Seer, Inc. - Class A (SEER)
SEER moved a median of 0.00% 30 minutes after news, and -0.47% by the close. How SEER actually reacts to news — the realized, point-in-time move the market made, measured across 281 labeled events over the last three years with zero look-ahead.
SEER’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 44% | 279 |
| 30-min | 0.00% | 45% | 280 |
| 60-min | 0.00% | 50% | 280 |
| to close | -0.47% | 35% | 280 |
| Middle 50% of SEER reactions | -1.24% to +1.22% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 281 |
Half of all Seer, Inc. - Class A news events land between -1.24% and +1.22% 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 SEER moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to SEER's baseline. Nothing else.
Recent SEER events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Seer and Nanyang Technological University to Present Early Findings from Landmark PRECISE-SG100K Proteomics Study at HUPO 2026 | Press release | GlobeNewswire | +0.00% | -3.23% | |
| Seer Announces CFO Transition | Press release | GlobeNewswire | +0.00% | -2.10% | |
| Form 8-K Seer, Inc. For: Sep 14 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.10% | |
| Seer Surpasses 100 Peer-Reviewed Customer Publications, Validating a New Era of Deep Proteomics at Scale | Press release | GlobeNewswire | -0.34% | +0.00% | |
| Radoff-JEC Group Calls on Meeta Gulyani to Immediately Resign from Seer, Inc.’s Board of Directors | Press release | Business Wire | +1.04% | +1.04% | |
| Radoff-JEC Group Calls on Seer, Inc.’s Board of Directors to Publicly Acknowledge That the Company Needs to Be Taken Private and Disclose Timeline for Evaluating Latest Acquisition Offers | Press release | Business Wire | -2.27% | -4.54% | |
| Form 10-Q Seer, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +3.96% | +5.94% | |
| Form 8-K Seer, Inc. For: Aug 11 | SEC filing · Form 8-K | SEC EDGAR | +3.96% | +5.94% | |
| Seer Reports Second Quarter 2026 Financial Results and Reaffirms Full Year 2026 Outlook | Press release | GlobeNewswire | +3.96% | +5.94% | |
| Seer to Participate in the Canaccord Genuity 46th Annual Growth Conference | Press release | GlobeNewswire | +0.91% | +0.46% | |
| Seer to Report Second Quarter 2026 Financial Results on August 11, 2026 | Press release | GlobeNewswire | +0.91% | +0.46% | |
| Form 8-K Seer, Inc. For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | -1.57% | -0.45% | |
| SEER Investors Have Opportunity to Join Seer, Inc. Fraud Investigation with SBS Law | Press release | PR Newswire | -1.57% | -0.45% | |
| Seer Confirms Receipt of Further Revised Unsolicited Acquisition Proposals From Radoff-JEC Group and From Omid Farokhzad, M.D. | Press release | GlobeNewswire | -1.57% | -0.45% | |
| Radoff-JEC Group Submits Further Improved Proposal to Acquire Seer, Inc. | Press release | Business Wire | -4.70% | +1.42% | |
| SEER Investors Have Opportunity to Join Seer, Inc. Fraud Investigation with SBS Law | Press release | Business Wire | +5.53% | +4.52% | |
| Seer Stockholders Vote to Re-Elect All Seven of Seer’s Director Nominees at 2026 Annual Meeting | Press release | GlobeNewswire | +5.53% | +4.52% | |
| Radoff-JEC Group Urges Seer Stockholders to Vote “FOR” All Three of its Independent, Highly Qualified Nominees on the WHITE Proxy Card TODAY | Press release | Business Wire | +0.00% | -4.37% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.48% | -0.97% | |
| Radoff-JEC Group Announces That Glass Lewis Has Joined ISS in Supporting its Case for Change at Seer, Inc. | Press release | Business Wire | +0.24% | -0.96% | |
| Form 8-K Seer, Inc. For: Jul 20 | SEC filing · Form 8-K | SEC EDGAR | -0.24% | +2.94% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.41% | -4.22% | |
| Seer Urges Stockholders to Vote “FOR” Seer’s Highly Qualified Director Nominees on the BLUE Proxy Card TODAY | Press release | GlobeNewswire | -1.41% | -4.22% | |
| Special Committee of Seer’s Board of Directors Unanimously Rejects Unsolicited Acquisition Proposal from Omid Farokhzad, M.D. | Press release | GlobeNewswire | -1.41% | -4.22% | |
| Radoff-JEC Group Announces ISS’ Support of its Case for Change at Seer, Inc. | Press release | Business Wire | +0.00% | +0.93% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | +0.00% | |
| Seer Board of Directors Issues Letter to Shareholders Setting the Record Straight | Press release | GlobeNewswire | +0.00% | +0.00% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.80% | -1.80% | |
| Seer Board of Directors Issues Letter to Shareholders Demonstrating the Strength and Experience of Seer’s Director Nominees | Press release | GlobeNewswire | -1.80% | -1.80% | |
| The Radoff-JEC Group Issues Letter to Fellow Seer, Inc. Stockholders Correcting the Company’s Blatant Rewriting of History | Press release | Business Wire | +0.46% | +0.92% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -1.12% | -2.23% | |
| Seer Files Investor Presentation Highlighting Strong Momentum, Commercial Opportunity and Significant Long-Term Value Creation Potential | Press release | GlobeNewswire | -1.12% | -2.23% | |
| The Radoff-JEC Group Responds to Chairman and CEO Omid Farokhzad, M.D.’s Proposal to Acquire Seer, Inc. | Press release | Business Wire | -1.12% | -2.23% | |
| Form 8-K Seer, Inc. For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | -1.12% | -2.23% | |
| Seer Announces Receipt of Unsolicited Acquisition Proposal from Omid Farokhzad, M.D. | Press release | GlobeNewswire | -1.12% | -2.23% | |
| Seer Prevails in European Patent Opposition as U.S. ITC Opens Investigation into Nanomics | Press release | GlobeNewswire | +0.59% | -2.98% | |
| The Radoff-JEC Group Releases Presentation Highlighting Why Seer, Inc. Stockholders Should Vote for Boardroom Change | Press release | Business Wire | +1.20% | -0.60% | |
| The Radoff-JEC Group Urges Seer, Inc. Stockholders to Vote for Boardroom Change Today | Press release | Business Wire | +0.00% | -1.74% | |
| Seer and Korea University Present Preliminary Data at ASMS 2026 Demonstrating Potential of AI-Driven Plasma Proteomics for Multi-Cancer Screening | Press release | GlobeNewswire | +0.00% | +1.73% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +1.18% | +0.59% | |
| Seer Board of Directors Issues Letter to Shareholders Highlighting the Company’s Significant Scientific Progress and Addressing Radoff and Torok’s Short-Sighted Campaign | Press release | GlobeNewswire | +0.00% | -2.29% | |
| The Radoff-JEC Group Highlights Seer Inc.’s and Chairman and CEO Omid Farokhzad, M.D.’s History of Value Destruction | Press release | Business Wire | +0.00% | -2.29% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -1.16% | |
| Form ARS Seer, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.00% | -0.54% | |
| Form DEFA14A Seer, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -0.54% | |
| Seer Files Definitive Proxy Materials and Mails Letter to Stockholders | Press release | GlobeNewswire | +0.00% | -0.54% | |
| Seer Files ITC Complaint Against Nanomics | Press release | GlobeNewswire | +1.05% | -1.58% | |
| The Radoff-JEC Group Calls on Seer Inc. and Its Advisors to Reevaluate Its Premium Acquisition Proposal in the Best Interests of All Stockholders | Press release | Business Wire | -0.53% | +2.66% | |
| Seer to Showcase AI-Driven Multi-Cancer Screening Approach and Next-Generation Proteomics Capabilities at ASMS 2026 | Press release | GlobeNewswire | -0.27% | +0.53% | |
| Form 8-K Seer, Inc. For: May 21 | SEC filing · Form 8-K | SEC EDGAR | +0.51% | +0.00% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the SEER section they belong to.
Where else SEER is measured.
SEER earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Seer, Inc. - Class A's median reaction calculated?
Every labeled SEER 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 281 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. 45% of SEER'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 SEER'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.