Quantisnow SEC Filing Activity Index
SEC filing activity in September 2026
Last updated . Recomputed daily.
In September 2026, Quantisnow captured 20,241 SEC filings, down 33.3% from August; Form 4 was the most common at 48.6% of the total.
Key figures
- All SEC filings
- 20,241
- Prior month: 30,363
- Form 4 (insider)
- 9,831
- Prior month: 11,684
- Form 8-K
- 3,043
- Prior month: 4,921
- Form 10-Q
- 172
- Prior month: 2,908
- Form 10-K
- 109
- Prior month: 102
- Form 6-K (foreign issuers)
- 1,928
- Prior month: 2,232
- Form 3 (new insiders)
- 785
- Prior month: 811
- Form 144
- 432
- Prior month: 582
Filings by form type, September 2026
| Form | Filings | Share |
|---|---|---|
| Form 4 | 9,831 | 48.6% |
| Form 8-K | 3,043 | 15.0% |
| Form 6-K | 1,928 | 9.5% |
| Form FWP | 1,093 | 5.4% |
| Other forms | 1,011 | 5.0% |
| Form 3 | 785 | 3.9% |
| Form 144 | 432 | 2.1% |
| Form 424B3 | 270 | 1.3% |
| Form DEFA14A | 242 | 1.2% |
| Form 425 | 228 | 1.1% |
| Form EFFECT | 194 | 1.0% |
| Form 10-Q | 172 | 0.8% |
| Form 424B5 | 162 | 0.8% |
| Form DEF 14A | 137 | 0.7% |
| Form 10-K | 109 | 0.5% |
| Form S-8 | 101 | 0.5% |
| Form S-8 POS | 77 | 0.4% |
| Form PRE 14A | 70 | 0.3% |
| Form S-3 | 64 | 0.3% |
| Form S-1 | 51 | 0.3% |
| Form S-4 | 42 | 0.2% |
| Form D | 36 | 0.2% |
| Form F-1 | 34 | 0.2% |
| Form DFAN14A | 34 | 0.2% |
| Form S-3ASR | 28 | 0.1% |
| Form DEFM14A | 24 | 0.1% |
| Form POS EX | 11 | 0.1% |
| Schedule 14D-9 | 8 | 0.0% |
| Form 11-K | 8 | 0.0% |
| Dividends | 7 | 0.0% |
| Form F-3ASR | 2 | 0.0% |
| Form F-X | 2 | 0.0% |
| Form 5 | 2 | 0.0% |
| Schedule TOT | 2 | 0.0% |
| Form PREC-14A | 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, September 2026 [Data set]. Retrieved October 28, 2026, from https://www.quantisnow.com/data/sec-filings/2026-09
<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>