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Livermore
Livermore
ZHEN

Simplex Trading, LLC

SEC CIK
0001488542
Latest filing
Aug 12, 2026

ATEX holding history

Anterix Inc. in every 13F filed by Simplex Trading, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

ATEX overviewAll 13F holders of ATEXFull Q2 2026 holdings

Shares (Q2 2026)
5,377
Value
$553.5K
% of portfolio
<0.1%
Quarters held
20
Since Q1 2021
Holdings of ATEX by Simplex Trading, LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 20265,377$553.5K<0.1%−38,373−87.7%ReducedHolders
Q1 202643,750$1.67M0.1%+21,200+94.0%AddedHolders
Q4 202522,550$492.3K<0.1%+19,582+659.8%AddedHolders
Q3 20252,968$63.0K<0.1%+2,968NewHolders
Q2 20250$00.0%−12,634−100.0%Sold outHolders
Q1 202512,634$462.0K<0.1%+12,511+10,171.5%AddedHolders
Q4 2024123$3.00K<0.1%+27+28.1%AddedHolders
Q3 202496$3.00K<0.1%+96NewHolders
Q2 20240$00.0%−13,667−100.0%Sold outHolders
Q1 202413,667$459.0K<0.1%+9,216+207.1%AddedHolders
Q4 20234,451$148.0K<0.1%+288+6.9%AddedHolders
Q3 20234,163$130.0K<0.1%+3,598+636.8%AddedHolders
Q2 2023565$17.0K<0.1%−4,503−88.9%ReducedHolders
Q1 20235,068$167.0K<0.1%+3,362+197.1%AddedHolders
Q4 20221,706$54.0K<0.1%−978−36.4%ReducedHolders
Q3 20222,684$95.0K<0.1%−1,139−29.8%ReducedHolders
Q2 20223,823$157.0K<0.1%−5,696−59.8%ReducedHolders
Q1 20229,519$551.0K<0.1%+9,262+3,603.9%AddedHolders
Q4 2021257$15.0K<0.1%−15,590−98.4%ReducedHolders
Q3 202115,847$950.0K<0.1%00.0%UnchangedHolders
Q2 202115,847$950.0K<0.1%−1,441−8.3%ReducedHolders
Q1 202117,288$815.0K<0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.