Twin Securities, Inc.

All Holdings — 2026 Q1

AI Portfolio Summary
In 2026 Q1, Twin Securities, Inc. maintained a portfolio of 26 distinct positions. The most significant new addition to the portfolio was ARCELLX INC, which now represents 3.01% of the total fund value. They heavily accumulated shares in ELECTRONIC ARTS INC, increasing their position by 86.4%. Conversely, Twin Securities, Inc. completely exited their position in WARNER BROS DISCOVER.
PCA Score Concentration Risk
Risk ENB
Total Positions
26
Quarter
2026 Q1
Top Holding
EA (44.2%)
Top 10 Concentration
97.6%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-26 of 26
Stock History Sector / Type Port % Prev % Rank / Prev Conviction Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
EA
ELECTRONIC ARTS...
Communication Services 44.21% 18.73% #1 2
Prev: #3
9.0 207,112 86.4%
P
S
446,948 $91,119,289 2023 Q2 13F Filing 2026-03-31 2026-05-15
WBD
WARNER BROS DIS...
Communication Services 17.32% 12.28% #2 2
Prev: #4
7.5 184,926 16.6%
P
S
1,299,915 $35,695,666 2022 Q1 13F Filing 2026-03-31 2026-05-15
CWAN
CLEARWATER ANAL...
Technology 13.36% 0.45% #3 9
Prev: #12
8.0 1,114,776 2260.6%
P
S
1,164,090 $27,530,728 2025 Q4 13F Filing 2026-03-31 2026-05-15
HOLX
HOLOGIC INC
Healthcare 6.57% 2.41% #4 5
Prev: #9
6.1 94,523 111.8%
P
S
179,036 $13,533,331 2025 Q4 13F Filing 2026-03-31 2026-05-15
KVUE
KENVUE INC
Consumer Defensive 4.02% 2.67% #5 3
Prev: #8
4.1 74,934 18.5%
P
S
480,517 $8,284,113 2023 Q3 13F Filing 2026-03-31 2026-05-15
ACLX
ARCELLX INC
Healthcare 3.01% #6
Prev: #—
4.7 53,982 no change
NEW
53,982 $6,198,213 2026 Q1 13F Filing 2026-03-31 2026-05-15
TERN
TERNS PHARMACEU...
Healthcare 2.97% #7
Prev: #—
4.7 115,958 no change
NEW
115,958 $6,113,306 2026 Q1 13F Filing 2026-03-31 2026-05-15
APLS
APELLIS PHARMAC...
Healthcare 2.49% #8
Prev: #—
4.5 127,440 no change
NEW
127,440 $5,126,911 2026 Q1 13F Filing 2026-03-31 2026-05-15
RVMD
REVOLUTION MEDI...
PUT
PUT Option 1.84% #9
Prev: #—
4.2 39,000 no change
NEW
39,000 $3,792,750 2026 Q1 13F Filing 2026-03-31 2026-05-15
RVMD
REVOLUTION MEDI...
Healthcare 1.82% #10
Prev: #—
4.2 38,593 no change
NEW
38,593 $3,753,169 2026 Q1 13F Filing 2026-03-31 2026-05-15
OS
ONESTREAM INC
Technology 0.70% #11
Prev: #—
3.8 60,372 no change
NEW
60,372 $1,448,928 2026 Q1 13F Filing 2026-03-31 2026-05-15
TTWO
TAKE-TWO INTERA...
Communication Services 0.62% #12
Prev: #—
3.7 6,500 no change
NEW
6,500 $1,283,750 2008 Q1 13F Filing 2026-03-31 2026-05-15
DAWN
DAY ONE BIOPHAR...
Healthcare 0.33% #13
Prev: #—
3.6 31,626 no change
NEW
31,626 $678,061 2026 Q1 13F Filing 2026-03-31 2026-05-15
N/A
ATRIUM THERAPEU...
Unknown 0.32% #14
Prev: #—
3.6 49,913 no change
NEW
49,913 $667,337 13F Filing 2026-03-31 2026-05-15
TIC
TIC SOLUTIONS I...
Industrials 0.25% 0.30% #15 1
Prev: #14
1.1 no change no change
P
S
77,339 $508,891 2025 Q1 13F Filing 2026-03-31 2026-05-15
MANU
MANCHESTER UTD ...
Communication Services 0.12% 0.09% #16 1
Prev: #17
0.5 350 2.4%
P
S
14,920 $250,954 2024 Q1 13F Filing 2026-03-31 2026-05-15
SGRY
SURGERY PARTNER...
Healthcare 0.06% 1.01% #17 6
Prev: #11
0.0 -160,233 -94.1%
P
S
10,025 $119,498 2025 Q1 13F Filing 2026-03-31 2026-05-15
WBD
WARNER BROS DIS...
CALL
CALL Option 0.00% 0.22%
Sold All 😨
(Was: #16)
0.0 -20,100 -100.0%
CLOSED
$— 2022 Q1 13F Filing 2026-03-31 2026-05-15
MLYS
MINERALYS THERA...
Healthcare 0.00% 0.23%
Sold All 😨
(Was: #15)
0.0 -16,737 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
CDTX
CIDARA THERAPEU...
Unknown 0.00% 0.41%
Sold All 😨
(Was: #13)
0.0 -4,900 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
DAY
DAYFORCE INC
Unknown 0.00% 1.04%
Sold All 😨
(Was: #10)
0.0 -39,241 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
NSC
NORFOLK SOUTHN ...
Industrials 0.00% 2.78%
Sold All 😨
(Was: #7)
0.0 -25,200 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
CFLT
CONFLUENT INC
Technology 0.00% 5.84%
Sold All 😨
(Was: #6)
0.0 -505,486 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
RNA
AVIDITY BIOSCIE...
Healthcare 0.00% 10.07%
Sold All 😨
(Was: #5)
0.0 -365,144 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
EXAS
EXACT SCIENCES ...
Healthcare 0.00% 18.77%
Sold All 😨
(Was: #2)
0.0 -483,589 -100.0%
CLOSED
$— 2025 Q4 13F Filing 2026-03-31 2026-05-15
CYBR
CYBERARK SOFTWA...
Unknown 0.00% 22.70%
Sold All 😨
(Was: #1)
0.0 -133,145 -100.0%
CLOSED
$— 2025 Q3 13F Filing 2026-03-31 2026-05-15
Showing 1-26 of 26 holdings

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