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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
8151
PUT
Pampa Energía
PAM
$4.57B
| $11K | ﹤0.01% |
500
+300
| +150% | +$7.08K |
|
8152
PUT
Park-Ohio Holdings
PKOH
$550M
| $11K | ﹤0.01% |
1,000
| – | – |
|
8153
Invesco NASDAQ Internet ETF
PNQI
$527M
| $11K | ﹤0.01% |
+500
| New | +$12.9K |
|
8154
FreightCar America
RAIL
$263M
| $11K | ﹤0.01% |
3,064
-11,860
| -79% | -$49.5K |
|
8155
RLX Technology
RLX
$2.37B
| $11K | ﹤0.01% |
10,666
-10,208
| -49% | -$15.6K |
|
8156
CALL
Stellus Capital Investment Corp
SCM
$205M
| $11K | ﹤0.01% |
+1,000
| New | +$13K |
|
8157
ProShares Short High Yield
SJB
$51.9M
| $11K | ﹤0.01% |
560
-140
| -20% | -$2.66K |
|
8158
Virgin Galactic
SPCE
$315M
| $11K | ﹤0.01% |
122
| – | – |
|
8159
CALL
SiriusPoint
SPNT
$3.03B
| $11K | ﹤0.01% |
2,400
+500
| +26% | +$2.32K |
|
8160
Spruce Power Holding Corp
SPRU
$36.6M
| $11K | ﹤0.01% |
1,665
-26,334
| -94% | -$250K |
|
8161
PUT
Latham Group
SWIM
$660M
| $11K | ﹤0.01% |
+3,100
| New | +$17.7K |
|
8162
Tucows
TCX
$104M
| $11K | ﹤0.01% |
320
+1
| +0.3% | +$46 |
|
|
TGNA
8163
DELISTED
TEGNA Inc
TGNA
| $11K | ﹤0.01% |
+564
| New | +$11.9K |
|
|
TOUR
8164
CALL
Tuniu
TOUR
$56.2M
| $11K | ﹤0.01% |
+1,670
| New | +$15.4K |
|
|
TSVT
8165
CALL
DELISTED
2seventy bio
TSVT
| $11K | ﹤0.01% |
800
-800
| -50% | -$11.9K |
|
|
UBX
8166
DELISTED
Unity Biotechnology
UBX
| $11K | ﹤0.01% |
2,997
+2,022
| +207% | +$12.8K |
|
8167
CALL
Universal Insurance Holdings
UVE
$1.26B
| $11K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$13.2K |
|
8168
Veritone
VERI
$92.9M
| $11K | ﹤0.01% |
1,971
-2,099
| -52% | -$14.8K |
|
8169
PUT
John Wiley & Sons Class A
WLY
$2.83B
| $11K | ﹤0.01% |
+300
| New | +$14.3K |
|
|
WPRT
8170
CALL
Westport Fuel Systems
WPRT
$31.9M
| $11K | ﹤0.01% |
1,350
+200
| +17% | +$2.21K |
|
8171
WSFS Financial
WSFS
$4.14B
| $11K | ﹤0.01% |
242
+224
| +1,244% | +$10.5K |
|
8172
CALL
TeraWulf
WULF
$7.48B
| $11K | ﹤0.01% |
+9,400
| New | +$13.1K |
|
8173
PUT
Zedge
ZDGE
$38.3M
| $11K | ﹤0.01% |
5,000
+1,200
| +32% | +$3.44K |
|
|
QCLS
8174
Q/C Technologies Inc
QCLS
$19.7M
| $11K | ﹤0.01% |
1
-2
| -67% | -$22K |
|
|
ENFY
8175
PUT
DELISTED
Enlightify Inc
ENFY
| $11K | ﹤0.01% |
+2,000
| New | +$11.5K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.