# KEITHLEY INSTRUMENTS INC — DEF 14A

KEITHLEY INSTRUMENTS INC of SOLON, OH filed a DEF 14A with the SEC on 1999-12-30. Industry: Instruments For Meas & Testing of  Electricity & Elec Signals.

## Filing

- Filed: 1999-12-30
- Form: DEF 14A
- Accession: 0000950152-99-010047
- Registrant: KEITHLEY INSTRUMENTS INC
- CIK: 0000054991
- Industry (SIC): Instruments For Meas & Testing of  Electricity & Elec Signals (3825)
- State of incorporation: OH
- Location: SOLON, OH

## Filing timeline for this registrant (28)

_Showing 12 of 28 filings._

| Filed | Form |
| --- | --- |
| [2010-11-16](https://search.stillhousedata.com/proxy/0000950123-10-105946) | DEFA14A |
| [2010-11-04](https://search.stillhousedata.com/proxy/0000950123-10-100639) | DEFA14A |
| [2010-10-28](https://search.stillhousedata.com/proxy/0000950123-10-097382) | DEFA14A |
| [2010-10-25](https://search.stillhousedata.com/proxy/0000950123-10-095690) | DEFA14A |
| [2010-10-25](https://search.stillhousedata.com/proxy/0000950123-10-095418) | DEFM14A |
| [2010-10-08](https://search.stillhousedata.com/proxy/0000950123-10-092383) | PREM14A |
| [2010-09-29](https://search.stillhousedata.com/proxy/0000950123-10-090105) | DEFA14A |
| [2009-12-29](https://search.stillhousedata.com/proxy/0000950123-09-073946) | DEF 14A |
| [2008-12-31](https://search.stillhousedata.com/proxy/0000950152-08-010908) | DEF 14A |
| [2007-12-28](https://search.stillhousedata.com/proxy/0000950152-07-009867) | DEF 14A |
| [2007-12-12](https://search.stillhousedata.com/proxy/0000950152-07-009571) | PRE 14A |
| [2007-01-04](https://search.stillhousedata.com/proxy/0000950152-07-000048) | DEF 14A |

## More

- [CIK 54991 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=54991&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0000950152-99-010047.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.