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 | |
|---|---|---|---|---|---|---|
1451
Boston Scientific
BSX
$65.8B
| $3.62M | ﹤0.01% |
+93,442
| New | +$3.75M |
|
1452
CALL
Lemonade
LMND
$4.62B
| $3.62M | ﹤0.01% |
170,900
-11,100
| -6% | -$252K |
|
1453
CALL
American Eagle Outfitters
AEO
$2.85B
| $3.61M | ﹤0.01% |
371,400
+121,500
| +49% | +$1.41M |
|
|
SGI
1454
CALL
Somnigroup International
SGI
$15.1B
| $3.61M | ﹤0.01% |
149,700
-52,600
| -26% | -$1.36M |
|
1455
CALL
Fastenal
FAST
$54B
| $3.61M | ﹤0.01% |
156,800
+84,200
| +116% | +$2.12M |
|
1456
CALL
JetBlue
JBLU
$1.96B
| $3.6M | ﹤0.01% |
543,700
-14,800
| -3% | -$120K |
|
1457
PUT
Aon
AON
$77.3B
| $3.59M | ﹤0.01% |
13,400
+7,600
| +131% | +$2.15M |
|
1458
CALL
MSCI
MSCI
$40B
| $3.58M | ﹤0.01% |
8,500
+6,900
| +431% | +$3.16M |
|
1459
CALL
DigitalBridge
DBRG
$2.94B
| $3.58M | ﹤0.01% |
286,200
+201,275
| +237% | +$3.88M |
|
1460
PUT
Johnson Controls International
JCI
$87.5B
| $3.57M | ﹤0.01% |
72,600
-22,300
| -23% | -$1.18M |
|
1461
CALL
Matador Resources
MTDR
$6.31B
| $3.57M | ﹤0.01% |
72,900
-8,900
| -11% | -$480K |
|
1462
CALL
Icahn Enterprises
IEP
$5.17B
| $3.56M | ﹤0.01% |
71,700
+40,200
| +128% | +$2.07M |
|
1463
PUT
Flex
FLEX
$43.4B
| $3.56M | ﹤0.01% |
283,315
-265
| -0.1% | -$3.39K |
|
1464
CALL
Cracker Barrel
CBRL
$1.2B
| $3.56M | ﹤0.01% |
38,400
+26,900
| +234% | +$2.7M |
|
1465
CALL
Weyerhaeuser
WY
$17.3B
| $3.55M | ﹤0.01% |
124,400
-44,300
| -26% | -$1.51M |
|
1466
PUT
On Holding
ONON
$11.9B
| $3.54M | ﹤0.01% |
220,400
+65,900
| +43% | +$1.31M |
|
1467
Align Technology
ALGN
$12B
| $3.53M | ﹤0.01% |
17,061
+4,965
| +41% | +$1.28M |
|
1468
PUT
Mattel
MAT
$4.17B
| $3.53M | ﹤0.01% |
186,500
+143,100
| +330% | +$3.2M |
|
1469
CALL
PBF Energy
PBF
$7.29B
| $3.53M | ﹤0.01% |
100,400
-94,900
| -49% | -$3.01M |
|
1470
PUT
Stratasys
SSYS
$697M
| $3.53M | ﹤0.01% |
245,000
+221,500
| +943% | +$3.94M |
|
1471
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $3.51M | ﹤0.01% |
37,400
-22,800
| -38% | -$1.41M |
|
1472
PUT
General Dynamics
GD
$105B
| $3.5M | ﹤0.01% |
16,500
-6,600
| -29% | -$1.49M |
|
1473
CALL
WEC Energy
WEC
$37.7B
| $3.5M | ﹤0.01% |
39,100
-200
| -0.5% | -$20.4K |
|
1474
CALL
Aptiv
APTV
$12B
| $3.5M | ﹤0.01% |
44,700
+21,600
| +94% | +$2.07M |
|
|
CTRA
1475
PUT
DELISTED
Coterra Energy
CTRA
| $3.49M | ﹤0.01% |
133,800
-70,500
| -35% | -$2.02M |
|
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.