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 | |
|---|---|---|---|---|---|---|
4126
Vanguard Health Care ETF
VHT
$18.6B
| $400K | ﹤0.01% |
+1,502
| New | +$383K |
|
|
CONE
4127
DELISTED
CyrusOne Inc Common Stock
CONE
| $400K | ﹤0.01% |
4,460
+1,572
| +54% | +$133K |
|
4128
CALL
Kimbell Royalty Partners
KRP
$1.45B
| $399K | ﹤0.01% |
29,300
+14,300
| +95% | +$205K |
|
|
GPP
4129
CALL
DELISTED
Green Plains Partners LP
GPP
| $399K | ﹤0.01% |
28,100
+12,100
| +76% | +$174K |
|
4130
PUT
Ecolab
ECL
$79.3B
| $398K | ﹤0.01% |
1,700
-500
| -23% | -$113K |
|
4131
PUT
Rackspace Technology
RXT
$1B
| $398K | ﹤0.01% |
29,600
+18,400
| +164% | +$263K |
|
|
SRG
4132
Seritage Growth Properties
SRG
$139M
| $398K | ﹤0.01% |
30,035
-11,032
| -27% | -$162K |
|
|
TMHC
4133
PUT
DELISTED
Taylor Morrison
TMHC
| $398K | ﹤0.01% |
11,400
-32,700
| -74% | -$1.02M |
|
4134
Tradeweb Markets
TW
$23.1B
| $398K | ﹤0.01% |
+3,981
| New | +$367K |
|
4135
PUT
Ubiquiti
UI
$32.4B
| $398K | ﹤0.01% |
1,300
-9,700
| -88% | -$2.95M |
|
|
PING
4136
DELISTED
Ping Identity Holding Corp.
PING
| $398K | ﹤0.01% |
17,403
-20,951
| -55% | -$533K |
|
4137
PUT
SelectQuote
SLQT
$126M
| $397K | ﹤0.01% |
43,900
+24,800
| +130% | +$272K |
|
4138
PUT
Voya Financial
VOYA
$9.03B
| $397K | ﹤0.01% |
6,000
+5,900
| +5,900% | +$389K |
|
4139
CALL
Actinium Pharmaceuticals
ATNM
$26.2M
| $396K | ﹤0.01% |
65,900
-48,000
| -42% | -$360K |
|
4140
PUT
BlackSky Technology
BKSY
$884M
| $395K | ﹤0.01% |
+11,000
| New | +$751K |
|
4141
CALL
Jefferies Financial Group
JEF
$12.8B
| $395K | ﹤0.01% |
10,669
-79,182
| -88% | -$3.05M |
|
|
CYXT
4142
CALL
DELISTED
Cyxtera Technologies, Inc. Class A Common Stock
CYXT
| $395K | ﹤0.01% |
+31,400
| New | +$320K |
|
|
ONEM
4143
CALL
DELISTED
1Life Healthcare
ONEM
| $395K | ﹤0.01% |
22,500
-21,800
| -49% | -$423K |
|
4144
PUT
Seer Inc
SEER
$115M
| $394K | ﹤0.01% |
17,300
+16,500
| +2,063% | +$476K |
|
|
SGMO
4145
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $394K | ﹤0.01% |
52,552
+29,258
| +126% | +$254K |
|
4146
CALL
Sportsman's Warehouse
SPWH
$45.7M
| $394K | ﹤0.01% |
33,400
+17,500
| +110% | +$275K |
|
|
PLAN
4147
PUT
DELISTED
Anaplan, Inc.
PLAN
| $394K | ﹤0.01% |
8,600
-12,700
| -60% | -$700K |
|
4148
PUT
Aspen Aerogels
ASPN
$349M
| $393K | ﹤0.01% |
7,900
-2,500
| -24% | -$132K |
|
4149
CALL
Warrior Met Coal
HCC
$4.22B
| $393K | ﹤0.01% |
15,300
+13,700
| +856% | +$329K |
|
|
KC
4150
PUT
Kingsoft Cloud Holdings
KC
$3.06B
| $393K | ﹤0.01% |
25,000
-37,700
| -60% | -$810K |
|
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.