Comparable stake leader
Dino DiMarino
SEC ownership of Mimecast Ltd
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001644675.
Disclosed value leader
Dino DiMarino
Comparable rows
0/2
Latest evidence
01 Oct 2021
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Dino DiMarino
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
01 Oct 2021
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001644675
- Issuer location
- London, United Kingdom
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
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.
Comparable stake leader
Dino DiMarino
Disclosed value leader
Dino DiMarino
Comparable rows
0/2
Latest evidence
01 Oct 2021
3/4/5
Highest disclosed value: $1,409,091
2 rows are not safely comparable across share classes.
Quick read
Dino DiMarino has the largest disclosed position value at $1.41M.
0 of 2 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Dino DiMarino's linked filing trail.
Disclosed position value
Top 2
Dino DiMarino
$1.41M
John J. Walsh Jr.
$196.2K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-2 of 2 holder rows
| 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 25 Jun 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
Largest Forms 3/4/5 holder
Dino DiMarino
Net 12M change
$0
Latest report
19 May 2022
Recent insider transactions for Mimecast Ltd
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.