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 | |
|---|---|---|---|---|---|---|
|
RDS.A
3826
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $494K | ﹤0.01% |
575,800
+159,700
| +38% | +$7.21M |
|
3827
Keurig Dr Pepper
KDP
$42.3B
| $493K | ﹤0.01% |
+13,386
| New | +$472K |
|
3828
CALL
Saic
SAIC
$5.14B
| $493K | ﹤0.01% |
5,900
-11,300
| -66% | -$982K |
|
|
IDEX
3829
CALL
DELISTED
Ideanomics, Inc. Common Stock
IDEX
| $493K | ﹤0.01% |
3,288
-56
| -2% | -$11.9K |
|
3830
CALL
Ingredion
INGR
$6.48B
| $492K | ﹤0.01% |
5,100
-12,500
| -71% | -$1.2M |
|
3831
CALL
Pitney Bowes
PBI
$2.41B
| $492K | ﹤0.01% |
74,300
-81,800
| -52% | -$580K |
|
3832
CALL
Rogers Corp
ROG
$2.13B
| $491K | ﹤0.01% |
1,800
+1,100
| +157% | +$268K |
|
3833
Willis Towers Watson
WTW
$29.9B
| $491K | ﹤0.01% |
2,069
+2,057
| +17,142% | +$487K |
|
|
JOYY
3834
PUT
JOYY Inc
JOYY
$3.77B
| $490K | ﹤0.01% |
10,800
-5,600
| -34% | -$289K |
|
3835
PUT
Calumet Specialty Products
CLMT
$3.61B
| $489K | ﹤0.01% |
37,100
+12,400
| +50% | +$156K |
|
|
EXK
3836
CALL
Endeavour Silver
EXK
$2.29B
| $489K | ﹤0.01% |
116,100
+17,000
| +17% | +$79.8K |
|
3837
ImmunityBio
IBRX
$7.3B
| $489K | ﹤0.01% |
80,448
+77,108
| +2,309% | +$579K |
|
3838
CALL
Cannae Holdings
CNNE
$665M
| $488K | ﹤0.01% |
13,900
+13,700
| +6,850% | +$454K |
|
3839
CALL
Essential Utilities
WTRG
$11.5B
| $488K | ﹤0.01% |
9,100
-10,100
| -53% | -$490K |
|
|
INBX
3840
DELISTED
Inhibrx, Inc. Common Stock
INBX
| $488K | ﹤0.01% |
+11,190
| New | +$447K |
|
3841
Avnet
AVT
$7.07B
| $487K | ﹤0.01% |
+11,832
| New | +$457K |
|
3842
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.33B
| $487K | ﹤0.01% |
+1,733
| New | +$484K |
|
|
ONC
3843
CALL
BeOne Medicines Ltd
ONC
$34.3B
| $487K | ﹤0.01% |
1,800
+1,200
| +200% | +$405K |
|
|
APRN
3844
PUT
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $487K | ﹤0.01% |
6,033
-15,117
| -71% | -$1.57M |
|
3845
CALL
Destination XL Group
DXLG
$34.3M
| $486K | ﹤0.01% |
+85,700
| New | +$578K |
|
3846
Toyota
TM
$221B
| $486K | ﹤0.01% |
+2,624
| New | +$472K |
|
|
LTC
3847
CALL
LTC Properties
LTC
$2.14B
| $484K | ﹤0.01% |
14,200
| – | – |
|
3848
CALL
Sociedad Química y Minera de Chile
SQM
$19.1B
| $484K | ﹤0.01% |
9,600
-18,000
| -65% | -$1.03M |
|
3849
PUT
Kyndryl
KD
$2.94B
| $483K | ﹤0.01% |
+26,700
| New | +$576K |
|
|
ECOM
3850
PUT
DELISTED
CHANNELADVISOR CORPORATION
ECOM
| $483K | ﹤0.01% |
19,600
+17,000
| +654% | +$436K |
|
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.