Summary
Updated Aug 31, 2026
GILEAD SCIENCES, INC. is 10% Owner of ASSEMBLY BIOSCIENCES, INC. (ASMB). 6 SEC Form 4 filings on record going back to 2024, most recently on 28 May 2026. Most recent open-market trade: bought $20.10M of ASMB on 24 December 2024. Lifetime open-market purchases: $30.26M. Historical track record: 3/5 stars across 4 tracked purchases.
Recent Transactions
4Every recent SEC Form 4 transaction GILEAD SCIENCES, INC. has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★☆☆ (3/5) |
| Total purchases tracked | 4 |
| Purchases with forward-return data | 4 |
| 30-day win rate | 50% |
| 90-day win rate | 25% |
| Avg 5-day return | +11.92% |
| Avg 30-day return | +11.97% |
| Avg 90-day return | -11.01% |
| Best 30-day return | +31.56% |
Trading Pattern
InsiderAlpha's records for GILEAD SCIENCES, INC. go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $4.32M (7 buys totaling $30.26M). The largest single buy on record is $20.10M of ASMB in 2024. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies GILEAD SCIENCES, INC. files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- James Samuel Shannon - $44K of XLO open-market activity in the last 12 months
- Jeanette M. Bjorkquist - $9K of ASMB open-market activity in the last 12 months
- Nicole S. White - $5K of ASMB open-market activity in the last 12 months
- Christopher James Frankenfield - $5K of XLO open-market activity in the last 12 months
- Kevin M. Brennan - $1K of XLO open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
What is GILEAD SCIENCES, INC.?
GILEAD SCIENCES, INC. is a corporate entity, tracked as 10% Owner of ASSEMBLY BIOSCIENCES, INC. (ASMB). InsiderAlpha holds 6 primary Form 4 filings for it, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did GILEAD SCIENCES, INC. last file a Form 4?
The most recent primary Form 4 on record is dated 28 May 2026, one of 6 filings going back to 2024.
Has GILEAD SCIENCES, INC. been buying or selling stock?
Recorded transactions: 7 open-market purchases ($30.26M) and 0 open-market sales across all tracked filings.
How accurate is GILEAD SCIENCES, INC.'s historical track record?
Across 4 tracked purchases, GILEAD SCIENCES, INC. averaged +12.0% avg 30-day return with a 50% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of GILEAD SCIENCES, INC.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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