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 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$16.3M |
| 3 |
Walt Disney
DIS
|
+$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.4M |
| 5 |
Gilead Sciences
GILD
|
+$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
+$95.3M |
| 2 |
Apple
AAPL
|
+$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20M |
| 4 |
IBM
IBM
|
+$13.4M |
| 5 |
Baidu
BIDU
|
+$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
LABL
976
DELISTED
Multi-Color Corp
LABL
| $45K | ﹤0.01% |
+594
| New | +$45K |
|
|
LAYN
977
DELISTED
Layne Christensen Co
LAYN
| $45K | ﹤0.01% |
+7,068
| New | +$45K |
|
|
SGY
978
DELISTED
Stone Energy
SGY
| $45K | ﹤0.01% |
+163
| New | +$45K |
|
979
Azenta
AZTA
$1.38B
| $44K | ﹤0.01% |
3,774
-5,614
| -60% | -$65.5K |
|
980
Scotiabank
BNS
$79.1B
| $44K | ﹤0.01% |
1,048
-3,210
| -75% | -$135K |
|
981
Enphase Energy
ENPH
$4.94B
| $44K | ﹤0.01% |
11,957
+10,053
| +528% | +$37K |
|
982
Monolithic Power Systems
MPWR
$39.9B
| $44K | ﹤0.01% |
+873
| New | +$44K |
|
|
TCS
983
DELISTED
THE CONTAINER STORE GROUP, INC.
TCS
| $44K | ﹤0.01% |
210
-133
| -39% | -$27.9K |
|
|
QUOT
984
DELISTED
Quotient Technology Inc
QUOT
| $44K | ﹤0.01% |
+4,900
| New | +$44K |
|
|
NYRT
985
DELISTED
New York REIT, Inc.
NYRT
| $44K | ﹤0.01% |
+445
| New | +$44K |
|
|
FINL
986
DELISTED
Finish Line
FINL
| $44K | ﹤0.01% |
2,280
+210
| +10% | +$4.05K |
|
|
KCG
987
DELISTED
KCG Holdings, Inc.
KCG
| $44K | ﹤0.01% |
+4,054
| New | +$44K |
|
988
Atara Biotherapeutics
ATRA
$84.1M
| $43K | ﹤0.01% |
55
+19
| +53% | +$14.9K |
|
989
Baytex Energy
BTE
$1.84B
| $43K | ﹤0.01% |
13,647
+4,156
| +44% | +$13.1K |
|
990
Copa Holdings
CPA
$4.82B
| $43K | ﹤0.01% |
1,042
-89
| -8% | -$3.67K |
|
991
Fiserv
FI
$73.2B
| $43K | ﹤0.01% |
1,002
-17,788
| -95% | -$763K |
|
992
Paylocity
PCTY
$9.38B
| $43K | ﹤0.01% |
1,450
+1,181
| +439% | +$35K |
|
|
CMD
993
DELISTED
Cantel Medical Corporation
CMD
| $43K | ﹤0.01% |
+764
| New | +$43K |
|
|
LMNS
994
DELISTED
LUMENIS LTD CL B ORD SHS (ISR)
LMNS
| $43K | ﹤0.01% |
+3,133
| New | +$43K |
|
|
PSXP
995
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $43K | ﹤0.01% |
876
-118
| -12% | -$5.79K |
|
|
STFC
996
DELISTED
State Auto Financial Corp
STFC
| $43K | ﹤0.01% |
1,918
+1,890
| +6,750% | +$42.4K |
|
997
Applied Optoelectronics
AAOI
$1.69B
| $42K | ﹤0.01% |
2,281
-1,231
| -35% | -$22.7K |
|
998
Direxion Daily Real Estate Bull 3X Shares
DRN
$66.8M
| $42K | ﹤0.01% |
2,676
-13,944
| -84% | -$219K |
|
999
Radian Group
RDN
$4.78B
| $42K | ﹤0.01% |
2,673
-914
| -25% | -$14.4K |
|
1000
Banco Bradesco
BBD
$33.1B
| $41K | ﹤0.01% |
16,603
-30
| -0.2% | -$74 |
|