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 | |
|---|---|---|---|---|---|---|
2476
CALL
W.W. Grainger
GWW
$65.3B
| $1.35M | ﹤0.01% |
2,600
+2,300
| +767% | +$1.08M |
|
|
NSTG
2477
DELISTED
NanoString Technologies, Inc.
NSTG
| $1.34M | ﹤0.01% |
31,843
+30,884
| +3,220% | +$1.35M |
|
2478
PUT
Arbutus Biopharma
ABUS
$865M
| $1.34M | ﹤0.01% |
344,500
+178,600
| +108% | +$694K |
|
2479
PUT
Omega Healthcare
OHI
$15.4B
| $1.34M | ﹤0.01% |
45,300
+25,100
| +124% | +$733K |
|
2480
PUT
Vroom Inc
VRM
$36.9M
| $1.34M | ﹤0.01% |
1,553
+399
| +35% | +$537K |
|
|
CMPS
2481
PUT
Compass Pathways
CMPS
$1.52B
| $1.34M | ﹤0.01% |
60,600
+52,500
| +648% | +$1.67M |
|
2482
Groupon
GRPN
$980M
| $1.34M | ﹤0.01% |
57,763
+42,331
| +274% | +$988K |
|
2483
Vanguard Energy ETF
VDE
$10.1B
| $1.34M | ﹤0.01% |
17,238
+16,153
| +1,489% | +$1.28M |
|
|
SWAV
2484
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $1.34M | ﹤0.01% |
7,500
-7,300
| -49% | -$1.44M |
|
|
VG
2485
CALL
DELISTED
Vonage Holdings Corporation
VG
| $1.33M | ﹤0.01% |
64,200
-30,800
| -32% | -$561K |
|
2486
PUT
FS KKR Capital
FSK
$2.98B
| $1.33M | ﹤0.01% |
63,700
+28,014
| +79% | +$605K |
|
|
CGC
2487
PUT
Canopy Growth
CGC
$375M
| $1.33M | ﹤0.01% |
15,250
-310
| -2% | -$36.8K |
|
2488
PUT
DigitalBridge
DBRG
$2.94B
| $1.33M | ﹤0.01% |
39,975
-40,400
| -50% | -$1.2M |
|
2489
CALL
Genuine Parts
GPC
$17.1B
| $1.33M | ﹤0.01% |
9,500
-38,300
| -80% | -$5.07M |
|
|
IRBT
2490
CALL
DELISTED
iRobot
IRBT
| $1.33M | ﹤0.01% |
20,200
-1,600
| -7% | -$127K |
|
2491
Invesco Solar ETF
TAN
$1.47B
| $1.33M | ﹤0.01% |
17,270
-6,524
| -27% | -$572K |
|
2492
CALL
Offerpad Solutions
OPAD
$19M
| $1.33M | ﹤0.01% |
+1,384
| New | +$1.59M |
|
2493
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.33M | ﹤0.01% |
+26,318
| New | +$1.51M |
|
2494
iShares MSCI Germany ETF
EWG
$1.5B
| $1.33M | ﹤0.01% |
40,473
+14,484
| +56% | +$481K |
|
|
OTLY
2495
Oatly Group
OTLY
$417M
| $1.33M | ﹤0.01% |
8,331
+7,595
| +1,032% | +$1.68M |
|
2496
Vermilion Energy
VET
$1.73B
| $1.32M | ﹤0.01% |
105,096
+24,814
| +31% | +$270K |
|
2497
PUT
Fox Class B
FOX
$20.7B
| $1.32M | ﹤0.01% |
36,600
-7,600
| -17% | -$278K |
|
2498
PUT
Helmerich & Payne
HP
$3.53B
| $1.32M | ﹤0.01% |
55,700
-900
| -2% | -$25.6K |
|
2499
Magnite
MGNI
$2.65B
| $1.32M | ﹤0.01% |
+75,473
| New | +$1.7M |
|
2500
Clean Energy Fuels
CLNE
$447M
| $1.31M | ﹤0.01% |
214,619
-116,055
| -35% | -$910K |
|
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.