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 | |
|---|---|---|---|---|---|---|
|
DMTK
6676
PUT
DELISTED
DermTech, Inc. Common Stock
DMTK
| $42K | ﹤0.01% |
10,700
+8,400
| +365% | +$51.7K |
|
|
NM
6677
PUT
DELISTED
Navios Maritime Holdings Inc.
NM
| $42K | ﹤0.01% |
22,200
-11,200
| -34% | -$24.7K |
|
|
TUZ
6678
CALL
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $42K | ﹤0.01% |
500
-1,500
| -75% | -$126K |
|
|
CTIC
6679
CALL
DELISTED
CTI BioPharma Corp. (DE) Common Stock
CTIC
| $42K | ﹤0.01% |
7,300
-8,900
| -55% | -$55.5K |
|
|
SAFE
6680
CALL
DELISTED
Safehold Inc.
SAFE
| $42K | ﹤0.01% |
1,600
-27,900
| -95% | -$1.09M |
|
6681
Applied Optoelectronics
AAOI
$7.57B
| $41K | ﹤0.01% |
+15,229
| New | +$34.3K |
|
6682
PUT
Adtran
ADTN
$689M
| $41K | ﹤0.01% |
2,100
+1,300
| +163% | +$28.4K |
|
6683
PUT
Ceco Environmental
CECO
$3.85B
| $41K | ﹤0.01% |
4,700
+3,600
| +327% | +$30.8K |
|
6684
PUT
Caribou Biosciences
CRBU
$145M
| $41K | ﹤0.01% |
3,900
-4,000
| -51% | -$37.3K |
|
6685
PUT
Douglas Emmett
DEI
$1.98B
| $41K | ﹤0.01% |
2,300
+2,000
| +667% | +$42.6K |
|
6686
PUT
Dorman Products
DORM
$3.98B
| $41K | ﹤0.01% |
500
+300
| +150% | +$29.5K |
|
6687
Descartes Systems
DSGX
$6.44B
| $41K | ﹤0.01% |
656
+27
| +4% | +$1.83K |
|
6688
CALL
8x8 Inc
EGHT
$269M
| $41K | ﹤0.01% |
11,900
-1,000
| -8% | -$4.78K |
|
|
EH
6689
PUT
EHang Holdings
EH
$389M
| $41K | ﹤0.01% |
9,800
-1,000
| -9% | -$6.91K |
|
6690
PUT
Envela
ELA
$563M
| $41K | ﹤0.01% |
8,300
+7,200
| +655% | +$51K |
|
6691
CALL
4D Molecular Therapeutics
FDMT
$532M
| $41K | ﹤0.01% |
5,100
-1,100
| -18% | -$9.96K |
|
6692
Flowers Foods
FLO
$1.49B
| $41K | ﹤0.01% |
+1,686
| New | +$45.6K |
|
|
HEPA
6693
CALL
DELISTED
Hepion Pharmaceuticals
HEPA
| $41K | ﹤0.01% |
81
-27
| -25% | -$16.5K |
|
6694
PUT
Holley
HLLY
$321M
| $41K | ﹤0.01% |
10,300
-3,200
| -24% | -$23.9K |
|
6695
Hallador Energy
HNRG
$670M
| $41K | ﹤0.01% |
7,305
+5,591
| +326% | +$35.5K |
|
6696
iShares Select U.S. REIT ETF
ICF
$2.09B
| $41K | ﹤0.01% |
776
-4,121
| -84% | -$256K |
|
6697
PUT
KLX Energy Services
KLXE
$45M
| $41K | ﹤0.01% |
+5,100
| New | +$30.6K |
|
6698
CALL
Krystal Biotech
KRYS
$10.1B
| $41K | ﹤0.01% |
600
-16,700
| -97% | -$1.21M |
|
6699
PUT
PLAYSTUDIOS Inc
MYPS
$77.9M
| $41K | ﹤0.01% |
12,000
-50,900
| -81% | -$194K |
|
6700
CALL
Neogen
NEOG
$2.63B
| $41K | ﹤0.01% |
3,000
+2,500
| +500% | +$50.3K |
|
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.