Martha J Demski insider trades: Alpha Teknova (TKNO) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Martha reports to the SEC
Open-market buys and sales
22 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jun 27, 2025 | TKNO | ↓ Sell10b5-1 | 8,000 | $5.06 | $41K | Direct | Jul 1, 2025 (4d) |
| May 10, 2023 | CMRX | ↑ Buy | 18,000 | $1.11 | $20K | By the Martha J. Demski Trust u/a 10/01/ | May 11, 2023 (1d) |
| May 17, 2022 | CMRX | ↑ Buy | 10,000 | $1.61 | $16K | By the Martha J. Demski Trust u/a 10/01/ | May 17, 2022 (0d) |
| Jun 7, 2021 | ADMS | ↓ Sell | 2,000 | $5.17 | $10K | Direct | Jun 8, 2021 (1d) |
| Sep 11, 2020 | ADMA | ↑ Buy | 2,200 | $2.29 | $5K | Indirect | Sep 14, 2020 (3d) |
| Aug 13, 2020 | ADMA | ↑ Buy | 2,000 | $2.88 | $6K | Indirect | Aug 14, 2020 (1d) |
| Aug 10, 2020 | CMRX | ↓ Sell | 1,584 | $3.25 | $5K | Direct | Aug 11, 2020 (1d) |
| Aug 7, 2020 | CMRX | ↓ Sell | 5,000 | $3.27 | $16K | Direct | Aug 10, 2020 (3d) |
| Aug 5, 2020 | CMRX | ↓ Sell | 7,500 | $3.26 | $24K | Direct | Aug 6, 2020 (1d) |
| May 28, 2019 | CMRX | ↑ Buy | 18,000 | $3.60 | $65K | By the Martha J. Demski Trust u/a 10/01/ | May 29, 2019 (1d) |
| Mar 1, 2016 | CMRX | ↑ Buy | 10,000 | $4.89 | $49K | Direct | Mar 2, 2016 (1d) |
| Nov 2, 2015 | CMRX | ↓ Sell | 1,126 | $41.35 | $47K | Direct | Nov 3, 2015 (1d) |
| Oct 1, 2015 | CMRX | ↓ Sell | 2,000 | $37.68 | $75K | Direct | Oct 2, 2015 (1d) |
| Sep 1, 2015 | CMRX | ↓ Sell | 2,000 | $48.18 | $96K | Direct | Sep 3, 2015 (2d) |
| Aug 3, 2015 | CMRX | ↓ Sell | 2,000 | $54.61 | $109K | Direct | Aug 5, 2015 (2d) |
| Jul 1, 2015 | CMRX | ↓ Sell | 2,000 | $46.03 | $92K | Direct | Jul 2, 2015 (1d) |
| Jun 1, 2015 | CMRX | ↓ Sell | 2,000 | $41.58 | $83K | Direct | Jun 3, 2015 (2d) |
| May 1, 2015 | CMRX | ↓ Sell | 2,000 | $34.71 | $69K | Direct | May 4, 2015 (3d) |
| Apr 1, 2015 | CMRX | ↓ Sell | 2,000 | $36.88 | $74K | Direct | Apr 3, 2015 (2d) |
| Mar 2, 2015 | CMRX | ↓ Sell | 2,000 | $40.17 | $80K | Direct | Mar 3, 2015 (1d) |
| Feb 2, 2015 | CMRX | ↓ Sell | 2,000 | $38.38 | $77K | Direct | Feb 3, 2015 (1d) |
| Jan 2, 2015 | CMRX | ↓ Sell | 2,000 | $41.08 | $82K | Direct | Jan 6, 2015 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other TKNO insiders
Open-market trades in the last 12 months
About Martha J Demski's insider trades
Martha J Demski is a director at Alpha Teknova (TKNO). Since Jan 2, 2015, Martha has reported 6 open-market purchases worth $161K and 16 sales worth $982K on SEC Form 4. There have been no open-market trades in the last 12 months.
1 sale (4% of the value sold) was made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so it says little about how the insider sees the stock today.
Their filings also include grants and awards (40 filings), option exercises (17 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 TKNO insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.