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 | |
|---|---|---|---|---|---|---|
5326
PUT
Penske Automotive Group
PAG
$14.3B
| $182K | ﹤0.01% |
1,700
-14,800
| -90% | -$1.55M |
|
5327
CALL
Dine Brands
DIN
$456M
| $181K | ﹤0.01% |
2,400
-2,800
| -54% | -$227K |
|
5328
Enanta Pharmaceuticals
ENTA
$366M
| $181K | ﹤0.01% |
+2,428
| New | +$191K |
|
5329
Gossamer Bio
GOSS
$82.9M
| $181K | ﹤0.01% |
+16,029
| New | +$190K |
|
5330
PUT
Limoneira
LMNR
$235M
| $181K | ﹤0.01% |
+12,100
| New | +$190K |
|
5331
PUT
MDU Resources
MDU
$4.17B
| $181K | ﹤0.01% |
15,516
| – | – |
|
5332
CALL
NerdWallet
NRDS
$592M
| $181K | ﹤0.01% |
+11,700
| New | +$229K |
|
5333
PUT
Ryder
R
$9.83B
| $181K | ﹤0.01% |
2,200
-9,100
| -81% | -$763K |
|
5334
CALL
Clear Secure
YOU
$5.57B
| $181K | ﹤0.01% |
+5,800
| New | +$214K |
|
|
ECOM
5335
DELISTED
CHANNELADVISOR CORPORATION
ECOM
| $181K | ﹤0.01% |
7,367
+3,023
| +70% | +$77.5K |
|
|
QIWI
5336
DELISTED
QIWI PLC
QIWI
| $181K | ﹤0.01% |
22,757
+7,212
| +46% | +$61.5K |
|
5337
PUT
Affiliated Managers Group
AMG
$9.69B
| $180K | ﹤0.01% |
1,100
+900
| +450% | +$151K |
|
5338
Clearway Energy Class C
CWEN
$4.94B
| $180K | ﹤0.01% |
+5,010
| New | +$177K |
|
5339
Huntington Bancshares
HBAN
$34.4B
| $180K | ﹤0.01% |
11,687
-13,766
| -54% | -$217K |
|
5340
NeoGenomics
NEO
$1.96B
| $180K | ﹤0.01% |
5,278
+2,742
| +108% | +$107K |
|
|
PCH
5341
PUT
DELISTED
PotlatchDeltic
PCH
| $180K | ﹤0.01% |
3,000
-200
| -6% | -$11.2K |
|
5342
PUT
Tradeweb Markets
TW
$21.4B
| $180K | ﹤0.01% |
1,800
+900
| +100% | +$83K |
|
|
VBIV
5343
CALL
DELISTED
VBI Vaccines, Inc. New Common Stock (Canada)
VBIV
| $180K | ﹤0.01% |
2,567
-3,943
| -61% | -$332K |
|
|
ML
5344
PUT
DELISTED
MoneyLion Inc.
ML
| $180K | ﹤0.01% |
1,497
-883
| -37% | -$136K |
|
|
ESTE
5345
CALL
DELISTED
Earthstone Energy Inc. Class A Common Stock
ESTE
| $180K | ﹤0.01% |
16,500
+9,200
| +126% | +$98.1K |
|
5346
CALL
Ardelyx
ARDX
$1.22B
| $179K | ﹤0.01% |
163,200
+82,300
| +102% | +$97.7K |
|
5347
CALL
Clean Harbors
CLH
$16.5B
| $179K | ﹤0.01% |
1,800
-200
| -10% | -$21.1K |
|
5348
PUT
Golar LNG
GLNG
$5B
| $179K | ﹤0.01% |
14,500
+3,400
| +31% | +$43.3K |
|
5349
Liberty Energy
LBRT
$3.05B
| $179K | ﹤0.01% |
18,556
+9,880
| +114% | +$115K |
|
|
NSA
5350
CALL
DELISTED
National Storage Affiliates Trust
NSA
| $179K | ﹤0.01% |
2,600
+500
| +24% | +$30.9K |
|
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.