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 | |
|---|---|---|---|---|---|---|
2826
PUT
Scorpio Tankers
STNG
$3.91B
| $1.02M | ﹤0.01% |
79,700
-106,100
| -57% | -$1.64M |
|
2827
CRISPR Therapeutics
CRSP
$4.67B
| $1.02M | ﹤0.01% |
13,421
-1,765
| -12% | -$154K |
|
2828
CALL
dLocal
DLO
$4.38B
| $1.02M | ﹤0.01% |
28,500
+26,100
| +1,088% | +$1.13M |
|
2829
CALL
Domo
DOMO
$164M
| $1.02M | ﹤0.01% |
20,500
-11,200
| -35% | -$823K |
|
2830
CALL
Rush Street Interactive
RSI
$3.26B
| $1.02M | ﹤0.01% |
61,600
-85,000
| -58% | -$1.6M |
|
2831
Waters Corp
WAT
$36.5B
| $1.02M | ﹤0.01% |
+2,729
| New | +$955K |
|
2832
Yext
YEXT
$545M
| $1.01M | ﹤0.01% |
102,405
+81,718
| +395% | +$918K |
|
2833
CALL
uniQure
QURE
$2.67B
| $1.01M | ﹤0.01% |
48,800
+10,900
| +29% | +$313K |
|
|
BKI
2834
DELISTED
Black Knight, Inc. Common Stock
BKI
| $1.01M | ﹤0.01% |
12,208
+11,489
| +1,598% | +$857K |
|
2835
Entergy
ETR
$53.6B
| $1.01M | ﹤0.01% |
+17,936
| New | +$942K |
|
2836
PUT
Herbalife
HLF
$1.26B
| $1.01M | ﹤0.01% |
24,700
-35,300
| -59% | -$1.47M |
|
2837
CALL
MKS Inc
MKSI
$20.4B
| $1.01M | ﹤0.01% |
5,800
-1,800
| -24% | -$281K |
|
2838
CALL
NiSource
NI
$22.2B
| $1.01M | ﹤0.01% |
36,600
+26,100
| +249% | +$664K |
|
|
ARR
2839
CALL
Armour Residential REIT
ARR
$2.02B
| $1.01M | ﹤0.01% |
20,580
+6,340
| +45% | +$328K |
|
|
TXNM
2840
TXNM Energy Inc
TXNM
$6.47B
| $1.01M | ﹤0.01% |
22,125
+12,548
| +131% | +$603K |
|
|
SI
2841
DELISTED
Silvergate Capital Corporation
SI
| $1.01M | ﹤0.01% |
6,806
+5,514
| +427% | +$943K |
|
2842
PUT
Gerdau
GGB
$9.34B
| $1.01M | ﹤0.01% |
257,922
+128,268
| +99% | +$487K |
|
2843
PUT
Coursera
COUR
$1.61B
| $1.01M | ﹤0.01% |
41,200
+20,900
| +103% | +$636K |
|
2844
CALL
US Foods
USFD
$21.8B
| $1.01M | ﹤0.01% |
28,900
-64,700
| -69% | -$2.25M |
|
2845
PUT
AtaiBeckley Inc
ATAI
$2.65B
| $1M | ﹤0.01% |
+131,800
| New | +$1.6M |
|
2846
PUT
Knight Transportation
KNX
$11.3B
| $1M | ﹤0.01% |
16,500
-3,300
| -17% | -$187K |
|
2847
CALL
Delek Logistics
DKL
$3.06B
| $1M | ﹤0.01% |
23,500
+14,200
| +153% | +$656K |
|
2848
PUT
Hertz
HTZ
$597M
| $1M | ﹤0.01% |
+163,300
| New | +$3.91M |
|
2849
Direxion Daily Small Cap Bear 3x ETF
TZA
$249M
| $1M | ﹤0.01% |
3,716
+1,436
| +63% | +$391K |
|
2850
PUT
Sociedad Química y Minera de Chile
SQM
$19.4B
| $1M | ﹤0.01% |
19,900
+13,600
| +216% | +$780K |
|
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.