Ian T Clark insider trades: Guardant Health (GH) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Ian reports to the SEC
and 8 more companies
Open-market buys and sales
64 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 4, 2026 | GH | ↓ Sell | 14,180 | $158.92 | $2.3M | By The Thornton-Clark Family Trust, J Th | Aug 5, 2026 (1d) |
| May 20, 2026 | GH | ↓ Sell | 6,876 | $106.90 | $735K | By The Thornton-Clark Family Trust, J Th | May 22, 2026 (2d) |
| Dec 19, 2025 | OLMA | ↓ Sell | 264,800 | $29.73 | $7.9M | Direct | Dec 23, 2025 (4d) |
| Dec 5, 2025 | GH | ↓ Sell | 28,611 | $107.19 | $3.1M | By The Thornton-Clark Family Trust, J Th | Dec 8, 2025 (3d) |
| Jun 17, 2025 | GH | ↓ Sell | 6,672 | $48.38 | $323K | By The Thornton-Clark Family Trust, J Th | Jun 20, 2025 (3d) |
| Nov 12, 2024 | GH | ↓ Sell | 8,318 | $29.45 | $245K | Direct | Nov 14, 2024 (2d) |
| Sep 1, 2021 | GH | ↓ Sell10b5-1 | 1,076 | $130.00 | $140K | Direct | Sep 3, 2021 (2d) |
| Jun 29, 2021 | GH | ↓ Sell10b5-1 | 10,559 | $130.00 | $1.4M | Direct | Jul 1, 2021 (2d) |
| Apr 26, 2021 | GH | ↓ Sell10b5-1 | 538 | $159.92 | $86K | Direct | Apr 28, 2021 (2d) |
| Mar 25, 2021 | GH | ↓ Sell10b5-1 | 538 | $132.09 | $71K | Direct | Mar 29, 2021 (4d) |
| Feb 25, 2021 | GH | ↓ Sell10b5-1 | 538 | $154.00 | $83K | Direct | Mar 1, 2021 (4d) |
| Jan 25, 2021 | GH | ↓ Sell10b5-1 | 538 | $162.00 | $87K | Direct | Jan 27, 2021 (2d) |
| Jan 4, 2021 | GH | ↓ Sell10b5-1 | 2,690 | $129.23 | $348K | Direct | Jan 6, 2021 (2d) |
| Dec 28, 2020 | GH | ↓ Sell10b5-1 | 538 | $135.00 | $73K | Direct | Dec 30, 2020 (2d) |
| Dec 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $120.00 | $323K | Direct | Dec 7, 2020 (4d) |
| Nov 25, 2020 | GH | ↓ Sell10b5-1 | 538 | $113.28 | $61K | Direct | Nov 27, 2020 (2d) |
| Nov 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $105.28 | $283K | Direct | Nov 5, 2020 (2d) |
| Oct 26, 2020 | GH | ↓ Sell10b5-1 | 538 | $104.03 | $56K | Direct | Oct 28, 2020 (2d) |
| Oct 5, 2020 | GH | ↓ Sell10b5-1 | 3,228 | $108.12 | $349K | Direct | Oct 5, 2020 (0d) |
| Sep 8, 2020 | GH | ↓ Sell10b5-1 | 9,146 | $89.25 | $816K | Direct | Sep 10, 2020 (2d) |
| Jun 25, 2020 | GH | ↓ Sell10b5-1 | 538 | $81.27 | $44K | Direct | Jun 29, 2020 (4d) |
| Jun 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $87.52 | $235K | Direct | Jun 5, 2020 (2d) |
| May 26, 2020 | GH | ↓ Sell10b5-1 | 538 | $98.50 | $53K | Direct | May 26, 2020 (0d) |
| May 4, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $72.17 | $194K | Direct | May 6, 2020 (2d) |
| Apr 27, 2020 | GH | ↓ Sell10b5-1 | 538 | $77.50 | $42K | Direct | Apr 29, 2020 (2d) |
| Apr 14, 2020 | GH | ↓ Sell10b5-1 | 2,689 | $70.00 | $188K | Direct | Apr 16, 2020 (2d) |
| Mar 25, 2020 | GH | ↓ Sell10b5-1 | 538 | $70.00 | $38K | Direct | Mar 27, 2020 (2d) |
| Mar 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $78.33 | $211K | Direct | Mar 4, 2020 (1d) |
| Feb 25, 2020 | GH | ↓ Sell10b5-1 | 538 | $80.00 | $43K | Direct | Feb 27, 2020 (2d) |
| Feb 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $76.23 | $205K | Direct | Feb 5, 2020 (2d) |
| Jan 27, 2020 | GH | ↓ Sell10b5-1 | 538 | $77.31 | $42K | Direct | Jan 29, 2020 (2d) |
| Jan 3, 2020 | GH | ↓ Sell10b5-1 | 2,690 | $77.87 | $209K | Direct | Jan 7, 2020 (4d) |
| Dec 26, 2019 | GH | ↓ Sell10b5-1 | 538 | $82.69 | $44K | Direct | Dec 30, 2019 (4d) |
| Dec 3, 2019 | GH | ↓ Sell10b5-1 | 2,690 | $72.78 | $196K | Direct | Dec 5, 2019 (2d) |
| Nov 25, 2019 | GH | ↓ Sell10b5-1 | 538 | $78.17 | $42K | Direct | Nov 27, 2019 (2d) |
| Nov 4, 2019 | GH | ↓ Sell10b5-1 | 2,690 | $71.82 | $193K | Direct | Nov 6, 2019 (2d) |
| Oct 28, 2019 | GH | ↓ Sell10b5-1 | 3,228 | $70.00 | $226K | Direct | Oct 29, 2019 (1d) |
| Sep 25, 2019 | GH | ↓ Sell10b5-1 | 538 | $72.00 | $39K | Direct | Sep 27, 2019 (2d) |
| Sep 3, 2019 | GH | ↓ Sell10b5-1 | 2,690 | $85.70 | $231K | Direct | Sep 5, 2019 (2d) |
| Aug 26, 2019 | GH | ↓ Sell10b5-1 | 538 | $94.05 | $51K | Direct | Aug 28, 2019 (2d) |
| Aug 6, 2019 | GH | ↓ Sell10b5-1 | 9,683 | $89.75 | $869K | Direct | Aug 8, 2019 (2d) |
| May 3, 2019 | GH | ↓ Sell10b5-1 | 2,690 | $65.91 | $177K | Direct | May 3, 2019 (0d) |
| Apr 25, 2019 | GH | ↓ Sell10b5-1 | 538 | $65.11 | $35K | Direct | Apr 29, 2019 (4d) |
| Apr 15, 2019 | GH | ↓ Sell10b5-1 | 81,772 | $73.90 | $6.0M | Direct | Apr 17, 2019 (2d) |
| Jun 2, 2011 | SZYM | ↑ Buy | 3,000 | $18.00 | $54K | Direct | Jun 3, 2011 (1d) |
| Aug 20, 2010 | DNDN | ↓ Sell | 7,500 | $37.46 | $281K | Direct | Aug 23, 2010 (3d) |
| May 3, 2010 | DNDN | ↓ Sell | 8,744 | $54.61 | $478K | Direct | May 6, 2010 (3d) |
| Jul 16, 2008 | DNA | ↓ Sell | 32,217 | $80.35 | $2.6M | Direct | Jul 18, 2008 (2d) |
| Jul 16, 2008 | DNA | ↓ Sell | 19,712 | $79.79 | $1.6M | Direct | Jul 18, 2008 (2d) |
| Jul 16, 2008 | DNA | ↓ Sell | 17,056 | $80.00 | $1.4M | Direct | Jul 18, 2008 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other GH insiders
Open-market trades in the last 12 months
About Ian T Clark's insider trades
Ian T Clark is a director at Guardant Health (GH). Since Aug 19, 2005, Ian has reported 1 open-market purchase worth $54K and 63 sales worth $45.2M on SEC Form 4. In the last 12 months: 4 sales ($13.9M).
38 sales (31% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include option exercises (72 filings), grants and awards (65 filings), shares returned to the company (3 filings), other transactions (2 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every GH insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.