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 | Miscellaneous | 97.43% |
| 2 | Technology | 0.63% |
| 3 | Consumer Discretionary | 0.43% |
| 4 | Healthcare | 0.36% |
| 5 | Communication Services | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1401
CALL
Churchill Downs
CHDN
$6.07B
| $3.93M | ﹤0.01% |
32,600
+29,800
| +1,064% | +$3.54M |
|
1402
PUT
Innovative Industrial Properties
IIPR
$1.58B
| $3.92M | ﹤0.01% |
14,900
+8,600
| +137% | +$2.21M |
|
1403
CALL
Southern Company
SO
$101B
| $3.92M | ﹤0.01% |
57,100
-70,800
| -55% | -$4.51M |
|
1404
CALL
Williams Companies
WMB
$90.7B
| $3.91M | ﹤0.01% |
150,100
+70,700
| +89% | +$1.95M |
|
1405
CALL
Rockwell Automation
ROK
$48.2B
| $3.91M | ﹤0.01% |
11,200
+300
| +3% | +$99.3K |
|
|
WIRE
1406
DELISTED
Encore Wire Corp
WIRE
| $3.91M | ﹤0.01% |
+27,309
| New | +$3.53M |
|
1407
CALL
Dynatrace
DT
$15B
| $3.9M | ﹤0.01% |
64,700
+16,700
| +35% | +$1.14M |
|
|
LAZR
1408
PUT
DELISTED
Luminar Technologies
LAZR
| $3.9M | ﹤0.01% |
15,393
-867
| -5% | -$217K |
|
1409
Tenet Healthcare
THC
$21.3B
| $3.9M | ﹤0.01% |
47,737
+17,912
| +60% | +$1.31M |
|
1410
CALL
Alkermes
ALKS
$7.73B
| $3.89M | ﹤0.01% |
167,300
+156,500
| +1,449% | +$4.11M |
|
1411
PUT
Eaton
ETN
$160B
| $3.89M | ﹤0.01% |
22,500
+5,000
| +29% | +$829K |
|
|
BBIG
1412
CALL
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $3.89M | ﹤0.01% |
125,413
+112,514
| +872% | +$6.58M |
|
1413
PUT
Academy Sports + Outdoors
ASO
$2.79B
| $3.88M | ﹤0.01% |
88,500
+25,300
| +40% | +$1.1M |
|
|
AAWW
1414
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $3.88M | ﹤0.01% |
41,259
+32,134
| +352% | +$2.77M |
|
1415
Digital Turbine
APPS
$1.3B
| $3.87M | ﹤0.01% |
63,442
+36,939
| +139% | +$2.51M |
|
|
EXE
1416
CALL
Expand Energy Corp
EXE
$22.7B
| $3.86M | ﹤0.01% |
59,900
+38,200
| +176% | +$2.42M |
|
1417
PUT
Chegg
CHGG
$94.5M
| $3.85M | ﹤0.01% |
125,600
+63,100
| +101% | +$2.56M |
|
1418
ExxonMobil
XOM
$656B
| $3.85M | ﹤0.01% |
62,990
-14,908
| -19% | -$932K |
|
1419
Jones Lang LaSalle
JLL
$16.7B
| $3.85M | ﹤0.01% |
14,308
+12,642
| +759% | +$3.26M |
|
1420
Marvell Technology
MRVL
$201B
| $3.85M | ﹤0.01% |
44,041
+40,436
| +1,122% | +$3.02M |
|
1421
CALL
Knight Transportation
KNX
$11.7B
| $3.85M | ﹤0.01% |
63,100
+19,700
| +45% | +$1.12M |
|
1422
PUT
Ralph Lauren
RL
$20.9B
| $3.84M | ﹤0.01% |
32,300
-18,100
| -36% | -$2.17M |
|
1423
PUT
Keurig Dr Pepper
KDP
$44.3B
| $3.84M | ﹤0.01% |
104,100
+69,500
| +201% | +$2.45M |
|
1424
CALL
Tower Semiconductor
TSEM
$25.1B
| $3.84M | ﹤0.01% |
96,700
-900
| -0.9% | -$31.3K |
|
1425
PUT
Corning
GLW
$133B
| $3.83M | ﹤0.01% |
102,800
+38,300
| +59% | +$1.43M |
|
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's Q4 2021 filing shows 2,268 new, 3,786 increased, 4,257 reduced and 1,643 closed positions. Its largest new stake was iShares China Large-Cap ETF: 902,666 shares worth $33M. The largest sale was AMC Entertainment Holdings, an estimated $49.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 2,268 new positions and closed 1,643 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.