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 | |
|---|---|---|---|---|---|---|
5426
Arrowhead Research
ARWR
$12.6B
| $106K | ﹤0.01% |
3,222
-48
| -1% | -$1.94K |
|
|
ATXS
5427
CALL
DELISTED
Astria Therapeutics
ATXS
| $106K | ﹤0.01% |
11,800
+4,000
| +51% | +$26.8K |
|
5428
PUT
Bioceres Crop Solutions
BIOX
$24.1M
| $106K | ﹤0.01% |
8,200
+6,500
| +382% | +$79.8K |
|
5429
CALL
B2Gold
BTG
$5.18B
| $106K | ﹤0.01% |
33,200
-4,800
| -13% | -$15.8K |
|
5430
CALL
Cellebrite
CLBT
$3.94B
| $106K | ﹤0.01% |
27,100
+26,100
| +2,610% | +$131K |
|
5431
PUT
Cytokinetics
CYTK
$10.7B
| $106K | ﹤0.01% |
2,200
-800
| -27% | -$38.5K |
|
|
MESO
5432
PUT
Mesoblast
MESO
$1.92B
| $106K | ﹤0.01% |
20,900
+19,400
| +1,293% | +$117K |
|
5433
CALL
Morningstar
MORN
$7.51B
| $106K | ﹤0.01% |
500
-4,400
| -90% | -$1.05M |
|
5434
CALL
Myriad Genetics
MYGN
$303M
| $106K | ﹤0.01% |
5,600
-3,200
| -36% | -$73.4K |
|
|
NEWP
5435
PUT
New Pacific Metals
NEWP
$970M
| $106K | ﹤0.01% |
50,000
-26,700
| -35% | -$70.9K |
|
5436
Invesco Energy Exploration & Production ETF
PXE
$82.5M
| $106K | ﹤0.01% |
3,850
+986
| +34% | +$27.9K |
|
5437
CALL
SITE Centers
SITC
$166M
| $106K | ﹤0.01% |
12,689
+10,638
| +519% | +$111K |
|
|
SPYM
5438
State Street SPDR Portfolio S&P 500 ETF
SPYM
$167B
| $106K | ﹤0.01% |
+2,529
| New | +$118K |
|
5439
PUT
Texas Capital Bancshares
TCBI
$4.41B
| $106K | ﹤0.01% |
1,800
+1,000
| +125% | +$59.2K |
|
5440
Direxion Daily 7-10 Year Treasury Bull 3X ETF
TYD
$32.2M
| $106K | ﹤0.01% |
3,545
-4,883
| -58% | -$175K |
|
|
THCX
5441
DELISTED
AXS Cannabis ETF
THCX
| $106K | ﹤0.01% |
3,832
+2,588
| +208% | +$94.9K |
|
5442
CALL
Arcturus Therapeutics
ARCT
$177M
| $105K | ﹤0.01% |
7,100
-7,200
| -50% | -$121K |
|
5443
CALL
AtriCure
ATRC
$1.98B
| $105K | ﹤0.01% |
2,700
+2,100
| +350% | +$96.1K |
|
|
BRAG
5444
CALL
Bragg Gaming Group
BRAG
$51.8M
| $105K | ﹤0.01% |
26,100
+18,900
| +263% | +$93.7K |
|
5445
PUT
Cooper Companies
COO
$14.6B
| $105K | ﹤0.01% |
1,600
+800
| +100% | +$61.3K |
|
5446
Denali Therapeutics
DNLI
$3.84B
| $105K | ﹤0.01% |
+3,450
| New | +$112K |
|
5447
CALL
CGI
GIB
$15.4B
| $105K | ﹤0.01% |
1,400
+300
| +27% | +$24.5K |
|
5448
CALL
Itron
ITRI
$4.65B
| $105K | ﹤0.01% |
+2,500
| New | +$124K |
|
5449
CALL
Radiant Logistics
RLGT
$399M
| $105K | ﹤0.01% |
18,500
+10,000
| +118% | +$70.3K |
|
5450
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.96B
| $105K | ﹤0.01% |
6,600
-16,300
| -71% | -$270K |
|
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.