IFRX · InflaRx N.V. · Holdings

$1.51 -0.02 (-1.31%)

Market Cap

$225.47M

147.37M

Volume · Oct 23 584 Avg daily vol (3M) 784.74K

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 IFRX: 13F, 13D and 13G, insiders and funds →

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.

Quarter:

Holders: 64

Total Value: $212,447,299

Total Shares: 94,980,010

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 62 13F filers

Top Holder

24.2%

of institutional value

Top 5

61.5%

of institutional value

Top 10

80.2%

of institutional value

HHI

1,094

Broadly held

Who Holds IFRX

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: 62 filers, like-for-like change +400.4%; actively managed books +429.5%; index-like books -21.3%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	63.9%	28	+331.9%	12	2
Exempt adviser	4.1%	4	+600.1%	3	0
Adviser	3.9%	3	new	3	0
Bank	0.1%	4	-95.7%	1	1
Non-US	0.2%	2	+1239.1%	1	0
Holding company	10.4%	3	+738.3%	2	0
Broker-dealer	0.0%	0	—	0	0
Unknown	17.4%	18	+1330.9%	8	0

Style	Share	Filers	Change	New	Exited
Index-like	1.0%	2	-21.3%	0	0
Systematic-like	3.8%	8	+712.3%	4	1
Concentrated	19.1%	8	+11103.1%	5	0
Diversified active	76.0%	44	+321.3%	21	2
Not measured	0.0%	0	—	0	0
Unknown	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	29.8%	21	+608.9%	7	2
Medium turnover	45.8%	12	+225.5%	4	0
High turnover	13.2%	23	+846.4%	16	1
Unknown	11.2%	6	+3410.8%	3	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	18.7%	14	+3303.1%	10	1
Medium horizon	27.7%	10	+4419.3%	6	0
Long horizon	19.0%	29	+348.1%	12	2
Unknown	34.7%	9	+137.5%	2	0
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	18.6%	16	+3595.8%	11	0
$1B to $10B	57.8%	12	+305.7%	5	1
$10B to $100B	7.6%	14	+1448.7%	6	1
$100B or more	16.1%	20	+238.5%	8	1
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	0.1%	7	+21.1%	0	1
Pooled investment vehicles	61.6%	17	+321.0%	10	1
Registered funds and BDCs	0.1%	2	+97.2%	1	0
Corporations	0.1%	1	0.0%	0	0
Pension and profit sharing plans	0.0%	0	—	0	0
Unknown	38.2%	35	+636.7%	19	1

Private funds	Share	Filers	Change	New	Exited
Hedge funds	61.5%	20	+304.5%	12	1
Private equity funds	3.3%	2	+5056.5%	1	0
Other private funds	3.1%	1	new	1	0
Private funds, type not stated	0.0%	1	new	1	0
No private funds	0.1%	8	+12.4%	0	1
Unknown	32.0%	30	+595.3%	15	1

Location	Share	Filers	Change	New	Exited
United States	98.1%	52	+412.8%	24	2
Outside the US	1.9%	10	+125.2%	6	1

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.

Conviction and Crowding

62 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

0.000% of filers hold it in their top 10

Mar 31, 2026: 0

Holders above 5%

median weight 0.001%

Mar 31, 2026: 0

Crowding

—

a foreign private issuer reports ordinary shares, a different unit from the listed shares

Private-fund advisers

—

of shares outstanding

Institutional ownership

—

a foreign private issuer reports ordinary shares, a different unit from the listed shares

Top 10 holders

80.4%

of 13F shares, Herfindahl 0.110

Active holders

+429.5%

like-for-like share change of active filers

5% stakes on record

0 13D, 5 13G (2 institutional, 3 passive, 0 exempt)

How long holders have held it value-weighted 7.3 quarters

Under 1 year 66.1% 1 to 3 years 1.73% 3 years or more 32.2% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $10,057,384 (1 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

$2.05

estimated per share

Mar 31, 2026: $2.70

Quarter-end price

$2.24

implied by 13F values

Estimated gain or loss

+9.4%

price against the estimated cost

Estimated at a loss

26.2%

of costed 13F value

Estimated cost covers 98.3% 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 IFRX's active holders also own, quarter ended Jun 30, 2026

#	Company	Shared holders	Similarity
1	JATT JATT II Acquisition Corp.	6	0.433
2	LONA LeonaBio, Inc.	5	0.377
3	SRZN Surrozen, Inc.	5	0.377
4	LBRX Lb Pharmaceuticals Inc	6	0.320
5	ALEC Alector, Inc.	5	0.295
6	BHVN Biohaven Ltd.	7	0.288
7	ENTA Enanta Pharmaceuticals Inc	3	0.283
8	ZURA Zura Bio Ltd	5	0.273
9	IKT Inhibikase Therapeutics, Inc.	5	0.273
10	WHWK Whitehawk Therapeutics, Inc.	4	0.267

Shareholder Targets

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

Found through its holder-overlap peers: JATT, LONA, SRZN, LBRX, ALEC, BHVN, ENTA, ZURA, IKT, WHWK, AMLX, CTNM, RACC, ASMB, RLMD, LXEO, ZLAB, ELVN, EYPT, EDIT. 594 filers in all.

#	Filer	In peers	Of book	Largest peers
1	BlackRock, Inc. Holding company, Index-like	$1,071,737,211 18 held	0.020%	ELVN, BHVN, AMLX
2	Jupiter Topco LLC Unknown, Diversified active	$533,739,051 12 held	0.220%	BHVN, AMLX, RLMD
3	VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like	$473,389,697 17 held	0.010%	ELVN, AMLX, EYPT
4	ORBIMED ADVISORS LLC Registered adviser, Diversified active	$424,020,925 6 held	8.39%	ELVN, RLMD, LXEO
5	STATE STREET CORP Bank, Index-like	$351,105,358 18 held	0.010%	BHVN, ELVN, AMLX
6	Polar Capital Holdings Plc Registered adviser, Diversified active	$335,630,538 2 held	0.950%	ELVN, RLMD
7	RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated	$266,603,595 6 held	2.35%	ZLAB, LBRX, EDIT
8	Vestal Point Capital, LP Registered adviser, Diversified active	$237,942,100 4 held	5.56%	ELVN, LXEO, SRZN
9	ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active	$232,639,077 9 held	0.330%	EYPT, ELVN, AMLX
10	GOLDMAN SACHS GROUP INC Holding company, Index-like	$225,859,861 17 held	0.020%	AMLX, ZLAB, BHVN

Fund Ownership of IFRX by Fund Type

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

Index funds and index ETFs hold 0.00% of shares outstanding.

Fund type	Of shares outstanding	Shares	Funds
Index funds	0.00%	1,363	1
Index ETFs	0.00%	0	0
Active ETFs	0.00%	0	0
Active funds	0.02%	23,128	1
Unclassified	0.00%	0	0
All registered funds	0.02%	24,491	2

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 30 Exempt adviser 4 Adviser 3 Bank 4 Non-US 2 Holding company 3 Unknown 18

Showing 69 of 69

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

SUVRETTA CAPITAL MANAGEMENT, LLC

$51,371,958

24.18%

22,933,910

TCG Crossover Management, LLC

$32,480,000

15.29%

14,500,000

FMR LLC

$18,285,883

8.61%

8,163,341

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	8,163,341	$18,285,883	100.0%	Defined

Commodore Capital LP

$16,352,000

7.70%

7,300,000

Spruce Street Capital LP

$11,988,923

5.64%

5,352,198

683 Capital Management, LLC

$11,345,600

5.34%

5,065,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
683 Capital Partners, LP	5,065,000	$11,345,600	100.0%	Defined

FARALLON CAPITAL MANAGEMENT LLC

$7,448,000

3.51%

3,325,000

STEMPOINT CAPITAL LP

$7,231,291

3.40%

3,228,255

GREAT POINT PARTNERS LLC

$6,824,287

3.21%

3,046,557

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JAY JEFFREY R joint	3,046,557	$6,824,287	100.0%	Defined

ADAR1 Capital Management, LLC

$6,720,000

3.16%

3,000,000

Kalehua Capital Management LLC

$6,491,002

3.06%

2,897,769

AMERIPRISE FINANCIAL INC

$5,763,069

2.71%

2,572,799

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	2,572,799	$5,763,069	100.0%	Defined

Woodline Partners LP

$4,716,288

2.22%

2,105,486

Squadron Capital Management LLC

$4,480,000

2.11%

2,000,000

Eversept Partners, LP

$2,921,114

1.37%

1,304,069

FRANKLIN RESOURCES INC

$2,320,904

1.09%

1,036,118

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FRANKLIN ADVISERS INC	1,036,118	$2,320,904	100.0%	Defined

MORGAN STANLEY

$2,050,975

0.97%

915,614

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	828,692	$1,856,270	90.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	86,922	$194,705	9.5%	Defined

Jefferies Financial Group Inc.

$1,736,781

0.82%

775,349

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jefferies Financial Services, Inc.	775,349	$1,736,781	100.0%	Defined

MARSHALL WACE, LLP

$1,593,303

0.75%

711,296

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	711,296	$1,593,303	100.0%	Other

MILLENNIUM MANAGEMENT LLC

$1,270,189

0.60%

567,049

RAYMOND JAMES FINANCIAL INC

$844,844

0.40%

377,163

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	69,659	$156,036	18.5%	Defined
Raymond James Financial Services Advisors, Inc.	307,504	$688,808	81.5%	Defined

T3 Companies, LLC

$792,000

0.37%

440,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T3 Global Trading, LLC	440,000	$792,000	100.0%	Sole

XTX Topco Ltd

$751,098

0.35%

335,312

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	335,312	$751,098	100.0%	Defined

Qube Research & Technologies Ltd

$601,030

0.28%

268,317

Verde Servicos Internacionais S.A.

$562,240

0.26%

251,000

DCF Advisers, LLC

$511,840

0.24%

228,500

SteelPeak Wealth, LLC

$419,232

0.20%

232,907

TWO SIGMA INVESTMENTS, LP

$405,704

0.19%

181,118

Squarepoint Ops LLC

$402,333

0.19%

179,613

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	179,613	$402,333	100.0%	Defined

Quadrature Capital Ltd

$348,131

0.16%

155,416

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	155,416	$348,131	100.0%	Other

MYDA Advisors LLC

$336,000

0.16%

150,000

JANE STREET GROUP, LLC

$320,826

0.15%

143,226

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	143,226	$320,826	100.0%	Defined

HRT FINANCIAL LP

$320,790

0.15%

143,210

CITADEL ADVISORS LLC

$312,009

0.15%

139,290

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	135,318	$303,112	97.1%	Defined
Held directly	3,972	$8,897	2.9%	Defined

BNP PARIBAS ARBITRAGE, SA

$295,317

0.14%

131,838

Kestra Advisory Services, LLC

$212,800

0.10%

95,000

JANE STREET GROUP, LLC

$208,768

0.10%

93,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	93,200	$208,768	100.0%	Defined

UBS Group AG

$177,256

0.08%

79,133

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	21,210	$47,510	26.8%	Defined
UBS Switzerland AG	56,749	$127,117	71.7%	Defined
UBS Securities LLC	1,174	$2,629	1.5%	Defined

SIMPLEX TRADING, LLC

$142,027

0.07%

63,405

INSIGNEO ADVISORY SERVICES, LLC

$134,960

0.06%

60,250

CITADEL ADVISORS LLC

$114,016

0.05%

50,900

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	50,900	$114,016	100.0%	Defined

Invesco Ltd.

$98,226

0.05%

43,851

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Capital Management LLC	43,851	$98,226	100.0%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$97,825

0.05%

43,672

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$95,836

0.05%

42,784

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	42,784	$95,836	100.0%	Other

FRED ALGER MANAGEMENT, LLC

$95,128

0.04%

42,468

Steward Partners Investment Advisory, LLC

$56,840

0.03%

25,375

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$45,248

0.02%

20,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	20,200	$45,248	100.0%	Other

AXQ CAPITAL, LP

$40,664

0.02%

18,154

China Universal Asset Management Co., Ltd.

$35,840

0.02%

16,000

Engineers Gate Manager LP

$34,489

0.02%

15,397

JANE STREET GROUP, LLC

$30,016

0.01%

13,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	13,400	$30,016	100.0%	Defined

CITADEL ADVISORS LLC

$28,672

0.01%

12,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	12,800	$28,672	100.0%	Defined

Pacifica Partners Inc.

$25,578

0.01%

14,210

Sanctuary Advisors, LLC

$24,640

0.01%

11,000

COMMONWEALTH EQUITY SERVICES, LLC

$24,192

0.01%

10,800

Concurrent Investment Advisors, LLC

$22,771

0.01%

12,651

SG Americas Securities, LLC

$22,635

0.01%

10,105

Axiom Investment Management LLC

$22,400

0.01%

10,000

Persistent Asset Partners Ltd

$8,303

0.00%

3,707

JPMORGAN CHASE & CO

$7,217

0.00%

3,222

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities plc	3,222	$7,217	100.0%	Defined

Tower Research Capital LLC (TRC)

$6,482

0.00%

2,894

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	2,894	$6,482	100.0%	Defined

NewEdge Advisors, LLC

$4,928

0.00%

2,200

WELLS FARGO & COMPANY/MN

$4,480

0.00%

2,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	2,000	$4,480	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$3,996

0.00%

1,784

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	1,784	$3,996	100.0%	Sole

CITIGROUP INC

$2,914

0.00%

1,301

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	1,301	$2,914	100.0%	Defined

Keating Financial Advisory Services, Inc.

$1,503

0.00%

671

Quarry LP

$1,485

0.00%

663

Caitong International Asset Management Co., Ltd

$185

0.00%

IFP Advisors, Inc

$18

0.00%

Key facts CIK 1708688 CUSIP N44821101 13F (30d) 5 filings 5 filers Visit website Investor relations