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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2326
PUT
Tenet Healthcare
THC
$20.1B
| $1.16M | ﹤0.01% |
23,800
+15,100
| +174% | +$698K |
|
|
OPTU
2327
CALL
Optimum Communications Inc
OPTU
$316M
| $1.16M | ﹤0.01% |
252,000
-49,200
| -16% | -$242K |
|
2328
ICL Group
ICL
$6.81B
| $1.16M | ﹤0.01% |
158,593
+16,750
| +12% | +$139K |
|
2329
CALL
California Resources
CRC
$4.75B
| $1.16M | ﹤0.01% |
26,600
-4,800
| -15% | -$210K |
|
2330
ICICI Bank
IBN
$106B
| $1.16M | ﹤0.01% |
52,876
+23,660
| +81% | +$527K |
|
2331
CALL
Valmont Industries
VMI
$9.44B
| $1.16M | ﹤0.01% |
3,500
+3,200
| +1,067% | +$1.01M |
|
2332
MBIA
MBI
$288M
| $1.16M | ﹤0.01% |
89,984
+30,045
| +50% | +$343K |
|
2333
United States Brent Oil Fund
BNO
$815M
| $1.16M | ﹤0.01% |
40,871
+2,937
| +8% | +$84.9K |
|
2334
CALL
Ginkgo Bioworks
DNA
$481M
| $1.15M | ﹤0.01% |
17,025
-5,340
| -24% | -$491K |
|
2335
CALL
FuelCell Energy
FCEL
$1.7B
| $1.15M | ﹤0.01% |
13,787
+2,437
| +21% | +$235K |
|
2336
PUT
Freshpet
FRPT
$2.83B
| $1.15M | ﹤0.01% |
21,700
-47,800
| -69% | -$2.84M |
|
2337
PUT
Banco Santander
SAN
$194B
| $1.14M | ﹤0.01% |
387,600
+700
| +0.2% | +$1.91K |
|
2338
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $1.14M | ﹤0.01% |
178,700
+17,400
| +11% | +$136K |
|
2339
IMAX
IMAX
$2.38B
| $1.14M | ﹤0.01% |
77,683
-34,876
| -31% | -$509K |
|
|
NSTG
2340
DELISTED
NanoString Technologies, Inc.
NSTG
| $1.14M | ﹤0.01% |
142,802
+12,716
| +10% | +$110K |
|
|
NKLA
2341
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $1.14M | ﹤0.01% |
17,553
-20,650
| -54% | -$1.73M |
|
2342
CALL
Cytokinetics
CYTK
$11B
| $1.14M | ﹤0.01% |
24,800
-30,200
| -55% | -$1.3M |
|
2343
PUT
HealthEquity
HQY
$7.91B
| $1.13M | ﹤0.01% |
18,400
+15,900
| +636% | +$1.07M |
|
|
STOR
2344
PUT
DELISTED
STORE Capital Corporation
STOR
| $1.13M | ﹤0.01% |
35,400
+15,400
| +77% | +$489K |
|
2345
CALL
Ardelyx
ARDX
$1.24B
| $1.13M | ﹤0.01% |
397,500
+120,600
| +44% | +$204K |
|
2346
CALL
BorgWarner
BWA
$13.2B
| $1.13M | ﹤0.01% |
31,922
-57,027
| -64% | -$1.94M |
|
2347
CALL
ING
ING
$93.8B
| $1.13M | ﹤0.01% |
92,800
-19,900
| -18% | -$216K |
|
2348
Papa John's
PZZA
$999M
| $1.12M | ﹤0.01% |
13,656
+9,829
| +257% | +$773K |
|
2349
PUT
Radware
RDWR
$1.24B
| $1.12M | ﹤0.01% |
56,900
+22,800
| +67% | +$477K |
|
2350
PUT
Twist Bioscience
TWST
$5.62B
| $1.12M | ﹤0.01% |
47,200
+46,000
| +3,833% | +$1.33M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.