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 | |
|---|---|---|---|---|---|---|
5176
CALL
Lightwave Logic
LWLG
$995M
| $202K | ﹤0.01% |
+13,600
| New | +$179K |
|
|
NOAH
5177
CALL
Noah Holdings
NOAH
$580M
| $202K | ﹤0.01% |
6,600
+3,600
| +120% | +$136K |
|
5178
NETSCOUT
NTCT
$2.96B
| $202K | ﹤0.01% |
6,117
+4,849
| +382% | +$147K |
|
5179
CALL
RCI Hospitality Holdings
RICK
$192M
| $202K | ﹤0.01% |
2,600
-200
| -7% | -$13.9K |
|
5180
CALL
SandRidge Energy
SD
$514M
| $202K | ﹤0.01% |
19,400
-20,300
| -51% | -$241K |
|
5181
Silicon Motion
SIMO
$8.6B
| $202K | ﹤0.01% |
2,129
-11,235
| -84% | -$847K |
|
5182
Silgan Holdings
SLGN
$4.23B
| $202K | ﹤0.01% |
+4,720
| New | +$195K |
|
5183
Invesco S&P 500 Top 50 ETF
XLG
$10.6B
| $202K | ﹤0.01% |
+5,480
| New | +$195K |
|
|
NSTB
5184
CALL
DELISTED
Northern Star Investment Corp. II
NSTB
| $202K | ﹤0.01% |
20,900
-52,800
| -72% | -$520K |
|
5185
Anavex Life Sciences
AVXL
$255M
| $201K | ﹤0.01% |
11,608
-11,244
| -49% | -$214K |
|
|
BHR
5186
CALL
Braemar Hotels & Resorts
BHR
$156M
| $201K | ﹤0.01% |
39,600
+17,700
| +81% | +$86.9K |
|
5187
CALL
BlueLinx
BXC
$422M
| $201K | ﹤0.01% |
2,100
-3,700
| -64% | -$251K |
|
5188
The GEO Group
GEO
$4.13B
| $201K | ﹤0.01% |
26,058
+20,318
| +354% | +$166K |
|
5189
CALL
NewtekOne
NEWT
$428M
| $201K | ﹤0.01% |
7,300
+3,500
| +92% | +$103K |
|
|
P
5190
Everpure Inc
P
$25.7B
| $201K | ﹤0.01% |
6,186
-15,521
| -72% | -$450K |
|
5191
CALL
Pixelworks
PXLW
$38.2M
| $201K | ﹤0.01% |
3,808
+3,541
| +1,326% | +$200K |
|
|
FATH
5192
CALL
DELISTED
Fathom Digital Manufacturing Corporation
FATH
| $201K | ﹤0.01% |
+1,270
| New | +$247K |
|
|
TRIT
5193
PUT
DELISTED
Triterras, Inc. Class A Ordinary Shares
TRIT
| $201K | ﹤0.01% |
50,800
-39,400
| -44% | -$196K |
|
|
BRSP
5194
CALL
BrightSpire Capital
BRSP
$634M
| $200K | ﹤0.01% |
19,500
+17,700
| +983% | +$172K |
|
5195
Encompass Health
EHC
$11B
| $200K | ﹤0.01% |
3,859
+2,182
| +130% | +$113K |
|
5196
PUT
Galicia Financial Group
GGAL
$7.99B
| $200K | ﹤0.01% |
21,100
-66,900
| -76% | -$688K |
|
5197
Horizon Kinetics Inflation Beneficiaries ETF
INFL
$1.51B
| $200K | ﹤0.01% |
6,436
-35,577
| -85% | -$1.1M |
|
5198
CALL
InnovAge Holding
INNV
$1.54B
| $200K | ﹤0.01% |
+40,100
| New | +$291K |
|
|
CMRX
5199
CALL
DELISTED
Chimerix, Inc.
CMRX
| $200K | ﹤0.01% |
31,200
+28,200
| +940% | +$169K |
|
|
VWTR
5200
DELISTED
Vidler Water Resouces, Inc. Common Stock
VWTR
| $200K | ﹤0.01% |
16,619
-67,511
| -80% | -$814K |
|
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.