What Calcium Products does

Calcium Products, LLC is a privately held U.S. manufacturer of pelletized calcium-based fertilizers founded in 1987 and headquartered in Ames, Iowa. The company produces two core products: 98G, a pelletized limestone made from 98% pure calcium carbonate with 94% CCE purity and ultra-fine particles designed to correct and maintain soil pH; and SO4, a pelletized dihydrate gypsum providing 21% calcium and 17% sulfur as a season-long, pH-neutral sulfur source for crops. Both are manufactured at the company's Iowa production facilities (Fort Dodge North, Fort Dodge East, Gilmore City, and Alden), with a new 113-acre plant under construction in Blair, Nebraska (late 2026 target completion). 98G is OMRI-certified for organic use, and the pelletized form factor allows blending with other dry fertilizers for single-pass application.

The company sells exclusively through an agricultural retailer/dealer network across the United States, supported by Territory Sales Managers covering Iowa, Nebraska, Minnesota, Wisconsin, Northern Illinois, and a Professional Turf vertical serving golf courses and sports turf. Pricing is volume-tiered annually (price sheets released each June and December) with fill and prepay discount programs; revenue mechanics are unit-pricing of bulk and packaged fertilizer SKUs. Customers are Midwestern row-crop growers (corn, soybeans, alfalfa) and professional turf managers; the company has invested in a broad field-trial dataset (126+ corn trials, 62 soybean trials across 7 states) demonstrating yield gains of +12.9 bu/A on corn and +2.0–3.5 bu/A on soybeans versus untreated controls. The company supports dealers with digital tools including application-rate calculators and a 2025 Soil pH & Nutrient Efficiency Economics Calculator, plus seasonal CEU-credit webinars for agronomists.

Calcium Products operates as an LLC led by President & CEO Mike Hogan (appointed 2013, prior 24-year career at John Deere) with VP of R&D Andrew Hoiberg, Ph.D., a sales team expanded across 2021–2025, and an 11–50 employee base. The company is founder/private-owned with no disclosed institutional investors, no parent company, and no public listing.

Name

Calcium Products

Legal name

Calcium Products, LLC

Website

https://calciumproducts.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

11–50 employees

Short description

Calcium Products is a privately held Iowa-based manufacturer of pelletized calcium-based fertilizers (98G limestone and SO4 gypsum) sold through U.S. ag retailer and professional turf dealer networks to Midwestern row-crop growers and golf/sports turf managers, with a new Nebraska plant under construction.

Ownership category

akta.pro rank

Product category

Specialty Agricultural Fertilizers

NAICS

Lime and Gypsum Product Manufacturing (3274), Gypsum Product Manufacturing (327420), Lime Manufacturing (32741), Fertilizer and Compost Manufacturing (32531)

SIC

Concrete, Gypsum & Plaster Products (3270)

akta.pro primary industry

Mineral Soil Amendments (Lime, Gypsum, Rock Phosphate, Sulfur, Trace Minerals) (AFABAKAF)

akta.pro secondary industries

Gypsum & Calcium Sulfate Amendments (AFABADAB), Secondary Nutrient Fertilizers (Sulfur, Calcium, Magnesium) (AFABABAF), Secondary Nutrient Specialty Fertilizers (Calcium, Magnesium, Sulfur) (AFABACAJ), Soil Amendments & Conditioners (Lime/Gypsum/Humates) (IMAEAEAH)

Keywords

• Pelletized limestone fertilizer
• Pelletized gypsum fertilizer
• Soil pH correction
• Sulfur crop nutrition
• Calcium-based fertilizers

Headquarters

HQ city

Ames

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Fertilizer Product Sales: Calcium Products generates revenue through the manufacture and sale of calcium-based fertilizers. Primary products are 98G pelletized limestone (for soil pH correction/maintenance) and SO4 pelletized gypsum (for sulfur delivery). Products are sold through a dealer network to agricultural growers and professional turf managers. The company offers bulk and packaged products with pricing tiers based on annual purchase volume. Discount programs include fill (pre-season reservation) discounts and prepay discounts.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Calcium Products manufactures and sells calcium-based specialty fertilizers — 98G pelletized limestone for soil pH correction and maintenance, and SO4 pelletized gypsum for sulfur delivery and calcium supplementation. Products are produced in Iowa from high-purity limestone and dihydrate gypsum deposits, pelletized for blending with other dry fertilizers, and sold through a U.S. agricultural retailer/dealer network to row-crop growers and professional turf managers.

Product overview

Calcium Products offers a focused portfolio of calcium-based fertilizers centered on two core products: 98G Pelletized Limestone for soil pH correction and maintenance, and SO4 Pelletized Gypsum for sulfur delivery and soil amendment. Both products are manufactured in Iowa atop pure limestone and gypsum deposits. The portfolio also includes smaller-grade Professional Turf products for golf courses and sports turf, the 98G Challenge program for field trials, and complementary digital calculator tools. The company serves the agriculture industry (corn, soybeans, alfalfa, other row crops) as well as the professional turf market. Products can be blended with other dry fertilizers for combined application.

Differentiator

Problem solved

Functional benefit

Brands

• 98G: Pelletized limestone product for soil pH correction and maintenance, manufactured in Iowa from 98% pure limestone deposits
• SO4

Products and services

• 98G Pelletized Limestone Pelletized limestone product — the company's flagship soil pH correction and maintenance fertilizer. Manufactured in Iowa from 98% pure calcium carbonate limestone with 94% CCE purity, ultra-fine particle size (90%+ through 100-mesh), 36% calcium content, less than 0.5% magnesium, and OMRI certification for organic use. Sold in bulk and packaged form via the U.S. dealer network to ag retailers and growers who use it for pH correction and maintenance programs to maximize nutrient availability and crop yields.
• SO4 Pelletized Gypsum Pelletized gypsum product — the company's sulfur delivery and soil amendment fertilizer. Manufactured in Iowa from one of the purest dihydrate gypsum sources in the world; delivers 21% calcium and 17% sulfur in a pH-neutral, season-long release pellet. Available in three SGN (Size Guide Number) grades — standard, mini, and micro — to fit every turfgrass and blending application. Sold in bulk and packaged form via the U.S. dealer network to ag retailers and turf managers.
• Professional Turf Products Smaller-grade pelletized formulations of 98G and SO4 specifically designed for the professional turf industry, including golf course and sports turf applications. Targets superintendents and turf managers dealing with heavy clay soils, salt buildup from fertilizers, soil structure issues, and turfgrass nutrition needs. Sized for blending flexibility and accurate application on turf equipment.

Quantifiable outcome

• SO4 increases corn yield by 12.9 bu/A vs no sulfur (126 trials across 7 Midwestern states)
• +4 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators9 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Nutrien Ag Solutions: Nutrien is the world's largest fertilizer producer and the largest ag retailer in North America. Competes with Calcium Products as a broad incumbent offering lime, gypsum, sulfur, and full NPK portfolios through its retail network that overlaps with Calcium Products' dealer base.
• Yara International: Yara is a global nitrogen fertilizer leader with a growing specialty crop nutrition portfolio. Competes broadly with Calcium Products in fertilizer inputs, particularly in sulfur-containing fertilizers, though Yara's focus is nitrogen rather than calcium-based amendments.
• The Mosaic Company: Mosaic is a leading phosphate and potash producer with growing specialty plant nutrition offerings. While not a direct calcium products competitor, Mosaic is a broad incumbent in the soil fertility inputs space with overlapping grower customers.

Direct peers

• Koch Agronomic Services: Koch Agronomic Services sells specialty fertilizers including sulfur-enhanced nitrogen products and micronutrient solutions that compete with Calcium Products' SO4 for sulfur-deficient acres. Comparable specialty ag-inputs business model with dealer-driven GTM.
• Graymont: Graymont is a North American lime producer with agricultural lime products competing with 98G in the soil pH correction market. Operates lime processing facilities across the U.S. and Canada with overlapping dealer networks in the Midwest.
• Beneficial Reuse Management: Beneficial Reuse Management manufactures gypsum-based soil amendments from coal-fired power plant FGD gypsum. Directly comparable to Calcium Products in the agricultural gypsum/amendment category with overlapping dealer distribution and customer base.
• Lhoist: Lhoist is a global lime producer with agricultural lime (aglime) products competing directly with Calcium Products' 98G pelletized limestone. Both target soil pH correction in row crops and turf, with Lhoist offering a broader portfolio of limestone and dolomitic lime products.
• Gypsoil: Gypsoil is a direct competitor selling pelletized gypsum (synthetic gypsum) for agricultural sulfur delivery and soil amendment. Headquartered in the Midwest, it competes head-to-head with Calcium Products' SO4 product across corn and soybean acres.
• Carmeuse: Carmeuse is a major global lime producer with agricultural lime and soil amendment products. Directly comparable to Calcium Products' limestone offerings, with overlapping end markets in agriculture and turf management.

Emerging players

• ICL Group: ICL Group is a specialty minerals and fertilizer company producing potash, phosphate, and specialty plant nutrition products. Partially overlaps with Calcium Products in specialty fertilizer and soil amendment categories, with growing focus on specialty ag inputs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/CalciumProducts
• YouTubeyoutube.com/user/CalciumProducts
• Facebookfacebook.com/CalciumProducts

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calcium Products