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 | |
|---|---|---|---|---|---|---|
|
26
CALL
Advanced Micro Devices
AMD
$888B
| $489M | 0.49% |
3,395,200
-935,700
| -22% | -$126M |
|
27
PUT
SPDR Gold Trust
GLD
$132B
| $447M | 0.45% |
2,613,800
-1,657,100
| -39% | -$278M |
|
28
CALL
PayPal
PYPL
$49.3B
| $408M | 0.41% |
2,163,200
+1,454,600
| +205% | +$315M |
|
|
29
CALL
SPDR Gold Trust
GLD
$132B
| $390M | 0.39% |
2,279,300
-1,611,500
| -41% | -$271M |
|
30
CALL
Boeing
BA
$161B
| $375M | 0.38% |
1,860,300
+130,500
| +8% | +$27.6M |
|
31
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $363M | 0.37% |
10,395,000
+5,410,000
| +109% | +$191M |
|
32
PUT
Alibaba
BABA
$283B
| $354M | 0.36% |
2,979,600
+74,100
| +3% | +$10.8M |
|
33
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $310M | 0.31% |
852,900
+97,900
| +13% | +$34.8M |
|
34
CALL
Netflix
NFLX
$286B
| $297M | 0.3% |
4,925,000
-3,492,000
| -41% | -$223M |
|
35
PUT
Salesforce
CRM
$139B
| $295M | 0.3% |
1,161,000
-120,600
| -9% | -$33.9M |
|
36
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $295M | 0.3% |
6,315,700
+1,301,100
| +26% | +$41.5M |
|
37
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $293M | 0.3% |
895,400
+501,200
| +127% | +$212M |
|
38
PUT
GameStop
GME
$9.78B
| $293M | 0.3% |
7,893,600
-8,904,800
| -53% | -$405M |
|
39
PUT
JPMorgan Chase
JPM
$918B
| $288M | 0.29% |
1,824,400
+454,000
| +33% | +$74.6M |
|
|
40
PUT
Micron Technology
MU
$1.1T
| $288M | 0.29% |
3,088,000
+283,000
| +10% | +$22.1M |
|
41
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $286M | 0.29% |
3,329,400
+1,267,600
| +61% | +$85.2M |
|
|
42
PUT
Boeing
BA
$161B
| $283M | 0.29% |
1,405,800
+136,800
| +11% | +$28.9M |
|
43
PUT
Qualcomm
QCOM
$183B
| $278M | 0.28% |
1,522,100
+91,300
| +6% | +$14.6M |
|
|
44
PUT
PayPal
PYPL
$49.3B
| $277M | 0.28% |
1,470,800
+722,200
| +96% | +$156M |
|
45
PUT
AutoZone
AZO
$49.2B
| $277M | 0.28% |
132,300
+62,200
| +89% | +$116M |
|
|
XYZ
46
PUT
Block Inc
XYZ
$47.8B
| $277M | 0.28% |
1,716,000
+456,800
| +36% | +$99M |
|
47
CALL
Pfizer
PFE
$142B
| $275M | 0.28% |
4,691,900
+1,467,800
| +46% | +$72.7M |
|
48
PUT
Adobe
ADBE
$90.3B
| $275M | 0.28% |
484,300
+119,700
| +33% | +$74.8M |
|
49
CALL
Walt Disney
DIS
$167B
| $271M | 0.27% |
1,749,100
+400,700
| +30% | +$64.7M |
|
50
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $268M | 0.27% |
3,220,100
+1,313,500
| +69% | +$218M |
|
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.