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 |
Amazon
AMZN
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1001
Markel Group
MKL
$24.6B
| $60K | ﹤0.01% |
+57
| New | +$60K |
|
1002
CRISPR Therapeutics
CRSP
$4.95B
| $59K | ﹤0.01% |
+3,323
| New | +$59K |
|
|
DHC
1003
Diversified Healthcare Trust
DHC
$1.06B
| $59K | ﹤0.01% |
3,031
+2,196
| +263% | +$42.7K |
|
1004
Lennar Class A
LEN
$36.4B
| $59K | ﹤0.01% |
1,183
-35,100
| -97% | -$1.75M |
|
1005
Universal Corp
UVV
$1.39B
| $59K | ﹤0.01% |
1,043
-1,438
| -58% | -$81.3K |
|
1006
Teucrium Wheat Fund
WEAT
$116M
| $59K | ﹤0.01% |
9,078
-13,618
| -60% | -$88.5K |
|
|
PETX
1007
DELISTED
Aratana Therapeutics, Inc.
PETX
| $59K | ﹤0.01% |
+9,760
| New | +$59K |
|
1008
Carvana
CVNA
$49.2B
| $58K | ﹤0.01% |
+3,962
| New | +$58K |
|
1009
CVS Health
CVS
$94.5B
| $58K | ﹤0.01% |
715
-58,473
| -99% | -$4.74M |
|
1010
Digimarc
DMRC
$198M
| $58K | ﹤0.01% |
1,594
-385
| -19% | -$14K |
|
1011
Enerpac Tool Group
EPAC
$2.29B
| $58K | ﹤0.01% |
2,300
-15,710
| -87% | -$396K |
|
1012
iShares S&P Mid-Cap 400 Growth ETF
IJK
$9.26B
| $58K | ﹤0.01% |
+1,164
| New | +$58K |
|
1013
Mueller Industries
MLI
$10.9B
| $58K | ﹤0.01% |
3,340
+2,594
| +348% | +$45K |
|
1014
Morgan Stanley
MS
$251B
| $58K | ﹤0.01% |
+1,209
| New | +$58K |
|
|
AREX
1015
DELISTED
Approach Resources Inc.
AREX
| $58K | ﹤0.01% |
23,133
+23,122
| +210,200% | +$58K |
|
|
JASO
1016
DELISTED
JA Solar Holdings, Co., Ltd
JASO
| $58K | ﹤0.01% |
+7,630
| New | +$58K |
|
|
CMO
1017
DELISTED
Capstead Mortgage Corp.
CMO
| $58K | ﹤0.01% |
+6,099
| New | +$58K |
|
1018
Adverum Biotechnologies
ADVM
$67.1M
| $57K | ﹤0.01% |
1,578
+1,562
| +9,763% | +$56.4K |
|
1019
Guidewire Software
GWRE
$21.2B
| $57K | ﹤0.01% |
+743
| New | +$57K |
|
|
RP
1020
DELISTED
RealPage, Inc.
RP
| $57K | ﹤0.01% |
1,453
-489
| -25% | -$19.2K |
|
|
INST
1021
DELISTED
Instructure, Inc.
INST
| $57K | ﹤0.01% |
1,742
-19,013
| -92% | -$622K |
|
|
ALDR
1022
DELISTED
Alder Biopharmaceuticals, Inc.
ALDR
| $57K | ﹤0.01% |
4,661
-25,708
| -85% | -$314K |
|
|
ICON
1023
DELISTED
Iconix Brand Group, Inc.
ICON
| $57K | ﹤0.01% |
1,005
-506
| -33% | -$28.7K |
|
|
AAT
1024
American Assets Trust
AAT
$1.27B
| $56K | ﹤0.01% |
1,423
+429
| +43% | +$16.9K |
|
1025
Codexis
CDXS
$226M
| $56K | ﹤0.01% |
+8,460
| New | +$56K |
|