Vault-13

AMPERCAP ACQUISITION CO APMC

ORD SHS · Common Stock · CUSIP G0344N107

14 institutional holders
4,527,2014.5m shares reported held*
22.7% of all shares outstanding*
$43.0mreported value*

* 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. Shares outstanding: 20.0m as of 2026-08-13, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $9.51.

Biggest buyers

ADAGE CAPITAL PARTNERS GP, L.L.C. New +1,125,000+1.1m
Sculptor Capital LP New +1,021,965+1.0m
WOLVERINE ASSET MANAGEMENT LLC New +711,905+711.9k
Polar Asset Management Partners Inc. New +450,000+450.0k
Decagon Asset Management LLP New +351,990+352.0k
TWO SIGMA INVESTMENTS, LP New +226,562+226.6k
Verition Fund Management LLC New +207,996+208.0k
Clear Street Group Inc. New +175,926+175.9k
DELTEC ASSET MANAGEMENT LLC New +100,000+100.0k
StoneX Group Inc. New +67,030+67.0k

Biggest sellers

None

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
AmperSPAC LLC 13D · may seek influence new · filed 2026-06-11
Stated purposeFounder Shares On January 6, 2026, the Sponsor acquired an aggregate of 4,791,667 ordinary shares, for $25,000, or approximately $0.005 per share (including an aggregate of up to 625,000 shares subject to forfeiture depending on the extent to which the underwriters' over-allotment option is exercised) ("Founder Shares"), pursuant to the Securities Subscription Agreement dated as of January 6, 2026 between the Sponsor and the Issuer (the "Founder Share Purchase Agreement") as more fully described in Item 6 of this Section 13D, which information is incorporated by reference. On June 4, 2026, upon the consummation of the initial public offering ("IPO") of the Issuer and the third-party investors purchasing 127,500 private placement units from the Issuer, Sponsor transferred an aggregate of 1… Full filing
19.6% new 3.9m≈ $38.7m 2026-06-11
Magnetar Financial LLC 13G · institution new · filed 2026-08-13 8.1% new 1.2m≈ $11.9m 2026-08-13
Adage Capital Management, L.P. 13G · institution new · filed 2026-08-12 5.6% new 1.1m≈ $11.1m 2026-08-12
WOLVERINE ASSET MANAGEMENT LLC 13G · institution new · filed 2026-10-07 5.6% new 1.1m≈ $11.1m 2026-10-07
Sculptor Capital LP 13G · passive investor filed 2026-08-14 5.1% 1.0m≈ $10.1m 2026-08-14

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: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 1 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 20260—0——
Q2 20261$2.8m0——
Q3 20260—0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-06-10 Gutierrez Pier Alberto +2 Co-CEO, director Bought 34,912 $10.00 $349.1k34.9k shares +1%
2026-06-04 Gutierrez Pier Alberto +2 Co-CEO, director Bought 247,500 $10.00 $2.5m247.5k shares +7%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio Boston, MA 1,125,0001.1m $11.1m $11.1m 0.02% New
2 Sculptor Capital LP 0.10% of their portfolio New York, NY 1,021,9651.0m $10.1m $10.1m 0.10% New
3 WOLVERINE ASSET MANAGEMENT LLC 0.09% of their portfolio CHICAGO, IL 711,905711.9k $7.0m $7.0m 0.09% New
4 Polar Asset Management Partners Inc. 0.08% of their portfolio TORONTO, A6 450,000450.0k $4.5m $4.5m 0.08% New
5 Decagon Asset Management LLP 0.69% of their portfolio LONDON, X0 351,990352.0k $3.5m $3.5m 0.69% New
6 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 226,562226.6k $2.2m $2.2m 0.00% New
7 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 207,996208.0k $2.1m $2.1m 0.01% New
8 Clear Street Group Inc. 0.00% of their portfolio NEW YORK, NY 175,926175.9k $0 $0 0.00% New
9 DELTEC ASSET MANAGEMENT LLC 0.15% of their portfolio New York, NY 100,000100.0k $989.0k $989.0k 0.15% New
10 StoneX Group Inc. 0.03% of their portfolio NEW YORK, NY 67,03067.0k $662.9k $662.9k 0.03% New
11 HEIGHTS CAPITAL MANAGEMENT, INC 0.11% of their portfolio SAN FRANCISCO, CA 50,00050.0k $494.5k $494.5k 0.11% New
12 Logan Stone Capital, LLC 0.05% of their portfolio CHICAGO, IL 26,03026.0k $257.4k $257.4k 0.05% New
13 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 11,79711.8k $116.7k $116.7k 0.00% New
14 HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 1,0001.0k $9.9k $9.9k 0.00% New