Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
501
Weatherford International
WFRD
$4.44B
| $1.1M | ﹤0.01% |
39,705
+37,188
| +1,477% | +$1.03M |
|
|
BDSI
502
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $1.09M | ﹤0.01% |
+352,537
| New | +$1.09M |
|
503
ProShares UltraPro Short Russell2000
SRTY
$81.6M
| $1.09M | ﹤0.01% |
25,874
-11,532
| -31% | -$484K |
|
504
Ciena
CIEN
$17.3B
| $1.08M | ﹤0.01% |
14,074
+13,526
| +2,468% | +$1.04M |
|
505
Cytokinetics
CYTK
$6.16B
| $1.08M | ﹤0.01% |
23,760
-25,472
| -52% | -$1.16M |
|
506
Camping World
CWH
$1.11B
| $1.08M | ﹤0.01% |
26,756
-20,715
| -44% | -$836K |
|
507
Extra Space Storage
EXR
$30.8B
| $1.08M | ﹤0.01% |
4,743
+4,084
| +620% | +$926K |
|
508
Arqit Quantum
ARQQ
$428M
| $1.07M | ﹤0.01% |
+1,794
| New | +$1.07M |
|
509
Dynatrace
DT
$15.1B
| $1.07M | ﹤0.01% |
+17,748
| New | +$1.07M |
|
|
ZH
510
Zhihu
ZH
$442M
| $1.07M | ﹤0.01% |
32,187
+26,140
| +432% | +$868K |
|
511
Invesco CurrencyShares Euro Currency Trust
FXE
$529M
| $1.07M | ﹤0.01% |
10,089
-3,163
| -24% | -$335K |
|
512
On Holding
ONON
$14.5B
| $1.07M | ﹤0.01% |
+28,198
| New | +$1.07M |
|
513
RingCentral
RNG
$2.94B
| $1.07M | ﹤0.01% |
+5,691
| New | +$1.07M |
|
514
Capri Holdings
CPRI
$2.54B
| $1.06M | ﹤0.01% |
16,387
-39,564
| -71% | -$2.57M |
|
515
Snap-on
SNA
$17.1B
| $1.06M | ﹤0.01% |
4,920
+3,842
| +356% | +$827K |
|
516
The RealReal
REAL
$956M
| $1.06M | ﹤0.01% |
91,044
+48,016
| +112% | +$557K |
|
517
Peabody Energy
BTU
$2.25B
| $1.05M | ﹤0.01% |
104,656
+37,585
| +56% | +$378K |
|
518
Iovance Biotherapeutics
IOVA
$858M
| $1.05M | ﹤0.01% |
+54,976
| New | +$1.05M |
|
|
NVTA
519
DELISTED
Invitae Corporation
NVTA
| $1.05M | ﹤0.01% |
68,512
+25,799
| +60% | +$394K |
|
520
Infosys
INFY
$70.5B
| $1.04M | ﹤0.01% |
+41,208
| New | +$1.04M |
|
|
NBIS
521
Nebius Group N.V. Class A Ordinary Shares
NBIS
$22.8B
| $1.04M | ﹤0.01% |
+17,223
| New | +$1.04M |
|
522
Louisiana-Pacific
LPX
$6.91B
| $1.03M | ﹤0.01% |
13,129
+9,468
| +259% | +$741K |
|
523
Kinsale Capital Group
KNSL
$10.5B
| $1.03M | ﹤0.01% |
+4,312
| New | +$1.03M |
|
524
American Outdoor Brands
AOUT
$106M
| $1.02M | ﹤0.01% |
51,400
+40,580
| +375% | +$808K |
|
|
SJR
525
DELISTED
Shaw Communications Inc.
SJR
| $1.02M | ﹤0.01% |
33,781
-1,273
| -4% | -$38.6K |
|