Vault-13

HELIX ACQUISITION CORP III HLXC

USD CL A ORD SHS · Common Stock · CUSIP G4444S107

40 institutional holders -3 vs Q1 2026
18,775,83418.8m shares reported held*
$199.6mreported value*
0 new 8 added 10 reduced 3 sold out net bought ≈ $9.5m (+891.3k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $10.63.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q1 26: 43Q2 26: 4040Q1 26Q2 26
Numbers
QuarterHolders
Q1 202643
Q2 202640

Biggest buyers

Nantahala Capital Management, LLC Added +1,250,000+1.2m
Decagon Asset Management LLP Added +245,875+245.9k
J. Goldman & Co LP Added +175,000+175.0k
Periscope Capital Inc. Added +84,232+84.2k
Sculptor Capital LP Added +77,890+77.9k
MILLENNIUM MANAGEMENT LLC Added +10,172+10.2k
Radcliffe Capital Management, L.P. Added +3,474+3.5k
MORGAN STANLEY Added +22+22

Biggest sellers

STEMPOINT CAPITAL LP Reduced -438,385-438.4k
TORONTO DOMINION BANK Reduced -248,820-248.8k
Monashee Investment Management LLC Sold out -137,113-137.1k
UBS Group AG Sold out -44,427-44.4k
SILVERARC CAPITAL MANAGEMENT, LLC Reduced -31,165-31.2k
Shaolin Capital Management LLC Reduced -24,725-24.7k
Meteora Capital, LLC Sold out -11,670-11.7k
JPMORGAN CHASE & CO Reduced -7,391-7.4k
Schonfeld Strategic Advisors LLC Reduced -5,300-5.3k
HRT FINANCIAL LP Reduced -2,803-2.8k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Helix Holdings III LLC 13D · may seek influence new · filed 2026-01-30
Stated purposeFounder Shares On November 20, 2025, the Sponsor paid $25,000, or approximately $0.006 per share, to cover certain of the Issuer's offering and formation costs in exchange for 4,312,500 Class B ordinary shares, par value $0.0001 per share, of the Issuer (the "Class B ordinary shares" or the "founder shares"). On December 1, 2025, the Sponsor surrendered 718,750 founder shares to the Issuer for no consideration, resulting in the Sponsor holding a total of 3,593,750 founder shares. On December 4, 2025, the Sponsor transferred 30,000 founder shares to each of the Issuer's nominated independent directors, Mark McKenna and John Schmid, resulting in the Sponsor holding a total of 3,533,750 founder shares. On January 22, 2026, the Issuer effected a share capitalization with respect to the Class … Full filing
 25.2% new 5.5m≈ $59.1m 2026-01-30
Nantahala Capital Management, LLC 13G · institution new · filed 2026-05-15 8.3% new 1.2m≈ $13.3m 2026-05-15
Affinity Asset Advisors, LLC 13G · institution new · filed 2026-05-14 7.0% new 1.2m≈ $13.3m 2026-05-14
RA CAPITAL MANAGEMENT, L.P. 13G · passive investor new · filed 2026-02-02 7.0% new 1.2m≈ $13.3m 2026-02-02
SILVERARC CAPITAL MANAGEMENT, LLC 13G · institution new · filed 2026-05-13 6.8% new 1.2m≈ $12.9m 2026-05-13
ADAR1 Capital Management, LLC 13G · institution new · filed 2026-05-15 5.6% new 1.0m≈ $10.6m 2026-05-15
Sculptor Capital LP 13G · passive investor new · filed 2026-10-13 5.2% new 928.6k≈ $9.9m 2026-10-13

Fell to 5% or below in the last year: INTEGRATED CORE STRATEGIES (US) LLC (4.8%, 2026-05-04)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
101Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 1 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—0——
Q1 20261$8.0m0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Nantahala Capital Management, LLC 0.81% of their portfolio NEW CANAAN, CT 2,500,0002.5m $26.6m $26.6m 0.81% Added +1.2m +1,250,000
2 Cormorant Asset Management, LP 0.71% of their portfolio BOSTON, MA 1,297,5001.3m $13.8m $13.8m 0.71% Unchanged
3 RA CAPITAL MANAGEMENT, L.P. 0.12% of their portfolio BOSTON, MA 1,250,0001.2m $13.3m $13.3m 0.12% Unchanged
4 Affinity Asset Advisors, LLC 0.65% of their portfolio NEW YORK, NY 1,250,0001.2m $13.3m $13.3m 0.65% Unchanged
5 SILVERARC CAPITAL MANAGEMENT, LLC 1.39% of their portfolio BOSTON, MA 1,177,8211.2m $12.5m $12.5m 1.39% Reduced -31.2k -31,165
6 Decagon Asset Management LLP 2.22% of their portfolio LONDON, X0 1,044,7661.0m $11.1m $11.1m 2.22% Added +245.9k +245,875
7 ADAR1 Capital Management, LLC 0.50% of their portfolio AUSTIN, TX 1,000,0001.0m $10.6m $10.6m 0.50% Unchanged
8 Balyasny Asset Management L.P. 0.02% of their portfolio Chicago, IL 990,000990.0k $10.5m $10.5m 0.02% Unchanged
9 BRAIDWELL LP 0.35% of their portfolio STAMFORD, CT 900,000900.0k $9.5m $9.5m 0.35% Unchanged
10 Sculptor Capital LP 0.10% of their portfolio New York, NY 872,563872.6k $9.3m $9.3m 0.10% Added +77.9k +77,890
11 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 865,893865.9k $9.2m $9.2m 0.01% Added +10.2k +10,172
12 J. Goldman & Co LP 0.27% of their portfolio NEW YORK, NY 725,000725.0k $7.7m $7.7m 0.27% Added +175.0k +175,000
13 TORONTO DOMINION BANK 0.01% of their portfolio TORONTO, ONTARIO, A6 625,000625.0k $6.7m $6.7m 0.01% Reduced -248.8k -248,820
14 Commodore Capital LP 0.32% of their portfolio NEW YORK, NY 500,000500.0k $5.3m $5.3m 0.32% Unchanged
15 Spruce Street Capital LP 1.04% of their portfolio NEW YORK, NY 500,000500.0k $5.3m $5.3m 1.04% Unchanged
16 SONA ASSET MANAGEMENT (US) LLC 0.14% of their portfolio NEW YORK, NY 350,000350.0k $3.7m $3.7m 0.14% Unchanged
17 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 271,875271.9k $2.9m $2.9m 0.00% Unchanged
18 Longaeva Partners L.P. 0.08% of their portfolio Chicago, IL 246,709246.7k $2.6m $2.6m 0.08% Reduced -791 -791
19 BERKLEY W R CORP 0.12% of their portfolio Greenwich, CT 223,830223.8k $2.4m $2.4m 0.12% Unchanged
20 Laurion Capital Management LP 0.15% of their portfolio NEW YORK, NY 200,000200.0k $2.1m $2.1m 0.15% Unchanged
21 EcoR1 Capital, LLC 0.11% of their portfolio San Francisco, CA 200,000200.0k $2.1m $2.1m 0.11% Unchanged
22 ExodusPoint Capital Management, LP 0.02% of their portfolio NEW YORK, NY 200,000200.0k $2.1m $2.1m 0.02% Unchanged
23 READYSTATE ASSET MANAGEMENT LP 0.09% of their portfolio CHICAGO, IL 199,974200.0k $2.1m $2.1m 0.09% Reduced -26 -26
24 DLD Asset Management, LP 0.17% of their portfolio NEW YORK, NY 194,846194.8k $2.1m $2.1m 0.17% Unchanged
25 Radcliffe Capital Management, L.P. 0.14% of their portfolio BALA CYNWYD, PA 173,974174.0k $1.9m $1.9m 0.14% Added +3.5k +3,474
26 STEMPOINT CAPITAL LP 0.32% of their portfolio NEW YORK, NY 171,671171.7k $1.8m $1.8m 0.32% Reduced -438.4k -438,385
27 RLH Capital LLC 0.76% of their portfolio Great Neck, NY 150,000150.0k $1.6m $1.6m 0.76% Unchanged
28 Periscope Capital Inc. 0.24% of their portfolio Toronto, A6 141,780141.8k $1.5m $1.5m 0.24% Added +84.2k +84,232
29 First Trust Capital Management L.P. 0.07% of their portfolio CHICAGO, IL 118,000118.0k $1.3m $1.3m 0.07% Unchanged
30 Shaolin Capital Management LLC 0.06% of their portfolio Miami, FL 100,275100.3k $1.1m $1.1m 0.06% Reduced -24.7k -24,725
31 MOORE CAPITAL MANAGEMENT, LP 0.02% of their portfolio NEW YORK, NY 100,000100.0k $1.1m $1.1m 0.02% Unchanged
32 Quarry LP 0.17% of their portfolio NEW YORK, NY 100,000100.0k $1.1m $1.1m 0.17% Unchanged
33 ABC ARBITRAGE SA 0.03% of their portfolio PARIS, I0 30,00030.0k $319.2k $319.2k 0.03% Unchanged
34 Clear Street Group Inc. 0.00% of their portfolio NEW YORK, NY 25,49725.5k $271.3k $271.3k 0.00% Unchanged
35 DELTEC ASSET MANAGEMENT LLC 0.04% of their portfolio New York, NY 25,00025.0k $266.0k $266.0k 0.04% Unchanged
36 Schonfeld Strategic Advisors LLC 0.00% of their portfolio NEW YORK, NY 20,00020.0k $212.8k $212.8k 0.00% Reduced -5.3k -5,300
37 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 12,56312.6k $131.9k $131.9k 0.00% Reduced -7.4k -7,391
38 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 10,67110.7k $113.0k $113.0k 0.00% Reduced -2.8k -2,803
39 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 10,59810.6k $112.3k $112.3k 0.00% Reduced -2.7k -2,704
40 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 2828 $298 $298 0.00% Added +22 +22