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Twin Securities, Inc.

SEC CIK
0001351351
Latest filing
Aug 14, 2026

Holdings in Q1 2023

Holdings as of Mar 31, 2023, filed May 15, 2023. Long positions only; changes compare share counts with Q4 2022.

Institution overview
Positions
8
−6 vs. Q4 2022
Portfolio value
$181.2M
+$71.1M (+64.5%) vs. Q4 2022
Filed
May 15, 2023
SEC
Holdings of Twin Securities, Inc. in Q1 2023
SecurityClassSharesValue% of portfolioShare changeActionHistory
Shaw Communications Inc82028K200CL B CONV2,541,656$76.0M41.9%+2,158,256+562.9%Added–
HZNPHorizon Therapeutics Public Ltd CoSHS380,201$41.5M22.9%+113,412+42.5%AddedHistory
NATINational Instruments CorpCOM765,243$40.1M22.1%+765,243NewHistory
LSILife Storage, Inc.COM64,595$8.47M4.7%+64,595NewHistory
OSHOak Street Health, Inc.COM206,892$8.00M4.4%+206,892NewHistory
FHNFirst Horizon CorpCOM334,113$5.94M3.3%+334,113NewHistory
VYXNCR Voyix CorpCOM26,916$635.0K0.4%−51,046−65.5%ReducedHistory
VMWVmware LLCCL A COM4,560$569.0K0.3%+4,560NewHistory

Options (2)

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 Q1 2023
SecurityClassPutsCalls
FHNFirst Horizon CorpCOM$311.0K–
NATINational Instruments CorpCOM–$210.0K

Sold out since Q4 2022 (11)

Positions held at the end of Q4 2022 that are gone from this filing.

Positions of Twin Securities, Inc. sold out since Q4 2022
SecurityClassShares in Q4 2022Value in Q4 2022% of portfolio in Q4 2022History
AAWWAtlas Air Worldwide Holdings IncCOM NEW215,170$21.7M19.7%History
LHCGLHC Group, IncCOM101,557$16.4M14.9%History
SGFYSignify Health, Inc.CL A COM332,807$9.54M8.7%History
ATVIActivision Blizzard, Inc.COM120,018$9.19M8.3%History
ONEM1Life Healthcare IncCOM220,000$3.68M3.3%History
AJRDAerojet Rocketdyne Holdings, Inc.COM29,794$1.67M1.5%History
TSEMTower Semiconductor LtdSHS NEW33,287$1.44M1.3%History
Atlas CorpY0436Q109SHARES89,000$1.36M1.2%–
Sierra Wireless Inc826516106COM45,000$1.30M1.2%–
AAPLApple Inc.Stock2,500$325.0K0.3%History
TGNATegna IncCOM15,049$319.0K0.3%History