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 | |
|---|---|---|---|---|---|---|
4251
CALL
Casey's General Stores
CASY
$32.2B
| $263K | ﹤0.01% |
1,300
-1,900
| -59% | -$394K |
|
4252
First Trust Natural Gas ETF
FCG
$647M
| $263K | ﹤0.01% |
11,522
+9,328
| +425% | +$226K |
|
4253
CALL
GATX Corp
GATX
$6.35B
| $263K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$289K |
|
4254
CALL
Kura Oncology
KURA
$800M
| $263K | ﹤0.01% |
19,300
+18,800
| +3,760% | +$290K |
|
4255
PUT
Lear
LEA
$6.54B
| $263K | ﹤0.01% |
2,200
-36,400
| -94% | -$5.03M |
|
4256
iShares US Financial Services ETF
IYG
$2.16B
| $262K | ﹤0.01% |
5,571
+1,479
| +36% | +$77.6K |
|
4257
PUT
System1
SST
$14.3M
| $262K | ﹤0.01% |
4,170
+1,980
| +90% | +$173K |
|
4258
CALL
Vanda Pharmaceuticals
VNDA
$307M
| $262K | ﹤0.01% |
26,600
-3,600
| -12% | -$38K |
|
4259
CALL
Angi Inc
ANGI
$229M
| $261K | ﹤0.01% |
8,870
+7,480
| +538% | +$329K |
|
4260
CenterPoint Energy
CNP
$27.7B
| $261K | ﹤0.01% |
+9,265
| New | +$289K |
|
4261
CALL
Dana Inc
DAN
$2.9B
| $261K | ﹤0.01% |
22,900
+700
| +3% | +$10.6K |
|
4262
CALL
Mattel
MAT
$4.38B
| $261K | ﹤0.01% |
13,800
-39,800
| -74% | -$890K |
|
|
HDSN
4263
CALL
Hudson Technologies
HDSN
$254M
| $260K | ﹤0.01% |
35,500
+4,400
| +14% | +$37K |
|
|
OTLY
4264
Oatly Group
OTLY
$465M
| $260K | ﹤0.01% |
4,958
-2,765
| -36% | -$191K |
|
4265
PUT
Phreesia
PHR
$663M
| $259K | ﹤0.01% |
10,200
-200
| -2% | -$4.99K |
|
|
WRK
4266
CALL
DELISTED
WestRock Company
WRK
| $259K | ﹤0.01% |
8,400
-17,100
| -67% | -$675K |
|
4267
CALL
InterDigital
IDCC
$7.87B
| $258K | ﹤0.01% |
6,400
-4,500
| -41% | -$243K |
|
4268
PUT
Immunocore
IMCR
$1.72B
| $258K | ﹤0.01% |
5,500
-100
| -2% | -$4.77K |
|
4269
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $258K | ﹤0.01% |
7,000
+6,100
| +678% | +$295K |
|
4270
CALL
UGI
UGI
$7.74B
| $258K | ﹤0.01% |
8,000
-9,100
| -53% | -$359K |
|
4271
CALL
Domo
DOMO
$174M
| $257K | ﹤0.01% |
14,300
+2,500
| +21% | +$65.5K |
|
|
BINI
4272
CALL
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
4273
NNN REIT
NNN
$9.04B
| $257K | ﹤0.01% |
+6,464
| New | +$292K |
|
4274
PUT
Emergent Biosolutions
EBS
$373M
| $256K | ﹤0.01% |
12,200
+6,000
| +97% | +$167K |
|
4275
PUT
Mativ Holdings
MATV
$481M
| $256K | ﹤0.01% |
11,600
+10,500
| +955% | +$240K |
|
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.