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 | |
|---|---|---|---|---|---|---|
|
CNR
4276
CALL
DELISTED
Cornerstone Building Brands, Inc.
CNR
| $362K | ﹤0.01% |
20,800
+100
| +0.5% | +$1.55K |
|
4277
CALL
Autoliv
ALV
$9.14B
| $361K | ﹤0.01% |
3,500
+1,900
| +119% | +$186K |
|
4278
CALL
Apple Hospitality REIT
APLE
$3.97B
| $361K | ﹤0.01% |
22,400
-800
| -3% | -$12.7K |
|
4279
PUT
Blackstone Mortgage Trust
BXMT
$2.77B
| $361K | ﹤0.01% |
11,800
+400
| +4% | +$12.7K |
|
4280
Cardiff Oncology
CRDF
$63M
| $361K | ﹤0.01% |
60,136
+55,676
| +1,248% | +$332K |
|
4281
CALL
Valley National Bancorp
VLY
$7.9B
| $361K | ﹤0.01% |
26,300
-17,000
| -39% | -$236K |
|
|
PRVB
4282
CALL
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $361K | ﹤0.01% |
64,400
-21,100
| -25% | -$134K |
|
4283
CALL
Ardagh Metal Packaging
AMBP
$2.96B
| $360K | ﹤0.01% |
+39,900
| New | +$380K |
|
4284
CALL
Lifestance Health
LFST
$4.15B
| $360K | ﹤0.01% |
+37,900
| New | +$402K |
|
|
MAG
4285
DELISTED
MAG Silver
MAG
| $360K | ﹤0.01% |
23,025
-13,876
| -38% | -$243K |
|
4286
PUT
Nu Skin
NUS
$257M
| $360K | ﹤0.01% |
7,100
+2,600
| +58% | +$116K |
|
4287
PUT
Oshkosh
OSK
$8.91B
| $360K | ﹤0.01% |
3,200
-4,700
| -59% | -$514K |
|
|
NKLA
4288
DELISTED
Nikola Corporation Common Stock
NKLA
| $360K | ﹤0.01% |
1,218
-2,897
| -70% | -$966K |
|
|
GPP
4289
PUT
DELISTED
Green Plains Partners LP
GPP
| $360K | ﹤0.01% |
25,400
+14,300
| +129% | +$206K |
|
4290
Host Hotels & Resorts
HST
$17.5B
| $359K | ﹤0.01% |
+20,663
| New | +$349K |
|
4291
CALL
iHeartMedia
IHRT
$531M
| $359K | ﹤0.01% |
17,100
-19,600
| -53% | -$415K |
|
4292
CALL
Integer Holdings
ITGR
$3.39B
| $359K | ﹤0.01% |
4,200
+4,000
| +2,000% | +$349K |
|
4293
PUT
News Corp Class B
NWS
$17.7B
| $359K | ﹤0.01% |
16,100
+15,500
| +2,583% | +$355K |
|
4294
PUT
Sunoco
SUN
$14.4B
| $359K | ﹤0.01% |
8,800
+3,200
| +57% | +$127K |
|
|
VWE
4295
CALL
DELISTED
Vintage Wine Estates, Inc. Common Stock
VWE
| $359K | ﹤0.01% |
30,400
-47,400
| -61% | -$500K |
|
4296
PUT
BGC Group
BGC
$5.64B
| $358K | ﹤0.01% |
77,100
-96,800
| -56% | -$483K |
|
4297
Yelp
YELP
$1.54B
| $358K | ﹤0.01% |
9,885
-2,701
| -21% | -$101K |
|
|
MUDS
4298
CALL
DELISTED
Mudrick Capital Acquisition Corporation II Class A Common Stock
MUDS
| $358K | ﹤0.01% |
36,100
-194,500
| -84% | -$1.94M |
|
4299
CALL
Harmony Gold Mining
HMY
$9.7B
| $357K | ﹤0.01% |
87,000
-7,500
| -8% | -$28.7K |
|
4300
CALL
Blue Owl Capital
OWL
$6.45B
| $357K | ﹤0.01% |
24,000
-108,800
| -82% | -$1.72M |
|
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.