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 | |
|---|---|---|---|---|---|---|
4201
CALL
The Joint Corp
JYNT
$119M
| $381K | ﹤0.01% |
5,800
+2,500
| +76% | +$202K |
|
4202
PUT
Lloyds Banking Group
LYG
$85.2B
| $381K | ﹤0.01% |
149,800
+51,500
| +52% | +$131K |
|
|
VIVO
4203
CALL
DELISTED
Meridian Bioscience Inc
VIVO
| $381K | ﹤0.01% |
18,700
-8,600
| -32% | -$165K |
|
4204
CAE Inc. Common Shares
CAE
$8.44B
| $380K | ﹤0.01% |
15,077
+14,636
| +3,319% | +$408K |
|
4205
CALL
Motorola Solutions
MSI
$72.1B
| $380K | ﹤0.01% |
1,400
-2,400
| -63% | -$604K |
|
4206
PUT
Nu Holdings
NU
$67.8B
| $380K | ﹤0.01% |
+40,600
| New | +$399K |
|
4207
Riskified
RSKD
$719M
| $380K | ﹤0.01% |
+48,429
| New | +$692K |
|
4208
PUT
CoStar Group
CSGP
$12.2B
| $379K | ﹤0.01% |
4,800
-50,300
| -91% | -$4.22M |
|
4209
PUT
Jabil
JBL
$30.1B
| $379K | ﹤0.01% |
5,400
-6,600
| -55% | -$417K |
|
|
MOMO
4210
PUT
Hello Group
MOMO
$867M
| $379K | ﹤0.01% |
42,300
-100,200
| -70% | -$1.15M |
|
|
DMTK
4211
DELISTED
DermTech, Inc. Common Stock
DMTK
| $379K | ﹤0.01% |
24,028
+15,362
| +177% | +$369K |
|
|
BCTXW
4212
CALL
DELISTED
BriaCell Therapeutics Corp Warrant
BCTXW
| $378K | ﹤0.01% |
+45,700
| New | +$216K |
|
4213
PUT
United States Copper Index Fund
CPER
$742M
| $378K | ﹤0.01% |
13,900
-25,500
| -65% | -$682K |
|
|
CTLP
4214
DELISTED
Cantaloupe
CTLP
| $377K | ﹤0.01% |
+42,556
| New | +$424K |
|
4215
Karyopharm Therapeutics
KPTI
$155M
| $377K | ﹤0.01% |
+3,916
| New | +$390K |
|
|
ASTR
4216
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $377K | ﹤0.01% |
3,629
+641
| +21% | +$88K |
|
|
DOOR
4217
CALL
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $377K | ﹤0.01% |
+3,200
| New | +$366K |
|
4218
CALL
Costamare
CMRE
$1.85B
| $376K | ﹤0.01% |
29,800
+5,900
| +25% | +$77.2K |
|
|
JAMF
4219
PUT
DELISTED
Jamf
JAMF
| $376K | ﹤0.01% |
9,900
+800
| +9% | +$31K |
|
4220
Hyatt Hotels
H
$17.5B
| $375K | ﹤0.01% |
+3,912
| New | +$334K |
|
4221
PUT
Herc Holdings
HRI
$4.78B
| $375K | ﹤0.01% |
2,400
-1,000
| -29% | -$176K |
|
|
LAND
4222
Gladstone Land Corp
LAND
$365M
| $375K | ﹤0.01% |
+11,115
| New | +$299K |
|
|
RENT
4223
CALL
Rent the Runway
RENT
$124M
| $375K | ﹤0.01% |
+2,305
| New | +$614K |
|
4224
Sportsman's Warehouse
SPWH
$44.9M
| $375K | ﹤0.01% |
+31,837
| New | +$500K |
|
4225
PUT
Vuzix
VUZI
$178M
| $375K | ﹤0.01% |
43,300
-64,800
| -60% | -$700K |
|
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.