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 | |
|---|---|---|---|---|---|---|
6151
CALL
Flowers Foods
FLO
$1.53B
| $61K | ﹤0.01% |
2,500
-7,500
| -75% | -$203K |
|
6152
Genesco
GCO
$435M
| $61K | ﹤0.01% |
1,567
+1,232
| +368% | +$65.8K |
|
6153
CALL
InvenTrust Properties
IVT
$2.72B
| $61K | ﹤0.01% |
2,900
+1,700
| +142% | +$45.1K |
|
6154
CALL
Kennametal
KMT
$2.66B
| $61K | ﹤0.01% |
3,000
+900
| +43% | +$21.8K |
|
6155
Mercer International
MERC
$44.8M
| $61K | ﹤0.01% |
+4,980
| New | +$73.6K |
|
6156
PUT
nCino
NCNO
$2.1B
| $61K | ﹤0.01% |
1,800
-14,200
| -89% | -$479K |
|
6157
Nektar Therapeutics
NKTR
$2.38B
| $61K | ﹤0.01% |
1,287
+307
| +31% | +$18.3K |
|
6158
PUT
NMI Holdings
NMIH
$3.35B
| $61K | ﹤0.01% |
3,000
+1,900
| +173% | +$37.8K |
|
6159
CALL
Quanterix
QTRX
$175M
| $61K | ﹤0.01% |
5,600
+5,500
| +5,500% | +$69.9K |
|
6160
Rexford Industrial Realty
REXR
$8.4B
| $61K | ﹤0.01% |
+1,174
| New | +$72.7K |
|
6161
PUT
Rackspace Technology
RXT
$1.21B
| $61K | ﹤0.01% |
15,100
+6,700
| +80% | +$38.9K |
|
6162
Ryan Specialty Holdings
RYAN
$5.65B
| $61K | ﹤0.01% |
1,526
+1,360
| +819% | +$57.4K |
|
6163
State Street SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.74B
| $61K | ﹤0.01% |
2,569
+200
| +8% | +$4.93K |
|
6164
PUT
Stantec
STN
$8.17B
| $61K | ﹤0.01% |
+1,400
| New | +$65.9K |
|
|
STR
6165
PUT
DELISTED
Sitio Royalties
STR
| $61K | ﹤0.01% |
2,800
-16,000
| -85% | -$415K |
|
|
GGRP
6166
PUT
Glimpse Group
GGRP
$19.5M
| $61K | ﹤0.01% |
11,700
-8,100
| -41% | -$43.1K |
|
|
FFAI
6167
Faraday Future Intelligent Electric
FFAI
$12.6M
| – | – |
0
| – | – |
|
|
ENZ
6168
DELISTED
Enzo Biochem, Inc.
ENZ
| $61K | ﹤0.01% |
27,731
+14,954
| +117% | +$36.1K |
|
|
WRK
6169
PUT
DELISTED
WestRock Company
WRK
| $61K | ﹤0.01% |
2,000
-3,800
| -66% | -$150K |
|
|
CSII
6170
DELISTED
Cardiovascular Systems, Inc.
CSII
| $61K | ﹤0.01% |
+4,415
| New | +$65.6K |
|
|
IBTX
6171
CALL
DELISTED
Independent Bank Group, Inc.
IBTX
| $61K | ﹤0.01% |
1,000
+500
| +100% | +$34.5K |
|
|
AEVA
6172
CALL
Aeva Technologies
AEVA
$1.26B
| $60K | ﹤0.01% |
6,520
+20
| +0.3% | +$316 |
|
|
AFMD
6173
PUT
DELISTED
Affimed
AFMD
| $60K | ﹤0.01% |
2,930
+620
| +27% | +$17.2K |
|
|
ALE
6174
CALL
DELISTED
Allete
ALE
| $60K | ﹤0.01% |
1,200
-100
| -8% | -$5.95K |
|
6175
Anixa Biosciences
ANIX
$116M
| $60K | ﹤0.01% |
12,298
+9,686
| +371% | +$39.3K |
|
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.