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 | |
|---|---|---|---|---|---|---|
1426
Rocket Lab Corp
RKLB
$39.9B
| $3.83M | ﹤0.01% |
+311,606
| New | +$4.28M |
|
1427
PUT
American Eagle Outfitters
AEO
$2.85B
| $3.83M | ﹤0.01% |
151,100
-22,100
| -13% | -$563K |
|
1428
CALL
Guardant Health
GH
$19.5B
| $3.82M | ﹤0.01% |
38,200
+26,700
| +232% | +$2.76M |
|
|
TRQ
1429
CALL
DELISTED
Turquoise Hill Resources Ltd
TRQ
| $3.81M | ﹤0.01% |
231,700
+217,700
| +1,555% | +$3.07M |
|
1430
CALL
DaVita
DVA
$15.1B
| $3.8M | ﹤0.01% |
33,400
+19,300
| +137% | +$2.07M |
|
1431
CALL
Dave & Buster's
PLAY
$343M
| $3.8M | ﹤0.01% |
98,900
-120,700
| -55% | -$4.48M |
|
1432
PUT
L3Harris
LHX
$55.9B
| $3.79M | ﹤0.01% |
17,800
-700
| -4% | -$155K |
|
1433
Snowflake
SNOW
$92.9B
| $3.79M | ﹤0.01% |
11,198
+10,276
| +1,115% | +$3.58M |
|
1434
PUT
Bath & Body Works
BBWI
$4.01B
| $3.79M | ﹤0.01% |
+84,600
| New | +$6.01M |
|
|
KEEL
1435
CALL
Keel Infrastructure Corp
KEEL
$2.57B
| $3.79M | ﹤0.01% |
+749,700
| New | +$4.63M |
|
|
MITT
1436
PUT
TPG Mortgage Investment Trust
MITT
$230M
| $3.78M | ﹤0.01% |
369,100
+86,100
| +30% | +$976K |
|
1437
CALL
JetBlue
JBLU
$1.96B
| $3.78M | ﹤0.01% |
265,500
-35,100
| -12% | -$516K |
|
1438
XPeng
XPEV
$11.8B
| $3.78M | ﹤0.01% |
75,118
-200,568
| -73% | -$9.04M |
|
1439
PUT
Encompass Health
EHC
$11.2B
| $3.78M | ﹤0.01% |
72,780
+64,107
| +739% | +$3.31M |
|
1440
CALL
Becton Dickinson
BDX
$43.1B
| $3.77M | ﹤0.01% |
15,375
-11,275
| -42% | -$2.7M |
|
1441
CALL
Amphenol
APH
$188B
| $3.77M | ﹤0.01% |
86,200
-79,400
| -48% | -$3.21M |
|
|
CGC
1442
CALL
Canopy Growth
CGC
$375M
| $3.76M | ﹤0.01% |
43,040
+19,140
| +80% | +$2.27M |
|
1443
CALL
VeriSign
VRSN
$25.3B
| $3.76M | ﹤0.01% |
14,800
+2,100
| +17% | +$486K |
|
1444
CALL
Equifax
EFX
$20.3B
| $3.75M | ﹤0.01% |
12,800
+4,400
| +52% | +$1.22M |
|
1445
Tesla
TSLA
$1.24T
| $3.74M | ﹤0.01% |
+10,623
| New | +$3.56M |
|
1446
Take-Two Interactive
TTWO
$43B
| $3.74M | ﹤0.01% |
21,042
-20,436
| -49% | -$3.56M |
|
1447
CALL
ACI Worldwide
ACIW
$5.72B
| $3.74M | ﹤0.01% |
107,700
+30,100
| +39% | +$966K |
|
1448
CALL
Pool Corp
POOL
$6.7B
| $3.73M | ﹤0.01% |
6,600
+4,200
| +175% | +$2.2M |
|
1449
CALL
Essex Property Trust
ESS
$18.9B
| $3.73M | ﹤0.01% |
+10,600
| New | +$3.61M |
|
1450
CALL
Hershey
HSY
$35.4B
| $3.73M | ﹤0.01% |
19,300
-39,400
| -67% | -$7.13M |
|
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.