AI Visibility Index: Plastic Extrusion & Thermoforming in Missouri

When a buyer asks an AI assistant for a plastic extrusion & thermoforming supplier in Missouri, these are the companies that get named. This is what we found when the cell was last measured.

98 companies tracked
Last measured September 30, 2026
Next measurement October 30, 2026

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The headline numbers

Never named by AI

87 of 98

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

11 named at least once
87 never named

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Cell average: 0.6of 15
Across all 98 tracked companies.
Top ten average: 7.2of 15
The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in Missouri

These are the companies AI assistants named most often when Missouri buyers went looking for a supplier in this category.

Top 10 most AI-visible Plastic Extrusion & Thermoforming companies in Missouri, measured September 30, 2026
Rank	Company	Location	AI visibility
1	Seiler Plastics Corporation 30 employeesSt. Louis, Missouri 3 name variants Seiler Plasticsmost common12 Seiler Plastics Corporation1 Seiler Plastics Corp.1	St. Louis, Missouri	14 of 15 answers
2	C-K Plastics, Inc. 35 employeesSt. Louis, Missouri	St. Louis, Missouri	13 of 15 answers
3	Polyfab Plastics & Supply 30 employeesSpringfield, Missouri 2 name variants Polyfab Plasticsmost common6 Polyfab Plastics & Supply Co.1	Springfield, Missouri	7 of 15 answers
4	VisiPak Arnold, Missouri	Arnold, Missouri	7 of 15 answers
5	MarCon Solutions Missouri	Missouri	7 of 15 answers
6	Crown Plastics 70 employeesFestus, Missouri 3 name variants Crown Plastics / PlasticGlobes.commost common4 Crown Plastics / PlasticGlobes1 Crown Plastics1	Festus, Missouri	6 of 15 answers
7	EXT Plastics Inc. Missouri 2 name variants EXT Plastics Inc.most common4 EXT Plastics2	Missouri	6 of 15 answers
8	Bantry Plastics Ltd 5 employeesO'Fallon, Missouri	O'Fallon, Missouri	5 of 15 answers
9	Lexaform Thermoformed Plastics Missouri	Missouri	5 of 15 answers
10	ACI Plastics 30 employeesSt. Louis, Missouri	St. Louis, Missouri	2 of 15 answers

11 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not Missouri. They belong to that state's ranking, not this one.

Company	State	Mentions
Allied Plastics	Wisconsin	1 of 15
Spencer Industries	New Jersey	1 of 15
Stephen Gould	New York	1 of 15
Vidon Plastics	Michigan	1 of 15

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The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

1“Best plastic extrusion and thermoforming companies in Missouri”
2“Who supplies custom extruded and thermoformed plastic profiles in Missouri”
3“I need a Missouri plastic extrusion and thermoforming partner for a new consumer product housing program, who should I talk to”
4“Top plastic extrusion and thermoforming suppliers in Missouri for OEM product development buyers”
5“Which Missouri plastic extrusion and thermoforming companies can handle tight-tolerance co-extruded sheet and deep-draw forming”
6“List 20 plastic extrusion and thermoforming companies in Missouri with their specialties.”the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

thomasnet.comDirectory
5 companies
crownplastic.com
3 companies
seilerpc.com
3 companies
bantryplastics.com
1 company
ckplastics.com
1 company
1xplastics.com
1 company
alliedplastics.com
1 company
brentwoodplastics.com
1 company
burktek.com
1 company
coon.visiondance.com
1 company
extplasticsheet.com
1 company
forteproducts.com
1 company

30 sources were cited across this cell's answers from 25 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

Missouri in context

Missouri ranks 8th of 26 measured states in this category. Each bar is the share of that state's tracked companies that AI assistants named at least once; across every measured state in this category the share is 7%.

Missouri (this report)Other measured statesCategory average (7%)

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