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 | |
|---|---|---|---|---|---|---|
976
CALL
Quest Diagnostics
DGX
$25.1B
| $7.25M | 0.01% |
41,900
+13,200
| +46% | +$2.01M |
|
977
PUT
Ross Stores
ROST
$74.5B
| $7.22M | 0.01% |
63,200
+44,000
| +229% | +$4.92M |
|
978
PUT
Welltower
WELL
$174B
| $7.2M | 0.01% |
84,000
+58,200
| +226% | +$4.85M |
|
|
SPWR
979
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $7.2M | 0.01% |
346,900
-2,700
| -0.8% | -$73K |
|
980
CALL
Oneok
OKE
$58.7B
| $7.19M | 0.01% |
122,300
+19,700
| +19% | +$1.22M |
|
981
PUT
Under Armour Class C
UA
$2.81B
| $7.16M | 0.01% |
367,800
-291,500
| -44% | -$5.66M |
|
982
CALL
Truist Financial
TFC
$62.5B
| $7.16M | 0.01% |
126,800
+137
| +0.1% | +$8.37K |
|
983
MongoDB
MDB
$24.1B
| $7.15M | 0.01% |
13,516
+6,242
| +86% | +$3.2M |
|
984
PUT
Moody's
MCO
$82.5B
| $7.15M | 0.01% |
18,300
+10,000
| +120% | +$3.86M |
|
985
MetLife
MET
$59.5B
| $7.14M | 0.01% |
114,319
+97,694
| +588% | +$6.13M |
|
986
State Street Utilities Select Sector SPDR ETF
XLU
$24B
| $7.14M | 0.01% |
199,494
-101,326
| -34% | -$3.42M |
|
987
Comcast
CMCSA
$78.3B
| $7.1M | 0.01% |
141,053
+35,115
| +33% | +$1.83M |
|
|
FLNA
988
PUT
Filana Therapeutics
FLNA
$45M
| $7.1M | 0.01% |
162,400
+39,100
| +32% | +$2.05M |
|
|
SAVE
989
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $7.09M | 0.01% |
324,700
+176,300
| +119% | +$4.1M |
|
990
CALL
Darden Restaurants
DRI
$22.2B
| $7.08M | 0.01% |
47,000
-149,800
| -76% | -$22.1M |
|
991
PUT
Asana
ASAN
$1.51B
| $7.07M | 0.01% |
94,900
-27,500
| -22% | -$2.91M |
|
|
JNPR
992
PUT
DELISTED
Juniper Networks
JNPR
| $7.06M | 0.01% |
197,600
+127,800
| +183% | +$4M |
|
993
CALL
Five Below
FIVE
$11.1B
| $7.05M | 0.01% |
34,100
+25,300
| +288% | +$4.98M |
|
994
CALL
Nutanix
NTNX
$14.2B
| $7.04M | 0.01% |
221,000
-9,300
| -4% | -$319K |
|
995
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.28B
| $7.04M | 0.01% |
534,700
+53,300
| +11% | +$689K |
|
996
KLA
KLAC
$286B
| $7.01M | 0.01% |
162,920
+57,410
| +54% | +$2.22M |
|
997
CALL
Lemonade
LMND
$4.66B
| $7M | 0.01% |
166,300
+19,600
| +13% | +$1.1M |
|
|
GRMN
998
CALL
Garmin
GRMN
$46.3B
| $7M | 0.01% |
51,400
+39,200
| +321% | +$5.66M |
|
|
DENT
999
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $6.98M | 0.01% |
273,400
+147,100
| +116% | +$3.76M |
|
1000
PUT
Canadian Imperial Bank of Commerce
CM
$106B
| $6.97M | 0.01% |
119,600
+87,200
| +269% | +$5.08M |
|
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.