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 |
Amazon
AMZN
|
+$102M |
| 2 |
TSMC
TSM
|
+$29.6M |
| 3 |
JPMorgan Chase
JPM
|
+$21.9M |
| 4 |
Boeing
BA
|
+$18.8M |
| 5 |
Target
TGT
|
+$13.5M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
+$94.2M |
| 2 |
Tesla
TSLA
|
+$91.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$81.5M |
| 4 |
NVIDIA
NVDA
|
+$60M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Sector Composition
| 1 | Consumer Discretionary | 21.73% |
| 2 | Technology | 16.48% |
| 3 | Healthcare | 9.06% |
| 4 | Financials | 8.3% |
| 5 | Communication Services | 7.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CSII
1026
DELISTED
Cardiovascular Systems, Inc.
CSII
| $122K | ﹤0.01% |
+3,117
| New | +$122K |
|
1027
Black Stone Minerals
BSM
$2.67B
| $121K | ﹤0.01% |
19,727
-7,183
| -27% | -$44.1K |
|
1028
Century Aluminum
CENX
$2.39B
| $121K | ﹤0.01% |
17,063
-3,187
| -16% | -$22.6K |
|
1029
Caesarstone
CSTE
$50.1M
| $121K | ﹤0.01% |
12,404
-45,332
| -79% | -$442K |
|
1030
iShares US Basic Materials ETF
IYM
$569M
| $121K | ﹤0.01% |
+1,234
| New | +$121K |
|
1031
Kontoor Brands
KTB
$4.5B
| $121K | ﹤0.01% |
+5,025
| New | +$121K |
|
1032
Teradata
TDC
$2B
| $121K | ﹤0.01% |
5,367
-14,493
| -73% | -$327K |
|
1033
Q32 Bio
QTTB
$22.8M
| $121K | ﹤0.01% |
628
+451
| +255% | +$86.9K |
|
|
DISCK
1034
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $121K | ﹤0.01% |
6,215
+4,702
| +311% | +$91.5K |
|
1035
Allot
ALLT
$429M
| $120K | ﹤0.01% |
13,291
+3,866
| +41% | +$34.9K |
|
1036
Pathward Financial
CASH
$1.74B
| $120K | ﹤0.01% |
+6,257
| New | +$120K |
|
1037
Coherent
COHR
$15.9B
| $120K | ﹤0.01% |
2,967
-22,634
| -88% | -$915K |
|
1038
Invesco DB Oil Fund
DBO
$228M
| $120K | ﹤0.01% |
16,753
-23,953
| -59% | -$172K |
|
1039
Fox Factory Holding Corp
FOXF
$1.16B
| $120K | ﹤0.01% |
1,616
-338
| -17% | -$25.1K |
|
|
CMO
1040
DELISTED
Capstead Mortgage Corp.
CMO
| $120K | ﹤0.01% |
21,447
+3,982
| +23% | +$22.3K |
|
1041
TTEC Holdings
TTEC
$174M
| $119K | ﹤0.01% |
+2,183
| New | +$119K |
|
|
AHH
1042
Armada Hoffler Properties
AHH
$599M
| $117K | ﹤0.01% |
12,742
-439
| -3% | -$4.03K |
|
1043
Korea Electric Power
KEP
$17.2B
| $117K | ﹤0.01% |
13,481
+12,875
| +2,125% | +$112K |
|
1044
E.W. Scripps
SSP
$258M
| $117K | ﹤0.01% |
10,273
+3,378
| +49% | +$38.5K |
|
|
LAC
1045
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $117K | ﹤0.01% |
+10,331
| New | +$117K |
|
|
LTHM
1046
DELISTED
Livent Corporation
LTHM
| $116K | ﹤0.01% |
13,042
+1,296
| +11% | +$11.5K |
|
|
ATRS
1047
DELISTED
Antares Pharma, Inc.
ATRS
| $116K | ﹤0.01% |
+43,218
| New | +$116K |
|
1048
1-800-Flowers.com
FLWS
$342M
| $115K | ﹤0.01% |
4,628
+2,429
| +110% | +$60.4K |
|
1049
iShares Europe ETF
IEV
$2.34B
| $115K | ﹤0.01% |
2,757
+950
| +53% | +$39.6K |
|
1050
Upland Software
UPLD
$71.4M
| $115K | ﹤0.01% |
3,062
-5,177
| -63% | -$194K |
|