MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. is a South Dakota corporation, registered on October 23, 2000. It is based at 38 2nd Ave. E, Suite A, Dickinson, ND, 58601. The company is currently listed as active on the South Dakota register, is registered under company number FB024461 and carries EIN 450308907. Public records for the company include 1 SoS registration, 2 federal contracts and 16 Form 5500 filings. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. |
|---|---|
| Principal address | 38 2nd Ave. E, Suite ADickinson58601NDUnited States |
| Registration state | South Dakota |
| Status | Active |
| Formed in | North Dakota (foreign registration) |
| Home company | MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. · Active |
| Registered | 23 October 2000 (almost 26 years ago) |
| Entity type | Corporation |
| Standing | compliant |
| Company number | FB024461 |
| EIN | 450308907 |
| Employees (modeled) | ≈7 employees2024 |
| Registered agent | C T CORPORATION SYSTEM |
|---|
| Source registry | South Dakota Secretary of State · updated 15 June 2026 |
|---|
| Public records | 1 SoS registration |
|---|
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| Est. revenue (modeled) | $2M2024 |
|---|---|
| Federal contracts | $20K · 17 awards |
| Total obligated | $20K |
|---|---|
| Awards | 17 |
| Top agency | Department of Agriculture |
| Action date | Agency | Obligated | |
|---|---|---|---|
| 2015-04-17 | Department of Agriculture | $0 | |
| 2015-04-17 | Department of Agriculture | $0 | |
| 2014-12-09 | Department of Agriculture | $-3000 | |
| 2014-11-06 | Department of Agriculture | $-3000 | |
| 2013-11-19 | Department of Agriculture | $3K | |
| 2013-11-19 | Department of Agriculture | $3K | |
| 2013-11-19 | Department of Agriculture | $0 | |
| 2013-08-16 | Department of Agriculture | $3K | |
| 2013-08-15 | Department of Agriculture | $3K | |
| 2013-07-08 | Department of Agriculture | $3K | |
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| South DakotaTHIS | MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. | 2000-10-23 | C T CORPORATION SYSTEM | — | Active | |
Filing ID FB024461 Jurisdiction Foreign · CorporationFormed in North Dakota Principal address 38 2nd Ave. E, Suite A, Dickinson, ND, 58601 Registered agent C T CORPORATION SYSTEM319 S COTEAU ST, PIERRE, SD, 57501-3187 Officers Not reported | ||||||
| Montana | MACKOFF, KELLOGG, KIRBY & KLOSTER, P. C. | 1989-12-18 | C T CORPORATION SYSTEM | CHRISTINA M WENKOOfficer, Director | Active | |
| North Dakota | MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. | 1969-12-29 | Christina M Wenko | — | Active | |
Companies and people linked to MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. in the state registers through shared officers, a shared registered agent, shared filing contacts or a shared address. Service companies file for many unrelated businesses — a shared agent, address or contact alone does not prove affiliation.
company person group former role
Browse the indexed registries by state, or look up any debtor name free, at UCC lien search.
Employee-benefit plan filings by MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. with the Department of Labor. Employee and revenue figures are modeled estimates derived from retirement-plan participant counts and industry ratios — not official headcount or reported revenue.
| Employees (modeled) | ≈7 · plan year 2024 |
|---|---|
| Est. annual revenue (modeled) | $2M |
| Retirement plan assets | $2.1M |
| Benefit plans | 401(k) plan on file |
| Filing history | 26 plan years filed, 1999–2024 |
| Sponsor EIN | 45-0308907 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2024 | ≈7 | 24 (6 active) | $2.1M | $2M | 401(k) | |
| 2023 | ≈8 | 26 (7 active) | $2.3M | $2.2M | 401(k) | |
| 2022 | ≈7 | 27 (6 active) | $1.9M | $1.9M | 401(k) | |
| 2021 | ≈8 | 35 (7 active) | $2.3M | $2M | 401(k) | |
| 2020 | ≈31 | 47 (28 active) | $2.4M | $3.8M | 401(k) | |
| 2019 | ≈29 | 41 (26 active) | $2.2M | $6.9M | 401(k) | |
| 2018 | ≈33 | 58 (30 active) | $1.7M | $7M | 401(k) | |
| 2017 | ≈40 | 58 (36 active) | $3.3M | $8.3M | 401(k) | |
| 2016 | ≈50 | 67 (45 active) | $2.9M | $9.6M | 401(k) | |
| 2015 | ≈53 | 67 (48 active) | $2.7M | $10.5M | 401(k) | |
Matched Form 5500 filing records:
| Plan | Plan year | Participants | EIN | |
|---|---|---|---|---|
| MACKOFF KELLOGG KIRBY & KLOSTER P C PROFIT SHARING PLAN & TRUST | — | — | — | |
| MACKOFF KELLOGG PROFIT SHARING PLAN AND TRUST | — | — | — | |
| MACKOFF KELLOGG KIRBY & KLOSTER P C PROFIT SHARING PLAN & TRUST | — | — | — | |
| MACKOFF KELLOGG PROFIT SHARING PLAN AND TRUST | — | — | — | |
| MACKOFF KELLOGG KIRBY & KLOSTER P C PROFIT SHARING PLAN & TRUST | — | — | — | |
| MACKOFF KELLOGG PROFIT SHARING PLAN AND TRUST | — | — | — | |
| MACKOFF KELLOGG KIRBY & KLOSTER P C PROFIT SHARING PLAN & TRUST | — | — | — | |
| MACKOFF KELLOGG PROFIT SHARING PLAN AND TRUST | — | — | — | |
| MACKOFF KELLOGG KIRBY & KLOSTER P C PROFIT SHARING PLAN & TRUST | — | — | — | |
| MACKOFF KELLOGG PROFIT SHARING PLAN AND TRUST | — | — | — | |
Federal court records load when you reach this section.
Companies adjacent to MACKOFF, KELLOGG, KIRBY & KLOSTER, P.C. in the South Dakota Secretary of State register, in alphabetical order.
Netstate aggregates public records from federal, state and municipal sources; records are matched to this company by its registered legal names. Latest source snapshot 2026-06-17. Document getpalm-companies/6671-3070-4589.