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 | |
|---|---|---|---|---|---|---|
6451
Flux Power
FLUX
$11.2M
| $30K | ﹤0.01% |
7,775
-5,775
| -43% | -$23.3K |
|
6452
PUT
The Greenbrier Companies
GBX
$1.52B
| $30K | ﹤0.01% |
900
-22,500
| -96% | -$749K |
|
6453
CALL
Gogoro
GGR
$50.8M
| $30K | ﹤0.01% |
475
-200
| -30% | -$13.3K |
|
6454
Heritage Insurance Holdings
HRTG
$889M
| $30K | ﹤0.01% |
17,106
-10,660
| -38% | -$17.6K |
|
6455
CALL
Korro Bio
KRRO
$150M
| $30K | ﹤0.01% |
160
-1,268
| -89% | -$130K |
|
|
6456
Korro Bio
KRRO
$150M
| $30K | ﹤0.01% |
+156
| New | +$16.1K |
|
|
LX
6457
PUT
LexinFintech Holdings
LX
$241M
| $30K | ﹤0.01% |
16,200
+1,300
| +9% | +$2.17K |
|
6458
PUT
Methanex
MEOH
$4.3B
| $30K | ﹤0.01% |
800
-68,800
| -99% | -$2.52M |
|
6459
PUT
Insight Enterprises
NSIT
$3.89B
| $30K | ﹤0.01% |
+300
| New | +$28.7K |
|
6460
Pagaya Technologies
PGY
$1.61B
| $30K | ﹤0.01% |
+2,025
| New | +$28K |
|
6461
Red Violet
RDVT
$979M
| $30K | ﹤0.01% |
1,305
-2,213
| -63% | -$45K |
|
6462
PUT
The RealReal
REAL
$1.46B
| $30K | ﹤0.01% |
24,300
-14,400
| -37% | -$20.7K |
|
6463
CALL
RPC Inc
RES
$1.24B
| $30K | ﹤0.01% |
3,400
-9,200
| -73% | -$83.1K |
|
6464
CALL
Sunstone Hotel Investors
SHO
$2.19B
| $30K | ﹤0.01% |
3,200
+2,700
| +540% | +$27.9K |
|
|
SKE
6465
CALL
Skeena Resources
SKE
$3.3B
| $30K | ﹤0.01% |
5,700
+1,400
| +33% | +$7.1K |
|
|
NSLR
6466
Neostellar Capital Corp
NSLR
$269M
| $30K | ﹤0.01% |
+7,896
| New | +$31.2K |
|
6467
Southwest Gas
SWX
$6.47B
| $30K | ﹤0.01% |
499
-546
| -52% | -$37.1K |
|
6468
CALL
Standex International
SXI
$3.59B
| $30K | ﹤0.01% |
300
| – | – |
|
6469
CALL
FlexShares Morningstar US Market Factors Tilt Index Fund
TILT
$2.19B
| $30K | ﹤0.01% |
800
-600
| -43% | -$89.9K |
|
6470
CALL
Towne Bank
TOWN
$3.46B
| $30K | ﹤0.01% |
+1,000
| New | +$31K |
|
6471
Trinity Capital Inc.
TRIN
$1.58B
| $30K | ﹤0.01% |
+2,781
| New | +$32.4K |
|
6472
Direxion Daily Utilities Bull 3X ETF
UTSL
$40M
| $30K | ﹤0.01% |
906
+861
| +1,913% | +$26.5K |
|
6473
PUT
Verrica Pharmaceuticals
VRCA
$89.7M
| $30K | ﹤0.01% |
1,110
-160
| -13% | -$4.27K |
|
6474
CALL
Varex Imaging
VREX
$472M
| $30K | ﹤0.01% |
+1,500
| New | +$31.4K |
|
6475
PUT
VirTra
VTSI
$34.9M
| $30K | ﹤0.01% |
6,600
-7,200
| -52% | -$34.7K |
|
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.