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 | |
|---|---|---|---|---|---|---|
|
OPI
4976
CALL
DELISTED
Office Properties Income Trust
OPI
| $231K | ﹤0.01% |
9,300
+4,500
| +94% | +$116K |
|
4977
PUT
Packaging Corp of America
PKG
$21.9B
| $231K | ﹤0.01% |
1,700
-14,800
| -90% | -$1.99M |
|
4978
PUT
Smith Micro Software
SMSI
$14.5M
| $231K | ﹤0.01% |
1,175
+892
| +315% | +$195K |
|
4979
PUT
Yeti Holdings
YETI
$3.71B
| $231K | ﹤0.01% |
2,800
-26,600
| -90% | -$2.44M |
|
|
GCP
4980
CALL
DELISTED
GCP Applied Technologies Inc.
GCP
| $231K | ﹤0.01% |
7,300
+2,100
| +40% | +$53.6K |
|
4981
CALL
Kontoor Brands
KTB
$4.63B
| $230K | ﹤0.01% |
4,500
-8,500
| -65% | -$456K |
|
4982
PUT
Outset Medical
OM
$84.7M
| $230K | ﹤0.01% |
+333
| New | +$246K |
|
|
TUP
4983
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $230K | ﹤0.01% |
15,100
-54,900
| -78% | -$1.02M |
|
|
CONN
4984
CALL
DELISTED
Conn's Inc.
CONN
| $230K | ﹤0.01% |
9,800
-3,500
| -26% | -$78.9K |
|
4985
CALL
Algonquin Power & Utilities
AQN
$4.49B
| $229K | ﹤0.01% |
15,900
+200
| +1% | +$2.86K |
|
4986
PUT
Brink's
BCO
$4.88B
| $229K | ﹤0.01% |
3,500
+2,800
| +400% | +$180K |
|
4987
Nabors Industries
NBR
$1.27B
| $229K | ﹤0.01% |
+2,829
| New | +$279K |
|
|
VLTA
4988
CALL
DELISTED
Volta Inc.
VLTA
| $229K | ﹤0.01% |
+31,200
| New | +$274K |
|
4989
Kanzhun
BZ
$7.27B
| $228K | ﹤0.01% |
+6,552
| New | +$230K |
|
4990
PUT
DNOW Inc
DNOW
$2.58B
| $228K | ﹤0.01% |
26,800
-116,800
| -81% | -$1.01M |
|
4991
PUT
Gaming and Leisure Properties
GLPI
$12.7B
| $228K | ﹤0.01% |
4,700
-5,000
| -52% | -$238K |
|
4992
PUT
Inseego
INSG
$114M
| $228K | ﹤0.01% |
3,920
-21,170
| -84% | -$1.38M |
|
4993
PUT
LegalZoom.com
LZ
$1.35B
| $228K | ﹤0.01% |
+14,200
| New | +$301K |
|
4994
PUT
Madrigal Pharmaceuticals
MDGL
$10.8B
| $228K | ﹤0.01% |
2,700
+2,500
| +1,250% | +$205K |
|
4995
Skywest
SKYW
$4.24B
| $228K | ﹤0.01% |
5,812
+2,858
| +97% | +$128K |
|
4996
CALL
Spire
SR
$4.72B
| $228K | ﹤0.01% |
3,500
+3,100
| +775% | +$196K |
|
4997
ZipRecruiter
ZIP
$321M
| $228K | ﹤0.01% |
9,177
+4,752
| +107% | +$130K |
|
|
MBT
4998
CALL
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $228K | ﹤0.01% |
28,800
-84,100
| -74% | -$733K |
|
4999
CALL
Alector
ALEC
$168M
| $227K | ﹤0.01% |
11,000
+3,700
| +51% | +$83.4K |
|
|
BBT
5000
CALL
Beacon Financial Corp
BBT
$2.66B
| $227K | ﹤0.01% |
8,000
+6,200
| +344% | +$172K |
|
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.