ILLU · Illumination Acquisition Corp. I

$9.94 At close · Aug 17

Market Cap

$311.04M

31.29M

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: 51

Total Value: $194,203,042

Total Shares: 24,240,979

Institutional Ownership Trend

2 quarters

Holder Concentration

Across 51 13F filers · Δ vs Mar 31, 2026

Top Holder

9.4%

+0.6 pts

Top 5

29.6%

+1.8 pts

Top 10

50.2%

+2.8 pts

HHI

381

Broadly held+22

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +2

Institutional value: -6.4%

Shares held: +15.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid Magnetar Financial LLC	+616,660	2,466,660
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	+333,333	1,333,333
Mid Linden Advisors LP	+316,666	1,266,666
Mid Kryger Capital LLC	+315,554	1,320,563
Mid SONA ASSET MANAGEMENT (US) LLC	+299,998	1,199,998

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid Saba Capital Management, L.P.	−133,334	66,666
Mid Virtu Financial LLC	−11,446	75,693
Large OMERS ADMINISTRATION Corp	−500	799,500
Mega CITADEL ADVISORS LLC	−23	10,496
Micro Kepos Capital LP	−1	39,999

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega JPMORGAN CHASE & CO	500,000	$5,025,000
Large Clear Street Group Inc.	247,106	$2,092,875
Mid WOLVERINE ASSET MANAGEMENT LLC	159,279	$1,576,862
Mega D. E. Shaw & Co., Inc.	100,000	$990,000
Small RLH Capital LLC	50,000	$495,000

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid GLAZER CAPITAL, LLC	757,956	$7,518,923
Mid OAKTREE CAPITAL MANAGEMENT LP	750,000	$7,440,000
Small Mint Tower Capital Management B.V.	500,000	$4,960,000
Small DELTEC ASSET MANAGEMENT LLC	100,000	$992,000
Small Ionic Capital Management LLC	65,000	$644,800

Filter: New 8 Increased 29 Reduced 5 Sold out 6 Unchanged 9

Showing 81 of 81

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Magnetar Financial LLC

$18,314,950

9.43%

1,849,995

LMR Partners LLP ILLUU

$10,050,000

5.17%

1,000,000

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	1,000,000	$10,050,000	100.0%	Sole

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND

$9,900,000

5.10%

1,000,000

Kryger Capital LLC

$9,783,001

5.04%

988,182

Linden Advisors LP

$9,405,000

4.84%

950,000

SONA ASSET MANAGEMENT (US) LLC

$8,910,000

4.59%

900,000

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

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	900,000	$8,910,000	100.0%	Other

OMERS ADMINISTRATION Corp ILLUU

$8,034,975

4.14%

799,500

ARISTEIA CAPITAL, L.L.C. ILLUU

$7,711,013

3.97%

767,265

MILLENNIUM MANAGEMENT LLC

$6,930,000

3.57%

700,000

AQR Arbitrage LLC ILLUU

$6,394,654

3.29%

636,284

Verition Fund Management LLC

$6,187,500

3.19%

625,000

Shaolin Capital Management LLC

$5,962,581

3.07%

602,281

MOORE CAPITAL MANAGEMENT, LP

$5,940,000

3.06%

600,000

Alberta Investment Management Corp

$5,940,000

3.06%

600,000

TORONTO DOMINION BANK ILLUU

$5,025,000

2.59%

500,000

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	500,000	$5,025,000	100.0%	Defined

JPMORGAN CHASE & CO ILLUU

$5,025,000

2.59%

500,000

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 LLC	500,000	$5,025,000	100.0%	Defined

RIVERNORTH CAPITAL MANAGEMENT, LLC

$4,949,980

2.55%

499,998

Radcliffe Capital Management, L.P.

$4,941,921

2.54%

499,184

WHITEBOX ADVISORS LLC

$4,455,000

2.29%

450,000

TENOR CAPITAL MANAGEMENT Co., L.P.

$3,960,000

2.04%

400,000

Hudson Bay Capital Management LP

$3,775,820

1.94%

381,396

BNP PARIBAS ARBITRAGE, SA ILLUU

$3,759,112

1.94%

374,041

TWO SIGMA INVESTMENTS, LP

$3,588,750

1.85%

362,500

Lineage Point Capital LP ILLUU

$3,402,859

1.75%

338,593

BERKLEY W R CORP

$3,198,185

1.65%

323,049

PICTON MAHONEY ASSET MANAGEMENT

$2,969,970

1.53%

299,997

Context Capital Management, LLC

$2,772,000

1.43%

280,000

Periscope Capital Inc.

$2,740,320

1.41%

276,800

Polar Asset Management Partners Inc.

$2,475,000

1.27%

250,000

Centiva Capital, LP

$2,475,000

1.27%

250,000

MILLENNIUM MANAGEMENT LLC ILLUU

$2,010,000

1.03%

200,000

WOLVERINE ASSET MANAGEMENT LLC

$1,576,862

0.81%

159,279

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

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	159,279	$1,576,862	100.0%	Defined

Westchester Capital Management, LLC ILLUU

$1,507,498

0.78%

150,000

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

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	1,275	$12,813	0.8%	Sole
Virtus Investment Advisers, LLC	136,092	$1,367,724	90.7%	Other
Held directly	12,633	$126,961	8.4%	Sole

Clear Street Group Inc.

$1,329,678

0.68%

134,311

BlueCrest Capital Management Ltd ILLUU

$1,005,000

0.52%

100,000

DLD Asset Management, LP

$990,000

0.51%

100,000

D. E. Shaw & Co., Inc.

$990,000

0.51%

100,000

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.	100,000	$990,000	100.0%	Defined

Schonfeld Strategic Advisors LLC

$831,669

0.43%

84,007

Clear Street Group Inc. ILLUU

$763,197

0.39%

75,940

Virtu Financial LLC

$749,360

0.39%

75,693

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

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	75,693	$749,360	100.0%	Defined

MMCAP International Inc. SPC

$742,500

0.38%

75,000

Bulldog Investors, LLP

$742,470

0.38%

74,997

RLH Capital LLC

$495,000

0.25%

50,000

Kepos Capital LP

$395,990

0.20%

39,999

HEIGHTS CAPITAL MANAGEMENT, INC

$352,440

0.18%

35,600

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

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	35,600	$352,440	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP ILLUU

$301,500

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
SUSQUEHANNA SECURITIES, LLC	30,000	$301,500	100.0%	Other

ABC ARBITRAGE SA

$297,000

0.15%

30,000

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

Manager	Shares	Value (USD)	% of position	Discretion
ABC ARBITRAGE ASSET MANAGEMENT	30,000	$297,000	100.0%	Other

CITADEL ADVISORS LLC ILLUU

$105,484

0.05%

10,496

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	10,496	$105,484	100.0%	Defined

LONGFELLOW INVESTMENT MANAGEMENT CO LLC ILLUU

$39,526

0.02%

3,933

MORGAN STANLEY

$277

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	28	$277	100.0%	Defined

MMCAP International Inc. SPC ILLUW

—

25,000

Parallax Volatility Advisers, L.P. ILLUW

—

232,581

WHITEBOX ADVISORS LLC ILLUW

—

150,000

Kryger Capital LLC ILLUW

—

332,381

Magnetar Financial LLC ILLUW

—

616,665

Verition Fund Management LLC ILLUW

—

205,333

MOORE CAPITAL MANAGEMENT, LP ILLUW

—

199,999

Lineage Point Capital LP ILLUW

—

54,449

SONA ASSET MANAGEMENT (US) LLC ILLUW

—

299,998

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

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	299,998	$0	—	Other

DLD Asset Management, LP ILLUW

—

33,332

PICTON MAHONEY ASSET MANAGEMENT ILLUW

—

99,999

Hudson Bay Capital Management LP ILLUW

—

127,132

BERKLEY W R CORP ILLUW

—

107,683

Polar Asset Management Partners Inc. ILLUW

—

83,333

Alberta Investment Management Corp ILLUW

—

200,000

Saba Capital Management, L.P. ILLUW

—

66,666

Schonfeld Strategic Advisors LLC ILLUW

—

24,999

Centiva Capital, LP ILLUW

—

83,333

Bulldog Investors, LLP ILLUW

—

24,999

Periscope Capital Inc. ILLUW

—

75,600

UBS Group AG ILLUW

—

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	9	$0	—	Defined

TENOR CAPITAL MANAGEMENT Co., L.P. ILLUW

—

133,333

MILLENNIUM MANAGEMENT LLC ILLUW

—

233,333

RIVERNORTH CAPITAL MANAGEMENT, LLC ILLUW

—

166,666

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND ILLUW

—

333,333

HEIGHTS CAPITAL MANAGEMENT, INC ILLUW

—

11,801

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

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	11,801	$0	—	Other

TORONTO DOMINION BANK ILLUW

—

65,000

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	65,000	$0	—	Defined

Linden Advisors LP ILLUW

—

316,666

Shaolin Capital Management LLC ILLUW

—

200,760

Radcliffe Capital Management, L.P. ILLUW

—

166,393

Clear Street Group Inc. ILLUW

—

36,855

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

Manager	Shares	Value (USD)	% of position	Discretion
BROOKFIELD Corp /ON/ joint	750,000	$7,440,000	100.0%	Defined

Key facts CIK 2101135 CUSIP G470AU100 13F (30d) 52 filings 51 filers Visit website