Sera Prognostics, Inc. - Class A (SERA)
SERA moved a median of +0.01% 30 minutes after news, and +0.59% by the close. How SERA actually reacts to news — the realized, point-in-time move the market made, measured across 527 labeled events over the last three years with zero look-ahead.
SERA’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 34% | 499 |
| 30-min | +0.01% | 50% | 521 |
| 60-min | +0.15% | 53% | 526 |
| to close | +0.59% | 54% | 503 |
| Middle 50% of SERA reactions | -1.25% to +1.58% |
|---|---|
| Median reaction (30-min) | +0.01% |
| Measured reactions | 527 |
Half of all Sera Prognostics, Inc. - Class A news events land between -1.25% and +1.58% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when SERA moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SERA's baseline. Nothing else.
Recent SERA events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| 1 in 10 U.S. Babies Are Born Too Early. A Leading OB-GYN Says Most Mothers Can Learn Their Risk by Week 21, and Do Something About It. | Press release | PR Newswire | — | +0.46% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Aug 14 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +5.53% | |
| SERA PROGNOSTICS APPOINTS SCOTT GLEASON CHIEF FINANCIAL OFFICER | Press release | PR Newswire | +0.00% | +5.53% | |
| Form 10-Q SERA PROGNOSTICS, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +1.97% | -0.98% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | +1.97% | -0.98% | |
| SERA PROGNOSTICS REPORTS SECOND QUARTER 2026 FINANCIAL RESULTS | Press release | PR Newswire | +1.97% | -0.98% | |
| SERA PROGNOSTICS ANNOUNCES CONFERENCE CALL AND WEBCAST OF SECOND QUARTER FISCAL YEAR 2026 FINANCIAL RESULTS ON AUGUST 12, 2026 | Press release | PR Newswire | +0.00% | +1.94% | |
| PRIME SUBGROUP ANALYSIS DEMONSTRATES 22% REDUCTION IN NICU ADMISSIONS IN FIRST-TIME PREGNANCIES USING PreTRM® Test-GUIDED CARE | Press release | PR Newswire | +0.00% | -3.43% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Jun 25 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +11.54% | |
| SERA PROGNOSTICS ANNOUNCES APPOINTMENT OF MARK CAPONE TO ITS BOARD OF DIRECTORS | Press release | PR Newswire | +0.00% | +11.54% | |
| SERA PROGNOSTICS COLLABORATES ON ARPA-H AWARD TO ADVANCE POINT-OF-CARE DIAGNOSTIC FOR SAFER BIRTH | Press release | PR Newswire | +0.00% | +0.00% | |
| SERA APPLAUDS ILLINOIS INITIATIVE TO EXPAND MEDICAID COVERAGE FOR PROTEOMIC BLOOD TESTING IN PREGNANCY | Press release | PR Newswire | +0.00% | -2.70% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Jun 04 | SEC filing · Form 8-K | SEC EDGAR | +2.64% | +0.88% | |
| Form 8-K SERA PROGNOSTICS, INC. For: May 26 | SEC filing · Form 8-K | SEC EDGAR | +2.73% | -6.85% | |
| Form DEFA14A SERA PROGNOSTICS, INC. | SEC filing · Form DEFA14A | SEC EDGAR | +2.73% | -6.85% | |
| SERA PROGNOSTICS ANNOUNCES BOARD TRANSITION | Press release | PR Newswire | +2.73% | -6.85% | |
| Form 10-Q SERA PROGNOSTICS, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.58% | +12.28% | |
| Form 8-K SERA PROGNOSTICS, INC. For: May 06 | SEC filing · Form 8-K | SEC EDGAR | -0.58% | +12.28% | |
| SERA PROGNOSTICS REPORTS FIRST QUARTER 2026 FINANCIAL RESULTS | Press release | PR Newswire | -0.58% | +12.28% | |
| Form ARS SERA PROGNOSTICS, INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +1.98% | -0.99% | |
| Form DEF 14A SERA PROGNOSTICS, INC. For: Apr 23 | SEC filing · Form DEF | SEC EDGAR | +1.98% | -0.99% | |
| Form DEFA14A SERA PROGNOSTICS, INC. | SEC filing · Form DEFA14A | SEC EDGAR | +1.98% | -0.99% | |
| SERA PROGNOSTICS ANNOUNCES CONFERENCE CALL AND WEBCAST OF FIRST QUARTER FISCAL YEAR 2026 FINANCIAL RESULTS ON MAY 6, 2026 | Press release | PR Newswire | -0.93% | -0.93% | |
| Form 10-K SERA PROGNOSTICS, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -3.61% | -0.56% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Mar 18 | SEC filing · Form 8-K | SEC EDGAR | -3.61% | -0.56% | |
| Form S-8 SERA PROGNOSTICS, INC. | SEC filing · Form S-8 | SEC EDGAR | -3.61% | -0.56% | |
| SERA PROGNOSTICS REPORTS FOURTH QUARTER AND FULL YEAR 2025 FINANCIAL RESULTS | Press release | PR Newswire | -3.61% | -0.56% | |
| SERA PROGNOSTICS ANNOUNCES CONFERENCE CALL AND WEBCAST OF FOURTH QUARTER AND FISCAL YEAR 2025 FINANCIAL RESULTS ON MARCH 18, 2026 | Press release | PR Newswire | — | -4.72% | |
| SERA PROGNOSTICS TO PRESENT AT TD COWEN 46th ANNUAL HEALTH CARE CONFERENCE | Press release | PR Newswire | -1.69% | -2.63% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Jan 08 | SEC filing · Form 8-K | SEC EDGAR | -1.33% | -1.86% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Jan 07 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +6.80% | |
| Hera Women's Health Highlights Sera Prognostics PRIME Trial Results Led by Brian K. Iriye, MD Showing Biomarker-Guided Care Improves Newborn Outcomes and Reduces NICU Use | Press release | PR Web | +1.21% | +6.65% | |
| Landmark Study Finds PreTRM® Blood Test Reduces Earliest Preterm Births and Newborn Complications | Press release | PR Newswire | +0.00% | +6.80% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Nov 24 | SEC filing · Form 8-K | SEC EDGAR | — | +0.59% | |
| Sera Announces Publication Acceptance for PRIME Study | Press release | PR Newswire | -4.03% | +4.64% | |
| SERA PROGNOSTICS ANNOUNCES CONFERENCE CALL AND WEBCAST OF THIRD QUARTER FISCAL YEAR 2025 FINANCIAL RESULTS ON NOVEMBER 13, 2025 | Press release | PR Newswire | +3.46% | -1.21% | |
| Sera Prognostics Names Dr. Tiffany Inglis Chief Medical Officer | Press release | PR Newswire | +0.00% | -1.67% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Sep 05 | SEC filing · Form 8-K | SEC EDGAR | -0.30% | -5.09% | |
| SERA PROGNOSTICS TO PRESENT AT H.C. WAINWRIGHT 27TH ANNUAL GLOBAL INVESTMENT CONFERENCE | Press release | PR Newswire | -2.98% | +8.07% | |
| Form 10-Q SERA PROGNOSTICS, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.78% | +1.56% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | +0.78% | +1.56% | |
| SERA PROGNOSTICS REPORTS SECOND QUARTER 2025 FINANCIAL RESULTS | Press release | PR Newswire | +0.78% | +1.56% | |
| Sera Prognostics Announces Conference Call and Webcast of Second Quarter Fiscal Year 2025 Financial Results on August 6, 2025 | Press release | PR Newswire | +0.86% | -1.38% | |
| Form 8-K SERA PROGNOSTICS, INC. For: Jun 05 | SEC filing · Form 8-K | SEC EDGAR | -2.45% | -4.91% | |
| SERA PROGNOSTICS TO PARTICIPATE IN UPCOMING INVESTOR CONFERENCES | Press release | PR Newswire | +2.41% | -1.21% | |
| SERA PROGNOSTICS TO PRESENT AT RBC GLOBAL HEALTHCARE CONFERENCE | Press release | PR Newswire | +1.77% | +5.53% | |
| Form 8-K SERA PROGNOSTICS, INC. For: May 08 | SEC filing · Form 8-K | SEC EDGAR | +1.91% | +5.71% | |
| SERA PROGNOSTICS APPOINTS LEE ANDERSON AS CHIEF COMMERCIAL OFFICER | Press release | PR Newswire | +1.91% | +5.71% | |
| Form 10-Q SERA PROGNOSTICS, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -3.29% | -12.76% | |
| Form 8-K SERA PROGNOSTICS, INC. For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -3.29% | -12.76% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SERA section they belong to.
Where else SERA is measured.
SERA earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Sera Prognostics, Inc. - Class A's median reaction calculated?
Every labeled SERA news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 527 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 50% of SERA's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does SERA's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.