Home

Stefan A Dyckerhoff

CIK 1484394 · EVP Platform Systems Division · last filed 2026-08-10

Stefan A Dyckerhoff is an EVP Platform Systems Division who has filed 50 SEC Form 4 insider transactions across 10 companies since 2010. The most recent filing shows the insider sold $3.9M of ALAB on Aug 10, 2026. Across all open-market trades the lifetime net is −$68.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $101.4M 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.

Loading insider history…
Disclosed Exposure

$101.40M

Companies

10

Total Filings

50

Lifetime Open-Market Net

-$68.94M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
ALAB Director 362,273 $279.91 $101.40M -$62.99M 15 2026-08-10
SNOW 10%+ Owner — $319.80 — $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 $6.53 $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 9,726 — — $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

50 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
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
2026-05-07 ALAB Notice (144) −12,499 -$2.50M EDGAR
2026-04-21 ALAB Sell (S) −24,998 -$4.38M EDGAR
2026-04-17 ALAB Notice (144) −24,998 -$4.37M EDGAR
Showing 1–10 of 50
Page 1 of 5
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.