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 | |
|---|---|---|---|---|---|---|
|
CRON
2076
CALL
Cronos Group
CRON
$1.05B
| $1.94M | ﹤0.01% |
496,100
+390,000
| +368% | +$1.95M |
|
2077
CALL
Editas Medicine
EDIT
$399M
| $1.94M | ﹤0.01% |
73,100
-17,500
| -19% | -$602K |
|
2078
Pfizer
PFE
$140B
| $1.94M | ﹤0.01% |
32,862
-36,598
| -53% | -$1.81M |
|
2079
Cintas
CTAS
$82.4B
| $1.94M | ﹤0.01% |
+17,508
| New | +$1.89M |
|
2080
Jabil
JBL
$32.8B
| $1.94M | ﹤0.01% |
+27,549
| New | +$1.74M |
|
2081
Robinhood
HOOD
$85.2B
| $1.93M | ﹤0.01% |
+108,943
| New | +$3.35M |
|
2082
PUT
Group 1 Automotive
GPI
$3.94B
| $1.93M | ﹤0.01% |
9,900
+8,900
| +890% | +$1.73M |
|
2083
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $1.93M | ﹤0.01% |
97,200
-381,500
| -80% | -$8.2M |
|
|
PARA
2084
CALL
DELISTED
Paramount Global Class B
PARA
| $1.93M | ﹤0.01% |
2,284,200
-1,400,400
| -38% | -$48.3M |
|
|
AGNT
2085
CALL
AGNT Inc
AGNT
$664M
| $1.93M | ﹤0.01% |
57,200
+10,100
| +21% | +$416K |
|
2086
Carrier Global
CARR
$57.2B
| $1.92M | ﹤0.01% |
35,458
+8,105
| +30% | +$437K |
|
2087
Clorox
CLX
$11.6B
| $1.92M | ﹤0.01% |
+11,021
| New | +$1.84M |
|
2088
CALL
Papa John's
PZZA
$999M
| $1.92M | ﹤0.01% |
14,400
+10,600
| +279% | +$1.36M |
|
2089
CALL
Celldex Therapeutics
CLDX
$2.77B
| $1.92M | ﹤0.01% |
49,700
+48,400
| +3,723% | +$2.11M |
|
2090
Global X Lithium & Battery Tech ETF
LIT
$1.49B
| $1.92M | ﹤0.01% |
22,735
-47,924
| -68% | -$4.25M |
|
2091
CALL
Baxter International
BAX
$11.6B
| $1.91M | ﹤0.01% |
22,300
+1,600
| +8% | +$129K |
|
2092
CALL
PTC
PTC
$13.7B
| $1.91M | ﹤0.01% |
15,800
+14,100
| +829% | +$1.7M |
|
2093
PUT
Regency Centers
REG
$15B
| $1.91M | ﹤0.01% |
25,400
-87,500
| -78% | -$6.31M |
|
2094
PUT
F5
FFIV
$22.1B
| $1.91M | ﹤0.01% |
7,800
-5,700
| -42% | -$1.27M |
|
2095
UiPath
PATH
$5.62B
| $1.91M | ﹤0.01% |
44,201
+10,550
| +31% | +$520K |
|
2096
3D Systems Corp
DDD
$420M
| $1.9M | ﹤0.01% |
88,405
+42,459
| +92% | +$1.07M |
|
2097
Philips
PHG
$25.4B
| $1.9M | ﹤0.01% |
+62,402
| New | +$2.12M |
|
2098
PUT
Workhorse Group
WKHS
$29.5M
| $1.9M | ﹤0.01% |
145
-137
| -49% | -$2.49M |
|
|
WRK
2099
PUT
DELISTED
WestRock Company
WRK
| $1.9M | ﹤0.01% |
42,800
-36,400
| -46% | -$1.71M |
|
2100
CALL
Atmos Energy
ATO
$29.9B
| $1.9M | ﹤0.01% |
18,100
-32,400
| -64% | -$3.07M |
|
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.