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Private company

ELECTRO SENSORS INC

ELECTRO SENSORS INC is an American industrial instruments for measurement company.1 It is headquartered in Minnetonka, Minnesota.1

Last updated Oct 21, 2026.

Overview

  • IndustryIndustrial Instruments For Measurement, Display, and Control1
  • HeadquartersMinnetonka, Minnesota1
  • Incorporated inMN2
  • Business address6111 Blue Circle Dr, Minnetonka, Mn 55343-91082
  • Filer categoryNon-accelerated filer, Smaller reporting company2

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Electro-Sensors , Inc. (“we,” “us,” “our,” the “Company” or “ESI”) manufactures and sells industrial production monitoring and process control systems.3 From its latest annual report

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

50.8%Gross margin4
0.0%Operating margin4
3.0%Net margin4
8.2%Revenue growth, 20254
2.1%Return on equity4
$597.0KFree cash flow4

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue49¢$5.0M
  • Research and development10¢$991.0K
  • Other costs38¢$3.8M
  • Income tax0¢$41.0K
  • Profit3¢$306.0K

Out of $10.1M in revenue.4

Where each dollar of operating cash went, fiscal 2025

  • Capital spending10¢$65.0K
  • Kept or used elsewhere90¢$597.0K

Out of $662.0K of cash from operations.4

Financial statements

Revenue567894$10.1M in 2025+23% since 2019
0$5.0M$10.0M$15.0M2019: $8.3M$8.3M20192020: $7.6M$7.6M2020−8%2021: $8.6M$8.6M2021+13%2022: $9.0M$9.0M2022+5%2023: $8.6M$8.6M2023−5%2024: $9.4M$9.4M2024+10%2025: $10.1M$10.1M2025+8%
Gross profit567894$5.2M in 2025+18% since 2019
0$2.0M$4.0M$6.0M2019: $4.4M$4.4M20192020: $3.9M$3.9M2020−10%2021: $4.7M$4.7M2021+19%2022: $4.8M$4.8M2022+4%2023: $4.2M$4.2M2023−12%2024: $4.6M$4.6M2024+8%2025: $5.2M$5.2M2025+13%
Operating income567894$2.0K in 2025
-$400.0K-$200.0K0$200.0K$400.0K$600.0K2019: -$31.0K-$31.0K20192020: -$204.0K-$204.0K2020+558%2021: $441.0K$441.0K20212022: -$37.0K-$37.0K20222023: -$28.0K-$28.0K2023−24%2024: -$4.0K-$4.0K2024−86%2025: $2.0K$2.0K2025
Net income567894$306.0K in 2025+64% since 2019
-$200.0K0$200.0K$400.0K$600.0K2019: $187.0K$187.0K20192020: -$124.0K-$124.0K20202021: $410.0K$410.0K20212022: $100.0K$100.0K2022−76%2023: $275.0K$275.0K2023+175%2024: $446.0K$446.0K2024+62%2025: $306.0K$306.0K2025−31%
Fiscal year2019202020212022202320242025
Revenue$8.3M5$7.6M6$8.6M7$9.0M8$8.6M9$9.4M4$10.1M4
Cost of revenue$3.9M5$3.7M6$3.9M7$4.2M8$4.3M9$4.8M4$5.0M4
Gross profit$4.4M5$3.9M6$4.7M7$4.8M8$4.2M9$4.6M4$5.2M4
Research and development$811.0K5$836.0K6$876.0K7$836.0K8$973.0K9$1.0M4$991.0K4
Operating expenses$4.2M7$4.9M8$4.3M9$4.6M4$5.2M4
Operating income-$31.0K5-$204.0K6$441.0K7-$37.0K8-$28.0K9-$4.0K4$2.0K4
Income before tax$459.0K7$72.0K8$378.0K9$436.0K4$347.0K4
Income tax-$1.0K5-$48.0K6$49.0K7-$28.0K8$103.0K9-$10.0K4$41.0K4
Net income$187.0K5-$124.0K6$410.0K7$100.0K8$275.0K9$446.0K4$306.0K4
Earnings per share$0.065-$0.046$0.127$0.038$0.089$0.134$0.094
Earnings per share (diluted)$0.065-$0.046$0.127$0.038$0.089$0.134$0.094
Shares (weighted, basic)3.4M shares73.4M shares83.4M shares93.4M shares43.5M shares4
Shares (weighted, diluted)3.4M shares73.4M shares83.4M shares93.4M shares43.5M shares4

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Corporate structure

ELECTRO SENSORS INC sits at the top of its group. 1 entity, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of ELECTRO SENSORS INC

  • Jesse Feldman Filed SCHEDULE 13D on ELECTRO SENSORS INC, latest Apr 27, 2026
  • CALDWELL SUTTER CAPITAL, INC. Filed SCHEDULE 13G/A on ELECTRO SENSORS INC, latest Feb 11, 2025 (3 filings since Feb 10, 2023)
  • Lynne Elizabeth Peterson Filed SC 13D/A on ELECTRO SENSORS INC, latest Feb 21, 2024 (2 filings since Feb 14, 2024)
  • Jeffrey Dean Peterson Filed SC 13D on ELECTRO SENSORS INC, latest Feb 14, 2024
  • John Eberhart Peterson Filed SC 13D on ELECTRO SENSORS INC, latest Feb 14, 2024
  • Patricia Nancy Peterson Filed SC 13D on ELECTRO SENSORS INC, latest Feb 14, 2024
  • Paul Rodney Peterson Filed SC 13D on ELECTRO SENSORS INC, latest Feb 14, 2024
  • Activist Investing LLC Filed SC 13D/A on ELECTRO SENSORS INC, latest Oct 7, 2022 (2 filings since Jan 14, 2022)
  • RENAISSANCE TECHNOLOGIES LLC Filed SC 13G/A on ELECTRO SENSORS INC, latest Feb 10, 2022
  • ELECTRO SENSORS INC Minnetonka, Minnesota

Built from major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What ELECTRO SENSORS INC reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Property and equipment, before depreciation$2.6M4 Dec 31, 2025$2.5M4 Dec 31, 2024+2.8%
Accumulated depreciation$1.7M4 Dec 31, 2025$1.6M4 Dec 31, 2024+5.8%
Property and equipment, net$885.0K4 Dec 31, 2025$910.0K4 Dec 31, 2024−2.7%

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$10.5M4 Dec 31, 2025$9.9M4 Dec 31, 2024+6.0%
Marketable securities, current$56.0K4 Dec 31, 2025$56.0K4 Dec 31, 20240%

Inventory

ItemLatestA year beforeChange
Inventory, total$2.0M4 Dec 31, 2025$2.0M4 Dec 31, 2024+3.3%
Raw materials$1.3M4 Dec 31, 2025$1.3M4 Dec 31, 2024−1.9%
Work in process$353.0K4 Dec 31, 2025$301.0K4 Dec 31, 2024+17.3%
Finished goods$386.0K4 Dec 31, 2025$339.0K4 Dec 31, 2024+13.9%

Properties, in its own words

We own and occupy a 25,400 square foot facility at 6111 Blue Circle Drive, Minnetonka, Minnesota 55343-9108. All our operations are conducted within this facility. The facility is in excellent condition and we continue to maintain and update the facility as necessary. We believe the facility will be adequate for our needs in 2026.

Item 2 of the 10-K filed Mar 30, 2026.3

Leadership

Who has led ELECTRO SENSORS INC, and when. Pick a name to see everywhere that person has worked.

Chief executive

  1. Bradley D. Slye2006–2011
  2. David L. Klenk2013–now

Chair

  1. Bradley D. Slye2006–2011

President

  1. Bradley D. Slye2006–2011
  2. David L. Klenk2013–2016

Chief financial officer

  1. David L. Klenk2013–2016
2010201520202025
Board members and other officers (9)

Timeline

  1. Jul 31, 20268-K Completed an acquisition or sale; Listing notice or transfer; Change to shareholders' rights23
  2. Jul 27, 20268-K Shareholder vote24
  3. Apr 27, 20268-K Financial statements and exhibits25
  4. Apr 24, 20268-K Entered a material agreement26
  5. Apr 29, 20258-K Shareholder vote27
  6. Apr 29, 20248-K Shareholder vote28
  7. May 2, 20238-K Shareholder vote29
  8. Jan 31, 20238-K Entered a material agreement; Ended a material agreement; Other events30
  9. Sep 26, 20228-K Other events31
  10. Jun 14, 20228-K Entered a material agreement; Bylaws or fiscal year changed; Other events32
  11. Apr 25, 20228-K Shareholder vote33
  12. Jul 24, 2013New chief executive David L. Klenk becomes CEO13
  13. May 18, 2006New chief executive Bradley D. Slye becomes CEO14

Filings

82 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 11 major events, 18 insider forms, 13 large holders, 20 other. The latest 20:

  1. Aug 10, 202615-12G EDGAR
  2. Aug 7, 2026S-8 POS EDGAR
  3. Aug 7, 2026S-8 POS EDGAR
  4. Aug 7, 2026S-8 POS EDGAR
  5. Jul 31, 202625-NSE EDGAR
  6. Jul 31, 20268-K EDGAR
  7. Jul 27, 20268-K EDGAR
  8. Jun 26, 2026DEFM14A EDGAR
  9. May 28, 2026PREM14A EDGAR
  10. May 28, 2026SD EDGAR
  11. May 14, 202610-Q EDGAR
  12. Apr 27, 2026SCHEDULE 13D EDGAR
  13. Apr 27, 20268-K/A FORM 8K/A EDGAR
  14. Apr 24, 20268-K EDGAR
  15. Mar 30, 202610-K EDGAR
  16. Feb 18, 20264 EDGAR
  17. Nov 13, 202510-Q EDGAR
  18. Sep 12, 202510-Q/A EDGAR
  19. Aug 12, 202510-Q EDGAR
  20. May 30, 2025SD EDGAR

The 82 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

  • Jesse FeldmanSCHEDULE 13D, 1 filing Apr 27, 202634
  • CALDWELL SUTTER CAPITAL, INC.SCHEDULE 13G/A, 3 filings Feb 10, 2023 to Feb 11, 202535
  • Lynne Elizabeth PetersonSC 13D/A, 2 filings Feb 14, 2024 to Feb 21, 202436
  • Jeffrey Dean PetersonSC 13D, 1 filing Feb 14, 202437
  • John Eberhart PetersonSC 13D, 1 filing Feb 14, 202438
  • Patricia Nancy PetersonSC 13D, 1 filing Feb 14, 202439
  • Paul Rodney PetersonSC 13D, 1 filing Feb 14, 202440
  • Activist Investing LLCSC 13D/A, 2 filings Jan 14, 2022 to Oct 7, 202241
  • RENAISSANCE TECHNOLOGIES LLCSC 13G/A, 1 filing Feb 10, 202242

Funding

Where the company's money came from, by calendar year: private offerings filed with the SEC, federal grants, loans, contracts and other assistance from USAspending.gov, and PPP loans from the SBA. Each bar links to the records below.

Money received by year$645.2K 2020–2020
Money received by yearMoney received by year, 2020–2020: $645.2K in all. PPP loans $645.2K.$0$200K$400K$600K$800K2020 · PPP loans: $645.2K2020
Figures by year
YearPPP loansTotal
2020$645.2K$645.2K

PPP loans

Paycheck Protection Program loans of $150,000 and up, approved April 2020 to July 2021, from the SBA43. Matched to this company by name and state.

  1. Apr 27, 2020$645.2K PPP loan (first draw) from U.S. Bank, National Association43To ELECTRO-SENSORS, INC., Hopkins MN; no forgiveness recorded

SEC filer profile

How ELECTRO SENSORS INC is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARELECTRO SENSORS INC1
  • CIK0000351789
  • Employer ID (EIN)41-09434593
  • Filer statusNon-accelerated filer not an emerging growth company; a smaller reporting company; not a shell company3
  • Incorporated inMinnesota3
  • Fiscal year endsDecember 311
  • Industry code (SIC)3823 Industrial Instruments For Measurement, Display, and Control1
  • SEC reviewing officeOffice of Industrial Applications and Services, Division of Corporation Finance1
  • Business address6111 Blue Circle Dr, Minnetonka, MN 55343-91081
  • Mailing address6111 Blue Circle Dr, Minnetonka, MN 553431
  • Phone95293001001
  • Shares outstanding3,532,423 as of May 13, 202612
  • Public float$5.5M as of Jun 30, 20253
  • AuditorBoulay PLLP, Minneapolis, Minnesota PCAOB ID 542; no auditor attestation of internal control over financial reporting3
  • On EDGAR sinceAug 11, 19951
  • Filings420 in all: 4 (97), 10-Q (56), 10QSB (37), 8-K (36), DEF 14A (30), SC 13D/A (21), 10-K (18), SC 13G/A (16)1
    All 37 form types

    3 (14), SD (13), SC 13D (12), 10KSB (10), 4/A (8), SC 13G (7), 10KSB/A (4), CORRESP (4), UPLOAD (4), 10KSB40 (3), 425 (3), 5 (3), S-8 (3), S-8 POS (3), 10QSB/A (2), 8-K/A (2), ARS (2), 10-Q/A (1), 144 (1), 15-12G (1), 25-NSE (1), 3/A (1), 5/A (1), CT ORDER (1), DEFA14A (1), DEFM14A (1), PREM14A (1), SCHEDULE 13D (1), SCHEDULE 13G/A (1)

  • Latest filingsAnnual report (10-K) Mar 30, 2026
    Quarterly report (10-Q) May 14, 2026
    Proxy statement (DEF 14A) Mar 19, 2025
    Latest 8-K (8-K) Jul 31, 2026

Securities registered for trading

ClassSymbolExchange
Common StockELSENasdaq

From the cover page of the 10-K filed Mar 30, 2026 (Section 12(b) of the Exchange Act).3

Risk factors and legal proceedings

Legal proceedings

We are not the subject of any material legal proceedings as of the date of this filing and we are not aware of any material threatened litigation.

The opening of Item 3, Legal Proceedings.3

Sources

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