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Twin Securities, Inc.

SEC CIK
0001351351
Latest filing
Aug 14, 2026

Holdings in Q2 2021

Holdings as of Jun 30, 2021, filed Aug 16, 2021. Long positions only; changes compare share counts with Q1 2021.

Institution overview
Positions
18
−1 vs. Q1 2021
Portfolio value
$264.6M
+$108.8M (+69.8%) vs. Q1 2021
Filed
Aug 16, 2021
SEC
Holdings of Twin Securities, Inc. in Q2 2021
SecurityClassSharesValue% of portfolioShare changeActionHistory
WORKSlack Technologies, Inc.COM CL A1,963,061$87.0M32.9%+587,193+42.7%AddedHistory
ALXNAlexion Pharmaceuticals, Inc.COM353,881$65.0M24.6%+124,999+54.6%AddedHistory
MXIMMaxim Integrated Products IncCOM616,245$64.9M24.5%+616,245NewHistory
XLNXXilinx IncCOM102,718$14.9M5.6%+92,976+954.4%AddedHistory
KSUKansas City SouthernCOM NEW44,738$12.7M4.8%+37,878+552.2%AddedHistory
PFPTProofpoint IncCOM55,867$9.71M3.7%+55,867NewHistory
GRAW R Grace & CoCOM55,227$3.82M1.4%+38,987+240.1%AddedHistory
WBTWelbilt, Inc.COM87,330$2.02M0.8%+87,330NewHistory
PRAHPRA Health Sciences, Inc.COM11,075$1.83M0.7%+11,075NewHistory
TGTXTG Therapeutics, Inc.COM17,500$679.0K0.3%00.0%UnchangedHistory
Foley Trasimene Acquistn Cor34431F112*W EXP 05/26/202256,560$534.0K0.2%+1,500+0.6%Added–
SPNVSpinnova PlcCOM CL A50,060$497.0K0.2%+20,060+66.9%AddedHistory
AAMCAltisource Asset Management CorpCOM24,781$477.0K0.2%−14,278−36.6%ReducedHistory
ACRSAclaris Therapeutics, Inc.COM12,500$220.0K0.1%+12,500NewHistory
CHP Merger Corp.12558Y106COM CL A11,708$116.0K<0.1%00.0%Unchanged–
ScION Tech Growth IG31067120UNIT 12/17/202510,899$110.0K<0.1%00.0%Unchanged–
Cohn Robbins Holdings CorpG23726105COM CL A10,000$99.0K<0.1%00.0%Unchanged–
Avanti Acquisition CorpG0682V109SHS CL A10,000$97.0K<0.1%00.0%Unchanged–

Sold out since Q1 2021 (6)

Positions held at the end of Q1 2021 that are gone from this filing.

Positions of Twin Securities, Inc. sold out since Q1 2021
SecurityClassShares in Q1 2021Value in Q1 2021% of portfolio in Q1 2021History
Realpage Inc75606N109COM362,253$31.6M20.3%–
Inphi Corp45772F107COM67,479$12.0M7.7%–
GW Pharmaceuticals PLC36197T103ADS39,541$8.58M5.5%–
Aphria Inc03765K104COM189,019$3.47M2.2%–
ALITAlight, Inc. / DelawareCOM CL A186,352$1.87M1.2%History
MRVLMarvell Technology, Inc.ORD13,400$656.0K0.4%History