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 | |
|---|---|---|---|---|---|---|
|
RUBY
7651
CALL
DELISTED
Rubius Therapeutics, Inc
RUBY
| $18K | ﹤0.01% |
41,900
+19,100
| +84% | +$14.3K |
|
|
EPHY
7652
CALL
DELISTED
Epiphany Technology Acquisition Corp. Class A Common Stock
EPHY
| $18K | ﹤0.01% |
1,900
-18,100
| -91% | -$179K |
|
7653
CALL
American Superconductor
AMSC
$1.43B
| $17K | ﹤0.01% |
4,000
+1,500
| +60% | +$7.76K |
|
7654
PUT
AnaptysBio
ANAB
$1.63B
| $17K | ﹤0.01% |
+700
| New | +$16.4K |
|
7655
CALL
American Outdoor Brands
AOUT
$158M
| $17K | ﹤0.01% |
2,000
+600
| +43% | +$5.1K |
|
7656
PUT
Alphatec Holdings
ATEC
$1.49B
| $17K | ﹤0.01% |
2,000
-7,600
| -79% | -$60.1K |
|
7657
PUT
Autohome
ATHM
$2.63B
| $17K | ﹤0.01% |
600
-3,400
| -85% | -$119K |
|
|
BASE
7658
CALL
DELISTED
Couchbase
BASE
| $17K | ﹤0.01% |
1,200
-300
| -20% | -$4.85K |
|
|
BASE
7659
PUT
DELISTED
Couchbase
BASE
| $17K | ﹤0.01% |
1,200
| – | – |
|
7660
BioAtla
BCAB
$5.61M
| $17K | ﹤0.01% |
45
-424
| -90% | -$139K |
|
7661
CALL
Bright Horizons
BFAM
$4.1B
| $17K | ﹤0.01% |
300
+100
| +50% | +$7.61K |
|
7662
CALL
Biomerica
BMRA
$4.91M
| $17K | ﹤0.01% |
563
+300
| +114% | +$7.77K |
|
7663
PUT
Bassett Furniture
BSET
$168M
| $17K | ﹤0.01% |
1,100
-8,800
| -89% | -$177K |
|
7664
PUT
BeyondSpring
BYSI
$46.5M
| $17K | ﹤0.01% |
17,900
-6,100
| -25% | -$8.66K |
|
7665
PUT
CareDx
CDNA
$1.97B
| $17K | ﹤0.01% |
1,000
-6,100
| -86% | -$131K |
|
|
CLPR
7666
Clipper Realty
CLPR
$45.2M
| $17K | ﹤0.01% |
2,578
-4,068
| -61% | -$34K |
|
7667
Envela
ELA
$563M
| $17K | ﹤0.01% |
+3,382
| New | +$24K |
|
7668
Galectin Therapeutics
GALT
$213M
| $17K | ﹤0.01% |
10,430
-17,441
| -63% | -$32.6K |
|
7669
CALL
G-III Apparel Group
GIII
$1.55B
| $17K | ﹤0.01% |
1,200
-14,600
| -92% | -$298K |
|
7670
Grove Collaborative
GROV
$45.4M
| $17K | ﹤0.01% |
+1,565
| New | +$38.3K |
|
7671
Helen of Troy
HELE
$649M
| $17K | ﹤0.01% |
+182
| New | +$23.4K |
|
7672
CALL
Haverty Furniture Companies
HVT
$403M
| $17K | ﹤0.01% |
700
-3,700
| -84% | -$100K |
|
7673
InflaRx
IFRX
$253M
| $17K | ﹤0.01% |
6,453
+662
| +11% | +$1.49K |
|
7674
CALL
INmune Bio
INMB
$47.1M
| $17K | ﹤0.01% |
2,800
-1,300
| -32% | -$11.4K |
|
7675
Invesco KBW Bank ETF
KBWB
$6.83B
| $17K | ﹤0.01% |
+359
| New | +$19.6K |
|
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.