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 | |
|---|---|---|---|---|---|---|
7351
Danaos Corp
DAC
$2.57B
| $23K | ﹤0.01% |
423
-10,995
| -96% | -$730K |
|
7352
Destination XL Group
DXLG
$31.2M
| $23K | ﹤0.01% |
+4,311
| New | +$20.5K |
|
7353
PUT
EnerSys
ENS
$6.79B
| $23K | ﹤0.01% |
+400
| New | +$25.5K |
|
7354
ProShares Trust UltraShort MSCI Japan
EWV
$5.77M
| $23K | ﹤0.01% |
257
-14
| -5% | -$1.05K |
|
7355
PUT
InvenTrust Properties
IVT
$2.75B
| $23K | ﹤0.01% |
1,100
-900
| -45% | -$23.9K |
|
7356
PUT
American Century Diversified Corporate Bond ETF
KORP
$868M
| $23K | ﹤0.01% |
+400
| New | +$18.6K |
|
|
LGO
7357
CALL
Largo
LGO
$58.9M
| $23K | ﹤0.01% |
4,400
-1,200
| -21% | -$7.99K |
|
7358
CALL
LiveOne
LVO
$60.6M
| $23K | ﹤0.01% |
3,330
+2,190
| +192% | +$23.1K |
|
7359
La-Z-Boy
LZB
$1.59B
| $23K | ﹤0.01% |
+1,046
| New | +$27.8K |
|
7360
PUT
Moelis & Co
MC
$5.01B
| $23K | ﹤0.01% |
700
+300
| +75% | +$12.6K |
|
7361
M/I Homes
MHO
$3.77B
| $23K | ﹤0.01% |
+661
| New | +$28.5K |
|
7362
CALL
Modine Manufacturing
MOD
$10.7B
| $23K | ﹤0.01% |
1,800
-34,200
| -95% | -$480K |
|
7363
CALL
NovaGold Resources
NG
$2.56B
| $23K | ﹤0.01% |
5,000
-600
| -11% | -$2.78K |
|
7364
CALL
NerdWallet
NRDS
$582M
| $23K | ﹤0.01% |
2,600
-4,000
| -61% | -$39.2K |
|
7365
OFS Capital
OFS
$44.6M
| $23K | ﹤0.01% |
2,829
-1,151
| -29% | -$11.9K |
|
7366
PUT
Open Text
OTEX
$6.04B
| $23K | ﹤0.01% |
+900
| New | +$31.8K |
|
7367
PUT
Peoples Bancorp
PEBO
$1.49B
| $23K | ﹤0.01% |
+800
| New | +$23.5K |
|
7368
PUT
Provident Financial Services
PFS
$3.2B
| $23K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$25.7K |
|
7369
CALL
Pluri
PLUR
$16.7M
| $23K | ﹤0.01% |
3,738
+475
| +15% | +$3.79K |
|
7370
QuantumScape Corp
QS
$3.17B
| $23K | ﹤0.01% |
2,830
| – | – |
|
7371
CALL
Construction Partners
ROAD
$5.86B
| $23K | ﹤0.01% |
900
-200
| -18% | -$5.24K |
|
|
SEM
7372
DELISTED
Select Medical
SEM
| $23K | ﹤0.01% |
+1,999
| New | +$28.4K |
|
7373
Sphere Entertainment
SPHR
$5.2B
| $23K | ﹤0.01% |
+538
| New | +$30.2K |
|
7374
CALL
Spruce Power Holding Corp
SPRU
$36.2M
| $23K | ﹤0.01% |
3,263
+1,138
| +54% | +$10.8K |
|
7375
PUT
TH International
THCH
$57.3M
| $23K | ﹤0.01% |
+780
| New | +$25.9K |
|
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.