UnitedHealth Group's SEC filing (Form 8-K) — UNH's reaction is being measured
UNH's realized reaction is still being measured.
· SEC EDGAR · SEC filing · Form 8-K · Realized reaction, point-in-time, zero look-ahead.
Form 8-K UNITEDHEALTH GROUP INC For: Oct 13
Via SEC EDGAR
Reaction is being measured.
This event is recent. News Quantified labels the realized price reaction once the trading sessions after the news complete — point-in-time, with zero look-ahead. The measured move will appear here, and below in UNH’s reaction history.
UNH’s news landed in the pre-market window; the main session closed -0.28%.
- Mainprior session
- After-hours4:00 – 8:00 PM
- Overnightno tape
- Pre-market4:00 – 9:30 AM
- Main session9:30 AM – 4:00 PM
Segment widths are fixed, so two events on different days sit in comparable places. Hatched segments are real elapsed time with no tape to measure — the overnight halt is not a gap in the data. This event carries no intraday receipt time, so it is not pinned to a minute.
| Window | What it answers | Anchor price | Result |
|---|---|---|---|
| All | From the news to the first main-session close, across every session in between. | 387.99re-anchored to the first print after the news | -0.28% |
| After-hours | The move between the closing bell and the overnight halt. | — | not measured |
| Pre-market | The move between the pre-market open and the opening bell. | — | not measured |
| Main | The move inside the regular session, from the news to the close. | — | not measured |
The main-session result is measured upstream against the price at the news; the all-sessions result is computed here from its own anchor and close, so the two can differ in the last decimal. After-hours and pre-market are measured upstream but populate on a small minority of events, so this page does not request them. Those rows are unmeasured, not empty.
The same event measured across every session8
| Horizon | Reaction |
|---|---|
| 30 sec | -0.06% |
| 1 min | +0.36% |
| 5 min | -0.13% |
| 10 min | -0.12% |
| 30 min | -1.03% |
| 60 min | -0.71% |
| 90 min | -0.38% |
| 120 min | -0.38% |
Where this UNH event came from, and what the tape did with it.
UnitedHealth Group filed Form 8-K with the SEC on Oct 13, 2026. It was one of 2 UnitedHealth Group headlines News Quantified labeled that day, so its measurement window overlaps with the others on a shared tape. The same session also carried UnitedHealth Group's "UnitedHealth Group Reports Third Quarter 2026 Results", each measured on its own clock.
Against the price at the news timestamp, UNH's reaction is still being measured. Because several releases shared that day, their measurement windows overlap and no single headline cleanly owns the move.
How this compares to UNH’s usual reaction.
Across 2,000+ labeled events, UNH’s median 30-minute reaction to all news is -0.03% (48% up); by the close it is -0.11%.
| Middle 50% of UNH reactions | -0.57% to +0.53% |
|---|---|
| Median reaction (30-min) | -0.03% |
| Measured reactions | 2,000+ |
Half of all UnitedHealth Group news events land between -0.57% and +0.53% at 30 minutes; this one is a single draw from that distribution.
You just saw one reaction. There are 26M+ more.
See the full UNH reaction history →What the UNH tape carried around this event.
The 20-day average true range into this session was 9.26. UNH carries no market-cap or price-to-earnings figure on this record, and no short interest, so none is shown.
Email me when UNH moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to UNH's baseline. Nothing else.
How comparable UNH events have landed.
Across 5 other recent UnitedHealth Group SEC filing events, the median close-day reaction was -0.22%. Each is measured the same way, from its own news timestamp.
| Date | Headline | 5-min | To close |
|---|---|---|---|
| Form 8-K UNITEDHEALTH GROUP INC For: Sep 08 | -0.95% | -2.95% | |
| Form 8-K UNITEDHEALTH GROUP INC For: Jul 16 | -0.84% | -6.95% | |
| Form 11-K UNITEDHEALTH GROUP INC For: Dec 31 | -0.17% | +0.01% | |
| Form 8-K UNITEDHEALTH GROUP INC For: Jun 01 | -0.11% | +2.14% | |
| Form DEFA14A UNITEDHEALTH GROUP INC | -0.16% | -0.22% |
8 more UNH events, each measured the same way.
Recent UNH events, each with its measured reaction8
That same day, across the market6
Same measurement, same clock, different names — each headline measured from its own news timestamp, point-in-time.
Peer tickers, measured the same way4
Every US ticker is measured the same way, from its own news timestamp. Browse all tickers →
UNH carried 1 other record that day.
Each was measured the same way, from its own timestamp.
| Record | Event | 5-min | To close |
|---|---|---|---|
| UnitedHealth Group Reports Third Quarter 2026 Results | Press release | — | — |
How the numbers are made.
How was UNH's 5-minute reaction measured?
From the news timestamp, not the trading day: News Quantified takes the last trade before this SEC filing (Form 8-K) as the base price and measures the move five minutes of trading later — point-in-time, zero look-ahead. The same clock produced the to-close figure.
What is UnitedHealth Group's median reaction, and how does this event compare?
UnitedHealth Group's median is drawn from 2,000+ labeled events; at 30 minutes it sits at -0.03%, and -0.11% by the close. This event's move is one draw from that distribution — ordinary or outlier, the chart's median ticks show which.
2 UnitedHealth Group headlines shared Oct 13, 2026. Whose reaction is this?
Each of the 2 same-day UnitedHealth Group events is measured from its own timestamp, but their windows overlap on one tape, so we show the cluster rather than pretending a single headline owns the move.
Does a measured reaction predict UnitedHealth Group's next reaction?
No. a measured reaction is a realized fact about Oct 13, 2026, not a forecast. Past reactions describe a distribution; they say nothing certain about any future move.
How to cite this reaction.
News Quantified. "Form 8-K UNITEDHEALTH GROUP INC For: Oct 13." UNH realized price reaction, Oct 13, 2026. Retrieved from https://newsquantified.com/tickers/unh/news/form-8-k-unitedhealth-group-for-oct-13-2026-10-13
Canonical URL: https://newsquantified.com/tickers/unh/news/form-8-k-unitedhealth-group-for-oct-13-2026-10-13
Query this dataset via the API & MCP →