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 | |
|---|---|---|---|---|---|---|
1876
BioMarin Pharmaceuticals
BMRN
$11.5B
| $2.34M | ﹤0.01% |
26,465
+14,151
| +115% | +$1.17M |
|
1877
PUT
GlobalFoundries
GFS
$29.4B
| $2.34M | ﹤0.01% |
+36,000
| New | +$2.23M |
|
1878
CALL
Citizens Financial Group
CFG
$30.4B
| $2.34M | ﹤0.01% |
146,700
+92,400
| +170% | +$4.45M |
|
|
DQ
1879
Daqo New Energy
DQ
$790M
| $2.34M | ﹤0.01% |
57,964
+18,185
| +46% | +$1.06M |
|
1880
PUT
Arqit Quantum
ARQQ
$290M
| $2.33M | ﹤0.01% |
+3,900
| New | +$2.17M |
|
1881
Goodyear
GT
$2.07B
| $2.33M | ﹤0.01% |
109,530
+94,115
| +611% | +$1.95M |
|
1882
CALL
XPO
XPO
$25B
| $2.33M | ﹤0.01% |
54,698
+28,107
| +106% | +$1.31M |
|
|
CERN
1883
DELISTED
Cerner Corp
CERN
| $2.33M | ﹤0.01% |
+25,103
| New | +$1.91M |
|
1884
Vanguard Short-Term Inflation-Protected Securities Index Fund
VTIP
$19.1B
| $2.33M | ﹤0.01% |
+45,331
| New | +$2.36M |
|
1885
CALL
New York Times
NYT
$11.6B
| $2.33M | ﹤0.01% |
48,200
-7,500
| -13% | -$370K |
|
1886
CALL
Cinemark Holdings
CNK
$3.82B
| $2.33M | ﹤0.01% |
144,400
+22,900
| +19% | +$429K |
|
|
HZNP
1887
CALL
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $2.33M | ﹤0.01% |
21,600
-4,800
| -18% | -$524K |
|
1888
CALL
Ginkgo Bioworks
DNA
$481M
| $2.32M | ﹤0.01% |
+6,988
| New | +$3.32M |
|
1889
Kulicke & Soffa
KLIC
$5.3B
| $2.32M | ﹤0.01% |
38,345
+36,845
| +2,456% | +$2.11M |
|
1890
PUT
GDS Holdings
GDS
$6.34B
| $2.32M | ﹤0.01% |
49,200
-5,500
| -10% | -$303K |
|
1891
CALL
UBS Group
UBS
$170B
| $2.31M | ﹤0.01% |
129,400
+76,500
| +145% | +$1.35M |
|
1892
CALL
Ball Corp
BALL
$17B
| $2.31M | ﹤0.01% |
24,000
+14,900
| +164% | +$1.38M |
|
1893
Synchrony
SYF
$23.7B
| $2.31M | ﹤0.01% |
49,764
+46,177
| +1,287% | +$2.22M |
|
1894
CALL
BorgWarner
BWA
$13.2B
| $2.31M | ﹤0.01% |
58,277
+37,403
| +179% | +$1.5M |
|
1895
Corteva
CTVA
$59.7B
| $2.31M | ﹤0.01% |
48,758
+4,711
| +11% | +$215K |
|
|
JWN
1896
DELISTED
Nordstrom
JWN
| $2.31M | ﹤0.01% |
101,903
+11,058
| +12% | +$293K |
|
1897
CALL
Marqeta
MQ
$1.8B
| $2.31M | ﹤0.01% |
+33,575
| New | +$3M |
|
|
XLNX
1898
CALL
DELISTED
Xilinx Inc
XLNX
| $2.3M | ﹤0.01% |
71,900
+57,100
| +386% | +$11.3M |
|
1899
American International
AIG
$41.9B
| $2.3M | ﹤0.01% |
40,461
+24,194
| +149% | +$1.38M |
|
1900
PUT
Banco Bradesco
BBD
$38.1B
| $2.3M | ﹤0.01% |
821,900
+246,103
| +43% | +$814K |
|
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.