price of $5.27. That is more than double the shelf wide sponsored average of $2.17 and near the top of the observed range. KOHLER is not only co anchoring this shelf organically (it also holds organic rank 1, with its lowest priced listing at $199 and a heavy review base). It is paying a premium to occupy every paid impression on the page.