Gilead Sciences insider activity
What the executives and directors of Gilead Sciences actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
−$86M
net open-market flow, 12 m
0 open-market buys, 12 m
99.3%
of sale value on 10b5-1 plans, 12 m
4,245 days since an insider bought, whole record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling.
The 133 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| Sep 10, 2026 | Dickinson Andrew D | 4,144 |
| Sep 10, 2026 | O'Day Daniel Patrick | 13K |
| Sep 10, 2026 | Berger Dietmar | 796 |
| Sep 10, 2026 | Mercier Johanna | 4,144 |
| Sep 10, 2026 | Cain Wettan Keeley M | 875 |
| Aug 26, 2026 | WELTERS ANTHONY | 18K |
| Aug 20, 2026 | Bluestone Jeffrey | 5,000 |
| Aug 17, 2026 | Mercier Johanna | 25K |
| Aug 10, 2026 | Cain Wettan Keeley M | 8,910 |
| Jun 10, 2026 | Dickinson Andrew D | 4,137 |
| Jun 10, 2026 | O'Day Daniel Patrick | 13K |
| Jun 10, 2026 | Berger Dietmar | 796 |
| Jun 10, 2026 | Mercier Johanna | 4,137 |
| Jun 10, 2026 | Cain Wettan Keeley M | 872 |
| May 15, 2026 | Mercier Johanna | 25K |
| Apr 30, 2026 | BARTON JACQUELINE K | 1,146 |
| Apr 30, 2026 | LOVE TED W | 1,146 |
| Apr 30, 2026 | WELTERS ANTHONY | 1,146 |
| Apr 30, 2026 | Rodriguez Javier | 1,146 |
| Apr 30, 2026 | MANWANI HARISH | 1,370 |
| Apr 30, 2026 | Horning Sandra | 1,146 |
| Apr 30, 2026 | Bluestone Jeffrey | 1,146 |
| Mar 10, 2026 | Dickinson Andrew D | 9,616 |
| Mar 10, 2026 | O'Day Daniel Patrick | 30K |
| Mar 10, 2026 | Berger Dietmar | 3,196 |
| Mar 10, 2026 | Mercier Johanna | 9,833 |
| Mar 10, 2026 | Cain Wettan Keeley M | 1,852 |
| Feb 27, 2026 | Dickinson Andrew D | 11K |
| Feb 27, 2026 | O'Day Daniel Patrick | 38K |
| Feb 27, 2026 | Berger Dietmar | 8,530 |
| Feb 27, 2026 | Mercier Johanna | 11K |
| Feb 27, 2026 | Cain Wettan Keeley M | 470 |
| Feb 17, 2026 | Mercier Johanna | 25K |
| Feb 5, 2026 | O'Day Daniel Patrick | 322K |
| Feb 3, 2026 | Dickinson Andrew D | 70K |
| Feb 3, 2026 | Mercier Johanna | 70K |
| Jan 23, 2026 | O'Day Daniel Patrick | 116K |
| Jan 20, 2026 | Bluestone Jeffrey | 5,000 |
| Jan 2, 2026 | Berger Dietmar | 23K |
| Dec 10, 2025 | Dickinson Andrew D | 5,438 |
| Dec 10, 2025 | O'Day Daniel Patrick | 15K |
| Dec 10, 2025 | Mercier Johanna | 5,656 |
| Nov 28, 2025 | Kramer Kelly A. | 5,611 |
| Nov 28, 2025 | Bluestone Jeffrey | 5,000 |
| Nov 17, 2025 | Mercier Johanna | 25K |
| Nov 12, 2025 | Telman Deborah H | 54K |
| Oct 25, 2025 | Telman Deborah H | 756 |
| Sep 10, 2025 | Dickinson Andrew D | 5,447 |
| Sep 10, 2025 | Wilfong Diane E. | 1,259 |
| Sep 10, 2025 | O'Day Daniel Patrick | 15K |
| Sep 10, 2025 | Mercier Johanna | 5,663 |
| Sep 10, 2025 | Telman Deborah H | 1,949 |
| Aug 15, 2025 | Mercier Johanna | 13K |
| Jul 25, 2025 | Telman Deborah H | 13K |
| Jul 14, 2025 | Bluestone Jeffrey | 5,000 |
| Jun 10, 2025 | Dickinson Andrew D | 5,452 |
| Jun 10, 2025 | Wilfong Diane E. | 1,260 |
| Jun 10, 2025 | O'Day Daniel Patrick | 15K |
| Jun 10, 2025 | Mercier Johanna | 5,670 |
| Jun 10, 2025 | Telman Deborah H | 1,743 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| Granted | 299K |
| Vested / exercised | 532K |
| Withheld for tax | 176K |
| Planned sales (10b5-1) | 630K |
| Discretionary sales | 5,000 |
| Kept | 21K |
Who holds what
the 14 largest holdings of 17| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| O'Day Daniel Patrick Chairman & CEO Last trade Sep 1, 2026 | CEO | 586K | – | $51M | net selling over the year: 0 months buying, 12 months selling | Sep 1, 2026 |
| Dickinson Andrew D Chief Financial Officer Last trade Sep 15, 2026 | CFO | 164K | – | $4.7M | net selling over the year: 0 months buying, 12 months selling | Sep 15, 2026 |
| Mercier Johanna Chief Comm & Corp Aff Officer Last trade Sep 15, 2026 | Officer | 118K | – | $19M | net selling over the year: 0 months buying, 12 months selling | Sep 15, 2026 |
| Parsey Merdad Chief Medical Officer Last trade Nov 27, 2024 | Officer | 85K | – | – | Nov 27, 2024 | |
| Telman Deborah H EVP, Corporate Affairs & GC Last trade Nov 12, 2025 | Officer | 61K | – | $6.6M | net selling over the year: 0 months buying, 1 month selling | Nov 12, 2025 |
| Wilfong Diane E. Interim Corp Controller & CAO Last trade Nov 9, 2022 | Officer | 47K | – | – | Nov 9, 2022 | |
| Patterson Sandra SVP, Controllership | Officer | 40K | – | – | – | |
| BARTON JACQUELINE K | Director | 27K | – | – | – | |
| WELTERS ANTHONY Last trade Aug 26, 2026 | Director | 21K | – | $2.7M | net selling over the year: 0 months buying, 1 month selling | Aug 26, 2026 |
| Berger Dietmar Chief Medical Officer | Officer | 20K | – | – | – | |
| MANWANI HARISH | Director | 15K | – | – | – | |
| Rodriguez Javier Last trade Jun 23, 2020 | Director | 13K | – | – | Jun 23, 2020 | |
| Bluestone Jeffrey Last trade Aug 20, 2026 | Director | 11K | – | $2.0M | net selling over the year: 0 months buying, 3 months selling | Aug 20, 2026 |
| Cain Wettan Keeley M EVP Gen Counsel, Legal & Comp | Officer | 9,044 | – | – | – |
Open-market trade log
the 60 most recent of 2,850| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $145.29 +0.0% since trade filed Sep 16, 2026 | Planned sale (10b5-1) | 3,000 | $145.29 | $436K | +0.0% | Sep 16, 2026 |
| Sep 15, 2026 | Mercier Johanna (Officer) 600 shares $145.29 +0.0% since trade filed Sep 16, 2026 | Planned sale (10b5-1) | 600 | $145.29 | $87K | +0.0% | Sep 16, 2026 |
| Sep 15, 2026 | Mercier Johanna (Officer) 800 shares $144.46 +0.6% since trade filed Sep 16, 2026 | Planned sale (10b5-1) | 800 | $144.46 | $116K | +0.6% | Sep 16, 2026 |
| Sep 15, 2026 | Mercier Johanna (Officer) 1,600 shares $143.69 +1.1% since trade filed Sep 16, 2026 | Planned sale (10b5-1) | 1,600 | $143.69 | $230K | +1.1% | Sep 16, 2026 |
| Sep 1, 2026 | O'Day Daniel Patrick (CEO) 1,600 shares $147.51 −1.5% since trade filed Sep 2, 2026 | Planned sale (10b5-1) | 1,600 | $147.51 | $236K | −1.5% | Sep 2, 2026 |
| Sep 1, 2026 | O'Day Daniel Patrick (CEO) 5,408 shares $149.38 −2.7% since trade filed Sep 2, 2026 | Planned sale (10b5-1) | 5,408 | $149.38 | $808K | −2.7% | Sep 2, 2026 |
| Sep 1, 2026 | O'Day Daniel Patrick (CEO) 7,992 shares $148.36 −2.1% since trade filed Sep 2, 2026 | Planned sale (10b5-1) | 7,992 | $148.36 | $1.2M | −2.1% | Sep 2, 2026 |
| Aug 26, 2026 | WELTERS ANTHONY (Director) 3,118 shares $148.31 −2.0% since trade filed Aug 27, 2026 | Planned sale (10b5-1) | 3,118 | $148.31 | $462K | −2.0% | Aug 27, 2026 |
| Aug 26, 2026 | WELTERS ANTHONY (Director) 3,402 shares $148.24 −2.0% since trade filed Aug 27, 2026 | Planned sale (10b5-1) | 3,402 | $148.24 | $504K | −2.0% | Aug 27, 2026 |
| Aug 26, 2026 | WELTERS ANTHONY (Director) 4,600 shares $148.82 −2.4% since trade filed Aug 27, 2026 | Planned sale (10b5-1) | 4,600 | $148.82 | $685K | −2.4% | Aug 27, 2026 |
| Aug 26, 2026 | WELTERS ANTHONY (Director) 6,880 shares $148.82 −2.4% since trade filed Aug 27, 2026 | Planned sale (10b5-1) | 6,880 | $148.82 | $1.0M | −2.4% | Aug 27, 2026 |
| Aug 20, 2026 | Bluestone Jeffrey (Director) 26 shares $146.36 −0.7% since trade filed Aug 21, 2026 | Planned sale (10b5-1) | 26 | $146.36 | $4K | −0.7% | Aug 21, 2026 |
| Aug 20, 2026 | Bluestone Jeffrey (Director) 335 shares $146.26 −0.7% since trade filed Aug 21, 2026 | Planned sale (10b5-1) | 335 | $146.26 | $49K | −0.7% | Aug 21, 2026 |
| Aug 20, 2026 | Bluestone Jeffrey (Director) 1,165 shares $143.75 +1.1% since trade filed Aug 21, 2026 | Planned sale (10b5-1) | 1,165 | $143.75 | $167K | +1.1% | Aug 21, 2026 |
| Aug 20, 2026 | Bluestone Jeffrey (Director) 1,658 shares $145.73 −0.3% since trade filed Aug 21, 2026 | Planned sale (10b5-1) | 1,658 | $145.73 | $242K | −0.3% | Aug 21, 2026 |
| Aug 20, 2026 | Bluestone Jeffrey (Director) 1,816 shares $144.92 +0.3% since trade filed Aug 21, 2026 | Planned sale (10b5-1) | 1,816 | $144.92 | $263K | +0.3% | Aug 21, 2026 |
| Aug 17, 2026 | Dickinson Andrew D (CFO) 3,000 shares $138.36 +5.0% since trade filed Aug 18, 2026 | Planned sale (10b5-1) | 3,000 | $138.36 | $415K | +5.0% | Aug 18, 2026 |
| Aug 17, 2026 | Mercier Johanna (Officer) 11K shares $138.04 +5.3% since trade filed Aug 18, 2026 | Planned sale (10b5-1) | 11K | $138.04 | $1.6M | +5.3% | Aug 18, 2026 |
| Aug 17, 2026 | Mercier Johanna (Officer) 17K shares $137.37 +5.8% since trade filed Aug 18, 2026 | Planned sale (10b5-1) | 17K | $137.37 | $2.3M | +5.8% | Aug 18, 2026 |
| Aug 3, 2026 | O'Day Daniel Patrick (CEO) 600 shares $131.34 +10.6% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 600 | $131.34 | $79K | +10.6% | Aug 4, 2026 |
| Aug 3, 2026 | O'Day Daniel Patrick (CEO) 6,700 shares $129.66 +12.1% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 6,700 | $129.66 | $869K | +12.1% | Aug 4, 2026 |
| Aug 3, 2026 | O'Day Daniel Patrick (CEO) 7,700 shares $130.80 +11.1% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 7,700 | $130.80 | $1.0M | +11.1% | Aug 4, 2026 |
| Jul 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $129.93 +11.8% since trade filed Jul 16, 2026 | Planned sale (10b5-1) | 3,000 | $129.93 | $390K | +11.8% | Jul 16, 2026 |
| Jul 15, 2026 | Mercier Johanna (Officer) 3,000 shares $129.92 +11.8% since trade filed Jul 16, 2026 | Planned sale (10b5-1) | 3,000 | $129.92 | $390K | +11.8% | Jul 16, 2026 |
| Jul 1, 2026 | O'Day Daniel Patrick (CEO) 3,100 shares $127.08 +14.3% since trade filed Jul 2, 2026 | Planned sale (10b5-1) | 3,100 | $127.08 | $394K | +14.3% | Jul 2, 2026 |
| Jul 1, 2026 | O'Day Daniel Patrick (CEO) 12K shares $126.09 +15.2% since trade filed Jul 2, 2026 | Planned sale (10b5-1) | 12K | $126.09 | $1.5M | +15.2% | Jul 2, 2026 |
| Jun 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $125.40 +15.9% since trade filed Jun 16, 2026 | Planned sale (10b5-1) | 3,000 | $125.40 | $376K | +15.9% | Jun 16, 2026 |
| Jun 15, 2026 | Mercier Johanna (Officer) 450 shares $125.40 +15.9% since trade filed Jun 16, 2026 | Planned sale (10b5-1) | 450 | $125.40 | $56K | +15.9% | Jun 16, 2026 |
| Jun 15, 2026 | Mercier Johanna (Officer) 1,070 shares $124.00 +17.2% since trade filed Jun 16, 2026 | Planned sale (10b5-1) | 1,070 | $124.00 | $133K | +17.2% | Jun 16, 2026 |
| Jun 15, 2026 | Mercier Johanna (Officer) 1,480 shares $123.42 +17.7% since trade filed Jun 16, 2026 | Planned sale (10b5-1) | 1,480 | $123.42 | $183K | +17.7% | Jun 16, 2026 |
| Jun 1, 2026 | O'Day Daniel Patrick (CEO) 1,038 shares $132.97 +9.3% since trade filed Jun 2, 2026 | Planned sale (10b5-1) | 1,038 | $132.97 | $138K | +9.3% | Jun 2, 2026 |
| Jun 1, 2026 | O'Day Daniel Patrick (CEO) 3,062 shares $132.22 +9.9% since trade filed Jun 2, 2026 | Planned sale (10b5-1) | 3,062 | $132.22 | $405K | +9.9% | Jun 2, 2026 |
| Jun 1, 2026 | O'Day Daniel Patrick (CEO) 11K shares $131.10 +10.8% since trade filed Jun 2, 2026 | Planned sale (10b5-1) | 11K | $131.10 | $1.4M | +10.8% | Jun 2, 2026 |
| May 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $132.27 +9.8% since trade filed May 18, 2026 | Planned sale (10b5-1) | 3,000 | $132.27 | $397K | +9.8% | May 18, 2026 |
| May 15, 2026 | Mercier Johanna (Officer) 700 shares $132.75 +9.5% since trade filed May 18, 2026 | Planned sale (10b5-1) | 700 | $132.75 | $93K | +9.5% | May 18, 2026 |
| May 15, 2026 | Mercier Johanna (Officer) 7,749 shares $130.29 +11.5% since trade filed May 18, 2026 | Planned sale (10b5-1) | 7,749 | $130.29 | $1.0M | +11.5% | May 18, 2026 |
| May 15, 2026 | Mercier Johanna (Officer) 8,374 shares $132.23 +9.9% since trade filed May 18, 2026 | Planned sale (10b5-1) | 8,374 | $132.23 | $1.1M | +9.9% | May 18, 2026 |
| May 15, 2026 | Mercier Johanna (Officer) 11K shares $131.19 +10.8% since trade filed May 18, 2026 | Planned sale (10b5-1) | 11K | $131.19 | $1.5M | +10.8% | May 18, 2026 |
| Apr 28, 2026 | O'Day Daniel Patrick (CEO) 3,050 shares $130.01 +11.8% since trade filed Apr 29, 2026 | Planned sale (10b5-1) | 3,050 | $130.01 | $397K | +11.8% | Apr 29, 2026 |
| Apr 28, 2026 | O'Day Daniel Patrick (CEO) 6,950 shares $128.79 +12.8% since trade filed Apr 29, 2026 | Planned sale (10b5-1) | 6,950 | $128.79 | $895K | +12.8% | Apr 29, 2026 |
| Apr 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $140.96 +3.1% since trade filed Apr 16, 2026 | Planned sale (10b5-1) | 3,000 | $140.96 | $423K | +3.1% | Apr 16, 2026 |
| Apr 15, 2026 | Mercier Johanna (Officer) 3,000 shares $140.96 +3.1% since trade filed Apr 16, 2026 | Planned sale (10b5-1) | 3,000 | $140.96 | $423K | +3.1% | Apr 16, 2026 |
| Mar 27, 2026 | O'Day Daniel Patrick (CEO) 10K shares $136.82 +6.2% since trade filed Mar 30, 2026 | Planned sale (10b5-1) | 10K | $136.82 | $1.4M | +6.2% | Mar 30, 2026 |
| Mar 16, 2026 | Dickinson Andrew D (CFO) 3,000 shares $144.23 +0.7% since trade filed Mar 17, 2026 | Planned sale (10b5-1) | 3,000 | $144.23 | $433K | +0.7% | Mar 17, 2026 |
| Mar 16, 2026 | Mercier Johanna (Officer) 3,000 shares $144.23 +0.7% since trade filed Mar 17, 2026 | Planned sale (10b5-1) | 3,000 | $144.23 | $433K | +0.7% | Mar 17, 2026 |
| Feb 27, 2026 | O'Day Daniel Patrick (CEO) 100 shares $145.71 −0.3% since trade filed Mar 2, 2026 | Planned sale (10b5-1) | 100 | $145.71 | $15K | −0.3% | Mar 2, 2026 |
| Feb 27, 2026 | O'Day Daniel Patrick (CEO) 3,481 shares $144.04 +0.9% since trade filed Mar 2, 2026 | Planned sale (10b5-1) | 3,481 | $144.04 | $501K | +0.9% | Mar 2, 2026 |
| Feb 27, 2026 | O'Day Daniel Patrick (CEO) 6,419 shares $145.18 +0.1% since trade filed Mar 2, 2026 | Planned sale (10b5-1) | 6,419 | $145.18 | $932K | +0.1% | Mar 2, 2026 |
| Feb 17, 2026 | Dickinson Andrew D (CFO) 3,000 shares $154.43 −5.9% since trade filed Feb 18, 2026 | Planned sale (10b5-1) | 3,000 | $154.43 | $463K | −5.9% | Feb 18, 2026 |
| Feb 17, 2026 | Mercier Johanna (Officer) 200 shares $155.62 −6.6% since trade filed Feb 18, 2026 | Planned sale (10b5-1) | 200 | $155.62 | $31K | −6.6% | Feb 18, 2026 |
| Feb 17, 2026 | Mercier Johanna (Officer) 9,395 shares $154.91 −6.2% since trade filed Feb 18, 2026 | Planned sale (10b5-1) | 9,395 | $154.91 | $1.5M | −6.2% | Feb 18, 2026 |
| Feb 17, 2026 | Mercier Johanna (Officer) 18K shares $154.18 −5.8% since trade filed Feb 18, 2026 | Planned sale (10b5-1) | 18K | $154.18 | $2.8M | −5.8% | Feb 18, 2026 |
| Feb 5, 2026 | O'Day Daniel Patrick (CEO) 116K shares $150.00 −3.1% since trade filed Feb 6, 2026 | Planned sale (10b5-1) | 116K | $150.00 | $17M | −3.1% | Feb 6, 2026 |
| Jan 28, 2026 | O'Day Daniel Patrick (CEO) 4,968 shares $140.24 +3.6% since trade filed Jan 29, 2026 | Planned sale (10b5-1) | 4,968 | $140.24 | $697K | +3.6% | Jan 29, 2026 |
| Jan 28, 2026 | O'Day Daniel Patrick (CEO) 5,032 shares $139.54 +4.1% since trade filed Jan 29, 2026 | Planned sale (10b5-1) | 5,032 | $139.54 | $702K | +4.1% | Jan 29, 2026 |
| Jan 23, 2026 | O'Day Daniel Patrick (CEO) 116K shares $135.00 +7.6% since trade filed Jan 26, 2026 | Planned sale (10b5-1) | 116K | $135.00 | $16M | +7.6% | Jan 26, 2026 |
| Jan 20, 2026 | Bluestone Jeffrey (Director) 5,000 shares $123.50 +17.6% since trade filed Jan 21, 2026 | Planned sale (10b5-1) | 5,000 | $123.50 | $618K | +17.6% | Jan 21, 2026 |
| Jan 15, 2026 | Dickinson Andrew D (CFO) 3,000 shares $124.31 +16.9% since trade filed Jan 16, 2026 | Planned sale (10b5-1) | 3,000 | $124.31 | $373K | +16.9% | Jan 16, 2026 |
| Jan 15, 2026 | Mercier Johanna (Officer) 3,000 shares $124.31 +16.9% since trade filed Jan 16, 2026 | Planned sale (10b5-1) | 3,000 | $124.31 | $373K | +16.9% | Jan 16, 2026 |
| Dec 29, 2025 | O'Day Daniel Patrick (CEO) 10K shares $124.83 +16.4% since trade filed Dec 30, 2025 | Planned sale (10b5-1) | 10K | $124.83 | $1.2M | +16.4% | Dec 30, 2025 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
212 Forms 4, 3 years
1 filed late
0 amendments
2.5 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.