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 | |
|---|---|---|---|---|---|---|
851
PUT
Weyerhaeuser
WY
$17B
| $8.82M | 0.01% |
214,300
-98,000
| -31% | -$3.72M |
|
852
CALL
Corpay
CPAY
$23.8B
| $8.82M | 0.01% |
39,400
+32,900
| +506% | +$7.86M |
|
853
PUT
GSK
GSK
$102B
| $8.81M | 0.01% |
159,920
+75,920
| +90% | +$3.95M |
|
854
CALL
RingCentral
RNG
$3.24B
| $8.8M | 0.01% |
47,000
+26,000
| +124% | +$5.77M |
|
855
PUT
Emerson Electric
EMR
$81.2B
| $8.79M | 0.01% |
94,500
+64,000
| +210% | +$6.03M |
|
856
CALL
SAP
SAP
$171B
| $8.78M | 0.01% |
62,700
-26,500
| -30% | -$3.7M |
|
857
Qualcomm
QCOM
$180B
| $8.78M | 0.01% |
47,988
-5,086
| -10% | -$814K |
|
858
PUT
Canadian Pacific Kansas City
CP
$82B
| $8.77M | 0.01% |
121,900
-25,600
| -17% | -$1.87M |
|
859
CALL
Cognizant
CTSH
$20.3B
| $8.77M | 0.01% |
98,800
+39,000
| +65% | +$3.14M |
|
860
PUT
InMode
INMD
$867M
| $8.74M | 0.01% |
123,900
+46,500
| +60% | +$3.73M |
|
861
CALL
Fortinet
FTNT
$111B
| $8.73M | 0.01% |
121,500
+42,500
| +54% | +$2.8M |
|
862
PUT
Valero Energy
VLO
$90.6B
| $8.68M | 0.01% |
115,600
-81,300
| -41% | -$6.05M |
|
863
PUT
Tilray
TLRY
$493M
| $8.67M | 0.01% |
123,380
-43,960
| -26% | -$4.42M |
|
864
PUT
Rocket Companies
RKT
$36.2B
| $8.66M | 0.01% |
618,900
-658,800
| -52% | -$10.5M |
|
865
CALL
Wolfspeed
WOLF
$1.35B
| $8.66M | 0.01% |
77,500
+16,000
| +26% | +$1.78M |
|
866
HubSpot
HUBS
$9.73B
| $8.64M | 0.01% |
13,115
+8,169
| +165% | +$6.18M |
|
|
FLNA
867
CALL
Filana Therapeutics
FLNA
$45M
| $8.64M | 0.01% |
197,700
+91,900
| +87% | +$4.82M |
|
868
PUT
American International
AIG
$41.4B
| $8.64M | 0.01% |
151,900
+3,700
| +2% | +$211K |
|
869
PUT
Yum! Brands
YUM
$40.6B
| $8.62M | 0.01% |
62,100
+52,000
| +515% | +$6.65M |
|
|
UCD
870
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $8.62M | 0.01% |
204,900
+51,700
| +34% | +$2.17M |
|
871
PUT
EQT Corp
EQT
$33.4B
| $8.61M | 0.01% |
394,900
+329,600
| +505% | +$6.9M |
|
872
PUT
NetApp
NTAP
$32.3B
| $8.59M | 0.01% |
93,400
+38,400
| +70% | +$3.46M |
|
873
Procter & Gamble
PG
$342B
| $8.58M | 0.01% |
52,428
-46,926
| -47% | -$6.97M |
|
874
American Airlines Group
AAL
$8.96B
| $8.56M | 0.01% |
476,820
-318,682
| -40% | -$6.11M |
|
|
BBBY
875
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $8.51M | 0.01% |
583,400
+36,600
| +7% | +$640K |
|
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.