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ATS-N/MA

Form ATS-N/MA material amendments

Form ATS-N/MA: a material amendment to Form ATS-N, filed at least 30 days before a material change to an NMS stock ATS takes effect.

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308filings on EDGAR
2019first filed
53filed in 2026
2026-10-08latest filing
curl -H "Authorization: Bearer $SECFEED_KEY" \
  "https://secfeedapi.com/v1/filings?query=formType:%22ATS-N/MA%22&size=2"
import os, requests

r = requests.get(
    "https://secfeedapi.com/v1/filings",
    params={'query': 'formType:"ATS-N/MA"', 'size': '2'},
    headers={"Authorization": f"Bearer {os.environ['SECFEED_KEY']}"},
)
print(r.json())

What is ATS-N/MA?

Under Rule 304(a)(2)(i)(A) of Regulation ATS, an NMS stock ATS must file a material amendment before implementing a material change to its operations, such as new order types or changes in how orders interact. EDGAR tags these ATS-N/MA.

About 300 have been filed since 2019.

Who files

NMS stock alternative trading systems.

When it is filed

At least 30 calendar days before the material change is implemented.

Filings per year

Every ATS-N/MA filing on EDGAR, counted from the SecFeed index. Updated daily.

2019: 25 filings2020: 44 filings2021: 38 filings2022: 33 filings2023: 39 filings2024: 43 filings2025: 33 filings2026: 53 filings2019202020252026

What is inside

SectionContents
Description of changeThe new or changed functionality.
Amended itemsUpdated parts of the ATS-N.

Get ATS-N/MA data with SecFeed

Search the filings with formType:"ATS-N/MA", read any document as text or PDF, and use these APIs for structured data:

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Latest ATS-N/MA filings

CompanyFormFiled
INTERACTIVE BROKERS LLCATS-N/MA2026-10-08EDGAR ↗
TMX ALPHA US, LLCATS-N/MA2026-10-05EDGAR ↗
BIDS TRADING L.P.ATS-N/MA2026-10-05EDGAR ↗
PURESTREAM, LLCATS-N/MA2026-09-23EDGAR ↗
UBS SECURITIES LLCATS-N/MA2026-09-17EDGAR ↗
BLUE OCEAN ATS, LLCATS-N/MA2026-09-09EDGAR ↗
INTELLIGENT CROSS LLCATS-N/MA2026-09-09EDGAR ↗
NATIONAL FINANCIAL SERVICES LLCATS-N/MA2026-09-01EDGAR ↗

Use cases

Related forms

ATS-NAlternative trading system disclosure

Form ATS-N disclosures of dark pools and other NMS stock alternative trading systems: order types, fees, segmentation and operator conflicts.

ATS-N/UAATS-N updating amendment

Form ATS-N/UA: an updating amendment to an NMS stock alternative trading system's Form ATS-N, required under Rule 304(a)(2)(i)(B).

FAQ

How early must a material amendment be filed?

At least 30 calendar days before the change takes effect.

What counts as material?

Changes to operations or to the activities of the broker-dealer operator that would be material to subscribers.

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