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 | |
|---|---|---|---|---|---|---|
3126
ProPetro Holding
PUMP
$1.32B
| $826K | ﹤0.01% |
102,082
-28,025
| -22% | -$255K |
|
3127
CALL
Boot Barn
BOOT
$4.71B
| $824K | ﹤0.01% |
6,700
-14,400
| -68% | -$1.63M |
|
3128
State Street SPDR S&P Insurance ETF
KIE
$654M
| $824K | ﹤0.01% |
+20,426
| New | +$818K |
|
3129
CALL
Clarivate
CLVT
$1.36B
| $823K | ﹤0.01% |
35,000
-700
| -2% | -$16.2K |
|
3130
Paysafe
PSFE
$440M
| $823K | ﹤0.01% |
17,545
+16,015
| +1,047% | +$1.07M |
|
|
RBAC
3131
DELISTED
RedBall Acquisition Corp.
RBAC
| $823K | ﹤0.01% |
+83,055
| New | +$830K |
|
3132
CALL
Abercrombie & Fitch
ANF
$4.41B
| $821K | ﹤0.01% |
23,600
-11,500
| -33% | -$449K |
|
3133
CALL
Ecolab
ECL
$76.4B
| $821K | ﹤0.01% |
3,500
-2,900
| -45% | -$655K |
|
|
MMP
3134
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $821K | ﹤0.01% |
17,700
+400
| +2% | +$18.9K |
|
3135
PUT
Companhia Siderúrgica Nacional
SID
$1.49B
| $820K | ﹤0.01% |
184,800
+173,300
| +1,507% | +$753K |
|
3136
PUT
Bumble
BMBL
$386M
| $819K | ﹤0.01% |
24,200
-14,000
| -37% | -$596K |
|
|
OLPX
3137
PUT
DELISTED
Olaplex Holdings
OLPX
| $818K | ﹤0.01% |
+28,100
| New | +$746K |
|
3138
CALL
XWELL
XWEL
$8.95M
| $818K | ﹤0.01% |
20,265
-2,375
| -10% | -$75.3K |
|
|
ZYXI
3139
CALL
DELISTED
Zynex
ZYXI
| $818K | ﹤0.01% |
90,310
-66,770
| -43% | -$741K |
|
3140
PUT
Surgery Partners
SGRY
$1.98B
| $817K | ﹤0.01% |
15,300
+13,300
| +665% | +$617K |
|
3141
CALL
Citi Trends
CTRN
$543M
| $814K | ﹤0.01% |
8,600
+2,100
| +32% | +$168K |
|
|
HEES
3142
PUT
DELISTED
H&E Equipment Services
HEES
| $814K | ﹤0.01% |
18,400
+18,300
| +18,300% | +$798K |
|
3143
PUT
Hartford Financial Services
HIG
$38.4B
| $814K | ﹤0.01% |
11,800
-4,400
| -27% | -$310K |
|
3144
PUT
Southern Copper
SCCO
$141B
| $814K | ﹤0.01% |
14,239
-54,259
| -79% | -$3.03M |
|
3145
CALL
Green Plains
GPRE
$1.15B
| $813K | ﹤0.01% |
23,400
-21,600
| -48% | -$803K |
|
3146
Trane Technologies
TT
$107B
| $812K | ﹤0.01% |
+4,023
| New | +$757K |
|
3147
PUT
Aon
AON
$78.4B
| $811K | ﹤0.01% |
2,700
-43,800
| -94% | -$13.1M |
|
3148
NovoCure
NVCR
$1.97B
| $811K | ﹤0.01% |
10,807
+1,475
| +16% | +$148K |
|
3149
Invesco DB US Dollar Index Bearish Fund
UDN
$107M
| $811K | ﹤0.01% |
40,076
-798
| -2% | -$16.3K |
|
3150
CALL
Globalstar
GSAT
$10.2B
| $810K | ﹤0.01% |
46,593
-17,100
| -27% | -$375K |
|
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.