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 | |
|---|---|---|---|---|---|---|
451
Affirm
AFRM
$24.8B
| $23.3M | 0.02% |
+231,237
| New | +$30.6M |
|
452
PUT
D.R. Horton
DHI
$40.4B
| $23.2M | 0.02% |
214,000
-67,600
| -24% | -$6.51M |
|
453
CALL
Crocs
CROX
$6.77B
| $23.1M | 0.02% |
179,800
+147,800
| +462% | +$22.8M |
|
454
CALL
Simon Property Group
SPG
$73.4B
| $23M | 0.02% |
143,800
+47,400
| +49% | +$7.23M |
|
455
CALL
Intuit
INTU
$77.8B
| $23M | 0.02% |
35,700
+25,000
| +234% | +$15.4M |
|
456
CALL
Cameco
CCJ
$39.4B
| $22.9M | 0.02% |
1,051,400
-411,200
| -28% | -$9.95M |
|
457
CALL
SoFi Technologies
SOFI
$21.9B
| $22.9M | 0.02% |
1,450,300
+844,900
| +140% | +$15.5M |
|
458
PUT
Nucor
NUE
$53.7B
| $22.9M | 0.02% |
200,600
-45,400
| -18% | -$4.96M |
|
459
PUT
Digital Turbine
APPS
$1.03B
| $22.9M | 0.02% |
375,300
+218,300
| +139% | +$14.9M |
|
460
Occidental Petroleum
OXY
$57.2B
| $22.9M | 0.02% |
788,893
+778,627
| +7,585% | +$24.4M |
|
461
CALL
Wayfair
W
$11.1B
| $22.8M | 0.02% |
119,800
+54,700
| +84% | +$12.9M |
|
462
CALL
MongoDB
MDB
$24.5B
| $22.7M | 0.02% |
42,800
+15,600
| +57% | +$7.99M |
|
463
CALL
NXP Semiconductors
NXPI
$70.4B
| $22.6M | 0.02% |
99,400
+61,400
| +162% | +$13.1M |
|
464
PUT
Biogen
BIIB
$29.2B
| $22.6M | 0.02% |
94,200
-98,900
| -51% | -$25.4M |
|
465
CALL
Diamondback Energy
FANG
$57.1B
| $22.5M | 0.02% |
208,200
-13,800
| -6% | -$1.5M |
|
|
TYNS
466
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $22.3M | 0.02% |
172,300
+18,400
| +12% | +$2.38M |
|
467
Vanguard S&P 500 ETF
VOO
$979B
| $22.3M | 0.02% |
+51,055
| New | +$21.6M |
|
|
XLNX
468
DELISTED
Xilinx Inc
XLNX
| $22.3M | 0.02% |
105,078
+104,544
| +19,578% | +$20.6M |
|
469
PUT
MetLife
MET
$60B
| $22.3M | 0.02% |
356,500
+27,300
| +8% | +$1.71M |
|
470
PUT
Skyworks Solutions
SWKS
$9.5B
| $22.2M | 0.02% |
143,300
-52,400
| -27% | -$8.38M |
|
471
PUT
Philip Morris
PM
$303B
| $22.2M | 0.02% |
233,700
-53,600
| -19% | -$5.01M |
|
472
PUT
ProShares Ultra S&P500
SSO
$8.02B
| $22.2M | 0.02% |
904,400
+727,200
| +410% | +$24.9M |
|
473
CALL
Pinduoduo
PDD
$119B
| $22.2M | 0.02% |
380,400
-437,800
| -54% | -$34.5M |
|
474
CALL
Linde
LIN
$235B
| $22.2M | 0.02% |
64,000
+33,700
| +111% | +$10.9M |
|
|
475
PUT
Diamondback Energy
FANG
$57.1B
| $22M | 0.02% |
203,900
+31,600
| +18% | +$3.42M |
|
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.