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 | |
|---|---|---|---|---|---|---|
5701
CALL
Ring Energy
REI
$320M
| $140K | ﹤0.01% |
61,500
-26,000
| -30% | -$80.5K |
|
5702
PUT
Revvity
RVTY
$12.9B
| $140K | ﹤0.01% |
700
-25,400
| -97% | -$4.59M |
|
|
SHOE
5703
PUT
Shoe Station Group
SHOE
$419M
| $140K | ﹤0.01% |
3,600
+3,500
| +3,500% | +$132K |
|
5704
PUT
Zedge
ZDGE
$38.9M
| $140K | ﹤0.01% |
16,500
+5,400
| +49% | +$59.2K |
|
|
SEI
5705
CALL
Solaris Energy Infrastructure
SEI
$3.4B
| $140K | ﹤0.01% |
21,500
+16,800
| +357% | +$125K |
|
|
CTLT
5706
PUT
DELISTED
CATALENT, INC.
CTLT
| $140K | ﹤0.01% |
1,100
-11,400
| -91% | -$1.46M |
|
|
TCS
5707
DELISTED
THE CONTAINER STORE GROUP, INC.
TCS
| $140K | ﹤0.01% |
939
-1,245
| -57% | -$210K |
|
5708
PUT
Brookfield Infrastructure Partners
BIP
$18.4B
| $139K | ﹤0.01% |
3,450
-1,650
| -32% | -$63.7K |
|
5709
CALL
Cerus
CERS
$433M
| $139K | ﹤0.01% |
20,500
+12,400
| +153% | +$83.5K |
|
|
CUK
5710
DELISTED
Carnival PLC
CUK
| $139K | ﹤0.01% |
7,562
+4,820
| +176% | +$94.8K |
|
|
DESP
5711
PUT
DELISTED
Despegar.com
DESP
| $139K | ﹤0.01% |
14,300
+12,700
| +794% | +$140K |
|
|
LADR
5712
PUT
Ladder Capital
LADR
$1.23B
| $139K | ﹤0.01% |
11,600
-16,600
| -59% | -$197K |
|
5713
CALL
Rigel Pharmaceuticals
RIGL
$693M
| $139K | ﹤0.01% |
5,270
-2,980
| -36% | -$89.9K |
|
|
SPTN
5714
CALL
DELISTED
SpartanNash
SPTN
| $139K | ﹤0.01% |
5,400
-45,500
| -89% | -$1.1M |
|
5715
CALL
Velocity Financial
VEL
$692M
| $139K | ﹤0.01% |
+10,200
| New | +$131K |
|
5716
Viking Therapeutics
VKTX
$3.8B
| $139K | ﹤0.01% |
+30,400
| New | +$170K |
|
5717
PUT
Asbury Automotive
ABG
$4.24B
| $138K | ﹤0.01% |
800
+300
| +60% | +$55.2K |
|
5718
Brookfield Infrastructure
BIPC
$4.97B
| $138K | ﹤0.01% |
+3,044
| New | +$126K |
|
|
CODX
5719
Co-Diagnostics
CODX
$5.45M
| $138K | ﹤0.01% |
517
-591
| -53% | -$155K |
|
5720
PUT
Entegris
ENTG
$19.1B
| $138K | ﹤0.01% |
1,000
-7,700
| -89% | -$1.08M |
|
5721
CALL
OGE Energy
OGE
$9.79B
| $138K | ﹤0.01% |
3,600
-3,300
| -48% | -$116K |
|
5722
CALL
Precigen
PGEN
$2.36B
| $138K | ﹤0.01% |
37,400
-17,700
| -32% | -$76.2K |
|
5723
Sinclair Inc
SBGI
$1B
| $138K | ﹤0.01% |
5,224
+2,373
| +83% | +$63.4K |
|
|
SNV
5724
PUT
DELISTED
Synovus
SNV
| $138K | ﹤0.01% |
2,900
-1,500
| -34% | -$71K |
|
5725
TechTarget
TTGT
$323M
| $138K | ﹤0.01% |
+1,453
| New | +$137K |
|
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.