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 |
Alibaba
BABA
|
+$48.9M |
| 2 |
Boeing
BA
|
+$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
FedEx
FDX
|
+$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
+$17.5M |
| 4 |
Netflix
NFLX
|
+$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1201
Methode Electronics
MEI
$287M
| $33K | ﹤0.01% |
+1,002
| New | +$33K |
|
1202
Matrix Service
MTRX
$353M
| $33K | ﹤0.01% |
1,932
+195
| +11% | +$3.33K |
|
1203
SuRo Capital
SSSS
$221M
| $33K | ﹤0.01% |
+6,419
| New | +$33K |
|
1204
CVR Partners
UAN
$930M
| $33K | ﹤0.01% |
867
-1,315
| -60% | -$50.1K |
|
1205
Zions Bancorporation
ZION
$8.62B
| $33K | ﹤0.01% |
+742
| New | +$33K |
|
|
SECO
1206
DELISTED
Secoo Holding Limited ADR
SECO
| $33K | ﹤0.01% |
494
-301
| -38% | -$20.1K |
|
|
INFO
1207
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $33K | ﹤0.01% |
+500
| New | +$33K |
|
|
DERM
1208
DELISTED
Dermira, Inc.
DERM
| $33K | ﹤0.01% |
5,205
-12,890
| -71% | -$81.7K |
|
1209
Abeona Therapeutics
ABEO
$330M
| $32K | ﹤0.01% |
577
+460
| +393% | +$25.5K |
|
1210
Medpace
MEDP
$13.8B
| $32K | ﹤0.01% |
+385
| New | +$32K |
|
1211
Pinterest
PINS
$23.8B
| $32K | ﹤0.01% |
1,236
-54,502
| -98% | -$1.41M |
|
1212
StoneX
SNEX
$5.04B
| $32K | ﹤0.01% |
1,807
+828
| +85% | +$14.7K |
|
1213
TriNet
TNET
$3.35B
| $32K | ﹤0.01% |
+523
| New | +$32K |
|
1214
United States Gasoline Fund
UGA
$77.2M
| $32K | ﹤0.01% |
+1,116
| New | +$32K |
|
|
XHR
1215
Xenia Hotels & Resorts
XHR
$1.41B
| $32K | ﹤0.01% |
1,559
-4,461
| -74% | -$91.6K |
|
|
CURO
1216
DELISTED
CURO Group Holdings Corp.
CURO
| $32K | ﹤0.01% |
2,441
-18,110
| -88% | -$237K |
|
|
SRCI
1217
DELISTED
SRC Energy Inc
SRCI
| $32K | ﹤0.01% |
6,879
+2,500
| +57% | +$11.6K |
|
1218
Brixmor Property Group
BRX
$8.57B
| $31K | ﹤0.01% |
1,553
+524
| +51% | +$10.5K |
|
1219
Calix
CALX
$4.01B
| $31K | ﹤0.01% |
4,899
-5,738
| -54% | -$36.3K |
|
|
IFN
1220
India Fund
IFN
$600M
| $31K | ﹤0.01% |
1,550
+325
| +27% | +$6.5K |
|
1221
Pampa Energía
PAM
$3.23B
| $31K | ﹤0.01% |
1,812
-33,697
| -95% | -$576K |
|
1222
Pentair
PNR
$18.2B
| $31K | ﹤0.01% |
+837
| New | +$31K |
|
1223
Research Frontiers
REFR
$42.1M
| $31K | ﹤0.01% |
9,721
+9,113
| +1,499% | +$29.1K |
|
1224
Rockwell Medical
RMTI
$55.8M
| $31K | ﹤0.01% |
1,053
+565
| +116% | +$16.6K |
|
1225
SPDR Dow Jones REIT ETF
RWR
$1.88B
| $31K | ﹤0.01% |
+300
| New | +$31K |
|