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 | |
|---|---|---|---|---|---|---|
6251
PUT
Gentex
GNTX
$4.97B
| $57K | ﹤0.01% |
2,400
-500
| -17% | -$13.7K |
|
6252
CALL
Helen of Troy
HELE
$644M
| $57K | ﹤0.01% |
600
-9,400
| -94% | -$1.21M |
|
|
6253
PUT
Helen of Troy
HELE
$644M
| $57K | ﹤0.01% |
+600
| New | +$77.1K |
|
6254
Immunic
IMUX
$190M
| $57K | ﹤0.01% |
1,812
-775
| -30% | -$32.4K |
|
6255
PUT
Lindsay Corp
LNN
$1.13B
| $57K | ﹤0.01% |
+400
| New | +$60.6K |
|
6256
PUT
Payoneer
PAYO
$2.42B
| $57K | ﹤0.01% |
9,500
+400
| +4% | +$2.32K |
|
|
SLI
6257
CALL
Standard Lithium
SLI
$502M
| $57K | ﹤0.01% |
13,200
-5,400
| -29% | -$28.3K |
|
6258
Smart Sand
SND
$185M
| $57K | ﹤0.01% |
37,086
-39,285
| -51% | -$74.6K |
|
6259
Direxion Daily TSLA Bull 2X ETF
TSLL
$3.12B
| $57K | ﹤0.01% |
+2,695
| New | +$67K |
|
|
CBAY
6260
CALL
DELISTED
Cymabay Therapeutics
CBAY
| $57K | ﹤0.01% |
16,400
-4,900
| -23% | -$17.6K |
|
|
ACLX
6261
CALL
DELISTED
Arcellx
ACLX
| $56K | ﹤0.01% |
+3,000
| New | +$57.4K |
|
6262
CALL
Aqua Metals
AQMS
$8.99M
| $56K | ﹤0.01% |
372
+290
| +354% | +$51.4K |
|
6263
PUT
CrossAmerica Partners
CAPL
$847M
| $56K | ﹤0.01% |
3,000
-4,600
| -61% | -$94.8K |
|
|
CGAU
6264
PUT
Centerra Gold
CGAU
$3.36B
| $56K | ﹤0.01% |
12,700
-6,700
| -35% | -$34.9K |
|
6265
CALL
Community Health Systems
CYH
$393M
| $56K | ﹤0.01% |
26,500
+19,300
| +268% | +$63.9K |
|
6266
CALL
Emergent Biosolutions
EBS
$373M
| $56K | ﹤0.01% |
2,700
-16,500
| -86% | -$459K |
|
6267
CALL
Genpact
G
$5.96B
| $56K | ﹤0.01% |
1,300
+700
| +117% | +$32.2K |
|
6268
PUT
Gaotu Techedu
GOTU
$434M
| $56K | ﹤0.01% |
46,800
-131,200
| -74% | -$212K |
|
6269
Green Brick Partners
GRBK
$3.04B
| $56K | ﹤0.01% |
+2,628
| New | +$64.8K |
|
|
HDV
6270
iShares Core High Dividend ETF
HDV
$14.8B
| $56K | ﹤0.01% |
3,100
-18,025
| -85% | -$364K |
|
6271
CALL
Hess Midstream
HESM
$5.24B
| $56K | ﹤0.01% |
2,200
-11,500
| -84% | -$329K |
|
|
AGIG
6272
Abundia Global Impact Group
AGIG
$42.5M
| $56K | ﹤0.01% |
1,646
+1,484
| +916% | +$60.1K |
|
6273
PUT
Hexcel
HXL
$7.79B
| $56K | ﹤0.01% |
+1,100
| New | +$64K |
|
|
IGMS
6274
CALL
DELISTED
IGM Biosciences
IGMS
| $56K | ﹤0.01% |
2,500
| – | – |
|
|
MTA
6275
CALL
Metalla Royalty & Streaming
MTA
$688M
| $56K | ﹤0.01% |
14,500
+10,600
| +272% | +$46.1K |
|
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.