Buesinger Robert F.

Officer · WLK

As of 2026-09-16, Buesinger Robert F. has 19 Form 4 transactions on record across 1 company — 8 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.

Reconstructed holdings

Direct: $2.4MIndirect: $0$2.4Mas of 2026-09-16
  • Direct $2.4M
  • Indirect $0
WLKdirect34,482 sh$2.4M

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

WLK · 19 trades
2026-03-27: Sale, 4,000 sh ($461K)2026-02-20: Withheld for tax, 326 sh ($31K)2026-02-20: Award / grant, 5,281 sh ($0)2026-02-20: Award / grant, 19,351 sh ($0)2026-02-19: Award / grant, 1,301 sh ($0)2026-02-18: Withheld for tax, 903 sh ($89K)2026-02-17: Option exercise, 3,478 sh ($0)2026-02-17: Option exercise, 3,478 sh ($0)2025-05-27: Sale, 83 sh ($6K)2025-04-22: Purchase, 83 sh ($8K)2025-04-11: Award / grant, 17,101 sh ($0)2025-02-21: Withheld for tax, 2,738 sh ($303K)2025-02-21: Award / grant, 13,141 sh ($0)2025-02-21: Award / grant, 4,356 sh ($0)2025-02-20: Award / grant, 6,839 sh ($0)2025-02-19: Withheld for tax, 3,851 sh ($429K)2025-02-19: Withheld for tax, 164 sh ($18K)2025-02-18: Option exercise, 12,923 sh ($0)2025-02-18: Option exercise, 12,923 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-03-27WLKSale4,000 @ $115.25$461K−10.4% of holding34,482Form 4
2025-05-27WLKSale83 @ $72.70$6K−100.0% of holding0Form 4
2025-04-22WLKPurchase83 @ $93.39$8Kownership Δ n/a83Form 4
16 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-02-20WLKWithheld for tax32638,482Form 4
2026-02-20WLKAward / grant5,2815,281Form 4
2026-02-20WLKAward / grant19,35119,351Form 4
2026-02-19WLKAward / grant1,30138,808Form 4
2026-02-18WLKWithheld for tax90337,507Form 4
2026-02-17WLKOption exercise3,47838,410Form 4
2026-02-17WLKOption exercise3,4780Form 4
2025-04-11WLKAward / grant17,10117,101Form 4
2025-02-21WLKWithheld for tax2,73834,932Form 4
2025-02-21WLKAward / grant13,14113,141Form 4
2025-02-21WLKAward / grant4,3564,356Form 4
2025-02-20WLKAward / grant6,83937,670Form 4
2025-02-19WLKWithheld for tax3,85130,995Form 4
2025-02-19WLKWithheld for tax16430,831Form 4
2025-02-18WLKOption exercise12,9230Form 4
2025-02-18WLKOption exercise12,92334,846Form 4

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.