NRXP · NRX Pharmaceuticals, Inc.

$3.67 +0.22 (+6.23%) At close · Aug 25

Market Cap

$152.40M

43.30M

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.

Quarter:

Holders: 48

Total Value: $49,848,434

Total Shares: 12,187,886

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 48 13F filers · Δ vs Mar 31, 2026

Top Holder

33.6%

−22.9 pts

Top 5

69.4%

−11.7 pts

Top 10

86.9%

−5.1 pts

HHI

1,554

Moderately concentrated−1,835

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +15

Institutional value: +340.8%

Shares held: +129.6%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small B Group, Inc.	+1,091,767	4,091,767
Mega CITADEL ADVISORS LLC	+906,243	930,943
Mega UBS Group AG	+397,888	423,115
Small AdvisorShares Investments LLC	+238,551	659,018
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	+177,300	279,500

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid XTX Topco Ltd	−60,188	18,545
Mega JANE STREET GROUP, LLC	−43,034	137,618
Mid Virtu Financial LLC	−15,171	16,614
Mega ROYAL BANK OF CANADA	−509	2,000
Mega WELLS FARGO & COMPANY/MN	−350	2,000

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega VANGUARD CAPITAL MANAGEMENT LLC	1,618,159	$6,618,270
Mega AMERIPRISE FINANCIAL INC	928,728	$3,798,497
Large Balyasny Asset Management L.P.	893,864	$3,655,903
Large MARSHALL WACE, LLP	194,580	$795,831
Large HRT FINANCIAL LP	100,724	$411,961

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Small Headlands Technologies LLC	39,394	$83,909
Small AXQ CAPITAL, LP	33,211	$70,739
Large Schonfeld Strategic Advisors LLC	19,876	$42,335
Small SUMMIT SECURITIES GROUP LLC	1,135	$2,417
Mid GROUP ONE TRADING LLC	737	$1,569

Filter: New 20 Increased 17 Reduced 5 Sold out 5 Unchanged 6

Showing 52 of 52

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

B Group, Inc.

$16,735,327

33.57%

4,091,767

VANGUARD CAPITAL MANAGEMENT LLC

$6,618,270

13.28%

1,618,159

AMERIPRISE FINANCIAL INC

$3,798,497

7.62%

928,728

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	928,728	$3,798,497	100.0%	Defined

Balyasny Asset Management L.P.

$3,655,903

7.33%

893,864

CITADEL ADVISORS LLC

$2,781,375

5.58%

680,043

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	680,043	$2,781,375	100.0%	Defined

AdvisorShares Investments LLC

$2,695,383

5.41%

659,018

COMMONWEALTH EQUITY SERVICES, LLC

$1,858,569

3.73%

454,418

UBS Group AG

$1,730,539

3.47%

423,115

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	282,174	$1,154,091	66.7%	Defined
UBS Switzerland AG	20,580	$84,172	4.9%	Defined
UBS Europe SE	115,400	$471,986	27.3%	Defined
UBS Securities LLC	4,961	$20,290	1.2%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$1,286,955

2.58%

314,659

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

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	58,770	$240,369	18.7%	Defined
Held directly	255,889	$1,046,586	81.3%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$927,612

1.86%

226,800

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	226,800	$927,612	100.0%	Other

CITADEL ADVISORS LLC

$916,978

1.84%

224,200

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	224,200	$916,978	100.0%	Defined

BlackRock, Inc.

$901,681

1.81%

220,460

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

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	7,113	$29,092	3.2%	Sole
BlackRock Fund Advisors	104,969	$429,323	47.6%	Sole
BlackRock Institutional Trust Company, N.A.	108,378	$443,266	49.2%	Sole

MARSHALL WACE, LLP

$795,831

1.60%

194,580

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	194,580	$795,831	100.0%	Other

VANGUARD FIDUCIARY TRUST CO

$747,316

1.50%

182,718

JANE STREET GROUP, LLC

$486,783

0.98%

119,018

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	106,673	$436,292	89.6%	Defined
Jane Street Global Trading, LLC	12,345	$50,491	10.4%	Defined

Bleakley Financial Group, LLC

$479,413

0.96%

117,216

STATE STREET CORP

$474,783

0.95%

116,084

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

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	116,084	$474,783	100.0%	Defined

HRT FINANCIAL LP

$411,961

0.83%

100,724

NORTHERN TRUST CORP

$257,469

0.52%

62,951

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

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	62,951	$257,469	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$215,543

0.43%

52,700

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	52,700	$215,543	100.0%	Other

Chicago Partners Investment Group LLC

$189,726

0.38%

46,388

Quadrature Capital Ltd

$178,344

0.36%

43,605

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

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	43,605	$178,344	100.0%	Other

One Wealth Management Investment & Advisory Services, LLC

$177,133

0.36%

43,309

MORGAN STANLEY

$167,284

0.34%

40,901

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	5,176	$21,169	12.7%	Defined
MORGAN STANLEY SMITH BARNEY LLC	35,725	$146,115	87.3%	Defined

RENAISSANCE TECHNOLOGIES LLC

$157,874

0.32%

38,600

Global Retirement Partners, LLC

$136,197

0.27%

33,300

CITADEL ADVISORS LLC

$109,203

0.22%

26,700

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	26,700	$109,203	100.0%	Defined

TWO SIGMA INVESTMENTS, LP

$108,094

0.22%

26,429

TRUIST FINANCIAL CORP

$81,800

0.16%

20,000

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

Manager	Shares	Value (USD)	% of position	Discretion
Truist Advisory Services, Inc.	20,000	$81,800	100.0%	Defined

ExodusPoint Capital Management, LP

$78,969

0.16%

19,308

JANE STREET GROUP, LLC

$76,074

0.15%

18,600

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	18,600	$76,074	100.0%	Defined

XTX Topco Ltd

$75,849

0.15%

18,545

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	18,545	$75,849	100.0%	Defined

Virtu Financial LLC

$67,951

0.14%

16,614

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

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	16,614	$67,951	100.0%	Defined

Persistent Asset Partners Ltd

$66,773

0.13%

16,326

Ethos Financial Group, LLC

$65,031

0.13%

15,900

Cresset Asset Management, LLC

$61,350

0.12%

15,000

SJBENEN ADVISORY, LLC

$61,350

0.12%

15,000

Squarepoint Ops LLC

$53,848

0.11%

13,166

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

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	13,166	$53,848	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$50,327

0.10%

12,305

CITIGROUP INC

$24,507

0.05%

5,992

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	5,992	$24,507	100.0%	Defined

Vanguard Global Advisers, LLC

$23,611

0.05%

5,773

SBI Securities Co., Ltd.

$20,863

0.04%

5,101

Tower Research Capital LLC (TRC)

$15,885

0.03%

3,884

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

Manager	Shares	Value (USD)	% of position	Discretion
Tower Research Capital Investments LLC	539	$2,204	13.9%	Other
Latour Trading LLC (Latour)	3,345	$13,681	86.1%	Defined

WELLS FARGO & COMPANY/MN

$8,180

0.02%

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 CLEARING SERVICES, LLC	2,000	$8,180	100.0%	Defined

ROYAL BANK OF CANADA

$8,180

0.02%

2,000

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

Manager	Shares	Value (USD)	% of position	Discretion
RBC Dominion Securities Inc.	2,000	$8,180	100.0%	Defined

BARCLAYS PLC

$3,681

0.01%

900

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	900	$3,681	100.0%	Defined

OSAIC HOLDINGS, INC.

$2,454

0.00%

600

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

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	600	$2,454	100.0%	Defined

Avion Wealth

$1,202

0.00%

294

Caitong International Asset Management Co., Ltd

$274

0.00%

JPMORGAN CHASE & CO

$139

0.00%

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	34	$139	100.0%	Defined

Larson Financial Group LLC

$89

0.00%

Steward Partners Investment Advisory, LLC

0.00%

Key facts CIK 1719406 CUSIP 629444209 13F (30d) 46 filings 46 filers Visit website Investor relations