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 | |
|---|---|---|---|---|---|---|
3776
PUT
Mettler-Toledo International
MTD
$28.1B
| $509K | ﹤0.01% |
300
-2,800
| -90% | -$4.23M |
|
|
BIG
3777
CALL
DELISTED
Big Lots, Inc.
BIG
| $509K | ﹤0.01% |
11,300
-41,000
| -78% | -$1.87M |
|
|
AMWD
3778
PUT
DELISTED
American Woodmark
AMWD
| $508K | ﹤0.01% |
+7,800
| New | +$528K |
|
3779
Equitable Holdings
EQH
$13.5B
| $508K | ﹤0.01% |
15,501
+15,189
| +4,868% | +$499K |
|
3780
CALL
First American
FAF
$8.08B
| $508K | ﹤0.01% |
6,500
+6,100
| +1,525% | +$455K |
|
3781
CALL
FB Financial Corp
FBK
$2.98B
| $508K | ﹤0.01% |
11,600
+9,800
| +544% | +$439K |
|
|
BFX
3782
PUT
DELISTED
BowFlex Inc.
BFX
| $508K | ﹤0.01% |
82,900
-90,200
| -52% | -$748K |
|
3783
CALL
Bentley Systems
BSY
$10.9B
| $507K | ﹤0.01% |
10,500
-4,000
| -28% | -$216K |
|
3784
PUT
Atossa Therapeutics
ATOS
$24.1M
| $506K | ﹤0.01% |
21,113
+2,833
| +15% | +$104K |
|
3785
CALL
Entergy
ETR
$52.4B
| $506K | ﹤0.01% |
9,000
-19,400
| -68% | -$1.02M |
|
3786
National Beverage
FIZZ
$3.05B
| $506K | ﹤0.01% |
11,181
-9,441
| -46% | -$514K |
|
3787
PUT
ImmunityBio
IBRX
$7.3B
| $506K | ﹤0.01% |
83,300
+24,200
| +41% | +$182K |
|
3788
PUT
Katapult Holdings
KPLT
$31.9M
| $506K | ﹤0.01% |
6,016
+2,940
| +96% | +$308K |
|
3789
CALL
Rapid7
RPD
$642M
| $506K | ﹤0.01% |
4,300
+2,400
| +126% | +$296K |
|
|
RETA
3790
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $506K | ﹤0.01% |
19,200
+17,200
| +860% | +$1.33M |
|
|
COHR
3791
CALL
DELISTED
Coherent Inc
COHR
| $506K | ﹤0.01% |
1,900
-300
| -14% | -$77.4K |
|
3792
CALL
Diodes
DIOD
$3.69B
| $505K | ﹤0.01% |
4,600
+2,900
| +171% | +$294K |
|
3793
CALL
TFS Financial
TFSL
$5.18B
| $505K | ﹤0.01% |
28,300
-3,700
| -12% | -$70.6K |
|
|
HSII
3794
DELISTED
Heidrick & Struggles
HSII
| $504K | ﹤0.01% |
11,545
+11,272
| +4,129% | +$513K |
|
3795
PUT
Mercury Insurance
MCY
$6.07B
| $504K | ﹤0.01% |
9,500
+8,900
| +1,483% | +$478K |
|
|
AY
3796
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $504K | ﹤0.01% |
14,100
-15,500
| -52% | -$581K |
|
3797
PUT
Coeur Mining
CDE
$15.4B
| $503K | ﹤0.01% |
99,900
+13,200
| +15% | +$79.3K |
|
|
OSH
3798
CALL
DELISTED
Oak Street Health, Inc.
OSH
| $503K | ﹤0.01% |
15,200
-46,400
| -75% | -$1.76M |
|
|
GSKY
3799
CALL
DELISTED
GreenSky, Inc. Class A Common Stock
GSKY
| $503K | ﹤0.01% |
44,300
+3,700
| +9% | +$43.4K |
|
3800
PUT
Array Technologies
ARRY
$785M
| $502K | ﹤0.01% |
32,000
-41,000
| -56% | -$802K |
|
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.