SEC 8-K Alerts — Only New Material Filings (Delta)

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Run this on a daily schedule and only ever see SEC 8-K filings you haven't seen before. The monitor pulls recent 8-Ks for your watched tickers or item codes, remembers every accession number it has already shown you, and in delta mode emits just the new ones — each tagged with a plain-English label like "Change in auditor" or "Officer/director departure." The first delta run records a baseline and emits nothing on purpose; after that, every run is a clean diff of genuinely new material events. No duplicate alerts, no inbox spam.

How the delta works (read this first)

In delta mode, the first run emits zero filings — it records a baseline of everything currently in your window so it can tell what is new next time. From the second run on, you only get filings that appeared since you last looked, deduped by accession number per watch query. Want to see everything in the window right now? Run once in full mode. This is an alerting tool over public EDGAR filings — not a real-time institutional feed, and not investment advice.

Use cases

• Daily watchlist digest — schedule with delta mode for a clean "what's new" 8-K feed.
• Auditor-change / restatement early warning — set item_codes to 4.01, 4.02.
• IR peer-disclosure monitor — watch competitors' tickers for new material events.
• Credit / counterparty risk watch — monitor portfolio names for distress filings.
• M&A desk feed — item 1.01 for new definitive agreements as they post.

Sample input

{
"tickers":["TSLA","NVDA"],
"item_codes":["1.01","5.02"],
"lookback_days":3,
"mode":"delta",
"max_filings":500
}

Sample output

{
"accession_number":"0001193125-26-004567",
"change_type":"added",
"cik":"0001318605",
"ticker":"TSLA",
"company":"Tesla, Inc.",
"form":"8-K",
"filing_date":"2026-06-27",
"period_ending":null,
"items":["5.02"],
"event_labels":["Officer/director departure or election"],
"event_descriptions":[],
"state":"TX",
"sic":"3711",
"filing_url":"https://www.sec.gov/Archives/edgar/data/1318605/000119312526004567/0001193125-26-004567-index.htm",
"matched_watch":true,
"detected_at":"2026-06-29T12:00:00+00:00"
}

FAQ

Why did my first run return zero filings? Delta mode's first run records a baseline; subsequent runs emit only new filings. Run full mode once to see everything in the window.

How do I stop getting duplicate alerts? Delta mode dedupes by accession number per watch query automatically.

Can I alert on only specific 8-K events? Yes — set item_codes (e.g. 4.01 auditor change, 5.02 executive change).

How often should I schedule it? Daily with a 3-day lookback_days is a safe overlap; tighten for higher-frequency watches.

Is this investment advice? No — it is an alerting tool on public EDGAR filings; always confirm against the official filing.

Related actors

• https://apify.com/nexgendata/sec-form-8k-material-events-scraper?fpr=2ayu9b
• https://apify.com/nexgendata/sec-edgar-8k-filings?fpr=2ayu9b
• https://apify.com/nexgendata/sec-event-router?fpr=2ayu9b
• https://apify.com/nexgendata/sec-corporate-events-mcp?fpr=2ayu9b
• https://apify.com/nexgendata/corporate-actions-tracker?fpr=2ayu9b