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Twin Securities, Inc.

SEC CIK
0001351351
Latest filing
Aug 14, 2026

Holdings in Q4 2022

Holdings as of Dec 31, 2022, filed Feb 14, 2023. Long positions only; changes compare share counts with Q3 2022.

Institution overview
Positions
14
−5 vs. Q3 2022
Portfolio value
$110.1M
−$97.1M (−46.9%) vs. Q3 2022
Filed
Feb 14, 2023
SEC
Holdings of Twin Securities, Inc. in Q4 2022
SecurityClassSharesValue% of portfolioShare changeActionHistory
HZNPHorizon Therapeutics Public Ltd CoSHS266,789$30.4M27.6%+266,789NewHistory
AAWWAtlas Air Worldwide Holdings IncCOM NEW215,170$21.7M19.7%+80,996+60.4%AddedHistory
LHCGLHC Group, IncCOM101,557$16.4M14.9%+101,557NewHistory
Shaw Communications Inc82028K200CL B CONV383,400$11.0M10.0%−413,503−51.9%Reduced–
SGFYSignify Health, Inc.CL A COM332,807$9.54M8.7%−62,052−15.7%ReducedHistory
ATVIActivision Blizzard, Inc.COM120,018$9.19M8.3%+30,934+34.7%AddedHistory
ONEM1Life Healthcare IncCOM220,000$3.68M3.3%+220,000NewHistory
VYXNCR Voyix CorpCOM77,962$1.82M1.7%−41,400−34.7%ReducedHistory
AJRDAerojet Rocketdyne Holdings, Inc.COM29,794$1.67M1.5%+29,794NewHistory
TSEMTower Semiconductor LtdSHS NEW33,287$1.44M1.3%+3,860+13.1%AddedHistory
Atlas CorpY0436Q109SHARES89,000$1.36M1.2%+89,000New–
Sierra Wireless Inc826516106COM45,000$1.30M1.2%+45,000New–
AAPLApple Inc.Stock2,500$325.0K0.3%+2,500NewHistory
TGNATegna IncCOM15,049$319.0K0.3%+15,049NewHistory

Options (1)

Puts and calls in the same filing. Amounts are the market value of the underlying shares, which is what 13F reports.

Option positions of Twin Securities, Inc. in Q4 2022
SecurityClassPutsCalls
HZNPHorizon Therapeutics Public Ltd CoSHS–$4.69M

Sold out since Q3 2022 (13)

Positions held at the end of Q3 2022 that are gone from this filing.

Positions of Twin Securities, Inc. sold out since Q3 2022
SecurityClassShares in Q3 2022Value in Q3 2022% of portfolio in Q3 2022History
ZENZendesk, Inc.COM721,132$54.9M26.5%History
GBTGlobal Blood Therapeutics, Inc.COM376,669$25.7M12.4%History
CHNGChange Healthcare Inc.COM923,194$25.4M12.2%History
TWTRTwitter, Inc.COM301,385$13.2M6.4%History
AVLRAvalara, Inc.COM121,589$11.2M5.4%History
BHVNBiohaven Ltd.COM55,000$8.31M4.0%History
NLSNNielsen Holdings plcSHS EUR256,722$7.12M3.4%History
Tenneco Inc880349105CL A VTG COM STK239,646$4.17M2.0%–
Ironsource LtdM5R75Y101CL A ORD SHS499,634$1.72M0.8%–
WBDWarner Bros. Discovery, Inc.Stock117,151$1.35M0.6%History
BHVNBiohaven Ltd.COM27,499$173.0K0.1%History
MNTVMomentive Global Inc.COM24,780$144.0K0.1%History
ScION Tech Growth IG31067120UNIT 12/17/202510,899$109.0K0.1%–