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 |
Gilead Sciences
GILD
|
+$16.8M |
| 2 |
Apple
AAPL
|
+$16.2M |
| 3 |
Booking.com
BKNG
|
+$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$15.3M |
| 5 |
Wells Fargo
WFC
|
+$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
+$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1251
QuidelOrtho
QDEL
$2.03B
| $10K | ﹤0.01% |
493
-26
| -5% | -$527 |
|
1252
Schlumberger
SLB
$53.8B
| $10K | ﹤0.01% |
+128
| New | +$10K |
|
1253
Stagwell
STGW
$1.44B
| $10K | ﹤0.01% |
+1,016
| New | +$10K |
|
1254
Titan Machinery
TITN
$466M
| $10K | ﹤0.01% |
+991
| New | +$10K |
|
1255
Talphera
TLPH
$20.4M
| $10K | ﹤0.01% |
+140
| New | +$10K |
|
1256
Tandem Diabetes Care
TNDM
$864M
| $10K | ﹤0.01% |
+138
| New | +$10K |
|
|
ALIM
1257
DELISTED
Alimera Sciences, Inc.
ALIM
| $10K | ﹤0.01% |
+490
| New | +$10K |
|
|
LDL
1258
DELISTED
Lydall, Inc.
LDL
| $10K | ﹤0.01% |
+202
| New | +$10K |
|
|
RIC
1259
DELISTED
Richmont Mines Inc.
RIC
| $10K | ﹤0.01% |
+1,003
| New | +$10K |
|
|
NIHD
1260
DELISTED
NII Holdings, Inc. Common Stock
NIHD
| $10K | ﹤0.01% |
3,199
-3,484
| -52% | -$10.9K |
|
|
ANTE
1261
AirNet Technology Inc. Ordinary Share
ANTE
$547M
| $9K | ﹤0.01% |
+143
| New | +$9K |
|
1262
Anavex Life Sciences
AVXL
$823M
| $9K | ﹤0.01% |
2,601
+2,585
| +16,156% | +$8.95K |
|
1263
BBVA Argentina
BBAR
$1.96B
| $9K | ﹤0.01% |
464
+84
| +22% | +$1.63K |
|
|
EFC
1264
Ellington Financial
EFC
$1.35B
| $9K | ﹤0.01% |
575
-2,461
| -81% | -$38.5K |
|
1265
Genie Energy
GNE
$407M
| $9K | ﹤0.01% |
1,622
-303
| -16% | -$1.68K |
|
1266
International Bancshares
IBOC
$4.43B
| $9K | ﹤0.01% |
317
+170
| +116% | +$4.83K |
|
1267
Maximus
MMS
$5.08B
| $9K | ﹤0.01% |
+173
| New | +$9K |
|
1268
Northern Oil and Gas
NOG
$2.51B
| $9K | ﹤0.01% |
337
-146
| -30% | -$3.9K |
|
1269
Plug Power
PLUG
$1.74B
| $9K | ﹤0.01% |
5,552
-4,200
| -43% | -$6.81K |
|
1270
Stepan Co
SCL
$1.12B
| $9K | ﹤0.01% |
+131
| New | +$9K |
|
1271
Silgan Holdings
SLGN
$4.76B
| $9K | ﹤0.01% |
358
-1,956
| -85% | -$49.2K |
|
1272
SuRo Capital
SSSS
$212M
| $9K | ﹤0.01% |
2,274
+43
| +2% | +$170 |
|
1273
TriNet
TNET
$3.48B
| $9K | ﹤0.01% |
+429
| New | +$9K |
|
1274
VOC Energy
VOC
$46.2M
| $9K | ﹤0.01% |
+3,020
| New | +$9K |
|
1275
Vital Energy
VTLE
$649M
| $9K | ﹤0.01% |
+36
| New | +$9K |
|