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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
JKS
1126
JinkoSolar
JKS
$1.31B
| $44K | ﹤0.01% |
2,668
+1,252
| +88% | +$20.6K |
|
1127
ProShares UltraShort Materials
SMN
$808K
| $44K | ﹤0.01% |
+303
| New | +$44K |
|
|
MSGN
1128
DELISTED
MSG Networks Inc.
MSGN
| $44K | ﹤0.01% |
+1,894
| New | +$44K |
|
1129
MGIC Investment
MTG
$6.45B
| $43K | ﹤0.01% |
+4,272
| New | +$43K |
|
|
KNGT
1130
DELISTED
KNIGHT TRANSPORTATION INC
KNGT
| $43K | ﹤0.01% |
+1,397
| New | +$43K |
|
1131
Brookfield
BN
$104B
| $42K | ﹤0.01% |
2,181
-672
| -24% | -$12.9K |
|
1132
ProShares Short Dow30
DOG
$130M
| $42K | ﹤0.01% |
581
-2,063
| -78% | -$149K |
|
|
ELME
1133
Elme Communities
ELME
$1.48B
| $42K | ﹤0.01% |
+1,346
| New | +$42K |
|
1134
Rollins
ROL
$27.2B
| $42K | ﹤0.01% |
+2,558
| New | +$42K |
|
|
ERF
1135
DELISTED
Enerplus Corporation
ERF
| $42K | ﹤0.01% |
5,257
-5
| -0.1% | -$40 |
|
|
SRC
1136
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $42K | ﹤0.01% |
928
+684
| +280% | +$31K |
|
1137
Dillards
DDS
$9.3B
| $41K | ﹤0.01% |
+802
| New | +$41K |
|
1138
Direxion Daily MSCI India Bull 2X Shares
INDL
$70.1M
| $41K | ﹤0.01% |
582
+382
| +191% | +$26.9K |
|
1139
Iron Mountain
IRM
$29.4B
| $41K | ﹤0.01% |
1,162
-2,232
| -66% | -$78.8K |
|
1140
NXP Semiconductors
NXPI
$55.9B
| $41K | ﹤0.01% |
400
-66,892
| -99% | -$6.86M |
|
|
PBT
1141
Permian Basin Royalty Trust
PBT
$855M
| $41K | ﹤0.01% |
4,418
+4,389
| +15,134% | +$40.7K |
|
1142
Rithm Capital
RITM
$6.61B
| $41K | ﹤0.01% |
2,436
-2,664
| -52% | -$44.8K |
|
1143
Assertio
ASRT
$91.1M
| $40K | ﹤0.01% |
816
-2,414
| -75% | -$118K |
|
1144
CorMedix
CRMD
$830M
| $40K | ﹤0.01% |
5,026
+1,506
| +43% | +$12K |
|
|
SWFT
1145
DELISTED
Swift Transportation Company
SWFT
| $40K | ﹤0.01% |
+1,969
| New | +$40K |
|
1146
Sabre
SABR
$726M
| $39K | ﹤0.01% |
+1,864
| New | +$39K |
|
1147
Standard Motor Products
SMP
$883M
| $39K | ﹤0.01% |
801
-62
| -7% | -$3.02K |
|
|
GHL
1148
DELISTED
Greenhill & Co., Inc.
GHL
| $39K | ﹤0.01% |
1,358
+1,058
| +353% | +$30.4K |
|
|
ICON
1149
DELISTED
Iconix Brand Group, Inc.
ICON
| $39K | ﹤0.01% |
+521
| New | +$39K |
|
1150
Geron
GERN
$810M
| $38K | ﹤0.01% |
16,744
-8,013
| -32% | -$18.2K |
|