Ackerman John

Director · GRDN

As of 2026-09-16, Ackerman John has 30 Form 4 transactions on record across 1 company — 18 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: $0Indirect: $21.9M$21.9Mas of 2026-09-16
  • Direct $0
  • Indirect $21.9M
GRDNindirect471,057 sh$21.9M

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

GRDN · 30 trades
2026-03-28: Option exercise, 1,413,939 sh2026-03-28: Option exercise, 1,413,939 sh2026-03-28: Option exercise, 1,413,939 sh2026-03-28: Option exercise, 471,057 sh2026-03-28: Option exercise, 471,057 sh2026-03-28: Option exercise, 471,057 sh2026-03-28: Option exercise, 1,413,939 sh2026-03-28: Option exercise, 471,057 sh2026-03-20: Sale, 827,636 sh ($24.6M)2026-03-20: Sale, 275,728 sh ($8.2M)2025-09-27: Option exercise, 1,413,940 sh2025-09-27: Option exercise, 1,413,940 sh2025-09-27: Option exercise, 471,057 sh2025-09-27: Option exercise, 471,057 sh2025-09-27: Option exercise, 1,413,940 sh2025-09-27: Option exercise, 471,057 sh2025-09-27: Option exercise, 1,413,940 sh2025-09-27: Option exercise, 471,057 sh2025-05-28: Sale, 150,998 sh ($3.0M)2025-05-28: Sale, 50,305 sh ($1.0M)2025-05-27: Sale, 813,318 sh ($16.4M)2025-05-27: Sale, 270,958 sh ($5.5M)2025-03-28: Option exercise, 471,057 sh2025-03-28: Option exercise, 1,413,940 sh2025-03-28: Option exercise, 1,413,940 sh2025-03-28: Option exercise, 1,413,940 sh2025-03-28: Option exercise, 471,057 sh2025-03-28: Option exercise, 471,057 sh2025-03-28: Option exercise, 471,057 sh2025-03-28: Option exercise, 1,413,940 sh

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-03-20GRDNSale827,636 @ $29.68$24.6M−44.4% of holding1,035,928Form 4
2026-03-20GRDNSale275,728 @ $29.68$8.2M−44.4% of holding345,123Form 4
2025-05-28GRDNSale150,998 @ $20.16$3.0M−25.1% of holding449,624Form 4
2025-05-28GRDNSale50,305 @ $20.16$1.0M−25.1% of holding149,794Form 4
2025-05-27GRDNSale813,318 @ $20.16$16.4M−57.5% of holding600,622Form 4
2025-05-27GRDNSale270,958 @ $20.16$5.5M−57.5% of holding200,099Form 4
24 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-03-28GRDNOption exercise1,413,9392,449,867Form 4
2026-03-28GRDNOption exercise1,413,9391,413,939Form 4
2026-03-28GRDNOption exercise1,413,9392,449,867Form 4
2026-03-28GRDNOption exercise471,057471,057Form 4
2026-03-28GRDNOption exercise471,057816,180Form 4
2026-03-28GRDNOption exercise471,057471,057Form 4
2026-03-28GRDNOption exercise1,413,9391,413,939Form 4
2026-03-28GRDNOption exercise471,057816,180Form 4
2025-09-27GRDNOption exercise1,413,9401,863,564Form 4
2025-09-27GRDNOption exercise1,413,9402,827,878Form 4
2025-09-27GRDNOption exercise471,057620,851Form 4
2025-09-27GRDNOption exercise471,057942,114Form 4
2025-09-27GRDNOption exercise1,413,9401,863,564Form 4
2025-09-27GRDNOption exercise471,057620,851Form 4
2025-09-27GRDNOption exercise1,413,9402,827,878Form 4
2025-09-27GRDNOption exercise471,057942,114Form 4
2025-03-28GRDNOption exercise471,057471,057Form 4
2025-03-28GRDNOption exercise1,413,9404,241,818Form 4
2025-03-28GRDNOption exercise1,413,9401,413,940Form 4
2025-03-28GRDNOption exercise1,413,9401,413,940Form 4
2025-03-28GRDNOption exercise471,057471,057Form 4
2025-03-28GRDNOption exercise471,0571,413,171Form 4
2025-03-28GRDNOption exercise471,0571,413,171Form 4
2025-03-28GRDNOption exercise1,413,9404,241,818Form 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.