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 | |
|---|---|---|---|---|---|---|
2276
iShares MSCI South Korea ETF
EWY
$21.7B
| $1.61M | ﹤0.01% |
20,660
+9,726
| +89% | +$769K |
|
2277
CALL
Sibanye-Stillwater
SBSW
$5.92B
| $1.61M | ﹤0.01% |
128,100
+20,400
| +19% | +$274K |
|
|
SAFM
2278
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $1.6M | ﹤0.01% |
8,400
+7,400
| +740% | +$1.39M |
|
2279
PUT
GFL Environmental
GFL
$14.3B
| $1.6M | ﹤0.01% |
42,400
-155,800
| -79% | -$6.06M |
|
|
BERY
2280
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $1.6M | ﹤0.01% |
23,631
+17,206
| +268% | +$1.07M |
|
2281
PUT
Nexstar Media Group
NXST
$5.6B
| $1.6M | ﹤0.01% |
10,600
-35,000
| -77% | -$5.43M |
|
2282
CALL
Post Holdings
POST
$4.12B
| $1.6M | ﹤0.01% |
21,698
+17,572
| +426% | +$1.21M |
|
2283
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $1.6M | ﹤0.01% |
62,300
+11,200
| +22% | +$409K |
|
2284
Rockwell Automation
ROK
$51.4B
| $1.6M | ﹤0.01% |
+4,576
| New | +$1.52M |
|
2285
CALL
Whirlpool
WHR
$2.42B
| $1.59M | ﹤0.01% |
6,800
-8,800
| -56% | -$1.93M |
|
2286
PUT
Range Resources
RRC
$9.11B
| $1.59M | ﹤0.01% |
89,400
+9,200
| +11% | +$198K |
|
2287
CALL
Enovix
ENVX
$862M
| $1.59M | ﹤0.01% |
+66,743
| New | +$1.62M |
|
2288
CALL
Mitek Systems
MITK
$762M
| $1.59M | ﹤0.01% |
89,800
+48,800
| +119% | +$872K |
|
2289
CALL
Revolve Group
RVLV
$1.79B
| $1.59M | ﹤0.01% |
28,400
-15,100
| -35% | -$1.06M |
|
2290
CALL
Louisiana-Pacific
LPX
$5.2B
| $1.59M | ﹤0.01% |
20,300
-45,700
| -69% | -$3.13M |
|
|
CEQP
2291
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $1.59M | ﹤0.01% |
57,600
-6,000
| -9% | -$167K |
|
2292
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $1.59M | ﹤0.01% |
20,500
-1,600
| -7% | -$124K |
|
|
NNDM
2293
Nano Dimension
NNDM
$309M
| $1.59M | ﹤0.01% |
418,090
+70,967
| +20% | +$360K |
|
2294
PUT
Zimmer Biomet
ZBH
$17.7B
| $1.59M | ﹤0.01% |
12,875
-2,163
| -14% | -$283K |
|
2295
W.P. Carey
WPC
$17.1B
| $1.59M | ﹤0.01% |
19,748
+13,732
| +228% | +$1.05M |
|
2296
Sysco
SYY
$39.7B
| $1.59M | ﹤0.01% |
20,198
-25,279
| -56% | -$1.95M |
|
2297
PUT
Atea Pharmaceuticals
AVIR
$379M
| $1.58M | ﹤0.01% |
177,200
+174,600
| +6,715% | +$2.72M |
|
2298
Becton Dickinson
BDX
$43.1B
| $1.58M | ﹤0.01% |
6,460
+6,202
| +2,404% | +$1.49M |
|
2299
DoorDash
DASH
$75.3B
| $1.58M | ﹤0.01% |
10,642
-9,053
| -46% | -$1.71M |
|
|
TIGR
2300
CALL
UP Fintech Holding
TIGR
$845M
| $1.58M | ﹤0.01% |
322,600
+245,200
| +317% | +$1.72M |
|
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.