S-1: This filing is a pre-effective registration statement submitted when a company decides to goes public. Commonly referred to as an "IPO" (Initial Public Offering) filing.

S-1/A: This filing is a pre-effective amendment to an S-1 IPO filing.

S-1MEF: Registration of up to an additional 20% of securities for any offering registered on an S-1.

POS AM: This filing is a post-effective amendment to an S-Type filing.

S-2: This filing is an optional registration form that may be used by companies which have reported under the '34 Act for a minimum of three years and have timely filed all required reports during the 12 calendar months and any portion of the month immediately preceding the filing of the registration statement.

S-2/A: This filing is a pre-effective amendment to an S-2 filing.

S-2MEF: Registration of up to an additional 20% of securities for any offering registered on an S-2.

S-3: This filing is the most simplified registration form and it may only be used by companies which have reported under the '34 Act for a minimum of three years and meet the timely filing requirements set forth under Form S-2. The filing company must also meet the stringent qualitative tests prescribed by the form.

S-3/A: This filing is a pre-effective amendment to an S-3 filing.

S-3MEF: Registration of up to an additional 20% of securities for any offering registered on a S-3.

S-3D: Registration statement of securities pursuant to dividend or interest reinvestment plans which become effective automatically upon filing.

S-3DPOS: This filing is a post-effective amendment to an S-3D filing.

S-4: This filing is for the registration of securities issued in business combination transactions.

S-4/A: This filing is a pre-effective amendment to an S-4 filing.

S-4EF: Filed when securities are issued in connection with the formation of a bank, savings and loan, or holding company.

S-4EF/A: This filing is a pre-effective amendment to an S-4EF filing.

S-4 POS: This filing is a post-effective amendment to an S-4EF filing.

S-6: Initial registration statement for unit investment trusts.

S-6/A: This filing is a pre-effective amendment to an S-6 filing.

S-8: This filing is required when securities are to be offered to employees pursuant to employee benefit plans.

S-8 POS: This filing is a post-effective amendment to an S-8 filing.

S-11: Filing for the registration of securities of certain real estate companies.

S-11/A: This filing is a pre-effective amendment to an S-11 filing.

S-11MEF: Registration of up to an additional 20% of securities for any offering registered on a S-11.

SB-1: An optional filing for small business issuers for the registration of securities to be sold to the public.

SB-1/A: This filing is a pre-effective amendment to an SB-1 filing.

SB-1MEF: Registration of up to an additional 20% of securities for any offering registered on a SB-1.

SB-2: Also an optional filing for small business issuers for the registration of securities to be sold to the public.

SB-2/A: This filing is a pre-effective amendment to an SB-2 filing.

SB-2MEF: Registration of up to an additional 20% of securities for any offering registered on a SB-2.

424A: Contains substantive changes from or additions to a prospectus previously filed with the SEC as part of the registration statement.

424B1: A form of prospectus that discloses information previously omitted from the prospectus filed as part of a registration statement.

424B2: A form of prospectus filed in connection with a primary offering of securities on a delayed basis which includes the public offering price, description of securities and specific method of distribution.

424B3: A form of prospectus that reflects facts or events that constitute a substantive change from or addition to the information set forth in the last form of prospectus filed with the SEC.

424B4: A form of prospectus that discloses information, facts or events covered in both form 424B1 and form 424B3.

424B5: A form of prospectus that discloses information, facts or events covered in both form 424B2 and form 424B3.

RW: Request for a withdrawal of a previously filed registration statement.

AW: Amendment to a previously filed RW.

PRE 14A: A preliminary proxy statement providing official notification to designated classes of shareholders of matters to be brought to a vote at a shareholders meeting.

PREM14A: A preliminary proxy statement relating to a merger or acquisition.

PREM14C: A preliminary information statement relating to a merger or acquisition.

PRES14A: A preliminary proxy statement giving notice regarding a special meeting.

DEF 14A: Provides official notification to designated classes of shareholders of matters to be brought to a vote at a shareholders meeting. This form is commonly refered to as a "Proxy".

DEFM14A: Provides official notification to designated classes of shareholders of matters relating to a merger or acquistion.

DEFM14C: A definitive information statement relating to a merger or an acquisition.

DEFS14A: A definitive proxy statement giving notice regarding a special meeting.

DEFS14C: A definitive information statement regarding a special meeting.

10-Q: A quarterly report which provides a continuing view of a company's financial position during the year. The filing is due 45 days after each of the first three fiscal quarters. No filing is due for the fourth quarter.

10-Q/A: Amendment to a previously filed 10-Q.

10QSB: A quarterly report which provides a continuing view of a company's financial position during the year. The 10QSB form is filed by small businesses.

10QSB/A: An amendment to a previously filed 10QSB.

NT 10-Q: Notification that form type 10-Q will be submitted late.

NT 10-Q/A: Amendment to a previously filed NT 10-Q.

ARS: An annual report to security holders. This is a voluntary filing on EDGAR.

10-K: An annual report which provides a comprehensive overview of the company for the past year. The filing is due 90 days after the close of the company's fiscal year, and contains such information as company history, organization, nature of business, equity, holdings, earnings per share, subsidiaries, and other pertinent financial information.

10-K/A: Amendment to a previously filed 10-K.

10-K405: An annual report which provides a comprehensive overview of the company for the past year. The Regulation S-K Item 405 box on the cover page is checked.

10-K405/A: This filing is an amendment to a previously filed 10-K405.

NT 10-K: Notification that form 10-K will be submitted late.

NT 10-K/A: Amendment to a previously filed NT 10-K.

10KSB: An annual report which provides a comprehensive overview of the company for the past year. The filing is due 90 days after the close of the company's fiscal year, and contains such information as company history, organization, nature of business, equity, holdings, earnings per share, subsidiaries, and other pertinent financial information. The 10KSB is filed by small businesses.

10KSB/A: Amendment to a previously filed 10KSB.

10-C: This filing is required of an issuer of securities quoted on the NASDAQ Interdealer Quotation System, and contains information regarding a change in the number of shares outstanding or a change in the name of the issuer.

10-C/A: Amendment to a previously filed 10-C.

8-K: A report of unscheduled material events or corporate changes which could be of importance to the shareholders or to the SEC. Examples include acquisition, bankruptcy, resignation of directors, or a change in the fiscal year.

8-K/A: Amendment to a previously filed 8-K.

11-K: An annual report of employee stock purchase, savings and similar plans.

11-K/A: Amendment to a previously filed 11-K.

NT 11-K: Notification that form 11-K will be submitted late.

NT 11-K/A: Amendment to a previously filed NT 11-K.

SC 13D: This filing is made by person(s) reporting beneficially owned shares of common stock in a public company.

SC 13D/A: An amendment to a SC 13D filing.

SC 13G: A statement of beneficial ownership of common stock by certain persons.

SC 13G/A: An amendment to the SC 13G filing.

3: An initial filing of equity securities filed by every director, officer, or owner of more than ten percent of a class of equity securities. Contains information on the reporting person's relationship to the company and on purchases and sales of equity securities. This form type is not required to be filed with the EDGAR system.

3/A: An amendment to a 3 filing. This form is not required to be filed with the EDGAR system.

4: Any changes to a previously filed form 3 are reported in this filing. This form type is not required to be filed with the EDGAR system.

5: An annual statement of ownership of securities filed by every director, officer, or owner of more than ten percent of a class of equity securities. Contains information on the reporting person's relationship to the company and on purchases and sales of equity securities. This form type is not required to be filed with the EDGAR system.

144: Notice of proposed sale of securities. This form type is not required to be filed with the EDGAR system.

NSAR-A: Semi-Annual report for management companies.

NSAR-A/A: Amendments to a previously filed NSAR-A.

NSAR-B: Annual report for management companies.

NSAR-B/A: Amendments to a previously filed NSAR-B.

NSAR-U: Annual report for unit investment trusts.

NSAR-U/A: Amendments to a previously filed NSAR-U.

NT-NSAR: Request for an extension of time for filing form NSAR-A, NSAR-B or NSAR-U.

NT-NSAR/A: Amendments to a previously filed NT-NSAR.

N-1A: Registration statement for Mutual Funds.

N-2: Registration statement for closed-end investment companies.

N-2/A: This filing is a pre-effective amendment to an N-2 filing.

N-3: Registration statement for separate accounts (management investment companies).

N-3/A: This filing is a pre-effective amendment to an N-3 filing.

N-4: Registration statement for separate accounts (unit investment trusts).

N-4/A: This filing is a pre-effective amendment to an N-4 filing.

N-5: Registration statement for small business investment companies.

N-5/A: This filing is a pre-effective amendment to an N-5 filing.

F-1: Registration statement for certain foreign private issuers.

F-1/A: This filing is a pre-effective amendment to an F-1 filing.

F-1MEF: Registration of up to an additional 20% of securities for an offering filed on an F-1.

Definitions provided courtesy of Edgar-Online.

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