13F

Stock

Berto Acquisition Corp

Ticker not mapped · held by 61 managers

Reported value

$259.5M

Holders

61

+7 new · −8 exited

Holders’ est. mark

$2.23M

Price effect on 53 books still in the name

Largest holder

$18.7M

BERKLEY W R CORP

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
BERKLEY W R CORP1.82M$18.7M$112.7KAdded$8.29M
Centiva Capital, LP1.79M$18.4M$197KAdded$197K
Magnetar Financial LLC1.65M$16.9M$132KAdded$132K
Linden Advisors LP1.5M$15.4M$165KAdded$165K
Hudson Bay Capital Management LP1.27M$13M$139.3KAdded$139.3K
Polar Asset Management Partners Inc.1.1M$11.3M$99KAdded$99K
AQR Arbitrage LLC1.07M$11M$118.1KCut−$408.5K
MOORE CAPITAL MANAGEMENT, LP1M$10.3M$110KAdded$110K
WOLVERINE ASSET MANAGEMENT LLC899.9K$9.22M$3.68KAdded$8.88M
Verbena Value LP897.7K$9.2M$98.8KAdded$98.8K
TENOR CAPITAL MANAGEMENT Co., L.P.800K$8.2M$88KAdded$88K
TWO SIGMA INVESTMENTS, LP799.2K$8.19M$87.9KAdded$87.9K
LMR Partners LLP772.8K$7.92M$85KAdded$85K
Westchester Capital Management, LLC703.6K$7.21M$47.7KAdded$2.82M
Crossingbridge Advisors, LLC635K$6.51MNew
Parallax Volatility Advisers, L.P.631.4K$6.5MNew
HIGHBRIDGE CAPITAL MANAGEMENT LLC500K$5.11M$40KAdded$40K
Lineage Point Capital LP479.5K$4.91M$52.7KAdded$52.7K
GOLDMAN SACHS GROUP INC405.1K$4.15M$44.6KAdded$44.6K
Shaolin Capital Management LLC400K$4.1M$32.2KAdded$1.13M
Radcliffe Capital Management, L.P.371.8K$3.81M$38.2KAdded$287.1K
CSS LLC/IL364.9K$3.74M$40.1KAdded$40.1K
D. E. Shaw & Co., Inc.359.5K$3.68M$30.6KAdded$865.4K
First Trust Capital Management L.P.352K$3.61M$38.7KCut−$4.25M
MIZUHO SECURITIES USA LLC342K$3.46M$5.57KAdded$17.7K
ARISTEIA CAPITAL, L.L.C.337.6K$3.46M$37.1KAdded$37.1K
Logan Stone Capital, LLC323.9K$3.32M$34.8KAdded$113.3K
Periscope Capital Inc.275K$2.81M$17.5KAdded$836K
Mercuria Capital Strategies, LLC270.9K$2.78M$29.8KAdded$29.8K
BANK OF MONTREAL /CAN/260K$2.67M$31.2KCut−$2.54M
Alberta Investment Management Corp250K$2.56M$27.5KAdded$27.5K
Context Capital Management, LLC250K$2.56M$27.5KAdded$27.5K
K2 PRINCIPAL FUND, L.P.208.3K$2.14M$22.9KCut−$1.47M
Verition Fund Management LLC190.9K$1.96M$21KAdded$21K
Massar Capital Management, LP180K$1.84M$19.8KAdded$19.8K
RIVERNORTH CAPITAL MANAGEMENT, LLC173.9K$1.78M$19.1KAdded$19.1K
DLD Asset Management, LP168.8K$1.73M$18.6KAdded$18.6K
Schonfeld Strategic Advisors LLC167.9K$1.72M$12KAdded$611.4K
SONA ASSET MANAGEMENT (US) LLC165.6K$1.7MNew
Wealthspring Capital LLC148.8K$1.52M$16.4KCut−$1.44M
Jefferies Financial Group Inc.130.8K$1.34M$14.4KAdded$14.4K
Clear Street Group Inc.105.4K$1.08M$11.6KCut−$1.15M
BlueCrest Capital Management Ltd100K$1.02MNew
O'Connor Alternative Investments LLC100K$1.02MHeld
HEIGHTS CAPITAL MANAGEMENT, INC100K$1.02M$11KAdded$11K
GRITSTONE ASSET MANAGEMENT LLC98.9K$1.01M$10.9KAdded$10.9K
Citadel60.6K$621K$6.66KAdded$7.2K
GEODE CAPITAL MANAGEMENT, LLC57.4K$588.6K$6.32KCut−$31.5K
Diametric Capital, LP53.3K$546.7K$5.87KCut−$3.52K
BNP PARIBAS FINANCIAL MARKETS46K$471.6KNew
Cannon Global Investment Management, LLC41.7K$427.4K$4.07KAdded$52.2K
Tuttle Capital Management, LLC40K$410K$4.4KAdded$4.4K
TORONTO DOMINION BANK32.6K$334.3K$3.59KCut−$2.66M
ABC ARBITRAGE SA30K$307.5K$3.3KAdded$3.3K
READYSTATE ASSET MANAGEMENT LP18.4K$188.6K$2.02KAdded$2.02K
PRELUDE CAPITAL MANAGEMENT, LLC13.5K$138.4K$1.48KAdded$1.49K
LEVIN CAPITAL STRATEGIES, L.P.10K$102.5KNew
Glazer Capital, LLC1.58M$16.2K$159Added$1.48K
Mint Tower Capital Management B.V.410.7K$4.21K$45Added$45
MORGAN STANLEY22$226New
FNY Investment Advisers, LLC2.4K$24$0Cut−$2

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.