JOHN D DIEKMAN
CIK 1240357 · last filed 2025-06-23
JOHN D DIEKMAN is a corporate insider who has filed 26 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for ZLAB, was dated Jun 23, 2025. Across all open-market trades the lifetime net is −$75.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.2M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$4.20M
5
26
-$75.27M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ZLAB | Director | 99,769 | $17.07 | $1.70M | -$444.9K | 9 | 2025-06-23 |
| Q32 Bio Inc. (FIXX) Delisted | 10%+ Owner | 201,435 | $16.82 | $3.39M | -$36.76M | 1 | 2020-12-16 |
| APRE | 75,965 | $0.69 | $52.1K | -$39.85M | 1 | 2020-10-07 | |
| IDYA | Director | 84,420 | $28.98 | $2.45M | $2.50M | 2 | 2019-12-19 |
| AFFYMETRIX INC (AFFX) Delisted | Director | 103,398 | — | — | -$725.4K | 13 | 2012-05-15 |
Recent Filings
26 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-06-23 | ZLAB | Grant (A) | +10,831 | $0 | EDGAR |
| 2024-06-20 | ZLAB | Grant (A) | +21,253 | $0 | EDGAR |
| 2023-06-30 | ZLAB | Grant (A) | +18,903 | $500.0K | EDGAR |
| 2022-02-07 | ZLAB | Sell (S) | −1,000 | -$50.2K | EDGAR |
| 2022-01-04 | ZLAB | Grant (A) | +7,763 | $0 | EDGAR |
| 2021-11-08 | ZLAB | Sell (S) | −1,000 | -$91.7K | EDGAR |
| 2021-08-05 | ZLAB | Sell (S) | −1,000 | -$149.5K | EDGAR |
| 2021-05-06 | ZLAB | Sell (S) | −1,000 | -$153.6K | EDGAR |
| 2021-01-20 | ZLAB | Grant (A) | +3,852 | $0 | EDGAR |
| 2020-12-16 | Q32 Bio Inc. (FIXX) Delisted | Sell (S) | −3,000,000 | -$36.76M | EDGAR |