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 | |
|---|---|---|---|---|---|---|
2776
CALL
Allegro MicroSystems
ALGM
$8.32B
| $1.06M | ﹤0.01% |
29,400
+29,000
| +7,250% | +$944K |
|
2777
Capri Holdings
CPRI
$1.83B
| $1.06M | ﹤0.01% |
16,387
-39,564
| -71% | -$2.34M |
|
|
SILV
2778
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $1.06M | ﹤0.01% |
134,500
+102,400
| +319% | +$831K |
|
|
ALTU
2779
CALL
DELISTED
Altitude Acquisition Corp
ALTU
| $1.06M | ﹤0.01% |
107,400
-301,500
| -74% | -$2.98M |
|
|
SGI
2780
PUT
Somnigroup International
SGI
$15.5B
| $1.06M | ﹤0.01% |
22,600
-37,600
| -62% | -$1.7M |
|
2781
PUT
SL Green Realty
SLG
$3.86B
| $1.06M | ﹤0.01% |
14,361
+5,117
| +55% | +$377K |
|
2782
CALL
Repligen
RGEN
$7.43B
| $1.06M | ﹤0.01% |
4,000
+1,900
| +90% | +$512K |
|
2783
Snap-on
SNA
$20.9B
| $1.06M | ﹤0.01% |
4,920
+3,842
| +356% | +$821K |
|
2784
CALL
Senseonics Holdings Inc
SENS
$262M
| $1.06M | ﹤0.01% |
19,815
-11,210
| -36% | -$728K |
|
|
JOYY
2785
CALL
JOYY Inc
JOYY
$3.8B
| $1.06M | ﹤0.01% |
23,300
-2,100
| -8% | -$108K |
|
2786
The RealReal
REAL
$1.37B
| $1.06M | ﹤0.01% |
91,044
+48,016
| +112% | +$631K |
|
2787
Peabody Energy
BTU
$2.76B
| $1.05M | ﹤0.01% |
104,656
+37,585
| +56% | +$456K |
|
|
LKFT
2788
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.84B
| $1.05M | ﹤0.01% |
19,100
-8,600
| -31% | -$449K |
|
|
ICPT
2789
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.05M | ﹤0.01% |
64,600
+37,100
| +135% | +$625K |
|
2790
CALL
CoStar Group
CSGP
$12.1B
| $1.05M | ﹤0.01% |
13,300
-60,900
| -82% | -$5.11M |
|
2791
CALL
SBA Communications
SBAC
$18.4B
| $1.05M | ﹤0.01% |
2,700
-8,900
| -77% | -$3.13M |
|
2792
CALL
e.l.f. Beauty
ELF
$4.75B
| $1.05M | ﹤0.01% |
31,600
-69,300
| -69% | -$2.15M |
|
2793
Iovance Biotherapeutics
IOVA
$2.2B
| $1.05M | ﹤0.01% |
+54,976
| New | +$1.21M |
|
2794
CALL
PureCycle Technologies
PCT
$1.18B
| $1.05M | ﹤0.01% |
109,500
+38,100
| +53% | +$459K |
|
2795
CALL
Ryder
R
$10.1B
| $1.05M | ﹤0.01% |
12,700
+3,500
| +38% | +$293K |
|
|
NVTA
2796
DELISTED
Invitae Corporation
NVTA
| $1.05M | ﹤0.01% |
68,512
+25,799
| +60% | +$558K |
|
2797
CALL
Atkore
ATKR
$2.54B
| $1.04M | ﹤0.01% |
9,400
+3,500
| +59% | +$356K |
|
2798
PUT
uniQure
QURE
$2.67B
| $1.04M | ﹤0.01% |
50,300
-500
| -1% | -$14.3K |
|
2799
PUT
Beazer Homes USA
BZH
$914M
| $1.04M | ﹤0.01% |
44,900
+28,600
| +175% | +$575K |
|
2800
Infosys
INFY
$46B
| $1.04M | ﹤0.01% |
+41,208
| New | +$958K |
|
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.