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 | |
|---|---|---|---|---|---|---|
|
CRESY
7426
CALL
Cresud
CRESY
$823M
| $11K | ﹤0.01% |
1,769
-833
| -32% | -$4.46K |
|
|
CSW
7427
CSW Industrials
CSW
$5.11B
| $11K | ﹤0.01% |
99
-1
| -1% | -$120 |
|
7428
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$376M
| $11K | ﹤0.01% |
600
| – | – |
|
7429
Donegal Group Class A
DGICA
$732M
| $11K | ﹤0.01% |
815
+520
| +176% | +$7.56K |
|
7430
CALL
Duluth Holdings
DLTH
$154M
| $11K | ﹤0.01% |
1,800
| – | – |
|
7431
PUT
DiaMedica Therapeutics
DMAC
$351M
| $11K | ﹤0.01% |
7,400
-1,800
| -20% | -$2.42K |
|
7432
CALL
Digimarc Corp
DMRC
$146M
| $11K | ﹤0.01% |
600
-2,200
| -79% | -$41K |
|
7433
Enanta Pharmaceuticals
ENTA
$378M
| $11K | ﹤0.01% |
+250
| New | +$11.4K |
|
7434
PUT
Entergy
ETR
$50.4B
| $11K | ﹤0.01% |
200
-600
| -75% | -$32.9K |
|
7435
Evergy
EVRG
$19.2B
| $11K | ﹤0.01% |
177
-2,391
| -93% | -$144K |
|
7436
PUT
Future Fuel
FF
$218M
| $11K | ﹤0.01% |
1,400
-1,400
| -50% | -$10.6K |
|
7437
CALL
Comfort Systems
FIX
$59.8B
| $11K | ﹤0.01% |
100
| – | – |
|
7438
Genprex
GNPX
$3.06M
| – | – |
-1
| Closed | -$56.5K |
|
7439
CALL
Gates Industrial Corporation Ltd.
GTES
$6.53B
| $11K | ﹤0.01% |
+1,000
| New | +$11K |
|
7440
PUT
HUTCHMED
HCM
$1.85B
| $11K | ﹤0.01% |
+800
| New | +$8.74K |
|
7441
Holley
HLLY
$326M
| $11K | ﹤0.01% |
5,525
-989
| -15% | -$3.11K |
|
|
7442
PUT
Holley
HLLY
$326M
| $11K | ﹤0.01% |
5,400
-4,900
| -48% | -$15.4K |
|
7443
Inogen
INGN
$174M
| $11K | ﹤0.01% |
+567
| New | +$12.2K |
|
7444
CALL
INmune Bio
INMB
$47.1M
| $11K | ﹤0.01% |
1,800
-1,000
| -36% | -$7.1K |
|
|
INN
7445
CALL
Summit Hotel Properties
INN
$748M
| $11K | ﹤0.01% |
1,600
-1,500
| -48% | -$11.7K |
|
7446
iShares US Consumer Discretionary ETF
IYC
$1.16B
| $11K | ﹤0.01% |
+200
| New | +$12K |
|
7447
PUT
Katapult Holdings
KPLT
$30.2M
| $11K | ﹤0.01% |
476
-1,336
| -74% | -$31.9K |
|
|
MAPS
7448
DELISTED
WM TECHNOLOGY INC A
MAPS
| $11K | ﹤0.01% |
11,807
-37,262
| -76% | -$53.9K |
|
|
MESO
7449
PUT
Mesoblast
MESO
$1.89B
| $11K | ﹤0.01% |
2,000
-18,900
| -90% | -$118K |
|
7450
PUT
Momentus
MNTS
$85.1M
| $11K | ﹤0.01% |
1
| – | – |
|
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.