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
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
HES
801
PUT
DELISTED
Hess
HES
| $9.66M | 0.01% |
130,500
+15,400
| +13% | +$1.25M |
|
802
PUT
Ally Financial
ALLY
$13.4B
| $9.64M | 0.01% |
202,500
+92,100
| +83% | +$4.56M |
|
803
Dollar General
DG
$25.4B
| $9.62M | 0.01% |
40,784
+32,517
| +393% | +$7.18M |
|
|
BNY
804
CALL
Bank of New York Mellon
BNY
$109B
| $9.59M | 0.01% |
165,200
+109,100
| +194% | +$6.27M |
|
805
PUT
Crocs
CROX
$6.58B
| $9.55M | 0.01% |
74,500
-15,400
| -17% | -$2.37M |
|
806
Newmont
NEM
$101B
| $9.55M | 0.01% |
153,998
+52,776
| +52% | +$2.99M |
|
807
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $9.54M | 0.01% |
161,800
-55,900
| -26% | -$2.8M |
|
808
PUT
Dropbox
DBX
$6.63B
| $9.54M | 0.01% |
388,600
+98,500
| +34% | +$2.65M |
|
|
HAPN
809
CALL
Happen Inc
HAPN
$2.07B
| $9.51M | 0.01% |
393,400
+267,200
| +212% | +$9.05M |
|
810
CALL
Logitech
LOGI
$14.8B
| $9.48M | 0.01% |
115,000
+4,300
| +4% | +$359K |
|
|
FSR
811
CALL
DELISTED
Fisker Inc.
FSR
| $9.48M | 0.01% |
602,800
+95,300
| +19% | +$1.65M |
|
812
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$251M
| $9.45M | 0.01% |
1,567,600
+310,800
| +25% | +$7.92M |
|
|
DISCK
813
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $9.44M | 0.01% |
402,100
+90,500
| +29% | +$2.18M |
|
|
CYBR
814
PUT
DELISTED
CyberArk
CYBR
| $9.41M | 0.01% |
54,300
+30,800
| +131% | +$5.4M |
|
815
Generac Holdings
GNRC
$12.4B
| $9.4M | 0.01% |
26,704
+4,133
| +18% | +$1.71M |
|
816
CALL
Mondelez International
MDLZ
$77.1B
| $9.38M | 0.01% |
141,500
-34,500
| -20% | -$2.13M |
|
817
PUT
Coupang
CPNG
$28.1B
| $9.28M | 0.01% |
316,000
+220,100
| +230% | +$6.2M |
|
818
PUT
ProShares UltraShort Health Care
RXD
$3.3M
| $9.25M | 0.01% |
300,600
+41,100
| +16% | +$1.09M |
|
819
PUT
HP
HPQ
$22.4B
| $9.24M | 0.01% |
245,400
+59,100
| +32% | +$1.93M |
|
820
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $9.24M | 0.01% |
87,400
-38,900
| -31% | -$4.14M |
|
821
CALL
Fiverr
FVRR
$370M
| $9.23M | 0.01% |
81,200
+45,200
| +126% | +$7.05M |
|
|
X
822
DELISTED
US Steel
X
| $9.21M | 0.01% |
386,986
-414,503
| -52% | -$9.77M |
|
823
CALL
Opendoor
OPEN
$3.71B
| $9.14M | 0.01% |
646,453
+433,483
| +204% | +$8.01M |
|
|
824
CALL
Dropbox
DBX
$6.63B
| $9.1M | 0.01% |
370,900
-188,100
| -34% | -$5.06M |
|
825
PUT
Veeva Systems
VEEV
$29.2B
| $9.1M | 0.01% |
35,600
-2,500
| -7% | -$727K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.