Comparable stake leader
Bruce W. Duncan
SEC ownership of CyrusOne Holdco LLC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001553023.
Disclosed value leader
—
Comparable rows
0/1
Latest evidence
18 May 2021
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Bruce W. Duncan
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
18 May 2021
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001553023
- Issuer location
- Dallas, TX
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 CyrusOne Holdco LLC (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
Bruce W. Duncan
Disclosed value leader
—
Comparable rows
0/1
Latest evidence
18 May 2021
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
1 rows are not safely comparable across share classes.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 1 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 Bruce W. Duncan's linked filing trail.
Detailed SEC evidence table Showing 1-1 of 1 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Bruce W. Duncan |
3/4/5
President & CEO, Director
|
—
class O/S missing
|
—
21,037 shares
|
— | 18 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 03 Aug 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 1-12 of 12 reporting-owner rows connected to CyrusOne Holdco LLC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Katherine Motlagh
Net 12M change
$0
Latest report
25 Mar 2022
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Katherine Motlagh | Evp & Cfo | Mixed | 25 Mar 2022 | |||
| David H. Ferdman | President & CEO, Director | Mixed | 25 Mar 2022 | |||
| Denise Olsen | Director | Mixed | 25 Mar 2022 | |||
| John W. Gamble Jr. | Director | Mixed | 25 Mar 2022 | |||
| Bruce W. Duncan | President & CEO, Director | Mixed | 18 May 2021 | |||
| Robert M. Jackson | EVP & General Counsel | Mixed | 25 Mar 2022 | |||
| Tod Nielsen | Director | Mixed | 25 Mar 2022 | |||
| Mark Skomal | SVP & Chief Accounting Officer | Mixed | 25 Mar 2022 | |||
| William E. Sullivan | Director | Mixed | 25 Mar 2022 | |||
| Alex Shumate | Director | Mixed | 25 Mar 2022 | |||
| Lynn A. Wentworth | Director | Mixed | 25 Mar 2022 | |||
| John Hatem | Evp & Coo | Mixed | 25 Mar 2022 |
Recent insider transactions for CyrusOne Holdco LLC
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.