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 | |
|---|---|---|---|---|---|---|
3626
BlackBerry
BB
$4.74B
| $567K | ﹤0.01% |
60,728
-569,819
| -90% | -$5.7M |
|
3627
PUT
dLocal
DLO
$4.38B
| $567K | ﹤0.01% |
15,900
+14,600
| +1,123% | +$631K |
|
|
GAN
3628
CALL
DELISTED
GAN Ltd
GAN
| $567K | ﹤0.01% |
61,800
+45,800
| +286% | +$560K |
|
3629
PUT
Hyliion Holdings
HYLN
$631M
| $567K | ﹤0.01% |
91,600
-32,600
| -26% | -$233K |
|
3630
CALL
Sunoco
SUN
$14.4B
| $567K | ﹤0.01% |
13,900
+2,300
| +20% | +$91.2K |
|
3631
PUT
Teledyne Technologies
TDY
$30.1B
| $567K | ﹤0.01% |
1,300
+300
| +30% | +$130K |
|
3632
PUT
Century Aluminum
CENX
$4.35B
| $566K | ﹤0.01% |
34,200
-12,700
| -27% | -$186K |
|
3633
PUT
Suburban Propane Partners
SPH
$1.24B
| $566K | ﹤0.01% |
38,700
+13,700
| +55% | +$207K |
|
3634
CALL
Dorman Products
DORM
$4.28B
| $565K | ﹤0.01% |
5,000
+2,100
| +72% | +$228K |
|
3635
PUT
Nano X Imaging
NNOX
$61.1M
| $565K | ﹤0.01% |
38,900
-25,700
| -40% | -$533K |
|
|
ASTR
3636
PUT
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $565K | ﹤0.01% |
5,440
+5,133
| +1,672% | +$705K |
|
3637
Xerox
XRX
$360M
| $563K | ﹤0.01% |
24,904
+2,371
| +11% | +$48.2K |
|
|
LEAP
3638
PUT
DELISTED
Ribbit LEAP, Ltd.
LEAP
| $563K | ﹤0.01% |
56,300
+53,800
| +2,152% | +$550K |
|
|
SLI
3639
CALL
Standard Lithium
SLI
$493M
| $562K | ﹤0.01% |
+57,300
| New | +$561K |
|
3640
CALL
WD-40
WDFC
$3.08B
| $562K | ﹤0.01% |
2,300
+2,000
| +667% | +$466K |
|
3641
Lemonade
LMND
$4.77B
| $560K | ﹤0.01% |
13,314
-14,725
| -53% | -$828K |
|
|
SNV
3642
CALL
DELISTED
Synovus
SNV
| $560K | ﹤0.01% |
11,700
-5,300
| -31% | -$251K |
|
3643
PUT
Veracyte
VCYT
$4.44B
| $560K | ﹤0.01% |
13,600
+12,200
| +871% | +$539K |
|
3644
CALL
Immunovant
IMVT
$7.99B
| $558K | ﹤0.01% |
65,500
-359,700
| -85% | -$2.97M |
|
3645
CALL
Nexstar Media Group
NXST
$5.92B
| $558K | ﹤0.01% |
3,700
+1,700
| +85% | +$264K |
|
|
IS
3646
DELISTED
ironSource Ltd.
IS
| $558K | ﹤0.01% |
72,136
-55,955
| -44% | -$551K |
|
3647
CALL
Atomera
ATOM
$187M
| $557K | ﹤0.01% |
27,700
-63,500
| -70% | -$1.49M |
|
3648
CALL
Upbound Group
UPBD
$1.26B
| $557K | ﹤0.01% |
11,600
-4,300
| -27% | -$215K |
|
|
NS
3649
CALL
DELISTED
NuStar Energy L.P.
NS
| $557K | ﹤0.01% |
35,100
+12,800
| +57% | +$199K |
|
3650
CALL
Omeros
OMER
$816M
| $556K | ﹤0.01% |
86,600
-55,800
| -39% | -$405K |
|
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.