Holder evidence
2
SEC ownership of Mimecast Ltd
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001644675.
Lead holder
Dino DiMarino
13D/G signal
—
Latest evidence
01 Oct 2021
- CIK
- 0001644675
- Location
- London, United Kingdom
- SEC evidence mix
- 3/4/5
- Lead holder
- Dino DiMarino
- Latest evidence date
- 01 Oct 2021
Issuer identity
Ownership snapshot
Ownership snapshot
Top shareholders of Mimecast Ltd (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
Dino DiMarino
13D/G signal
—
Evidence rows
2
Latest as of
01 Oct 2021
3/4/5
Highest disclosed value: $1,409,091
Rank 1 holder
Dino DiMarino
3/4/5
- Ownership
- —
- Position
- $1.41M
Rank 2 holder
John J. Walsh Jr.
3/4/5
- Ownership
- —
- Position
- $196.2K
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Dino DiMarino |
3/4/5
Chief Revenue Officer
|
—
mixed-class rows
|
$1,409,091
17,714 shares
mixed-class rows
|
— | 01 Oct 2021 |
| John J. Walsh Jr. |
3/4/5
Sr. Vice Pres., Engineering
|
—
mixed-class rows
|
$196,226
83,967 shares
mixed-class rows
|
— | 21 May 2021 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 31 May 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to Mimecast Ltd. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Lead holder
Dino DiMarino
Net 12M change
$0
Latest report
19 May 2022
Recent insider transactions for Mimecast Ltd
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Reported value | Reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* indicates a reported price that failed the local validity check.