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 | |
|---|---|---|---|---|---|---|
|
JNPR
776
CALL
DELISTED
Juniper Networks
JNPR
| $10.2M | 0.01% |
286,100
+161,200
| +129% | +$5.04M |
|
777
PUT
Seagate
STX
$207B
| $10.2M | 0.01% |
90,100
-359,200
| -80% | -$34.9M |
|
|
MRO
778
PUT
DELISTED
Marathon Oil Corporation
MRO
| $10.2M | 0.01% |
619,600
+248,400
| +67% | +$3.99M |
|
779
Bristol-Myers Squibb
BMY
$126B
| $10.2M | 0.01% |
163,114
+65,017
| +66% | +$3.81M |
|
780
CALL
Hertz
HTZ
$603M
| $10.1M | 0.01% |
+578,500
| New | +$13.8M |
|
781
PUT
KB Home
KBH
$3.41B
| $10.1M | 0.01% |
225,500
+14,200
| +7% | +$594K |
|
782
IBM
IBM
$194B
| $10.1M | 0.01% |
75,206
+32,028
| +74% | +$4.02M |
|
783
CALL
ProShares Ultra S&P500
SSO
$7.82B
| $10M | 0.01% |
384,400
-92,800
| -19% | -$3.17M |
|
784
Electronic Arts
EA
$52.4B
| $10M | 0.01% |
76,070
+62,171
| +447% | +$8.36M |
|
785
State Street Technology Select Sector SPDR ETF
XLK
$116B
| $10M | 0.01% |
115,300
-89,322
| -44% | -$7.36M |
|
786
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $9.97M | 0.01% |
1,245,000
+693,300
| +126% | +$6.26M |
|
787
CALL
Nokia
NOK
$54.3B
| $9.9M | 0.01% |
1,591,500
-1,935,100
| -55% | -$11.3M |
|
788
CALL
FuboTV Inc
FUBO
$254M
| $9.9M | 0.01% |
53,142
-18,475
| -26% | -$5.19M |
|
|
FISV
789
PUT
Fiserv Inc
FISV
$26.6B
| $9.87M | 0.01% |
95,100
+1,600
| +2% | +$165K |
|
790
Palo Alto Networks
PANW
$265B
| $9.86M | 0.01% |
106,284
+87,888
| +478% | +$7.6M |
|
791
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $9.85M | 0.01% |
15,600
-17,200
| -52% | -$10.6M |
|
792
PUT
Opendoor
OPEN
$3.71B
| $9.83M | 0.01% |
695,330
+407,237
| +141% | +$7.53M |
|
793
CALL
Valero Energy
VLO
$90.6B
| $9.83M | 0.01% |
130,900
-44,900
| -26% | -$3.34M |
|
794
MGM Resorts International
MGM
$11.5B
| $9.79M | 0.01% |
+218,136
| New | +$9.79M |
|
795
PUT
Halliburton
HAL
$27.3B
| $9.79M | 0.01% |
428,000
+118,800
| +38% | +$2.81M |
|
796
CALL
EPAM Systems
EPAM
$4.5B
| $9.76M | 0.01% |
14,600
+6,800
| +87% | +$4.38M |
|
797
PUT
PG&E
PCG
$38.6B
| $9.74M | 0.01% |
802,700
+609,500
| +315% | +$7.14M |
|
798
CALL
Duke Energy
DUK
$101B
| $9.71M | 0.01% |
92,600
+11,200
| +14% | +$1.14M |
|
799
PUT
CSX Corp
CSX
$98.1B
| $9.69M | 0.01% |
257,800
-15,800
| -6% | -$557K |
|
800
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $9.66M | 0.01% |
107,300
+74,800
| +230% | +$6.39M |
|
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.