Dyckerhoff Stefan A
Director · ALAB
As of 2026-09-16, Dyckerhoff Stefan A has 53 Form 4 transactions on record across 1 company — 43 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-02 | ALAB | Sale | 5,409 @ $274.79 | $1.5M | −1.8% of holding | 297,007 | Form 4 |
| 2026-09-02 | ALAB | Sale | 2,275 @ $274.79 | $625K | −4.2% of holding | 51,413 | Form 4 |
| 2026-09-02 | ALAB | Sale | 1,867 @ $275.53 | $514K | −0.6% of holding | 295,140 | Form 4 |
| 2026-09-02 | ALAB | Sale | 785 @ $275.53 | $216K | −1.5% of holding | 50,628 | Form 4 |
| 2026-09-02 | ALAB | Sale | 650 @ $273.64 | $178K | −0.2% of holding | 302,416 | Form 4 |
| 2026-09-02 | ALAB | Sale | 429 @ $274.79 | $118K | −10.9% of holding | 3,489 | Form 4 |
| 2026-09-02 | ALAB | Sale | 407 @ $276.75 | $113K | −0.1% of holding | 294,733 | Form 4 |
| 2026-09-02 | ALAB | Sale | 273 @ $273.64 | $75K | −0.5% of holding | 53,688 | Form 4 |
| 2026-09-02 | ALAB | Sale | 172 @ $276.75 | $48K | −0.3% of holding | 50,456 | Form 4 |
| 2026-09-02 | ALAB | Sale | 148 @ $275.53 | $41K | −4.2% of holding | 3,341 | Form 4 |
| 2026-09-02 | ALAB | Sale | 52 @ $273.64 | $14K | −1.3% of holding | 3,918 | Form 4 |
| 2026-09-02 | ALAB | Sale | 32 @ $276.75 | $9K | −1.0% of holding | 3,309 | Form 4 |
| 2026-08-06 | ALAB | Sale | 5,246 @ $313.07 | $1.6M | −1.7% of holding | 303,066 | Form 4 |
| 2026-08-06 | ALAB | Sale | 2,447 @ $309.29 | $757K | −0.8% of holding | 308,952 | Form 4 |
| 2026-08-06 | ALAB | Sale | 2,207 @ $313.07 | $691K | −3.9% of holding | 53,961 | Form 4 |
| 2026-08-06 | ALAB | Sale | 1,029 @ $309.29 | $318K | −1.8% of holding | 56,437 | Form 4 |
| 2026-08-06 | ALAB | Sale | 640 @ $311.37 | $199K | −0.2% of holding | 308,312 | Form 4 |
| 2026-08-06 | ALAB | Sale | 416 @ $313.07 | $130K | −9.5% of holding | 3,970 | Form 4 |
| 2026-08-06 | ALAB | Sale | 269 @ $311.37 | $84K | −0.5% of holding | 56,168 | Form 4 |
| 2026-08-06 | ALAB | Sale | 194 @ $309.29 | $60K | −4.2% of holding | 4,437 | Form 4 |
| 2026-08-06 | ALAB | Sale | 51 @ $311.37 | $16K | −1.1% of holding | 4,386 | Form 4 |
| 2026-07-01 | ALAB | Sale | 8,333 @ $450.00 | $3.7M | −2.6% of holding | 311,399 | Form 4 |
| 2026-07-01 | ALAB | Sale | 3,505 @ $450.00 | $1.6M | −5.7% of holding | 57,466 | Form 4 |
| 2026-07-01 | ALAB | Sale | 661 @ $450.00 | $297K | −12.5% of holding | 4,631 | Form 4 |
| 2026-06-03 | ALAB | Sale | 7,314 @ $364.25 | $2.7M | −2.2% of holding | 320,751 | Form 4 |
| 2026-06-03 | ALAB | Sale | 3,077 @ $364.25 | $1.1M | −4.8% of holding | 60,562 | Form 4 |
| 2026-06-03 | ALAB | Sale | 1,019 @ $365.09 | $372K | −0.3% of holding | 319,732 | Form 4 |
| 2026-06-03 | ALAB | Sale | 580 @ $364.25 | $211K | −9.7% of holding | 5,373 | Form 4 |
| 2026-06-03 | ALAB | Sale | 428 @ $365.09 | $156K | −0.7% of holding | 60,134 | Form 4 |
| 2026-06-03 | ALAB | Sale | 81 @ $365.09 | $30K | −1.5% of holding | 5,292 | Form 4 |
| 2026-05-07 | ALAB | Sale | 4,238 @ $199.00 | $843K | −1.3% of holding | 332,160 | Form 4 |
| 2026-05-07 | ALAB | Sale | 4,095 @ $201.10 | $824K | −1.2% of holding | 328,065 | Form 4 |
| 2026-05-07 | ALAB | Sale | 1,783 @ $199.00 | $355K | −2.7% of holding | 65,361 | Form 4 |
| 2026-05-07 | ALAB | Sale | 1,722 @ $201.10 | $346K | −2.6% of holding | 63,639 | Form 4 |
| 2026-05-07 | ALAB | Sale | 336 @ $199.00 | $67K | −5.1% of holding | 6,278 | Form 4 |
| 2026-05-07 | ALAB | Sale | 325 @ $201.10 | $65K | −5.2% of holding | 5,953 | Form 4 |
| 2026-04-20 | ALAB | Sale | 8,933 @ $175.12 | $1.6M | −2.6% of holding | 336,398 | Form 4 |
| 2026-04-20 | ALAB | Sale | 3,757 @ $175.12 | $658K | −5.3% of holding | 67,144 | Form 4 |
| 2026-04-20 | ALAB | Sale | 709 @ $175.12 | $124K | −9.7% of holding | 6,614 | Form 4 |
| 2026-04-17 | ALAB | Sale | 7,733 @ $175.00 | $1.4M | −2.2% of holding | 345,331 | Form 4 |
| 2026-04-17 | ALAB | Sale | 3,253 @ $175.00 | $569K | −4.4% of holding | 70,901 | Form 4 |
| 2026-04-17 | ALAB | Sale | 613 @ $175.00 | $107K | −7.7% of holding | 7,323 | Form 4 |
| 2025-08-08 | ALAB | Sale | 25,000 @ $175.26 | $4.4M | −25.2% of holding | 74,154 | Form 4 |
| 2025-08-08 | ALAB | Sale | 1,000 @ $175.26 | $175K | −11.2% of holding | 7,936 | Form 4 |
| 2025-08-07 | ALAB | Sale | 13,963 @ $173.86 | $2.4M | −12.3% of holding | 99,251 | Form 4 |
| 2025-08-07 | ALAB | Sale | 10,940 @ $172.86 | $1.9M | −8.8% of holding | 113,214 | Form 4 |
| 2025-08-07 | ALAB | Sale | 559 @ $173.86 | $97K | −5.9% of holding | 8,939 | Form 4 |
| 2025-08-07 | ALAB | Sale | 438 @ $172.86 | $76K | −4.4% of holding | 9,498 | Form 4 |
| 2025-08-07 | ALAB | Sale | 97 @ $174.52 | $17K | −0.1% of holding | 99,154 | Form 4 |
| 2025-08-07 | ALAB | Sale | 3 @ $174.52 | $524 | −0.0% of holding | 8,936 | Form 4 |
3 award / exercise / gift records — not counted as purchases
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.