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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1301
Zumiez
ZUMZ
$347M
| $19K | ﹤0.01% |
729
-3,755
| -84% | -$97.9K |
|
|
IMGN
1302
DELISTED
Immunogen Inc
IMGN
| $19K | ﹤0.01% |
8,928
-41,605
| -82% | -$88.5K |
|
|
NEX
1303
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $19K | ﹤0.01% |
+2,844
| New | +$19K |
|
|
MDP
1304
DELISTED
Meredith Corporation
MDP
| $19K | ﹤0.01% |
349
-852
| -71% | -$46.4K |
|
|
IPHI
1305
DELISTED
INPHI CORPORATION
IPHI
| $19K | ﹤0.01% |
+398
| New | +$19K |
|
|
NE
1306
DELISTED
Noble Corporation
NE
| $19K | ﹤0.01% |
10,611
-7,142
| -40% | -$12.8K |
|
|
IO
1307
DELISTED
ION Geophysical Corporation
IO
| $19K | ﹤0.01% |
2,481
-4,878
| -66% | -$37.4K |
|
|
DOVA
1308
DELISTED
Dova Pharmaceuticals, Inc. Common Stock
DOVA
| $18K | ﹤0.01% |
+1,341
| New | +$18K |
|
1309
Amphastar Pharmaceuticals
AMPH
$1.3B
| $18K | ﹤0.01% |
+861
| New | +$18K |
|
1310
Brixmor Property Group
BRX
$8.57B
| $18K | ﹤0.01% |
+1,029
| New | +$18K |
|
1311
Codexis
CDXS
$219M
| $18K | ﹤0.01% |
980
+520
| +113% | +$9.55K |
|
1312
Curis
CRIS
$22.7M
| $18K | ﹤0.01% |
+496
| New | +$18K |
|
1313
Ceragon Networks
CRNT
$179M
| $18K | ﹤0.01% |
6,427
-1,343
| -17% | -$3.76K |
|
1314
Heidrick & Struggles
HSII
$1.03B
| $18K | ﹤0.01% |
+620
| New | +$18K |
|
1315
iShares Latin America 40 ETF
ILF
$1.81B
| $18K | ﹤0.01% |
543
+368
| +210% | +$12.2K |
|
1316
Lineage Cell Therapeutics
LCTX
$306M
| $18K | ﹤0.01% |
17,024
+470
| +3% | +$497 |
|
1317
Dorian LPG
LPG
$1.35B
| $18K | ﹤0.01% |
2,072
+1,110
| +115% | +$9.64K |
|
1318
MDU Resources
MDU
$3.32B
| $18K | ﹤0.01% |
1,886
-2,795
| -60% | -$26.7K |
|
1319
ProAssurance
PRA
$1.22B
| $18K | ﹤0.01% |
501
+124
| +33% | +$4.46K |
|
|
SOHU
1320
Sohu.com
SOHU
$480M
| $18K | ﹤0.01% |
1,355
-3,273
| -71% | -$43.5K |
|
1321
E.W. Scripps
SSP
$257M
| $18K | ﹤0.01% |
1,204
-103
| -8% | -$1.54K |
|
|
ACOR
1322
DELISTED
Acorda Therapeutics, Inc.
ACOR
| $18K | ﹤0.01% |
21
-60
| -74% | -$51.4K |
|
|
LCI
1323
DELISTED
Lannett Company, Inc.
LCI
| $18K | ﹤0.01% |
750
-5,424
| -88% | -$130K |
|
|
BNFT
1324
DELISTED
Benefitfocus, Inc.
BNFT
| $18K | ﹤0.01% |
663
-4,006
| -86% | -$109K |
|
|
NUAN
1325
DELISTED
Nuance Communications, Inc.
NUAN
| $18K | ﹤0.01% |
1,364
+751
| +123% | +$9.91K |
|