ONEN · ONE Nuclear Energy Inc. · Holdings

$2.13 +0.26 (+13.90%) At close · Oct 5

Market Cap

$65.06M

26.02M

Volume · Oct 5 2.59M Avg daily vol (3M) 331.61K

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 →

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.

Quarter:

Holders: 69

Total Value: $195,699,360

Total Shares: 34,485,524

Institutional Ownership Trend

6 quarters

Holder Concentration

Across 69 13F filers · Δ vs Mar 31, 2026

Top Holder

9.0%

+0.2 pts

Top 5

37.3%

−1.7 pts

Top 10

61.6%

−0.7 pts

HHI

464

Broadly held−18

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +1

Institutional value: +0.9%

Shares held: -0.3%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid GLAZER CAPITAL, LLC	+300,084	1,029,743
Mid BERKLEY W R CORP	+219,214	1,196,423
Small Wealthspring Capital LLC	+184,085	1,034,482
Mid MIZUHO SECURITIES USA LLC	+158,155	421,750
Large Clear Street Group Inc.	+148,480	670,814

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Small K2 PRINCIPAL FUND, L.P.	−98,150	257,949
Large TORONTO DOMINION BANK	−82,344	477,087
Mid Shaolin Capital Management LLC	−60,756	489,244
Mid Periscope Capital Inc.	−52,433	293,740
Mid AQR Arbitrage LLC	−31,591	2,300,891

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Small SkyView Investment Advisors, LLC	201,320	$2,103,794
Small Stoic Point Capital Management LLC	50,000	$522,500
Mid StoneX Group Inc.	30,000	$313,500
Large Centiva Capital, LP	215,900	$166,155
Mega CITADEL ADVISORS LLC	10,635	$111,135

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid Aventail Capital Group, LP	1,452,081	$15,029,038
Large Schonfeld Strategic Advisors LLC	42,913	$141,939
Large Mirae Asset Global Investments Co., Ltd.	4,500	$46,575
Mega NATIONAL BANK OF CANADA /FI/	525	$5,433
Small T3 Companies, LLC	19,700	$0

Filter: New 6 Increased 11 Reduced 13 Sold out 5 Unchanged 39

Showing 98 of 98

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

HIGHBRIDGE CAPITAL MANAGEMENT LLC

$17,665,505

9.03%

1,690,479

TENOR CAPITAL MANAGEMENT Co., L.P.

$15,675,000

8.01%

1,500,000

Linden Advisors LP

$15,295,999

7.82%

1,463,732

Verbena Value LP

$12,777,633

6.53%

1,222,740

BERKLEY W R CORP

$11,510,392

5.88%

1,101,473

AQR Arbitrage LLC

$10,573,142

5.40%

1,011,784

GLAZER CAPITAL, LLC

$10,449,926

5.34%

999,993

D. E. Shaw & Co., Inc.

$9,828,225

5.02%

940,500

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

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	940,500	$9,828,225	100.0%	Defined

Crossingbridge Advisors, LLC

$9,825,319

5.02%

940,222

Magnetar Financial LLC

$6,949,250

3.55%

665,000

Radcliffe Capital Management, L.P.

$5,491,934

2.81%

525,544

RiverPark Advisors, LLC

$4,967,114

2.54%

475,322

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

Manager	Shares	Value (USD)	% of position	Discretion
Crossingbridge Advisors, LLC	475,322	$4,967,114	100.0%	Other

MIZUHO SECURITIES USA LLC

$4,407,287

2.25%

421,750

RIVERNORTH CAPITAL MANAGEMENT, LLC

$4,165,955

2.13%

398,656

GOLDMAN SACHS GROUP INC

$3,866,447

1.98%

369,995

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

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	369,995	$3,866,447	100.0%	Defined

Wealthspring Capital LLC

$3,694,513

1.89%

353,542

LMR Partners LLP

$3,657,500

1.87%

350,000

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

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	350,000	$3,657,500	100.0%	Sole

Sculptor Capital LP

$3,632,482

1.86%

347,606

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

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	347,606	$3,632,482	100.0%	Sole

METEORA CAPITAL, LLC

$3,135,000

1.60%

300,000

MOORE CAPITAL MANAGEMENT, LP

$3,135,000

1.60%

300,000

Qube Research & Technologies Ltd

$3,071,787

1.57%

293,951

TORONTO DOMINION BANK

$2,743,145

1.40%

262,502

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

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	262,502	$2,743,145	100.0%	Defined

Clear Street Group Inc.

$2,581,965

1.32%

247,078

SkyView Investment Advisors, LLC

$2,103,794

1.08%

201,320

WHITEBOX ADVISORS LLC

$2,090,000

1.07%

200,000

Brevan Howard Capital Management LP

$2,090,000

1.07%

200,000

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

Manager	Shares	Value (USD)	% of position	Discretion
Brevan Howard US Investment Management, LP	200,000	$2,090,000	100.0%	Defined

BANK OF AMERICA CORP /DE/

$2,090,000

1.07%

200,000

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

Manager	Shares	Value (USD)	% of position	Discretion
BOFA SECURITIES, INC.	200,000	$2,090,000	100.0%	Defined

GRITSTONE ASSET MANAGEMENT LLC

$2,068,044

1.06%

197,899

HRT FINANCIAL LP

$1,746,665

0.89%

167,145

PICTON MAHONEY ASSET MANAGEMENT

$1,567,500

0.80%

150,000

DLD Asset Management, LP

$1,532,670

0.78%

146,667

ARISTEIA CAPITAL, L.L.C.

$1,306,250

0.67%

125,000

Shaolin Capital Management LLC

$1,227,509

0.63%

117,465

Periscope Capital Inc.

$1,045,000

0.53%

100,000

CANTOR FITZGERALD, L. P.

$936,215

0.48%

89,590

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

Manager	Shares	Value (USD)	% of position	Discretion
Cantor Fitzgerald & Co.	89,590	$936,215	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$783,750

0.40%

75,000

HEIGHTS CAPITAL MANAGEMENT, INC

$627,000

0.32%

60,000

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

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	60,000	$627,000	100.0%	Other

Context Capital Management, LLC

$627,000

0.32%

60,000

Cannon Global Investment Management, LLC

$610,280

0.31%

58,400

WOLVERINE ASSET MANAGEMENT LLC

$591,804

0.30%

56,632

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

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	56,632	$591,804	100.0%	Defined

CSS LLC/IL

$542,355

0.28%

51,900

Stoic Point Capital Management LLC

$522,500

0.27%

50,000

K2 PRINCIPAL FUND, L.P.

$490,334

0.25%

46,922

Parallax Volatility Advisers, L.P.

$390,725

0.20%

37,390

StoneX Group Inc.

$313,500

0.16%

30,000

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

Manager	Shares	Value (USD)	% of position	Discretion
STONEX FINANCIAL INC.	30,000	$313,500	100.0%	Defined

Davidson Kempner Capital Management LP

$257,070

0.13%

24,600

GEODE CAPITAL MANAGEMENT, LLC

$232,397

0.12%

22,239

Centiva Capital, LP

$166,155

0.08%

15,900

Shay Capital LLC

$147,710

0.08%

14,135

ROBINSON CAPITAL MANAGEMENT, LLC

$128,012

0.07%

12,250

CITADEL ADVISORS LLC

$111,135

0.06%

10,635

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	10,635	$111,135	100.0%	Defined

Lineage Point Capital LP

$104,500

0.05%

10,000

BARCLAYS PLC

$104,500

0.05%

10,000

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	10,000	$104,500	100.0%	Defined

Arax Advisory Partners

$27,932

0.01%

2,673

FNY Investment Advisers, LLC

$12,122

0.01%

1,160

ROBINSON CAPITAL MANAGEMENT, LLC HVIIR

$3,806

0.00%

12,000

MORGAN STANLEY

$606

0.00%

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	58	$606	100.0%	Defined

GLAZER CAPITAL, LLC HVIIR

—

29,750

Polar Asset Management Partners Inc. HVIIR

—

500,000

CONDOR CAPITAL MANAGEMENT HVIIR

—

13,650

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

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	13,650	$0	—	Sole

Sculptor Capital LP HVIIR

—

700,000

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

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	700,000	$0	—	Sole

Wealthspring Capital LLC HVIIR

—

680,940

Verition Fund Management LLC HVIIR

—

600,985

UBS Group AG HVIIU

—

139

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	139	$0	—	Defined

Parallax Volatility Advisers, L.P. HVIIR

—

125,698

DLD Asset Management, LP HVIIR

—

156,484

PICTON MAHONEY ASSET MANAGEMENT HVIIR

—

200,000

Walleye Capital LLC HVIIR

—

149,884

Harraden Circle Investments, LLC HVIIR

—

825,362

LMR Partners LLP HVIIR

—

450,000

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

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	450,000	$0	—	Sole

AQR Arbitrage LLC HVIIR

—

1,289,107

Magnetar Financial LLC HVIIR

—

700,000

READYSTATE ASSET MANAGEMENT LP HVIIR

—

48,331

Lineage Point Capital LP HVIIR

—

74,000

Centiva Capital, LP HVIIR

—

200,000

K2 PRINCIPAL FUND, L.P. HVIIR

—

211,027

Saba Capital Management, L.P. HVIIR

—

175,000

Linden Advisors LP HVIIR

—

1,443,732

RIVERNORTH CAPITAL MANAGEMENT, LLC HVIIR

—

399,487

MOORE CAPITAL MANAGEMENT, LP HVIIR

—

300,000

SUSQUEHANNA INTERNATIONAL GROUP, LLP HVIIR

—

12,843

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

Manager	Shares	Value (USD)	% of position	Discretion
G1 EXECUTION SERVICES, LLC	12,843	$0	—	Other

GRITSTONE ASSET MANAGEMENT LLC HVIIR

—

197,900

Clear Street Group Inc. HVIIU

—

89,104

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND HVIIR

—

1,500,000

BERKLEY W R CORP HVIIR

—

94,950

D. E. Shaw & Co., Inc. HVIIR

—

850,000

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

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	850,000	$0	—	Defined

METEORA CAPITAL, LLC HVIIR

—

189,800

Periscope Capital Inc. HVIIR

—

193,740

TENOR CAPITAL MANAGEMENT Co., L.P. HVIIR

—

1,500,000

Clear Street Group Inc. HVIIR

—

334,632

WHITEBOX ADVISORS LLC HVIIR

—

200,000

Shaolin Capital Management LLC HVIIR

—

371,779

BNP PARIBAS ARBITRAGE, SA HVIIR

—

444,056

Context Capital Management, LLC HVIIR

—

187,500

Curi Capital, LLC HVIIR

—

27,560

Arax Advisory Partners HVIIR

—

4,650

MYDA Advisors LLC HVIIR

—

60,000

TORONTO DOMINION BANK HVIIR

—

214,585

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

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	214,585	$0	—	Defined

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