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 |
Invesco QQQ Trust
QQQ
|
+$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$75.9M |
| 3 |
NVIDIA
NVDA
|
+$42.6M |
| 4 |
Netflix
NFLX
|
+$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
+$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$24.3M |
| 5 |
Broadcom
AVGO
|
+$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
Q2 Holdings
QTWO
$5.13B
| $92K | ﹤0.01% |
+1,076
| New | +$92K |
|
1027
Camtek
CAMT
$3.8B
| $92K | ﹤0.01% |
7,318
-8,360
| -53% | -$105K |
|
1028
Groupon
GRPN
$925M
| $92K | ﹤0.01% |
5,079
+4,184
| +467% | +$75.8K |
|
1029
ODP
ODP
$622M
| $92K | ﹤0.01% |
3,916
+194
| +5% | +$4.56K |
|
1030
Portland General Electric
POR
$4.64B
| $92K | ﹤0.01% |
+2,223
| New | +$92K |
|
|
AAN.A
1031
DELISTED
AARON'S INC CL-A
AAN.A
| $92K | ﹤0.01% |
+2,030
| New | +$92K |
|
1032
Autohome
ATHM
$3.41B
| $91K | ﹤0.01% |
+1,208
| New | +$91K |
|
1033
Denny's
DENN
$257M
| $91K | ﹤0.01% |
+9,011
| New | +$91K |
|
1034
Duluth Holdings
DLTH
$134M
| $91K | ﹤0.01% |
12,425
+10,818
| +673% | +$79.2K |
|
1035
Sensata Technologies
ST
$4.64B
| $91K | ﹤0.01% |
+2,454
| New | +$91K |
|
|
GSB
1036
DELISTED
GlobalSCAPE, Inc.
GSB
| $91K | ﹤0.01% |
9,422
-985
| -9% | -$9.51K |
|
|
QTNT
1037
DELISTED
Quotient Limited Ordinary Shares
QTNT
| $90K | ﹤0.01% |
306
-106
| -26% | -$31.2K |
|
1038
Banc of California
BANC
$2.65B
| $90K | ﹤0.01% |
8,315
-15,251
| -65% | -$165K |
|
|
SDC
1039
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $90K | ﹤0.01% |
11,417
-42,970
| -79% | -$339K |
|
|
PRTY
1040
DELISTED
Party City Holdco Inc.
PRTY
| $90K | ﹤0.01% |
60,557
+58,257
| +2,533% | +$86.6K |
|
1041
Encompass Health
EHC
$12.7B
| $89K | ﹤0.01% |
+1,824
| New | +$89K |
|
1042
iShares US Medical Devices ETF
IHI
$4.28B
| $89K | ﹤0.01% |
2,028
-1,704
| -46% | -$74.8K |
|
1043
iShares Micro-Cap ETF
IWC
$949M
| $89K | ﹤0.01% |
1,021
+100
| +11% | +$8.72K |
|
1044
SPDR Portfolio Emerging Markets ETF
SPEM
$13.6B
| $89K | ﹤0.01% |
+2,663
| New | +$89K |
|
1045
STAAR Surgical
STAA
$1.38B
| $89K | ﹤0.01% |
+1,459
| New | +$89K |
|
1046
Power Integrations
POWI
$2.49B
| $88K | ﹤0.01% |
+1,502
| New | +$88K |
|
|
SVC
1047
Service Properties Trust
SVC
$472M
| $88K | ﹤0.01% |
12,548
+1,115
| +10% | +$7.82K |
|
|
EGOV
1048
DELISTED
NIC Inc
EGOV
| $88K | ﹤0.01% |
+3,836
| New | +$88K |
|
1049
Dorman Products
DORM
$4.93B
| $87K | ﹤0.01% |
1,300
+1,000
| +333% | +$66.9K |
|
1050
LendingClub
LC
$1.89B
| $87K | ﹤0.01% |
+19,317
| New | +$87K |
|