← United States · Coverage record
US · SEC FORM 4
Gossamer Bio, Inc.
GOSS · Nasdaq · CIK 0001728117 · Healthcare · Biotechnology
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
0 Form 4 transaction lines observed in the same window
0 sales · 0 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
No Form 4 transaction event is present in the current 180-day window.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-19 · Milligan Sandra.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 1,237,721
- Previous report
- 948,623
- Avg daily volume
- 353,408
- Days to cover
- 3.5
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-08-19 | Milligan Sandra | Purchase (P) | Common Stock | 26,050 | USD 1.92 | USD 50,016 | SEC filing ↗ |
| 2024-06-21 | Hasnain Faheem | Purchase (P) | Common Stock | 372,000 | USD 0.67 | USD 249,240 | SEC filing ↗ |
| 2024-06-18 | Giraudo Bryan | Purchase (P) | Common Stock | 100,000 | USD 0.59 | USD 59,000 | SEC filing ↗ |
| 2024-06-17 | Smith Robert Paul JR | Purchase (P) | Common Stock | 25,000 | USD 0.60 | USD 15,000 | SEC filing ↗ |
| 2023-11-15 | Milligan Sandra | Purchase (P) | Common Stock | 32,000 | USD 0.79 | USD 25,280 | SEC filing ↗ |
| 2023-11-13 | Giraudo Bryan | Purchase (P) | Common Stock | 200,000 | USD 0.56 | USD 112,000 | SEC filing ↗ |
| 2023-04-04 | Giraudo Bryan | Purchase (P) | Common Stock | 55,000 | USD 1.02 | USD 56,100 | SEC filing ↗ |
| 2023-03-22 | Hasnain Faheem | Purchase (P) | Common Stock | 440,500 | USD 1.14 | USD 502,170 | SEC filing ↗ |
| 2023-03-21 | Hasnain Faheem | Purchase (P) | Common Stock | 269,389 | USD 1.20 | USD 323,267 | SEC filing ↗ |
| 2023-03-20 | Hasnain Faheem | Purchase (P) | Common Stock | 168,683 | USD 1.03 | USD 173,743 | SEC filing ↗ |
| 2023-03-20 | Giraudo Bryan | Purchase (P) | Common Stock | 50,000 | USD 0.97 | USD 48,500 | SEC filing ↗ |
| 2023-03-20 | Christian Waage | Purchase (P) | Common Stock | 18,500 | USD 1.20 | USD 22,200 | SEC filing ↗ |
| 2022-07-15 | Hasnain Faheem | Purchase (P) | Common Stock | 138,696 | USD 7.21 | USD 999,998 | SEC filing ↗ |
| 2022-07-15 | Giraudo Bryan | Purchase (P) | Common Stock | 13,869 | USD 7.21 | USD 99,995 | SEC filing ↗ |
| 2022-07-15 | Christian Waage | Purchase (P) | Common Stock | 6,934 | USD 7.21 | USD 49,994 | SEC filing ↗ |
Form 4 evidence
6 transaction lines in the latest 365-day window; 77 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-01-02 | Smith Robert Paul JR | Award / grant (A) | Common Stock | 93,750 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Peterson Caryn | Award / grant (A) | Common Stock | 84,500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Hasnain Faheem | Award / grant (A) | Common Stock | 280,000 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (6 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-01-02 | Smith Robert Paul JR | Award / grant (A) | Common Stock | 93,750 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Peterson Caryn | Award / grant (A) | Common Stock | 84,500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Hasnain Faheem | Award / grant (A) | Common Stock | 280,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Giraudo Bryan | Award / grant (A) | Common Stock | 115,750 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Christian Waage | Award / grant (A) | Common Stock | 84,500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-02 | Aranda Richard | Award / grant (A) | Common Stock | 93,750 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | GOSS |
| CIK | 0001728117 |
| Sector | Healthcare |
| Industry | Biotechnology Yahoo Finance |
| SEC SIC | 2834 Pharmaceutical Preparations |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 77 transaction lines from 2020-02-14 to 2026-01-02 20 P purchase lines · 29 S sale lines · 28 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.