STAAR Surgical Company (STAA)
STAA moved a median of -0.21% 30 minutes after news, and -0.02% by the close. How STAA actually reacts to news — the realized, point-in-time move the market made, measured across 522 labeled events over the last three years with zero look-ahead.
STAA’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.08% | 42% | 521 |
| 30-min | -0.21% | 44% | 521 |
| 60-min | +0.03% | 51% | 521 |
| to close | -0.02% | 49% | 519 |
| Middle 50% of STAA reactions | -1.17% to +0.75% |
|---|---|
| Median reaction (30-min) | -0.21% |
| Measured reactions | 522 |
Half of all STAAR Surgical Company news events land between -1.17% and +0.75% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How STAA reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 22 | +0.05% | 50% | +0.52% |
| Analyst downgrades | 27 | +0.94% | 74% | +0.93% |
| Coverage initiations | 14 | -0.11% | 43% | +1.16% |
| Rating reiterations | 83 | -0.26% | 40% | +0.19% |
| Price-target raises | 11 | -0.18% | 46% | +0.22% |
| Price-target cuts | 18 | -0.25% | 39% | -0.54% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. See how STAA ranks against every other measured name →
That’s how STAA usually reacts — get an email when it moves on news →Email me when STAA moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to STAA's baseline. Nothing else.
Recent STAA events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| STAAR Surgical Names Andrew Pilon as Vice President of Business Development | Press release | Business Wire | +0.07% | +0.95% | |
| Form 8-K/A STAAR SURGICAL CO For: Sep 08 | SEC filing · Form 8-K | SEC EDGAR | +0.41% | +2.01% | |
| STAAR Surgical Board Approves $50 Million Share Repurchase Authorization | Press release | Business Wire | -0.45% | +1.48% | |
| Form 8-K STAAR SURGICAL CO For: Sep 09 | SEC filing · Form 8-K | SEC EDGAR | -0.69% | +0.26% | |
| STAAR Surgical Releases Landmark Global Report Showing Structural Multi-Market Shift Toward Lens-Based Vision Correction | Press release | Business Wire | -0.69% | +0.26% | |
| STAAR Surgical Names Former CEO David Bailey as Chief Commercial Officer | Press release | Business Wire | -1.03% | -2.44% | |
| STAAR Surgical Names Medtech Innovator and Platform Builder Ben Park as Chief Technology Officer | Press release | Business Wire | +0.52% | +1.84% | |
| Form 10-Q STAAR SURGICAL CO For: Jul 03 | SEC filing · Form 10-Q | SEC EDGAR | +1.67% | +5.54% | |
| Form 8-K STAAR SURGICAL CO For: Aug 12 | SEC filing · Form 8-K | SEC EDGAR | +1.67% | +5.54% | |
| STAAR Surgical Reports Second Quarter 2026 Results | Press release | Business Wire | +1.67% | +5.54% | |
| Form 8-K STAAR SURGICAL CO For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | +0.35% | +1.00% | |
| STAAR Surgical Appoints Warren Foust as President and Chief Executive Officer | Press release | Business Wire | -3.17% | -3.87% | |
| STAAR Surgical to Host Second Quarter 2026 Earnings Results Call and Webcast on August 12, 2026 | Press release | Business Wire | -3.17% | -3.87% | |
| STAAR Surgical Announces Preliminary Net Sales for Second Quarter 2026 | Press release | Business Wire | -5.06% | -3.15% | |
| Form S-8 STAAR SURGICAL CO | SEC filing · Form S-8 | SEC EDGAR | -0.24% | +0.21% | |
| Form 8-K STAAR SURGICAL CO For: Jun 18 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | -1.94% | |
| Form 8-K STAAR SURGICAL CO For: Jun 09 | SEC filing · Form 8-K | SEC EDGAR | -0.60% | -1.74% | |
| STAAR Surgical Announces Participation in Upcoming Investor Conferences | Press release | Business Wire | +0.72% | -0.76% | |
| Form 10-Q STAAR SURGICAL CO For: Apr 03 | SEC filing · Form 10-Q | SEC EDGAR | -5.28% | -10.66% | |
| Form 8-K STAAR SURGICAL CO For: May 12 | SEC filing · Form 8-K | SEC EDGAR | -5.28% | -10.66% | |
| STAAR Surgical Reports First Quarter 2026 Results; Issues Shareholder Letter | Press release | Business Wire | -5.28% | -10.66% | |
| Form ARS STAAR SURGICAL CO For: Jan 02 | SEC filing · Form ARS | SEC EDGAR | -0.20% | +0.44% | |
| Form DEF 14A STAAR SURGICAL CO For: May 01 | SEC filing · Form DEF | SEC EDGAR | -0.20% | +0.44% | |
| Form DEFA14A STAAR SURGICAL CO | SEC filing · Form DEFA14A | SEC EDGAR | -0.20% | +0.44% | |
| STAAR Surgical to Host First Quarter 2026 Earnings Results Call and Webcast on May 13, 2026 | Press release | Business Wire | -0.20% | +0.44% | |
| Form 8-K STAAR SURGICAL CO For: Apr 08 | SEC filing · Form 8-K | SEC EDGAR | -2.03% | +1.45% | |
| STAAR Surgical Announces Preliminary Net Sales for First Quarter 2026 | Press release | Business Wire | -2.03% | +1.45% | |
| Form 10-K STAAR SURGICAL CO For: Jan 02 | SEC filing · Form 10-K | SEC EDGAR | +0.21% | +0.21% | |
| Form 8-K STAAR SURGICAL CO For: Mar 03 | SEC filing · Form 8-K | SEC EDGAR | +3.48% | +8.77% | |
| STAAR Surgical Issues Shareholder Letter | Press release | Business Wire | +3.48% | +8.77% | |
| STAAR Surgical Reports Fourth Quarter and Fiscal Year 2025 Results | Press release | Business Wire | +3.48% | +8.77% | |
| STAAR Surgical Surpasses 4 Million ICLs Sold Globally, Reflecting Ongoing Shift Away from Laser-Based Vision Correction | Press release | Business Wire | -0.25% | +1.35% | |
| STAAR Surgical to Host Fourth Quarter and Fiscal Year 2025 Earnings Conference Call and Webcast on March 3, 2026 | Press release | Business Wire | -0.76% | +7.63% | |
| FDA Expands U.S. Age Indication for EVO ICL as Long-Term Safety Data Reinforces Market Shift Away From Laser Vision Correction | Press release | Business Wire | +1.78% | +7.60% | |
| Form 8-K STAAR SURGICAL CO For: Feb 05 | SEC filing · Form 8-K | SEC EDGAR | -0.06% | -2.90% | |
| Form 8-K STAAR SURGICAL CO For: Feb 01 | SEC filing · Form 8-K | SEC EDGAR | -0.32% | -4.14% | |
| STAAR Surgical Appoints Warren Foust and Deborah Andrews Interim Co-CEOs | Press release | Business Wire | -0.32% | -4.14% | |
| Form 8-K STAAR SURGICAL CO For: Jan 15 | SEC filing · Form 8-K | SEC EDGAR | -0.61% | +2.14% | |
| Form 8-K STAAR SURGICAL CO For: Jan 14 | SEC filing · Form 8-K | SEC EDGAR | -0.37% | -2.74% | |
| STAAR Surgical and Broadwood Partners Enter Into Cooperation Agreement | Press release | Business Wire | -0.37% | -2.74% | |
| Broadwood Partners Comments on STAAR Surgical Shareholders’ Rejection of the Company’s Proposed Sale to Alcon | Press release | Business Wire | +0.14% | +6.53% | |
| Form 8-K STAAR SURGICAL CO For: Jan 06 | SEC filing · Form 8-K | SEC EDGAR | +3.55% | +11.43% | |
| STAAR Surgical Announces Preliminary Results of Special Meeting of Stockholders | Press release | Business Wire | +3.55% | +11.43% | |
| Alcon Exercises Right to Require STAAR Surgical to Adjourn its Special Meeting of Stockholders | Press release | Business Wire | +0.00% | +1.11% | |
| Broadwood Partners Denounces STAAR Surgical’s Fourth Delay of the Shareholder Vote on the Company’s Proposed Sale to Alcon | Press release | Business Wire | +0.63% | -0.32% | |
| Form DEFA14A STAAR SURGICAL CO | SEC filing · Form DEFA14A | SEC EDGAR | -0.26% | -0.22% | |
| Broadwood Partners Issues Open Letter to STAAR Surgical Board Pledging Cooperation and Support When Vote on Alcon Transaction Fails | Press release | Business Wire | +0.02% | +1.11% | |
| Defender Capital Reiterates Intention to Vote AGAINST STAAR Surgical's Proposed Sale to Alcon Inc. | Press release | PR Newswire | -1.09% | -8.22% | |
| Form DEFA14A STAAR SURGICAL CO | SEC filing · Form DEFA14A | SEC EDGAR | -0.16% | +0.80% | |
| STAAR Stockholders Have a Choice: Vote FOR Alcon’s Certain, Premium $30.75 Per Share Cash Offer or Bear the Downside Risk that Broadwood Has No Credible Plan to Create Stockholder Value | Press release | Business Wire | -0.45% | +2.31% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the STAA section they belong to.
Where else STAA is measured.
STAA earnings → · Analyst actions → · SEC filings →
Other Healthcare names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Quest Diagnostics Incorporated (DGX) | 524 | +0.03% | 51% |
| Tonix Pharmaceuticals Holding Corp. (TNXP) | 524 | -0.32% | 46% |
| Surface Oncology, Inc. (SURF) | 521 | -0.69% | 36% |
| MAZOR ROBOTICS LTD AMERICAN D (MZOR) | 518 | -0.08% | 43% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Healthcare names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is STAAR Surgical Company's median reaction calculated?
Every labeled STAA 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 522 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. 44% of STAA'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 STAA'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.