Poseida Therapeutics, Inc.
Poseida Therapeutics, Inc. (PSTX) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · PSTX · as of Jun 9, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
2
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Poseida Therapeutics, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
PSTX insider buying and selling by quarter
PSTX insider selling · PSTX insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Recent insider transactions
PSTX executive sell shares · PSTX board member insider trading · PSTX insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Jan 8, 2025 | Amado Rafael Director | Other | 58,950 | $531K | Form 4 |
| Jan 8, 2025 | Corning Luke Director | Other | 58,950 | $531K | Form 4 |
| Jan 8, 2025 | Schmid John P. Director | Other | 58,950 | $531K | Form 4 |
| Jan 8, 2025 | Lloyd Marcea Bland Director | Other | 68,950 | $621K | Form 4 |
| Jan 8, 2025 | Collins Cynthia Director | Other | 58,950 | $531K | Form 4 |
| Jan 8, 2025 | BAUM CHARLES M Director | Other | 78,600 | $707K | Form 4 |
| Jan 8, 2025 | Mylet Johanna CFO | Other | 254,852 | $2.29M⚡ | Form 4 |
| Jan 8, 2025 | Rizvi Syed Ali-aamir Chief Medical Officer | Other | 185,000 | $1.67M⚡ | Form 4 |
| Jan 8, 2025 | LEONHARDT HARRY J GC & Chief Compliance Officer | Other | 223,640 | $2.01M⚡ | Form 4 |
| Jan 8, 2025 | Gergen Mark J President and CEO · Director | Other | 636,726 | $5.73M⚡ | Form 4 |
| Jan 8, 2025 | Yarema Kristin President and CEO | Other | 615,836 | $5.54M⚡ | Form 4 |
| Jan 2, 2025 | Gergen Mark J Executive Chairman · Director | Other | 23,313 | $224K | Form 4 |
| Dec 10, 2024 | Gergen Mark J Executive Chairman · Director | Option | 30,000 | $83K | Form 4 |
| Dec 10, 2024 | Gergen Mark J Executive Chairman · Director | Sale | 30,000 | $284K | Form 4 |
| Nov 26, 2024 | Gergen Mark J Executive Chairman · Director | Option | 30,000 | $83K | Form 4 |
| Nov 26, 2024 | Gergen Mark J Executive Chairman · Director | Sale | 30,000 | $278K | Form 4 |
| Jun 17, 2024 | Schmid John P. Director | Award | 19,650 | — | Form 4 |
| Jun 17, 2024 | Lloyd Marcea Bland Director | Award | 19,650 | — | Form 4 |
| Jun 17, 2024 | Corning Luke Director | Award | 19,650 | — | Form 4 |
| Jun 17, 2024 | Collins Cynthia Director | Award | 19,650 | — | Form 4 |
| Jun 17, 2024 | BAUM CHARLES M Director | Award | 19,650 | — | Form 4 |
| Jun 17, 2024 | Amado Rafael Director | Award | 19,650 | — | Form 4 |
| Apr 1, 2024 | Rizvi Syed Ali-aamir Chief Medical Officer | Award | 185,000 | — | Form 4 |
| Mar 1, 2024 | Mylet Johanna CFO | Award | 80,743 | — | Form 4 |
| Mar 1, 2024 | Mylet Johanna CFO | Other | 18,091 | $75K | Form 4 |
Rizvi Syed Ali-aamir
Chief Medical Officer
Date
Jan 8
Shares
185,000
Price
$9.00
Value
$1.67M ⚡
LEONHARDT HARRY J
GC & Chief Compliance Officer
Date
Jan 8
Shares
223,640
Price
$9.00
Value
$2.01M ⚡
Gergen Mark J
President and CEO · Director
Date
Jan 8
Shares
636,726
Price
$9.00
Value
$5.73M ⚡
Yarema Kristin
President and CEO
Date
Jan 8
Shares
615,836
Price
$9.00
Value
$5.54M ⚡
Gergen Mark J
Executive Chairman · Director
Date
Jan 2
Shares
23,313
Price
$9.60
Value
$224K
Gergen Mark J
Executive Chairman · Director
Date
Dec 10
Shares
30,000
Price
$2.78
Value
$83K
Gergen Mark J
Executive Chairman · Director
Date
Dec 10
Shares
30,000
Price
$9.46
Value
$284K
Gergen Mark J
Executive Chairman · Director
Date
Nov 26
Shares
30,000
Price
$2.78
Value
$83K
Gergen Mark J
Executive Chairman · Director
Date
Nov 26
Shares
30,000
Price
$9.27
Value
$278K
Rizvi Syed Ali-aamir
Chief Medical Officer
Date
Apr 1
Shares
185,000
Price
—
Value
—
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About PSTX insider trading
PSTX insider trades
Poseida Therapeutics, Inc. (PSTX) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including PSTX. Over the past 12 months, 0 insiders have filed transactions with the SEC. PSTX insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Poseida Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
PSTX insider trading · 5 questionsThe insiders of Poseida Therapeutics, Inc. (PSTX) include executives and directors such as PSTX, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026