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 | |
|---|---|---|---|---|---|---|
|
RADI
2326
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $1.55M | ﹤0.01% |
+96,048
| New | +$1.62M |
|
|
BMTX
2327
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $1.54M | ﹤0.01% |
+167,500
| New | +$1.67M |
|
2328
PUT
Newmark Group
NMRK
$2.73B
| $1.54M | ﹤0.01% |
82,400
+80,800
| +5,050% | +$1.29M |
|
2329
EOG Resources
EOG
$78B
| $1.54M | ﹤0.01% |
17,320
-2,785
| -14% | -$250K |
|
|
MFA
2330
PUT
MFA Financial
MFA
$929M
| $1.54M | ﹤0.01% |
84,300
+12,650
| +18% | +$230K |
|
|
RAD
2331
CALL
DELISTED
Rite Aid Corporation
RAD
| $1.53M | ﹤0.01% |
104,500
+19,300
| +23% | +$260K |
|
2332
CALL
Energy Fuels
UUUU
$2.82B
| $1.53M | ﹤0.01% |
200,400
+65,100
| +48% | +$551K |
|
|
AMRS
2333
PUT
DELISTED
Amyris Inc.
AMRS
| $1.53M | ﹤0.01% |
282,800
+24,200
| +9% | +$226K |
|
2334
PUT
Cboe Global Markets
CBOE
$29.8B
| $1.52M | ﹤0.01% |
11,700
-43,700
| -79% | -$5.64M |
|
|
SUM
2335
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $1.52M | ﹤0.01% |
38,646
-1,220
| -3% | -$44.7K |
|
2336
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $1.52M | ﹤0.01% |
17,900
+7,900
| +79% | +$727K |
|
2337
PUT
IQVIA
IQV
$34.7B
| $1.52M | ﹤0.01% |
5,400
+3,500
| +184% | +$908K |
|
2338
CALL
Equinix
EQIX
$107B
| $1.52M | ﹤0.01% |
1,800
-100
| -5% | -$80.2K |
|
|
BPMC
2339
CALL
DELISTED
Blueprint Medicines
BPMC
| $1.52M | ﹤0.01% |
14,200
+13,100
| +1,191% | +$1.37M |
|
2340
PUT
Flowserve
FLS
$9.25B
| $1.52M | ﹤0.01% |
49,700
+33,500
| +207% | +$1.11M |
|
2341
PUT
Casey's General Stores
CASY
$31.9B
| $1.52M | ﹤0.01% |
7,700
+5,600
| +267% | +$1.08M |
|
2342
Arrowhead Research
ARWR
$12.1B
| $1.52M | ﹤0.01% |
22,902
-9,409
| -29% | -$646K |
|
2343
PUT
Ocugen
OCGN
$410M
| $1.51M | ﹤0.01% |
331,200
-154,700
| -32% | -$1.17M |
|
2344
PUT
Gartner
IT
$9.41B
| $1.5M | ﹤0.01% |
4,500
-8,400
| -65% | -$2.7M |
|
2345
Dell
DELL
$283B
| $1.5M | ﹤0.01% |
26,769
-33,175
| -55% | -$1.85M |
|
2346
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $1.5M | ﹤0.01% |
7,200
+4,400
| +157% | +$324K |
|
2347
PUT
Simmons First National
SFNC
$3.35B
| $1.5M | ﹤0.01% |
+50,800
| New | +$1.54M |
|
2348
CALL
Vishay Intertechnology
VSH
$5.86B
| $1.5M | ﹤0.01% |
68,700
+56,900
| +482% | +$1.17M |
|
2349
CALL
Hormel Foods
HRL
$13.9B
| $1.5M | ﹤0.01% |
30,700
-14,500
| -32% | -$636K |
|
2350
PUT
CoreCivic
CXW
$3.1B
| $1.5M | ﹤0.01% |
150,100
-13,600
| -8% | -$135K |
|
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.