Comparable stake leader
Hugh Griffith
SEC ownership of NuCana plc
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001709626.
Disclosed value leader
Hugh Griffith
Comparable rows
5/17
Latest evidence
30 Jun 2026
- Public ticker
- NCNA on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Hugh Griffith
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
5 of 17
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Hugh Griffith
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001709626
- Issuer location
- Edinburgh, United Kingdom
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NuCana plc (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
Hugh Griffith
Disclosed value leader
Hugh Griffith
Comparable rows
5/17
Latest evidence
30 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 12%
12 rows are not safely comparable across share classes.
13D/G row: Hugh Griffith
Showing 1-8 of 17 holder rows.
Quick read
Hugh Griffith leads the comparable SEC ownership view at 12%.
5 of 17 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 Hugh Griffith's linked filing trail.
Comparable ownership
Top 5
Hugh Griffith
12%
SOFINNOVA CAPITAL VI FCPR
5.1%
Carlyle Group Inc.
2.4%
Martin C.b. Mellish
0%
Elliott M. Levy
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 17 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Hugh Griffith |
13D/G
3/4/5
Hugh S. Griffith · Chief Executive Officer, Director
|
12%
|
$84,898,857
2,829,961,890 shares
|
$0 | 20 Jun 2025 |
| SOFINNOVA CAPITAL VI FCPR |
13D/G
|
5.1%
|
$2,793,266
4,987,975 shares
|
$0 | 14 Feb 2025 |
| Carlyle Group Inc. |
13D/G
The Carlyle Group Inc.
|
2.4%
|
$1,920,835
3,430,062 shares
|
$0 | 18 Apr 2025 |
| Martin C.b. Mellish |
3/4/5
Director
|
0%
|
—
28 shares
|
— | 18 Mar 2026 |
| Elliott M. Levy |
3/4/5
Director
|
0%
|
—
13 shares
|
— | 19 Jun 2026 |
| StoneX Group Inc. |
13F
Company
|
—
class O/S missing
|
$71,510
47,043 shares
|
— | 30 Jun 2026 |
| CITADEL ADVISORS LLC |
13F
Company
|
—
class O/S missing
|
$41,190
27,099 shares
|
— | 30 Jun 2026 |
| HRT FINANCIAL LP |
13F
Company
|
—
class O/S missing
|
$25,000
16,870 shares
|
— | 30 Jun 2026 |
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 27 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 1-9 of 9 reporting-owner rows connected to NuCana plc. Open a relationship link for the CIK-to-CIK filing trail.
Rows
9
Largest Forms 3/4/5 holder
Hugh Griffith
Net 12M change
$0
Latest report
19 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Hugh Griffith | Chief Executive Officer, Director | $30,000 | Mixed | 18 Mar 2026 | ||
| Jeffrey D. Bloss | Chief Medical Officer | $1,414 | Mixed | 19 Jun 2026 | ||
| Elliott M. Levy | Director | $0 | Mixed | 19 Jun 2026 | ||
| Martin C.b. Mellish | Director | $0 | Mixed | 18 Mar 2026 | ||
| Ian Alexander Webster | Exhibit 24.1 - Power of Attorney Interim Chief Financial Officer | Mixed | 18 Mar 2026 | |||
| Cyrille Leperlier | Director | Mixed | 18 Mar 2026 | |||
| Theresa Margaret Ms Bruce | Chief Operating Officer | Mixed | 15 Apr 2026 | |||
| David James Harrison | Head of Translational Medicine | Mixed | 18 Mar 2026 | |||
| Andrew Martin Kay | Director | Mixed | 18 Mar 2026 |
Recent insider transactions for NuCana plc
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Elliott M. Levy | NCNA | Options | Disposed to Issuer | -100% | -23,811,896 | 0 | 19 Jun 2026 | Direct | ||
| Jeffrey D. Bloss | NCNA | Options | Disposed to Issuer | -25% | -36,539,720 | 109,619,160 | 19 Jun 2026 | Direct | ||
| Theresa Margaret Ms Bruce | NCNA | Options | Award | 132,600,130 | 132,600,130 | 15 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.