EFFECT ·Filed Mar 19, 2026
IPO/offering going effective
Actionable Insight • Neutral
Monitor for upcoming prospectus supplements that will disclose specific terms of any offering. Shelf effectiveness often precedes an offering by weeks or months, so watch for insider trading patterns or news that could trigger a capital raise.
Final — all horizons settled through T+60d
GOSS ▼ -63.05% at T+60d
NEUTRAL call -63.05% · α vs SPY -77.40% · entry $0.4520 → $0.1670
T+1d
-6.64%
call -6.64% · α -4.90%
$0.4220
settled 7mo ago
T+5d
-17.04%
call -17.04% · α -14.82%
$0.3750
settled 7mo ago
T+20d
-1.33%
call -1.33% · α -8.95%
$0.4460
settled 6mo ago
T+60d
-63.05%
call -63.05% · α -77.40%
$0.1670
settled 4mo ago
Price Chart
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Executive Summary
Gossamer Bio's shelf registration statement (Form S-3) has become effective, allowing the company to issue unspecified securities from time to time. This creates potential for future dilution but no immediate financial impact.
Key Facts
- SEC Form EFFECT indicates effectiveness of a prior registration statement (File No. 333-293009).
- This is a shelf registration (implied by File No. 333-293009, a Form S-3), enabling future offerings of unspecified size and type.
- Effectiveness date: March 18, 2026.
- No details on offering size, pricing, or timing are included in this notice.
Financial Impact
Potential future dilution; exact magnitude unknown
dilutionequity
Risk Factors
- Future equity issuance could dilute existing shareholders.
- Offering may occur at an inopportune time or price, negatively impacting stock performance.
Market Snapshot
Exchange
Nasdaq
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| EFFECT Filing (Primary) | 9999999995-26-000860 |
| Document: 9999999995-26-000860-index.html | 9999999995-26-000860 |
| Document: 9999999995-26-000860.txt | 9999999995-26-000860 |
15 reports for GOSS
80% Hit rate @ T+20 Went positive at some point 6 of 6 best @ T+60▲ +25.28%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 8, 2026 18d ago | SC 13D/A | $9.31 | awaiting T+20 | — | $9.77 (−4.94%) |
Sep 28, 2026 28d ago | SC 13D/A | $11.58 $9.77 | ▲ +15.63% | ▲ +16.34% | $9.77 (+15.63%) |
Sep 22, 2026 5w ago | Institutional Cluster | $11.69 $9.58 | ▼ −18.05% | ▼ −17.49% | $9.77 (−16.42%) |
Sep 16, 2026 5w ago | 8-K | $11.94 $8.89 | ▼ −25.54% | ▼ −26.75% | $9.77 (−18.17%) |
Sep 11, 2026 6w ago | 8-K | $10.73 $9.31 | ▲ +13.23% | ▲ +15.10% | $9.77 (+8.95%) |
Sep 9, 2026 6w ago | 8-K | $0.1597 $0.1273 | ▼ −20.32% | ▼ −22.26% | $9.77 (+6017.72%) |
Aug 21, 2026 9w ago | 8-K | $0.1547 $0.1410 | ▲ +8.86% | ▲ +9.87% | $9.77 (−6215.45%) |
Aug 13, 2026 10w ago | 8-K | $0.1542 $0.1337 | ▼ −13.26% | ▼ −11.27% | $9.77 (+6235.93%) |
Jul 1, 2026 16w ago | 8-K | $0.1677 $0.1783 | ▼ −6.32% | ▼ −6.87% | $9.77 (−5725.88%) |
Jun 17, 2026 18w ago | 8-K | $0.1790 $0.1701 | ▲ +4.97% | ▲ +5.29% | $9.77 (−5358.10%) |
Showing 10 of 15
US Market Status
Market Closed — Opens Wed (< 1m)
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