Company profile
Geron Corp Insider Trading
GERNEvery SEC Form 4 insider trading filing for Geron Corp (GERN) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Pharmaceutical Preparations
- CIK
- 0000886744
- Filings
- 92
- Insiders
- 21
- Last filing
- 2026-06-30
Activity summary
No insider transactions in the last 30 days. The most recent was on June 30, 2026, when Spiegel Robert J. bought 6,103 shares. 92 filings from 21 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q3 23 to Q2 26. Geron Corp insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $5.8M.
90 day insight
Over the last 90 days, Geron Corp insiders bought $8K across 1 transaction with no open-market sales.
- Most active insider: Spiegel Robert J. with 1 transaction totaling $8K.
- Largest single purchase: $8K by Spiegel Robert J. on Jun 30, 2026.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 30, 2026 | Spiegel Robert J. | GERN | Award | 6,103 | $1.28 | $8K |
| May 20, 2026 | McDonald John F | GERN | Award | 220,000 | — | — |
| May 20, 2026 | O'Farrell Elizabeth G. | GERN | Award | 220,000 | — | — |
| May 20, 2026 | Molineaux Susan | GERN | Award | 220,000 | — | — |
| May 20, 2026 | Bir Dawn Carter | GERN | Award | 220,000 | — | — |
45 more transactions hidden
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-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Geron Corp as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →