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IMCR · Immunocore Holdings plc · Holdings

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$32.60 +2.76 (+9.25%) At close · Oct 20
Rebalance outlook locked
Market Cap
$1.54B
Shares
51.50M
Volume · Oct 20 942.12K Avg daily vol (3M) 436.45K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of IMCR: 13F, 13D and 13G, insiders and funds →
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 135
Total Value: $1,675,441,905
Total Shares: 52,776,838
Showing 1–100 of 144 holdings by value · page 1 of 2

Institutional Ownership Trend

23 quarters

Superinvestors Holding IMCR

All superinvestors →
Ray Dalio $1,165,447

Holder Concentration

Across 135 13F filers
Top Holder
10.8%
Sep 2023 → Jun 2026 · range 9.0% – 16.4%
of institutional value
Top 5
40.4%
Sep 2023 → Jun 2026 · range 38.5% – 56.4%
of institutional value
Top 10
57.7%
Sep 2023 → Jun 2026 · range 57.7% – 73.4%
of institutional value
HHI
464
Sep 2023 → Jun 2026 · range 451 – 781
Broadly held

Who Holds IMCR

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 135 filers, like-for-like change -0.5%; actively managed books -0.8%; index-like books +7.2%.

Holder type Share Filers Change
Registered adviser 50.6% 61 +6.3%
Exempt adviser 2.0% 5 +270.7%
Adviser 0.6% 1 -91.9%
Bank 0.6% 8 -42.1%
Insurer 0.9% 1 -6.4%
Broker-dealer 0.0% 1 +1919.0%
Benefit plan 0.1% 1 +116.2%
Non-US 5.6% 4 -27.4%
Holding company 21.8% 6 +5.6%
Unknown 17.8% 47 +20.7%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

135 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
2
1.48% of filers hold it in their top 10
Mar 31, 2026: 3
Holders above 5%
1
median weight 0.007%
Mar 31, 2026: 0
Crowding
—
holders exceed shares outstanding: 13F filers report more shares than the cover-page count, which predates an issuance, is misstated, or misses shares lent and reported twice
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
holders exceed shares outstanding: 13F filers report more shares than the cover-page count, which predates an issuance, is misstated, or misses shares lent and reported twice
Top 10 holders
58.4%
of 13F shares, Herfindahl 0.047
Active holders
-0.8%
like-for-like share change of active filers
5% stakes on record
8
0 13D, 8 13G (5 institutional, 1 passive, 1 exempt)
How long holders have held it value-weighted 13.3 quarters
Under 1 year 17.5% 1 to 3 years 26.5% 3 years or more 55.9% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$39.18
estimated per share
Mar 31, 2026: $40.98
Quarter-end price
$31.75
implied by 13F values
Estimated gain or loss
-19.0%
price against the estimated cost
Estimated at a loss
82.2%
of costed 13F value

Estimated cost covers 97.8% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies IMCR's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 AVTX Avalo Therapeutics, Inc. 11
2 VERA Vera Therapeutics, Inc. 11
3 KLRA Kailera Therapeutics, Inc. 7
4 NRIX Nurix Therapeutics, Inc. 10
5 TARS Tarsus Pharmaceuticals, Inc. 8
6 FDMT 4D Molecular Therapeutics, Inc. 7
7 IRON Disc Medicine, Inc. 9
8 GHRS GH Research PLC 5
9 DYN Dyne Therapeutics, Inc. 9
10 OLMA Olema Pharmaceuticals, Inc. 7

Shareholder Targets

13F filers that own its peers but not IMCR, quarter ended Jun 30, 2026

Found through its holder-overlap peers: AVTX, VERA, KLRA, NRIX, TARS, FDMT, IRON, GHRS, DYN, OLMA, GLUE, DNTH, VRDN, IVA, CMPS, RLAY, COGT, SYRE, CBIO, PTGX. 732 filers in all.

# Filer In peers
1 VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like $2,230,854,711 17 held
2 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $1,415,501,662 17 held
3 T. Rowe Price Investment Management, Inc. Adviser, Diversified active $1,134,854,918 4 held
4 TCG Crossover Management, LLC Unknown, Diversified active $968,250,704 8 held
5 PERCEPTIVE ADVISORS LLC Registered adviser, Diversified active $955,475,630 9 held
6 FARALLON CAPITAL MANAGEMENT LLC Registered adviser, Diversified active $849,302,837 4 held
7 Paradigm Biocapital Advisors LP Registered adviser, Concentrated $762,788,508 5 held
8 Bain Capital Life Sciences Investors, LLC Unknown, Concentrated $631,809,287 4 held
9 Fairmount Funds Management LLC Registered adviser, Concentrated $603,289,589 4 held
10 Venrock Adviser, LLC Registered adviser, Concentrated $590,161,207 6 held

Fund Ownership of IMCR by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 1.05% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.05% 26,042
Index ETFs 1.00% 516,877
Active ETFs 0.06% 30,849
Active funds 12.44% 6,407,799
Unclassified 0.03% 13,778
All registered funds 13.58% 6,995,345
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 62 Exempt adviser 5 Adviser 1 Bank 8 Insurer 1 Broker-dealer 1 Benefit plan 1 Non-US 4 Holding company 6 Unknown 46
Showing 100 of 144
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
WELLINGTON MANAGEMENT GROUP LLP $181,671,752 10.84% 5,721,945
RTW INVESTMENTS, LP $154,616,086 9.23% 4,869,798
FMR LLC $136,755,060 8.16% 4,307,246
PRIMECAP MANAGEMENT CO/CA/ $115,514,151 6.89% 3,638,241
Bellevue Group AG $88,526,778 5.28% 2,788,245
TANG CAPITAL MANAGEMENT LLC $84,117,434 5.02% 2,649,368
Vestal Point Capital, LP $57,150,000 3.41% 1,800,000
TWO SIGMA INVESTMENTS, LP $52,355,210 3.12% 1,648,983
MILLENNIUM MANAGEMENT LLC $50,705,924 3.03% 1,597,037
ARMISTICE CAPITAL, LLC $45,339,000 2.71% 1,428,000
Caligan Partners LP $43,856,814 2.62% 1,381,317
Kynam Capital Management, LP $43,656,250 2.61% 1,375,000
BVF INC/IL $41,099,200 2.45% 1,294,463
ACADIAN ASSET MANAGEMENT LLC $38,414,134 2.29% 1,209,894
Trails Edge Capital Partners, LP $33,757,679 2.01% 1,063,234
BlackRock, Inc. $31,895,984 1.90% 1,004,598
Point72 Asset Management, L.P. $31,441,390 1.88% 990,280
PRICE T ROWE ASSOCIATES INC /MD/ $26,386,409 1.57% 831,068
Jupiter Topco LLC $22,511,448 1.34% 709,022
Logos Global Management LP $19,050,000 1.14% 600,000
MARSHALL WACE, LLP $18,762,376 1.12% 590,941
Hudson Bay Capital Management LP $18,732,500 1.12% 590,000
CITADEL ADVISORS LLC $17,994,661 1.07% 566,761
BRAIDWELL LP $16,552,132 0.99% 521,327
Jones Hill Capital LP $16,283,178 0.97% 512,856
PRINCIPAL FINANCIAL GROUP INC $15,423,800 0.92% 485,789
Frazier Life Sciences Management, L.P. $15,391,828 0.92% 484,782
Fulcrum Asset Management LLP $14,923,293 0.89% 470,025
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $12,929,203 0.77% 407,219
D. E. Shaw & Co., Inc. $12,862,433 0.77% 405,116
Candriam S.C.A. $11,844,210 0.71% 373,046
CANTOR FITZGERALD, L. P. $10,798,175 0.64% 340,100
Woodline Partners LP $10,057,193 0.60% 316,762
Deep Track Capital, LP $9,881,171 0.59% 311,218
Legal & General Group Plc $9,514,522 0.57% 299,670
BOOTHBAY FUND MANAGEMENT, LLC $9,383,585 0.56% 295,546
MOORE CAPITAL MANAGEMENT, LP $8,720,550 0.52% 274,663
DIADEMA PARTNERS LP $8,091,900 0.48% 254,863
JANE STREET GROUP, LLC $7,408,798 0.44% 233,348
Qube Research & Technologies Ltd $7,084,187 0.42% 223,124
MORGAN STANLEY $5,964,235 0.36% 187,850
SUSQUEHANNA INTERNATIONAL GROUP, LLP $5,889,625 0.35% 185,500
Caption Management, LLC $5,495,925 0.33% 173,100
Caption Management, LLC $5,476,970 0.33% 172,503
Catalio Capital Management, LP $4,700,428 0.28% 148,045
GOLDMAN SACHS GROUP INC $4,360,100 0.26% 137,326
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $4,259,738 0.25% 134,165
Jump Financial, LLC $4,189,380 0.25% 131,949
BANK OF AMERICA CORP /DE/ $3,687,572 0.22% 116,144
XTX Topco Ltd $3,687,286 0.22% 116,135
TD Asset Management Inc $3,287,966 0.20% 103,558
RENAISSANCE TECHNOLOGIES LLC $3,251,200 0.19% 102,400
STATE STREET CORP $3,118,770 0.19% 98,229
Y-Intercept (Hong Kong) Ltd $2,953,729 0.18% 97,515
BNP PARIBAS ASSET MANAGEMENT Holding S.A. $2,887,630 0.17% 90,949
Elmind Capital, LP $2,576,290 0.15% 81,143
Quadrature Capital Ltd $2,347,214 0.14% 73,928
Trexquant Investment LP $2,312,860 0.14% 72,846
JANE STREET GROUP, LLC $2,225,675 0.13% 70,100
MANUFACTURERS LIFE INSURANCE COMPANY, THE $2,150,681 0.13% 67,738
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO $2,144,966 0.13% 67,558
CITADEL ADVISORS LLC $2,136,775 0.13% 67,300
Persistent Asset Partners Ltd $2,070,544 0.12% 65,214
SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,070,100 0.12% 65,200
Engineers Gate Manager LP $1,915,382 0.11% 60,327
Caption Management, LLC $1,905,000 0.11% 60,000
HRT FINANCIAL LP $1,802,987 0.11% 56,787
J. Goldman & Co LP $1,696,402 0.10% 53,430
ALPS ADVISORS INC $1,632,585 0.10% 51,420
Susquehanna Portfolio Strategies, LLC $1,561,433 0.09% 49,179
Eagle Health Investments LP $1,470,025 0.09% 46,300
GEODE CAPITAL MANAGEMENT, LLC $1,459,674 0.09% 45,974
HighVista Strategies LLC $1,371,123 0.08% 43,185
Hennion & Walsh Asset Management, Inc. $1,359,354 0.08% 44,878
Virtus Investment Advisers, LLC $1,274,921 0.08% 40,155
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS $1,255,141 0.07% 39,532
SEI INVESTMENTS CO $1,245,012 0.07% 39,213
Bridgewater Associates, LP $1,165,447 0.07% 36,707
Crossmark Global Holdings, Inc. $1,156,208 0.07% 36,416
Brevan Howard Capital Management LP $1,093,787 0.07% 34,450
State of New Jersey Common Pension Fund D $1,088,231 0.06% 34,275
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,084,897 0.06% 34,170
NEW YORK STATE COMMON RETIREMENT FUND $1,078,928 0.06% 33,982
Tidal Investments LLC $979,455 0.06% 30,849
CITIGROUP INC $952,500 0.06% 30,000
CITIGROUP INC $952,500 0.06% 30,000
BARCLAYS PLC $937,164 0.06% 29,517
EntryPoint Capital, LLC $724,376 0.04% 22,815
Cinctive Capital Management LP $695,452 0.04% 21,904
CITIGROUP INC $683,069 0.04% 21,514
BNP PARIBAS ARBITRAGE, SA $603,218 0.04% 18,999
CITADEL ADVISORS LLC $568,325 0.03% 17,900
Aquatic Capital Management LLC $558,260 0.03% 17,583
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $540,988 0.03% 17,039
Virtu Financial LLC $538,734 0.03% 16,968
PSP Research LLC $480,726 0.03% 15,141
UBS Group AG $415,956 0.02% 13,101
Entropy Technologies, LP $403,860 0.02% 12,720
Federation des caisses Desjardins du Quebec $403,542 0.02% 12,710
Squarepoint Ops LLC $372,935 0.02% 11,746

Showing the top 100 of 144 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1671927 CUSIP 45258D105 13F (30d) 8 filings 8 filers Visit website Investor relations