Octave Specialty Group, Inc. (OSG)
OSG moved a median of +0.06% 30 minutes after news, and +0.06% by the close. How OSG actually reacts to news — the realized, point-in-time move the market made, measured across 203 labeled events over the last three years with zero look-ahead.
OSG’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.06% | 54% | 162 |
| 30-min | +0.06% | 54% | 162 |
| 60-min | +0.06% | 52% | 162 |
| to close | +0.06% | 50% | 163 |
| Middle 50% of OSG reactions | -0.12% to +0.18% |
|---|---|
| Median reaction (30-min) | +0.06% |
| Measured reactions | 203 |
Half of all Octave Specialty Group, Inc. news events land between -0.12% and +0.18% 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 OSG moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to OSG's baseline. Nothing else.
Recent OSG events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Pivix Launches Monoline Commercial Property Program | Press release | Business Wire | -0.65% | +3.02% | |
| E&S MGA Pivix Launches Assault & Battery Program | Press release | Business Wire | +0.00% | +0.98% | |
| Octave Specialty Group Appoints Philip Stefano Head of Investor Relations | Press release | Business Wire | +0.00% | +1.43% | |
| Octave Specialty Group Reports Second Quarter 2026 Results | Press release | Business Wire | -1.86% | -3.52% | |
| Everspan Group Expands Leadership Team with Three Senior Appointments | Press release | Business Wire | +1.81% | +2.72% | |
| Octave Specialty Group to Release Second Quarter 2026 Results on August 6, 2026 | Press release | Business Wire | +1.57% | +0.82% | |
| Octave Specialty Group Reports First Quarter 2026 Results | Press release | Business Wire | +1.43% | +8.42% | |
| Octave Specialty Group to Release First Quarter 2026 Results on May 6, 2026 | Press release | Business Wire | -2.40% | -5.52% | |
| Octave Specialty Group Announces Meeting and Record Date for 2026 Annual Meeting of Stockholders | Press release | Business Wire | -1.23% | +0.20% | |
| Octave Specialty Group Reports Fourth Quarter 2025 Results | Press release | Business Wire | -5.41% | -8.29% | |
| Hammurabi, a Division of Xchange Benefits, Unveils AI Platform That Revolutionizes Medical Stop Loss Underwriting | Press release | Business Wire | +0.70% | +1.05% | |
| Everspan Group Announces Strategic Leadership Changes | Press release | Business Wire | +1.47% | -1.79% | |
| Octave Specialty Group to Release Fourth Quarter 2025 Results on February 23, 2026 | Press release | Business Wire | -0.74% | -1.15% | |
| Octave Specialty Announces Auditor Change | Press release | Business Wire | +1.44% | -1.99% | |
| Form 8-K OVERSEAS SHIPHOLDING For: Jul 10 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form S-8 POS OVERSEAS SHIPHOLDING | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Saltchuk Welcomes Overseas Shipholding Group to Its Family of Companies | Press release | Business Wire | — | — | |
| Saltchuk Resources, Inc. and Overseas Shipholding Group, Inc. Announce Expiration of Hart-Scott-Rodino Waiting Period for Tender Offer | Press release | Business Wire | +0.00% | +0.06% | |
| OSG Stock Alert: Halper Sadeh LLC is Investigating Whether the Sale of Overseas Shipholding Group, Inc. is Fair to Shareholders | Press release | GlobeNewswire | +0.00% | +0.06% | |
| Saltchuk Resources, Inc. and Overseas Shipholding Group, Inc. Announce Commencement of Tender Offer for All Issued and Outstanding Shares of Overseas Shipholding Group, Inc. (NYSE:OSG) | Press release | PR Newswire | +0.06% | +0.00% | |
| Form 8-K OVERSEAS SHIPHOLDING For: May 29 | SEC filing · Form 8-K | SEC EDGAR | +0.06% | -0.12% | |
| Overseas Shipholding Group Announces Cancellation of Annual Meeting of Stockholders | Press release | Business Wire | +0.06% | -0.12% | |
| Overseas Shipholding Group Announces the Release of its Sustainability Report | Press release | Business Wire | -0.06% | -0.12% | |
| Lifshitz Law PLLC Announces Investigations of OSG, SSB, AGR, and SBOW | Press release | Accesswire | +0.12% | +0.24% | |
| Form 8-K OVERSEAS SHIPHOLDING For: May 19 | SEC filing · Form 8-K | SEC EDGAR | -0.58% | -0.24% | |
| OSG STOCK ALERT: Halper Sadeh LLC Is Investigating Whether the Sale of Overseas Shipholding Group, Inc. Is Fair to Shareholders | Press release | Business Wire | -0.58% | -0.24% | |
| Overseas Shipholding Group Enters Into a Definitive Agreement to Be Acquired by Saltchuk Resources, Inc. | Press release | Business Wire | -0.58% | -0.24% | |
| Form 10-Q OVERSEAS SHIPHOLDING For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -0.44% | |
| Form 8-K OVERSEAS SHIPHOLDING For: May 10 | SEC filing · Form 8-K | SEC EDGAR | +0.15% | -2.04% | |
| Overseas Shipholding Group Reports First Quarter 2024 Results | Press release | Business Wire | +0.15% | -2.04% | |
| Overseas Shipholding Group to Announce First Quarter 2024 Results on May 10, 2024 | Press release | Business Wire | +0.00% | +0.08% | |
| Form DEF 14A OVERSEAS SHIPHOLDING For: Jun 06 | SEC filing · Form DEF | SEC EDGAR | +0.00% | -0.33% | |
| Form DEFA14A OVERSEAS SHIPHOLDING | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -0.33% | |
| Overseas Shipholding Group Awarded Federal Grant to Design Marine Transport For Liquified CO2 Captured by Florida’s Largest Emitters | Press release | Business Wire | -0.49% | +0.99% | |
| Form PRE 14A OVERSEAS SHIPHOLDING For: Jun 06 | SEC filing · Form PRE | SEC EDGAR | +0.17% | +0.17% | |
| Form 8-K OVERSEAS SHIPHOLDING For: Apr 03 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | -2.58% | |
| Overseas Shipholding Group Awards $30,500 in Scholarships with Women Offshore | Press release | Business Wire | -0.16% | +0.00% | |
| Form 10-K/A OVERSEAS SHIPHOLDING For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.16% | -2.36% | |
| Form 8-K OVERSEAS SHIPHOLDING For: Mar 14 | SEC filing · Form 8-K | SEC EDGAR | +2.17% | +2.00% | |
| Overseas Shipholding Group Declares Dividend | Press release | Business Wire | +2.17% | +2.00% | |
| Form 10-K OVERSEAS SHIPHOLDING For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -1.05% | -2.91% | |
| Form 8-K OVERSEAS SHIPHOLDING For: Mar 11 | SEC filing · Form 8-K | SEC EDGAR | -1.00% | +4.02% | |
| Overseas Shipholding Group Reports Fourth Quarter and Full Year 2023 Results | Press release | Business Wire | -1.00% | +4.02% | |
| Overseas Shipholding Group to Announce Fourth Quarter and Full Year 2023 Results on March 11, 2024 | Press release | Business Wire | +0.16% | -1.46% | |
| Form 8-K OVERSEAS SHIPHOLDING For: Jan 26 | SEC filing · Form 8-K | SEC EDGAR | +1.10% | -3.31% | |
| Overseas Shipholding Group Confirms Receipt of Unsolicited Indication of Interest | Press release | Business Wire | -1.64% | +5.41% | |
| Overseas Shipholding Group Pledges $90,000 to Massachusetts Maritime Academy Foundation | Press release | Business Wire | +0.03% | +0.88% | |
| Overseas Shipholding Group Awarded Federal Grant to Develop Captured Carbon Terminal at Port Tampa Bay | Press release | Business Wire | +0.19% | -0.19% | |
| Overseas Shipholding Group Installs Starlink Satellite Internet Service on Entire Fleet | Press release | Business Wire | +0.69% | +3.54% | |
| Overseas Shipholding Group, Inc. to Upgrade Engines on Alaskan Class Vessels | Press release | Business Wire | +0.72% | +1.38% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the OSG section they belong to.
Where else OSG is measured.
OSG earnings → · Analyst actions → · SEC filings →
Other Industrials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Healthcare Services Group, Inc. (HCSG) | 204 | -0.02% | 41% |
| Lindsay Corporation (LNN) | 203 | +0.24% | 65% |
| SODEXO S/ADR (SDXAY) | 203 | 0.00% | 28% |
| Twin Disc, Incorporated (TWIN) | 203 | -0.01% | 41% |
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.
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How the numbers are made.
How is Octave Specialty Group, Inc.'s median reaction calculated?
Every labeled OSG 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 203 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. 54% of OSG'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 OSG'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.