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 | |
|---|---|---|---|---|---|---|
8326
CALL
LHA Market State Tactical Beta ETF
MSTB
$192M
| $9K | ﹤0.01% |
+1,000
| New | +$26K |
|
8327
CALL
Manitowoc
MTW
$527M
| $9K | ﹤0.01% |
1,200
-100
| -8% | -$1.01K |
|
8328
CALL
OneWater Marine
ONEW
$217M
| $9K | ﹤0.01% |
300
-500
| -63% | -$18.3K |
|
|
OTRK
8329
DELISTED
Ontrak
OTRK
| $9K | ﹤0.01% |
225
+175
| +350% | +$12.3K |
|
8330
CALL
Pampa Energía
PAM
$4.56B
| $9K | ﹤0.01% |
400
-600
| -60% | -$14.2K |
|
8331
Pangaea Logistics
PANL
$493M
| $9K | ﹤0.01% |
2,087
-7,937
| -79% | -$38.9K |
|
8332
Parsons
PSN
$6.64B
| $9K | ﹤0.01% |
+233
| New | +$9.66K |
|
|
REE
8333
DELISTED
REE Automotive
REE
| $9K | ﹤0.01% |
456
+165
| +57% | +$5.68K |
|
8334
PUT
Riskified
RSKD
$720M
| $9K | ﹤0.01% |
2,400
-73,200
| -97% | -$343K |
|
8335
Invesco S&P SmallCap 600 Revenue ETF
RWJ
$2.09B
| $9K | ﹤0.01% |
300
| – | – |
|
8336
CALL
Sanmina
SANM
$9.24B
| $9K | ﹤0.01% |
200
-1,200
| -86% | -$55.9K |
|
|
ECHO
8337
PUT
EchoStar
ECHO
$24.9B
| $9K | ﹤0.01% |
600
-1,200
| -67% | -$22.4K |
|
8338
Scholastic
SCHL
$766M
| $9K | ﹤0.01% |
298
+270
| +964% | +$11.3K |
|
8339
PUT
Stepan Co
SCL
$1.32B
| $9K | ﹤0.01% |
+100
| New | +$10.4K |
|
8340
ProShares UltraShort Semiconductors
SSG
$53.7M
| $9K | ﹤0.01% |
+3
| New | +$7.92K |
|
8341
SunCoke Energy
SXC
$779M
| $9K | ﹤0.01% |
1,654
-13,866
| -89% | -$93.1K |
|
8342
ThredUp
TDUP
$760M
| $9K | ﹤0.01% |
+5,068
| New | +$12.7K |
|
8343
Gentherm
THRM
$1.29B
| $9K | ﹤0.01% |
+188
| New | +$11.4K |
|
8344
CALL
Victory Capital Holdings
VCTR
$6.28B
| $9K | ﹤0.01% |
400
+100
| +33% | +$2.65K |
|
8345
PUT
Valley National Bancorp
VLY
$8.01B
| $9K | ﹤0.01% |
900
-4,400
| -83% | -$50.7K |
|
8346
WhiteHorse Finance
WHF
$139M
| $9K | ﹤0.01% |
+868
| New | +$12K |
|
|
XNET
8347
CALL
Xunlei
XNET
$334M
| $9K | ﹤0.01% |
6,500
-7,500
| -54% | -$11.8K |
|
|
YALA
8348
Yalla Group
YALA
$824M
| $9K | ﹤0.01% |
3,073
-13,882
| -82% | -$56.7K |
|
|
CMRX
8349
PUT
DELISTED
Chimerix, Inc.
CMRX
| $9K | ﹤0.01% |
4,800
-900
| -16% | -$2.02K |
|
|
SIEN
8350
CALL
DELISTED
Sientra, Inc.
SIEN
| $9K | ﹤0.01% |
+1,530
| New | +$12.1K |
|
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.