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 | |
|---|---|---|---|---|---|---|
5826
CALL
BigBear.ai
BBAI
$1.51B
| $79K | ﹤0.01% |
50,500
-108,200
| -68% | -$238K |
|
5827
CALL
CareDx
CDNA
$2.48B
| $79K | ﹤0.01% |
4,700
-1,600
| -25% | -$34.3K |
|
5828
CALL
Digi International
DGII
$2.65B
| $79K | ﹤0.01% |
2,300
-11,500
| -83% | -$357K |
|
5829
PUT
Insteel Industries
IIIN
$602M
| $79K | ﹤0.01% |
3,000
+2,800
| +1,400% | +$86.8K |
|
5830
Kratos Defense & Security Solutions
KTOS
$9.73B
| $79K | ﹤0.01% |
7,842
+6,943
| +772% | +$93K |
|
|
CYPH
5831
CALL
Cypherpunk Technologies Inc
CYPH
$67.8M
| $79K | ﹤0.01% |
8,980
-8,290
| -48% | -$101K |
|
|
MAPS
5832
DELISTED
WM TECHNOLOGY INC A
MAPS
| $79K | ﹤0.01% |
49,069
-6,002
| -11% | -$17K |
|
5833
PUT
MasterCraft Boat Holdings
MCFT
$582M
| $79K | ﹤0.01% |
4,200
-1,200
| -22% | -$27.6K |
|
|
NEXN
5834
PUT
Nexxen International
NEXN
$573M
| $79K | ﹤0.01% |
11,400
+10,000
| +714% | +$88K |
|
5835
Navitas Semiconductor
NVTS
$3.01B
| $79K | ﹤0.01% |
16,367
+15,298
| +1,431% | +$79.4K |
|
5836
PUT
Pangaea Logistics
PANL
$498M
| $79K | ﹤0.01% |
17,100
-1,600
| -9% | -$7.85K |
|
5837
RenaissanceRe
RNR
$13.4B
| $79K | ﹤0.01% |
+566
| New | +$78.5K |
|
5838
CALL
Cambria Tail Risk ETF
TAIL
$147M
| $79K | ﹤0.01% |
4,300
-37,800
| -90% | -$629K |
|
5839
CALL
Wyndham Hotels & Resorts
WH
$5.59B
| $79K | ﹤0.01% |
1,300
-6,000
| -82% | -$402K |
|
5840
Weis Markets
WMK
$1.94B
| $79K | ﹤0.01% |
1,112
+401
| +56% | +$31.3K |
|
|
KLRS
5841
CALL
Kalaris Therapeutics
KLRS
$96.4M
| $79K | ﹤0.01% |
439
-9
| -2% | -$1.4K |
|
|
ALLG
5842
PUT
DELISTED
Allego N.V.
ALLG
| $79K | ﹤0.01% |
+18,300
| New | +$81.2K |
|
|
SCPL
5843
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $79K | ﹤0.01% |
6,797
-155
| -2% | -$1.93K |
|
|
VLTA
5844
DELISTED
Volta Inc.
VLTA
| $79K | ﹤0.01% |
65,376
+40,897
| +167% | +$82.9K |
|
|
LGV
5845
PUT
DELISTED
Longview Acquisition Corp. II
LGV
| $79K | ﹤0.01% |
8,100
+100
| +1% | +$982 |
|
5846
AMC Global Media
AMCX
$479M
| $78K | ﹤0.01% |
3,857
+3,230
| +515% | +$89.1K |
|
|
AMWD
5847
PUT
DELISTED
American Woodmark
AMWD
| $78K | ﹤0.01% |
1,800
-3,300
| -65% | -$161K |
|
5848
BJ's Restaurants
BJRI
$1.45B
| $78K | ﹤0.01% |
3,284
+3,241
| +7,537% | +$79.8K |
|
5849
PUT
GrafTech
EAF
$195M
| $78K | ﹤0.01% |
1,810
+350
| +24% | +$22.3K |
|
5850
PUT
Highwoods Properties
HIW
$3.67B
| $78K | ﹤0.01% |
2,900
+800
| +38% | +$25.8K |
|
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.