Quantisnow SEC Filing Activity Index
SEC filing activity in March 2021
Last updated . Recomputed daily.
In March 2021, Quantisnow captured 45,283 SEC filings, down 15.8% from February; Form 4 was the most common at 53.4% of the total.
Key figures
- All SEC filings
- 45,283
- Prior month: 53,756
- Form 4 (insider)
- 24,186
- Prior month: 22,501
- Form 8-K
- 2,397
- Prior month: 0
- Form 10-Q
- 32
- Prior month: 0
- Form 10-K
- 857
- Prior month: 0
- Form 6-K (foreign issuers)
- 1,116
- Prior month: 0
- Form 3 (new insiders)
- 992
- Prior month: 888
- Form 144
- 13
- Prior month: 0
Filings by form type, March 2021
| Form | Filings | Share |
|---|---|---|
| Form 4 | 24,186 | 53.4% |
| Other forms | 10,105 | 22.3% |
| Form 8-K | 2,397 | 5.3% |
| Form 424B2 | 1,971 | 4.4% |
| Form 6-K | 1,116 | 2.5% |
| Form 3 | 992 | 2.2% |
| Form 10-K | 857 | 1.9% |
| Form DEFA14A | 728 | 1.6% |
| Schedule 13D | 464 | 1.0% |
| Schedule 13G | 426 | 0.9% |
| Form FWP | 416 | 0.9% |
| Form 425 | 329 | 0.7% |
| Form DEF 14A | 325 | 0.7% |
| Form 424B5 | 186 | 0.4% |
| Form S-8 | 162 | 0.4% |
| Form 424B3 | 117 | 0.3% |
| Form PRE 14A | 103 | 0.2% |
| Form S-3 | 66 | 0.1% |
| Form 5 | 60 | 0.1% |
| Form S-3ASR | 37 | 0.1% |
| Form DFAN14A | 36 | 0.1% |
| Form 10-Q | 32 | 0.1% |
| Schedule TOT | 22 | 0.0% |
| Schedule 14D-9 | 22 | 0.0% |
| Form S-1 | 22 | 0.0% |
| Form D | 14 | 0.0% |
| Dividends | 13 | 0.0% |
| Form 144 | 13 | 0.0% |
| Form 11-K | 13 | 0.0% |
| Form DEFM14A | 11 | 0.0% |
| Form S-4 | 11 | 0.0% |
| Form 15-12B | 10 | 0.0% |
| Form F-3ASR | 8 | 0.0% |
| Form PREC-14A | 7 | 0.0% |
| Form F-1 | 3 | 0.0% |
| Form F-X | 2 | 0.0% |
| Form POS EX | 1 | 0.0% |
Methodology
Quantisnow ingests the SEC EDGAR real-time feed and classifies each accepted filing by form type. Counts are filings about companies Quantisnow covers, bucketed by the month Quantisnow received them.
Form 4 includes every Form 4, including the purchases counted in the Insider Buying Index. Amendments are counted under their base form.
Counts are distinct Quantisnow wire items, bucketed by the calendar month (UTC) in which Quantisnow first received them. Each item carries one event category assigned by our parsers at ingest; an item is never counted in two categories.
Figures are recomputed daily from the Quantisnow event database. The current month is marked as month to date until it closes; closed months are recomputed for a few days after month end to pick up late filings, then stay fixed.
Definitions for every column are in the JSON download.
Metric definitions
- All SEC filings
- (
total) - Form 4 (insider)
- (
form4) - Form 8-K
- (
form8k) - Form 10-Q
- (
form10q) - Form 10-K
- (
form10k) - Form 6-K (foreign issuers)
- (
form6k) - Form 3 (new insiders)
- (
form3) - Form 144
- (
form144)
Download and cite
Free to reuse under CC BY 4.0 with attribution to Quantisnow and a link to this page.
Quantisnow. (2026). Quantisnow SEC Filing Activity Index, March 2021 [Data set]. Retrieved October 27, 2026, from https://www.quantisnow.com/data/sec-filings/2021-03
<figure style="margin:0;max-width:720px"><a href="https://www.quantisnow.com/data/sec-filings"><img src="https://www.quantisnow.com/data/sec-filings.svg" alt="Quantisnow SEC Filing Activity Index chart" width="720" height="340" style="width:100%;height:auto" loading="lazy"></a><figcaption style="font:12px sans-serif;color:#5b6470">Source: <a href="https://www.quantisnow.com/data/sec-filings">Quantisnow SEC Filing Activity Index</a> by Quantisnow</figcaption></figure>