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
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
BRSL
901
Brightstar Lottery PLC
BRSL
$3.18B
| $89K | ﹤0.01% |
4,915
-56
| -1% | -$1.01K |
|
902
Ultragenyx Pharmaceutical
RARE
$3.01B
| $89K | ﹤0.01% |
1,441
-6,457
| -82% | -$399K |
|
903
Live Nation Entertainment
LYV
$40.4B
| $88K | ﹤0.01% |
2,540
-8,152
| -76% | -$282K |
|
|
GBT
904
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $88K | ﹤0.01% |
+3,239
| New | +$88K |
|
|
CYS
905
DELISTED
CYS Investments Inc.
CYS
| $88K | ﹤0.01% |
10,530
+6,052
| +135% | +$50.6K |
|
906
Barclays
BCS
$72.8B
| $87K | ﹤0.01% |
8,667
-7,106
| -45% | -$71.3K |
|
907
CNX Resources
CNX
$4.23B
| $87K | ﹤0.01% |
+6,990
| New | +$87K |
|
908
iShares Select Dividend ETF
DVY
$20.9B
| $87K | ﹤0.01% |
+944
| New | +$87K |
|
909
Direxion Daily S&P Biotech Bear 3X Shares
LABD
$68.8M
| $87K | ﹤0.01% |
63
+47
| +294% | +$64.9K |
|
910
Tower Semiconductor
TSEM
$7.38B
| $87K | ﹤0.01% |
3,673
-22,299
| -86% | -$528K |
|
911
Dentsply Sirona
XRAY
$2.78B
| $87K | ﹤0.01% |
+1,354
| New | +$87K |
|
|
GHL
912
DELISTED
Greenhill & Co., Inc.
GHL
| $87K | ﹤0.01% |
4,356
+2,998
| +221% | +$59.9K |
|
|
LCI
913
DELISTED
Lannett Company, Inc.
LCI
| $87K | ﹤0.01% |
1,069
+805
| +305% | +$65.5K |
|
|
OTIC
914
DELISTED
Otonomy, Inc.
OTIC
| $87K | ﹤0.01% |
+4,643
| New | +$87K |
|
915
Merit Medical Systems
MMSI
$5.34B
| $86K | ﹤0.01% |
2,267
-1,258
| -36% | -$47.7K |
|
916
NN Inc
NNBR
$117M
| $86K | ﹤0.01% |
3,151
+922
| +41% | +$25.2K |
|
917
GoDaddy
GDDY
$20.6B
| $85K | ﹤0.01% |
+2,005
| New | +$85K |
|
918
Genworth Financial
GNW
$3.62B
| $85K | ﹤0.01% |
+22,805
| New | +$85K |
|
|
NAK
919
Northern Dynasty Minerals
NAK
$450M
| $85K | ﹤0.01% |
61,457
-33,508
| -35% | -$46.3K |
|
|
CYOU
920
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $85K | ﹤0.01% |
+2,218
| New | +$85K |
|
921
Hilltop Holdings
HTH
$2.2B
| $84K | ﹤0.01% |
3,228
+2,091
| +184% | +$54.4K |
|
922
InterDigital
IDCC
$8.38B
| $84K | ﹤0.01% |
1,097
-7,621
| -87% | -$584K |
|
|
MODN
923
DELISTED
MODEL N, INC.
MODN
| $84K | ﹤0.01% |
6,354
-18,926
| -75% | -$250K |
|
|
ELOS
924
DELISTED
Syneron Medical Ltd
ELOS
| $84K | ﹤0.01% |
7,736
+2,159
| +39% | +$23.4K |
|
925
NGL Energy Partners
NGL
$744M
| $83K | ﹤0.01% |
5,947
+5,517
| +1,283% | +$77K |
|