Comparable stake leader
WELLINGTON MANAGEMENT GROUP LLP
SEC ownership of Immunocore Holdings plc
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001671927.
Disclosed value leader
WELLINGTON MANAGEMENT GROUP LLP
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- IMCR on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
WELLINGTON MANAGEMENT GROUP LLP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
WELLINGTON MANAGEMENT GROUP LLP
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
- 0001671927
- Issuer location
- Oxfordshire, 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 Immunocore Holdings 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
WELLINGTON MANAGEMENT GRO...
Disclosed value leader
WELLINGTON MANAGEMENT GRO...
Comparable rows
50/50
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: WELLINGTON MANAGEMENT GROUP LLP
Showing 1-8 of 50 holder rows.
Quick read
WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 12%.
50 of 50 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 WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.
Comparable ownership
Top 5
WELLINGTON MANAGEMENT GROUP LLP
12%
FMR LLC
8.8%
Jallal Bahija
8.2%
PRIMECAP MANAGEMENT CO/CA/
7.5%
Bellevue Group AG
5.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
13F
Company
|
12%
|
$190,355,150
5,959,773 shares
|
+$26,410,388 | 30 Jun 2026 |
| FMR LLC |
13D/G
13F
Company
|
8.8%
|
$137,573,437
4,307,246 shares
|
$0 | 30 Jun 2026 |
| Jallal Bahija |
13D/G
3/4/5
CHIEF EXECUTIVE OFFICER, Director
|
8.2%
|
$135,513,072
4,493,139 shares
|
$0 | 31 Dec 2024 |
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
7.5%
|
$130,443,852
3,772,234 shares
|
+$38,165,393 | 30 Jun 2025 |
| Bellevue Group AG |
13D/G
13F
Company
|
5.6%
|
$101,607,853
2,796,803 shares
|
$0 | 20 Aug 2025 |
| TANG CAPITAL MANAGEMENT LLC |
13D/G
13F
Company
|
5.2%
|
$94,662,520
2,605,608 shares
|
$0 | 17 Oct 2025 |
| T. Rowe Price Investment Management, Inc. |
13D/G
|
3.7%
|
$60,417,704
1,891,600 shares
|
-$36,740,710 | 31 Mar 2026 |
| Vestal Point Capital, LP |
13D/G
13F
Company
|
3.5%
|
$57,492,000
1,800,000 shares
|
-$30,881,764 | 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
Net insider flow leans to selling over the last 12 months. Net value: -$10,449,605.
Buys
$0
Insiders: 0
Sells
$10,449,605
Insiders: 4
Net
-$10,449,605
Shares: -279,095
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 279,095
| 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 | 51,050 | $0 | $1,903,831 | -$1,903,831 |
| 9-12 | 0 | 228,045 | $0 | $8,545,775 | -$8,545,775 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to Immunocore Holdings plc. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
BAKER BROS. ADVISORS LP
Net 12M change
-$10,449,605
Latest report
27 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| BAKER BROS. ADVISORS LP | Director | $63,379,057 | Filing P/S | 15 May 2025 | ||
| Brian di Donato | Chief Financial Officer | $1,354,946 | Mixed | 16 Feb 2024 | ||
| Jallal Bahija | CHIEF EXECUTIVE OFFICER, Director | $399,296 | -$371,184 | -48% | Filing P/S | 17 Feb 2026 |
| David M. Berman | Head Of R&D | $189,538 | -$10,023,491 | -98% | Filing P/S | 17 Feb 2026 |
| Tina Amber St Leger | Chief Hr Officer | $36,199 | -$32,350 | -47% | Filing P/S | 17 Feb 2026 |
| John Goll | Svp, Finance & Cao | $21,124 | -$22,580 | -52% | Filing P/S | 17 Feb 2026 |
| William Pao | Director | Mixed | 27 May 2026 | |||
| Travis Alan Coy | Chief Financial Officer | Mixed | 17 Feb 2026 | |||
| John Irving Bell | Director | Mixed | 27 May 2026 | |||
| Ranjeev Krishana | Director | Mixed | 28 May 2024 | |||
| Kristine Peterson | Director | Mixed | 27 May 2026 | |||
| Robert J. Perez | Director | Mixed | 02 Jan 2024 | |||
| Roy Steven Herbst | Director | Mixed | 27 May 2026 | |||
| Peter John Ratcliffe | Director | Mixed | 27 May 2026 | |||
| Siddharth Kaul | Director | Mixed | 27 May 2026 |
Recent insider transactions for Immunocore Holdings 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Peter John Ratcliffe | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| Kristine Peterson | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| William Pao | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| Siddharth Kaul | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| Roy Steven Herbst | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| John Irving Bell | IMCR | Share Option (Right to Buy) | Award | 27,492 | 27,492 | 27 May 2026 | Direct | |||
| Bahija Jallal | IMCR | Ordinary Shares | Sale | -48.2% | $371,184 | $32.35 | -11,474 | 12,343 | 18 Feb 2026 | Direct |
| John Goll | IMCR | Ordinary Shares | Sale | -51.7% | $22,580 | $32.35 | -698 | 653 | 18 Feb 2026 | Direct |
| Tina Amber St Leger | IMCR | Ordinary Shares | Sale | -47.2% | $32,350 | $32.35 | -1,000 | 1,119 | 18 Feb 2026 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Sale | -50.4% | $192,968 | $32.35 | -5,965 | 5,859 | 18 Feb 2026 | Direct |
| Travis Alan Coy | IMCR | Employee Share Option (Right to Buy) | Award | 95,637 | 95,637 | 17 Feb 2026 | Direct | |||
| Travis Alan Coy | IMCR | Restricted Share Units | Award | 33,353 | 33,353 | 17 Feb 2026 | Direct | |||
| Bahija Jallal | IMCR | Ordinary Shares | Options Exercise | 23,817 | 23,817 | 17 Feb 2026 | Direct | |||
| Bahija Jallal | IMCR | Employee Share Option (Right to Buy) | Award | 395,066 | 395,066 | 17 Feb 2026 | Direct | |||
| Bahija Jallal | IMCR | Restricted Share Units | Award | 88,573 | 88,573 | 17 Feb 2026 | Direct | |||
| Bahija Jallal | IMCR | Restricted Share Units | Options Exercise | -25% | -23,817 | 71,453 | 17 Feb 2026 | Direct | ||
| John Goll | IMCR | Ordinary Shares | Options Exercise | 1,351 | 1,351 | 17 Feb 2026 | Direct | |||
| John Goll | IMCR | Employee Share Option (Right to Buy) | Award | 21,252 | 21,252 | 17 Feb 2026 | Direct | |||
| John Goll | IMCR | Restricted Share Units | Award | 7,411 | 7,411 | 17 Feb 2026 | Direct | |||
| John Goll | IMCR | Restricted Share Units | Options Exercise | -25% | -1,351 | 4,054 | 17 Feb 2026 | Direct | ||
| Tina Amber St Leger | IMCR | Ordinary Shares | Options Exercise | 2,119 | 2,119 | 17 Feb 2026 | Direct | |||
| Tina Amber St Leger | IMCR | Restricted Share Units | Options Exercise | -25% | -2,119 | 6,357 | 17 Feb 2026 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 11,824 | 11,824 | 17 Feb 2026 | Direct | |||
| David M. Berman | IMCR | Restricted Share Units | Options Exercise | -25% | -11,824 | 35,473 | 17 Feb 2026 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $22,960 | $40.14 | -572 | 0 | 05 Dec 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 572 | 572 | 05 Dec 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -4.61% | -572 | 11,832 | 05 Dec 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $1,261,789 | $40.26 | -31,341 | 0 | 04 Dec 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 31,341 | 31,341 | 04 Dec 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -71.6% | -31,341 | 12,404 | 04 Dec 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $221,337 | $40.09 | -5,521 | 0 | 28 Nov 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 5,521 | 5,521 | 28 Nov 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -11.2% | -5,521 | 43,745 | 28 Nov 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $2,784,488 | $40.12 | -69,404 | 0 | 26 Nov 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 69,404 | 69,404 | 26 Nov 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -58.5% | -69,404 | 49,266 | 26 Nov 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $721,341 | $40.03 | -18,020 | 0 | 25 Nov 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 18,020 | 18,020 | 25 Nov 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -13.2% | -18,020 | 118,670 | 25 Nov 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $4,000 | $40.00 | -100 | 0 | 24 Nov 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 100 | 100 | 24 Nov 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -0.07% | -100 | 136,690 | 24 Nov 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $2,178,940 | $35.23 | -61,849 | 0 | 30 Sep 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 61,849 | 61,849 | 30 Sep 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -31.1% | -61,849 | 136,790 | 30 Sep 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $7,002 | $35.01 | -200 | 0 | 15 Sep 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 200 | 200 | 15 Sep 2025 | Direct | |||
| David M. Berman | IMCR | Employee Share Option (Right to Buy) | Options Exercise | -0.1% | -200 | 198,639 | 15 Sep 2025 | Direct | ||
| David M. Berman | IMCR | Ordinary Shares | Sale | -100% | $803,699 | $35.67 | -22,532 | 0 | 12 Sep 2025 | Direct |
| David M. Berman | IMCR | Ordinary Shares | Options Exercise | 22,532 | 22,532 | 12 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.