Stefan A Dyckerhoff
CIK 1484394 · EVP Platform Systems Division · last filed 2026-10-09
Stefan A Dyckerhoff is an EVP Platform Systems Division who has filed 53 SEC Form 4 insider transactions across 10 companies since 2010. The most recent filing, for ALAB, was dated Oct 9, 2026. Across all open-market trades the lifetime net is −$77.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $14.5M across reported positions. 6 SEC filings were submitted jointly with Pure Storage, Inc.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
ALAB price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
SUITE A-200
PALO ALTO, CA 94304
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ALAB | Director | 50,786 | $285.82 | $14.52M | -$71.13M | 17 | 2026-10-09 |
| SNOW | 10%+ Owner | — | $306.84 | — | $0 | 2 | 2020-09-22 |
| Forty Seven, Inc. (FTSV) Delisted | 41,305 | — | — | $2.19M | 1 | 2018-07-03 | |
| Everpure, Inc. (PSTG) Delisted | 10%+ Owner | 25,520 | $67.80 | $1.73M | -$860.8K | 5 | 2018-01-12 |
| YEXT | 10%+ Owner | 0 | $6.90 | $0 | $0 | 2 | 2017-12-05 |
| Venus Concept Inc. (HAIR) Delisted | 10%+ Owner | 1,183 | — | — | $0 | 2 | 2017-10-18 |
| Mattersight Corp (MATR) Delisted | 10%+ Owner | 852,651 | — | — | -$5.65M | 4 | 2017-06-02 |
| Molecular Templates, Inc. (THLD) Delisted | 10%+ Owner | 449,278 | — | — | -$2.35M | 2 | 2014-10-03 |
| DEXTERA SURGICAL INC (CRDC) Delisted | 10%+ Owner | 973 | — | — | $1.05M | 1 | 2013-03-22 |
| JUNIPER NETWORKS INC (JNPR) Delisted | EVP Platform Systems Division | 0 | $39.95 | $0 | -$326.8K | 5 | 2012-02-21 |
Recent Filings
53 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-09 | ALAB | Mixed | −12,431 | -$4.68M | EDGAR |
| 2026-10-07 | ALAB | Notice (144) | −12,499 | -$4.70M | EDGAR |
| 2026-09-03 | ALAB | Sell (S) | −12,499 | -$3.44M | EDGAR |
| 2026-08-10 | ALAB | Sell (S) | −12,499 | -$3.90M | EDGAR |
| 2026-08-06 | ALAB | Notice (144) | −12,499 | -$3.90M | EDGAR |
| 2026-07-02 | ALAB | Sell (S) | −12,499 | -$5.62M | EDGAR |
| 2026-07-01 | ALAB | Notice (144) | −12,499 | -$5.62M | EDGAR |
| 2026-06-05 | ALAB | Mixed | −11,662 | -$4.55M | EDGAR |
| 2026-06-03 | ALAB | Notice (144) | −12,499 | -$4.55M | EDGAR |
| 2026-05-11 | ALAB | Sell (S) | −12,499 | -$2.50M | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.