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 | |
|---|---|---|---|---|---|---|
3151
iShares 7-10 Year Treasury Bond ETF
IEF
$47.3B
| $810K | ﹤0.01% |
+7,047
| New | +$810K |
|
|
VSXY
3152
CALL
Victoria's Secret
VSXY
$6.78B
| $810K | ﹤0.01% |
+14,600
| New | +$761K |
|
|
JHG
3153
CALL
DELISTED
Janus Henderson
JHG
| $809K | ﹤0.01% |
19,300
+18,700
| +3,117% | +$826K |
|
3154
First Trust Health Care AlphaDEX Fund
FXH
$1.02B
| $808K | ﹤0.01% |
+6,513
| New | +$780K |
|
3155
CALL
Power Integrations
POWI
$3.53B
| $808K | ﹤0.01% |
8,700
+8,100
| +1,350% | +$795K |
|
3156
CALL
Calix
CALX
$2.32B
| $807K | ﹤0.01% |
10,100
-6,300
| -38% | -$411K |
|
|
CVAC
3157
PUT
DELISTED
CureVac
CVAC
| $806K | ﹤0.01% |
23,500
-42,300
| -64% | -$1.7M |
|
3158
PUT
Organon & Co
OGN
$3.56B
| $806K | ﹤0.01% |
26,500
+6,700
| +34% | +$218K |
|
|
ORGN
3159
CALL
DELISTED
Origin Materials
ORGN
| $806K | ﹤0.01% |
4,167
-6,963
| -63% | -$1.38M |
|
3160
SSR Mining
SSRM
$5.45B
| $806K | ﹤0.01% |
45,571
-5,781
| -11% | -$98.9K |
|
3161
PUT
argenx
ARGX
$55.6B
| $805K | ﹤0.01% |
2,300
+1,000
| +77% | +$304K |
|
3162
CALL
Inspire Medical Systems
INSP
$1.47B
| $805K | ﹤0.01% |
3,500
+3,200
| +1,067% | +$781K |
|
3163
CALL
Autohome
ATHM
$2.46B
| $804K | ﹤0.01% |
27,300
+20,300
| +290% | +$773K |
|
3164
CALL
Krystal Biotech
KRYS
$10.4B
| $804K | ﹤0.01% |
11,500
+11,400
| +11,400% | +$664K |
|
|
LUXA
3165
CALL
DELISTED
Lux Health Tech Acquisition Corp. Class A Common Stock
LUXA
| $804K | ﹤0.01% |
82,100
-129,400
| -61% | -$1.27M |
|
3166
CALL
Assured Guaranty
AGO
$3.78B
| $803K | ﹤0.01% |
16,000
+10,200
| +176% | +$525K |
|
3167
CALL
Gartner
IT
$9.87B
| $802K | ﹤0.01% |
2,400
-1,800
| -43% | -$579K |
|
3168
iShares MSCI Hong Kong ETF
EWH
$1.23B
| $801K | ﹤0.01% |
+34,566
| New | +$830K |
|
3169
CALL
Amplify Energy
AMPY
$155M
| $800K | ﹤0.01% |
257,400
+190,700
| +286% | +$640K |
|
3170
PUT
Travere Therapeutics
TVTX
$5.27B
| $800K | ﹤0.01% |
25,800
-11,100
| -30% | -$313K |
|
3171
PUT
Leslie's
LESL
$10.8M
| $799K | ﹤0.01% |
1,690
+125
| +8% | +$53.9K |
|
3172
PUT
Annaly Capital Management
NLY
$16.9B
| $798K | ﹤0.01% |
25,525
+525
| +2% | +$17.6K |
|
3173
PUT
Performance Food Group
PFGC
$18B
| $798K | ﹤0.01% |
17,400
-15,200
| -47% | -$691K |
|
|
SKX
3174
PUT
DELISTED
Skechers
SKX
| $798K | ﹤0.01% |
18,400
-2,100
| -10% | -$94.1K |
|
3175
PUT
Toast
TOST
$17.9B
| $798K | ﹤0.01% |
+23,000
| New | +$1.06M |
|
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.