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 | |
|---|---|---|---|---|---|---|
|
CAN
1901
CALL
Canaan Creative
CAN
$176M
| $2.29M | ﹤0.01% |
444,500
+125,900
| +40% | +$947K |
|
1902
PUT
CEVA Inc
CEVA
$1.01B
| $2.29M | ﹤0.01% |
52,900
+49,900
| +1,663% | +$2.23M |
|
1903
PUT
Viatris
VTRS
$20.1B
| $2.28M | ﹤0.01% |
168,600
-38,500
| -19% | -$514K |
|
1904
PUT
Lakeland Industries
LAKE
$106M
| $2.28M | ﹤0.01% |
104,900
+19,700
| +23% | +$403K |
|
1905
Calix
CALX
$2.27B
| $2.27M | ﹤0.01% |
28,336
+8,190
| +41% | +$535K |
|
|
NOVA
1906
DELISTED
Sunnova Energy
NOVA
| $2.27M | ﹤0.01% |
81,196
+75,668
| +1,369% | +$2.73M |
|
1907
CALL
TAL Education Group
TAL
$5.71B
| $2.26M | ﹤0.01% |
575,300
-41,100
| -7% | -$186K |
|
1908
PUT
Ginkgo Bioworks
DNA
$481M
| $2.26M | ﹤0.01% |
+6,798
| New | +$3.23M |
|
1909
CALL
Ralph Lauren
RL
$22.2B
| $2.26M | ﹤0.01% |
19,000
-3,100
| -14% | -$372K |
|
1910
PUT
Conagra Brands
CAG
$7.07B
| $2.26M | ﹤0.01% |
66,100
+36,200
| +121% | +$1.19M |
|
|
1911
PUT
Calix
CALX
$2.27B
| $2.25M | ﹤0.01% |
28,200
+21,700
| +334% | +$1.42M |
|
1912
CALL
Danaos Corp
DAC
$2.55B
| $2.25M | ﹤0.01% |
30,200
+9,600
| +47% | +$693K |
|
1913
PUT
Cinemark Holdings
CNK
$3.82B
| $2.25M | ﹤0.01% |
139,800
+29,300
| +27% | +$548K |
|
1914
CALL
Renaissance IPO ETF
IPO
$154M
| $2.25M | ﹤0.01% |
38,900
+15,000
| +63% | +$953K |
|
1915
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $2.25M | ﹤0.01% |
13,100
-7,600
| -37% | -$1.25M |
|
1916
iShares S&P 500 Growth ETF
IVW
$72.5B
| $2.25M | ﹤0.01% |
+26,837
| New | +$2.16M |
|
1917
CALL
Macerich
MAC
$7.32B
| $2.24M | ﹤0.01% |
129,500
-81,200
| -39% | -$1.52M |
|
1918
PUT
Sprouts Farmers Market
SFM
$7.04B
| $2.24M | ﹤0.01% |
75,400
-56,800
| -43% | -$1.42M |
|
1919
PUT
Nutanix
NTNX
$14.9B
| $2.23M | ﹤0.01% |
70,100
-189,500
| -73% | -$6.5M |
|
1920
CALL
Clean Energy Fuels
CLNE
$447M
| $2.23M | ﹤0.01% |
364,200
-240,500
| -40% | -$1.89M |
|
1921
PUT
Amplify Online Retail ETF
IBUY
$106M
| $2.23M | ﹤0.01% |
56,900
+5,300
| +10% | +$544K |
|
1922
Aptiv
APTV
$12B
| $2.23M | ﹤0.01% |
13,501
+9,173
| +212% | +$1.53M |
|
1923
CALL
Deutsche Bank
DB
$66.3B
| $2.23M | ﹤0.01% |
178,100
-116,600
| -40% | -$1.49M |
|
1924
Direxion Daily Homebuilders & Supplies Bull 3X ETF
NAIL
$580M
| $2.22M | ﹤0.01% |
+17,971
| New | +$1.73M |
|
|
BENE
1925
CALL
DELISTED
Benessere Capital Acquisition Corp. Class A Common Stock
BENE
| $2.22M | ﹤0.01% |
+219,400
| New | +$2.27M |
|
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.