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 | |
|---|---|---|---|---|---|---|
5276
PUT
El Pollo Loco
LOCO
$501M
| $190K | ﹤0.01% |
13,400
+11,800
| +738% | +$173K |
|
5277
RPC Inc
RES
$1.24B
| $190K | ﹤0.01% |
41,957
+30,081
| +253% | +$148K |
|
|
SOHU
5278
PUT
Sohu.com
SOHU
$362M
| $190K | ﹤0.01% |
11,700
-10,000
| -46% | -$189K |
|
5279
Build-A-Bear
BBW
$425M
| $189K | ﹤0.01% |
+9,694
| New | +$171K |
|
5280
Dogness International Corp
DOGZ
$12.8M
| $189K | ﹤0.01% |
+1,126
| New | +$105K |
|
5281
CALL
Garrett Motion
GTX
$5.81B
| $189K | ﹤0.01% |
23,600
+16,900
| +252% | +$125K |
|
|
VXRT
5282
DELISTED
Vaxart
VXRT
| $189K | ﹤0.01% |
30,161
-22,117
| -42% | -$151K |
|
|
RVNC
5283
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $189K | ﹤0.01% |
11,600
+10,800
| +1,350% | +$180K |
|
|
KLR
5284
DELISTED
Kaleyra, Inc.
KLR
| $189K | ﹤0.01% |
+5,405
| New | +$206K |
|
|
RUTH
5285
PUT
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $189K | ﹤0.01% |
9,500
-1,700
| -15% | -$32.6K |
|
5286
PUT
Cal-Maine
CALM
$4.12B
| $188K | ﹤0.01% |
5,100
-21,700
| -81% | -$786K |
|
5287
PUT
Ichor Holdings
ICHR
$2.62B
| $188K | ﹤0.01% |
4,100
-500
| -11% | -$22.1K |
|
5288
PUT
MaxLinear
MXL
$6.06B
| $188K | ﹤0.01% |
2,500
+600
| +32% | +$38.4K |
|
|
VPU
5289
Vanguard Utilities ETF
VPU
$8.46B
| $188K | ﹤0.01% |
+1,206
| New | +$178K |
|
|
EGRX
5290
CALL
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $188K | ﹤0.01% |
+3,700
| New | +$192K |
|
|
AGEN
5291
PUT
Agenus
AGEN
$312M
| $187K | ﹤0.01% |
2,960
+1,926
| +186% | +$152K |
|
5292
CALL
Beam Global
BEEM
$23.3M
| $187K | ﹤0.01% |
10,100
-2,800
| -22% | -$76.4K |
|
5293
CALL
Dycom Industries
DY
$12B
| $187K | ﹤0.01% |
2,000
-600
| -23% | -$50.7K |
|
5294
Fulgent Genetics
FLGT
$470M
| $187K | ﹤0.01% |
1,865
+290
| +18% | +$25.5K |
|
5295
CALL
Flux Power
FLUX
$11.2M
| $187K | ﹤0.01% |
43,700
+8,900
| +26% | +$47.3K |
|
5296
GeoPark
GPRK
$633M
| $187K | ﹤0.01% |
+16,370
| New | +$216K |
|
|
MESO
5297
PUT
Mesoblast
MESO
$1.84B
| $187K | ﹤0.01% |
19,500
-15,300
| -44% | -$178K |
|
5298
CALL
Phreesia
PHR
$663M
| $187K | ﹤0.01% |
4,500
+3,600
| +400% | +$214K |
|
5299
Valaris
VAL
$5.48B
| $187K | ﹤0.01% |
5,201
-24,373
| -82% | -$849K |
|
|
MFGP
5300
CALL
DELISTED
Micro Focus International plc. American Depositary Shares, each representing One Ordinary Share
MFGP
| $187K | ﹤0.01% |
33,700
-7,500
| -18% | -$38.2K |
|
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.