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KBON · Karbon Capital Partners Corp. · Holdings

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$10.08 +0.01 (+0.05%) At close · Oct 20
Rebalance outlook locked
Going-concern doubt — flagged Aug 13, 2026

Substantial doubt about the company's ability to continue as a going concern.

“As of June 30, 2026, the Company had limited cash available to fund its operating activities, and management's forecast indicates that existing working capital may not be sufficient to fund operations through the end of the Combination Period without obtaining additional financing or reducing expenditures. Accordingly, these conditions raise substantial doubt about the Company's ability to continue as a going concern within one year after the issuance of these unaudited condensed financial statements.”
View the 10-Q filed Aug 13, 2026
Market Cap
$443.45M
Shares
44.02M
Volume · Oct 20 21.44K Avg daily vol (3M) 134.2K

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 KBON: 13F, 13D and 13G, insiders and funds →
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
Holders: 59
Total Value: $327,586,023
Total Shares: 39,116,957

Institutional Ownership Trend

3 quarters

Holder Concentration

Across 59 13F filers · Δ vs Mar 31, 2026
Top Holder
8.3%
Dec 2025 → Jun 2026 · range 8.0% – 8.4%
−0.0 pts
Top 5
32.9%
Dec 2025 → Jun 2026 · range 32.8% – 33.0%
−0.1 pts
Top 10
51.7%
Dec 2025 → Jun 2026 · range 50.0% – 51.7%
+1.1 pts
HHI
380
Dec 2025 → Jun 2026 · range 364 – 380
Broadly held+8

Who Holds KBON

Last 3 quarters through Jun 30, 2026

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: 59 filers, like-for-like change +1.2%; actively managed books +1.2%; index-like books +73.7%.

Holder type Share Filers Change
Registered adviser 65.7% 28 +0.7%
Exempt adviser 2.8% 2 0.0%
Adviser 3.7% 2 -4.7%
Bank 2.9% 4 +12.9%
Benefit plan 0.5% 1 0.0%
Non-US 12.1% 5 0.0%
Holding company 0.0% 1 +43.8%
Unknown 12.3% 16 +5.5%
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.

Excluded 1 holder with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

48 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
1
2.08% of filers hold it in their top 10
Mar 31, 2026: 1
Holders above 5%
0
median weight 0.078%
Mar 31, 2026: 0
Crowding
—
the issuer has more than one class of common stock, so its count is the total across classes
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
the issuer has more than one class of common stock, so its count is the total across classes
Top 10 holders
60.0%
of 13F shares, Herfindahl 0.047
Active holders
+4.3%
like-for-like share change of active filers
5% stakes on record
2
0 13D, 2 13G (1 institutional, 1 passive, 0 exempt)
How long holders have held it value-weighted 2.0 quarters
Under 1 year 100.0% 1 to 3 years 0.000% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 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
$10.07
estimated per share
Mar 31, 2026: $10.07
Quarter-end price
$10.10
implied by 13F values
Estimated gain or loss
+0.3%
price against the estimated cost
Estimated at a loss
0.000%
of costed 13F value

Estimated cost covers 99.6% 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 KBON's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 EVOX Evolution Global Acquisition Corp 3
2 IACO Idea Acquisition Corp. 3
3 GCGR General Catalyst Global Resilience Merger Corp. 3
4 ARXS Arxis, Inc. 3
5 JENA JENA ACQUISITION Corp II 3
6 PAII Pyrophyte Acquisition Corp. II 3
7 FVAV Fortress Value Acquisition Corp. V 3
8 MAIR Madison Air Solutions Corp 3
9 OTGA OTG Acquisition Corp. I 3
10 QNT Quantinuum Inc. 3

Shareholder Targets

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

Found through its holder-overlap peers: EVOX, IACO, GCGR, ARXS, JENA, PAII, FVAV, MAIR, OTGA, QNT, NOVT, DLR, SPCX, GOOGL. 6,507 filers in all.

# Filer In peers
1 BlackRock, Inc. Holding company, Index-like $312,849,295,607 7 held
2 VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like $254,415,210,146 7 held
3 FMR LLC Holding company, Diversified active $186,425,028,355 7 held
4 STATE STREET CORP Bank, Index-like $159,027,470,448 6 held
5 GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like $98,475,635,370 9 held
6 Alphabet Inc. Unknown, Concentrated $94,176,237,970 1 held
7 Valor Management LLC Adviser, Concentrated $86,013,406,595 1 held
8 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $70,961,908,869 7 held
9 NORGES BANK Non-US, Index-like $60,269,482,754 7 held
10 PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active $60,187,661,444 7 held

Quarterly Activity

vs Mar 31, 2026
New
3
Increased
12
Decreased
12
Sold Out
4
Unchanged
31

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: -1
Institutional value: +0.9%
Shares held: +1.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open
Linden Advisors LP +412,822 1,787,821
TORONTO DOMINION BANK +324,785 806,700
Davidson Kempner Capital Management LP +187,500 937,500
Parallax Volatility Advisers, L.P. +107,538 145,948
Decagon Asset Management LLP +86,371 903,634

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open
Sculptor Capital LP −467,807 125,000
CITIGROUP INC −153,600 196,400
Jain Global LLC −112,215 187,500
METEORA CAPITAL, LLC −70,207 414,490
UBS Group AG −40,904 71

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open
K2 PRINCIPAL FUND, L.P. 185,685 $1,500,334
Sanctuary Advisors, LLC 42,199 $426,209
MIZUHO SECURITIES USA LLC 19,746 $199,434

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
EAGLE GLOBAL ADVISORS LLC 69,711 $710,355
RLH Capital LLC 40,000 $407,600
Quarry LP 20,000 $203,800
GEODE CAPITAL MANAGEMENT, LLC 11,366 $114,341
Filter: New 3 Increased 12 Reduced 12 Sold out 4 Unchanged 31
Holder type: Registered adviser 28 Exempt adviser 2 Adviser 2 Bank 4 Benefit plan 1 Non-US 5 Holding company 1 Unknown 16
Showing 100 of 100
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
ADAGE CAPITAL PARTNERS GP, L.L.C. $27,270,000 8.32% 2,700,000
Empyrean Capital Partners, LP $26,590,795 8.12% 2,632,752
Alberta Investment Management Corp $20,200,000 6.17% 2,000,000
Fort Baker Capital Management LP $15,147,535 4.62% 1,499,756
Linden Advisors LP $15,077,502 4.60% 1,492,822
Yaupon Capital Management LP $14,847,000 4.53% 1,470,000
MILLENNIUM MANAGEMENT LLC $13,685,500 4.18% 1,355,000
Governors Lane LP $11,110,000 3.39% 1,100,000
Blackstone Inc. KBONU $10,260,000 3.13% 1,000,000
Allianz Asset Management GmbH KBONU $10,260,000 3.13% 1,000,000
Magnetar Financial LLC $10,100,000 3.08% 1,000,000
Ghisallo Capital Management LLC $10,100,000 3.08% 1,000,000
Polar Asset Management Partners Inc. $7,575,000 2.31% 750,000
Davidson Kempner Capital Management LP $7,575,000 2.31% 750,000
Decagon Asset Management LLP $7,274,868 2.22% 720,284
PICTON MAHONEY ASSET MANAGEMENT $7,070,000 2.16% 700,000
TORONTO DOMINION BANK KBONU $6,418,656 1.96% 625,600
TWO SIGMA INVESTMENTS, LP $5,445,778 1.66% 539,186
BlueCrest Capital Management Ltd KBONU $5,130,000 1.57% 500,000
LMR Partners LLP KBONU $5,130,000 1.57% 500,000
HGC Investment Management Inc. KBONU $5,130,000 1.57% 500,000
MOORE CAPITAL MANAGEMENT, LP $5,050,000 1.54% 500,000
Verition Fund Management LLC $4,968,119 1.52% 491,893
MILLENNIUM MANAGEMENT LLC KBONU $4,867,344 1.49% 474,400
Periscope Capital Inc. $4,545,000 1.39% 450,000
METEORA CAPITAL, LLC $4,186,349 1.28% 414,490
HBK INVESTMENTS L P $4,040,040 1.23% 400,004
D. E. Shaw & Co., Inc. $4,040,000 1.23% 400,000
TENOR CAPITAL MANAGEMENT Co., L.P. $4,040,000 1.23% 400,000
Schonfeld Strategic Advisors LLC $4,012,467 1.22% 397,274
SONA ASSET MANAGEMENT (US) LLC $3,899,074 1.19% 386,047
Shaolin Capital Management LLC $3,613,780 1.10% 357,800
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS $3,535,000 1.08% 350,000
AQR Arbitrage LLC $3,198,094 0.98% 316,643
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND $2,777,500 0.85% 275,000
ARISTEIA CAPITAL, L.L.C. $2,309,870 0.71% 228,700
DLD Asset Management, LP $2,272,500 0.69% 225,000
Lineage Point Capital LP $2,222,000 0.68% 220,000
Radcliffe Capital Management, L.P. $2,199,668 0.67% 217,789
OMERS ADMINISTRATION Corp KBONU $2,052,800 0.63% 200,078
Mint Tower Capital Management B.V. $2,020,000 0.62% 200,000
CITIGROUP INC KBONU $2,015,064 0.62% 196,400
Clear Street Group Inc. KBONU $1,897,720 0.58% 184,963
BNP PARIBAS ARBITRAGE, SA $1,738,896 0.53% 172,168
Jain Global LLC $1,515,000 0.46% 150,000
K2 PRINCIPAL FUND, L.P. $1,500,334 0.46% 148,548
Clear Street Group Inc. $1,384,215 0.42% 137,051
JPMORGAN CHASE & CO $1,346,693 0.41% 133,336
TORONTO DOMINION BANK $1,262,500 0.39% 125,000
BOUSSARD & GAVAUDAN GESTION SAS $1,010,000 0.31% 100,000
HRT FINANCIAL LP KBONU $536,762 0.16% 52,316
GLAZER CAPITAL, LLC $444,379 0.14% 43,998
Sanctuary Advisors, LLC $426,209 0.13% 42,199
ABC ARBITRAGE SA $404,000 0.12% 40,000
Linden Advisors LP KBONU $205,200 0.06% 20,000
MIZUHO SECURITIES USA LLC $199,434 0.06% 19,746
Virtu Financial LLC $182,062 0.06% 18,026
SUSQUEHANNA INTERNATIONAL GROUP, LLP KBONU $156,813 0.05% 15,284
SUSQUEHANNA INTERNATIONAL GROUP, LLP $112,554 0.03% 11,144
UBS Group AG $717 0.00% 71
MORGAN STANLEY $232 0.00% 23
HBK INVESTMENTS L P KBONW — — 100,001
Alberta Investment Management Corp KBONW — — 500,000
Empyrean Capital Partners, LP KBONW — — 658,188
Fort Baker Capital Management LP KBONW — — 374,937
Radcliffe Capital Management, L.P. KBONW — — 36,548
Schonfeld Strategic Advisors LLC KBONW — — 84,938
Linden Advisors LP KBONW — — 274,999
DLD Asset Management, LP KBONW — — 56,249
Parallax Volatility Advisers, L.P. KBONW — — 145,948
Decagon Asset Management LLP KBONW — — 183,350
Clear Street Group Inc. KBONW — — 77,801
TORONTO DOMINION BANK KBONW — — 56,100
Yaupon Capital Management LP KBONW — — 367,499
ADAGE CAPITAL PARTNERS GP, L.L.C. KBONW — — 450,000
Governors Lane LP KBONW — — 275,000
Polar Asset Management Partners Inc. KBONW — — 191,000
SONA ASSET MANAGEMENT (US) LLC KBONW — — 9,925
Magnetar Financial LLC KBONW — — 250,000
BOUSSARD & GAVAUDAN GESTION SAS KBONW — — 25,000
ARISTEIA CAPITAL, L.L.C. KBONW — — 57,173
AQR Arbitrage LLC KBONW — — 80,994
BNP PARIBAS ARBITRAGE, SA KBONW — — 39,208
MILLENNIUM MANAGEMENT LLC KBONW — — 440,930
Periscope Capital Inc. KBONW — — 130,700
PICTON MAHONEY ASSET MANAGEMENT KBONW — — 175,000
MOORE CAPITAL MANAGEMENT, LP KBONW — — 125,000
Davidson Kempner Capital Management LP KBONW — — 187,500
Jain Global LLC KBONW — — 37,500
Verition Fund Management LLC KBONW — — 121,604
Sculptor Capital LP KBONW — — 125,000
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND KBONW — — 318,750
Mint Tower Capital Management B.V. KBONW — — 50,000
K2 PRINCIPAL FUND, L.P. KBONW — — 37,137
Shaolin Capital Management LLC KBONW — — 207,405
TENOR CAPITAL MANAGEMENT Co., L.P. KBONW — — 100,000
Lineage Point Capital LP KBONW — — 55,000
Walleye Capital LLC KBONW — — 177,282
D. E. Shaw & Co., Inc. KBONW — — 100,000
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS KBONW — — 82,500
Key facts CIK 2088749 CUSIP G5225W100