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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1251
Lincoln Electric
LECO
$13.3B
| $56K | ﹤0.01% |
296
+162
| +121% | +$30.6K |
|
1252
ProAssurance
PRA
$1.22B
| $56K | ﹤0.01% |
3,786
-16,499
| -81% | -$244K |
|
1253
Suzano
SUZ
$11.9B
| $56K | ﹤0.01% |
5,693
+3,368
| +145% | +$33.1K |
|
|
AAN
1254
DELISTED
The Aaron's Company, Inc.
AAN
| $56K | ﹤0.01% |
+5,703
| New | +$56K |
|
1255
ARK Web x.0 ETF
ARKW
$2.44B
| $55K | ﹤0.01% |
+651
| New | +$55K |
|
1256
Cardlytics
CDLX
$56.4M
| $55K | ﹤0.01% |
17,497
-3,286
| -16% | -$10.3K |
|
1257
Haleon
HLN
$44.2B
| $55K | ﹤0.01% |
5,243
+5,057
| +2,719% | +$53K |
|
1258
Inovio Pharmaceuticals
INO
$135M
| $55K | ﹤0.01% |
9,671
+6,617
| +217% | +$37.6K |
|
1259
Intrepid Potash
IPI
$386M
| $55K | ﹤0.01% |
2,329
+699
| +43% | +$16.5K |
|
1260
Flowers Foods
FLO
$2.96B
| $54K | ﹤0.01% |
+2,373
| New | +$54K |
|
1261
Perdoceo Education
PRDO
$2.26B
| $54K | ﹤0.01% |
2,451
+1,751
| +250% | +$38.6K |
|
1262
Avient
AVNT
$3.34B
| $53K | ﹤0.01% |
1,068
+781
| +272% | +$38.8K |
|
1263
BARK
BARK
$152M
| $53K | ﹤0.01% |
32,785
-35,393
| -52% | -$57.2K |
|
1264
HEICO Class A
HEI.A
$35.2B
| $53K | ﹤0.01% |
262
+146
| +126% | +$29.5K |
|
1265
Oportun Financial
OPRT
$283M
| $53K | ﹤0.01% |
19,208
-3,376
| -15% | -$9.32K |
|
|
AIFU
1266
AIFU Inc. Class A Ordinary Share
AIFU
$83.4M
| $53K | ﹤0.01% |
+1,870
| New | +$53K |
|
1267
Amdocs
DOX
$9.4B
| $52K | ﹤0.01% |
601
-3,199
| -84% | -$277K |
|
1268
Euronet Worldwide
EEFT
$3.6B
| $52K | ﹤0.01% |
+527
| New | +$52K |
|
1269
Genmab
GMAB
$17.4B
| $52K | ﹤0.01% |
+2,170
| New | +$52K |
|
1270
ODP
ODP
$616M
| $52K | ﹤0.01% |
+1,778
| New | +$52K |
|
1271
Applied Therapeutics
APLT
$63.1M
| $51K | ﹤0.01% |
+6,071
| New | +$51K |
|
|
CTO
1272
CTO Realty Growth
CTO
$546M
| $51K | ﹤0.01% |
2,717
+2,185
| +411% | +$41K |
|
1273
Daktronics
DAKT
$1.12B
| $51K | ﹤0.01% |
+3,972
| New | +$51K |
|
1274
nCino
NCNO
$3.49B
| $51K | ﹤0.01% |
+1,629
| New | +$51K |
|
1275
Origin Materials
ORGN
$81.6M
| $51K | ﹤0.01% |
33,688
+29,243
| +658% | +$44.3K |
|