# MAINSPRING INC

MAINSPRING INC is a company headquartered in Cambridge, MA, United States.

## Company overview

- **Legal name:** MAINSPRING INC
- **Former names in filing history:** MAINSPRING COMMUNICATIONS INC (2000-02-11 to 2000-04-11)
- **Classification:** Company
- **Industry (SIC):** 7389 — Services-Business Services, NEC
- **Headquarters:** Cambridge, MA, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0001017174

## About

MAINSPRING INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0001017174, and its reported industry is Services-Business Services, NEC. The retained history contains 12 filings, including SC 13G filed on 2002-02-01. Each filing retains its accession, filing date and original SEC document link. This historical evidence does not establish current registration, listing, ownership or financial condition.

## Recent SEC filings

- Form SC 13G — filed 2002-02-01 — SCHEDULE 13G AMENDMENT
- Form SC 13G — filed 2001-05-18 — REGISTRATION STATEMENT
- Form SC 13D — filed 2001-05-17
- Form 10-Q — filed 2001-05-14 — period 2001-03-31 — FORM 10-Q (HTML)
- Form SC 13D — filed 2001-05-01
- Form 10-K/A — filed 2001-04-30 — period 2000-12-31 — AMENDMENT #1 TO FORM 10-K
- Form 8-K — filed 2001-04-20 — period 2001-04-19 — FORM 8-K
- Form 10-K — filed 2001-03-30 — period 2000-12-31 — FORM 10-K
- Form SC 13G — filed 2001-02-14 — GRAYLOCK
- Form SC 13G — filed 2001-02-14 — SCHEDULE 13G
- Form SC 13G — filed 2001-02-14 — SCHEDULE 13G - 02-14-01 - MAINSPRING INCORPORATED
- Form SC 13G — filed 2001-02-13 — STATEMENT OF BENEFICIAL OWNERSHIP

---

Updated: 2026-10-23T22:24:09Z

Canonical page: https://altss.com/profile/mainspring-inc

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology