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 | |
|---|---|---|---|---|---|---|
5251
CALL
Tidewater
TDW
$4.19B
| $121K | ﹤0.01% |
5,600
+3,700
| +195% | +$78.9K |
|
|
MTTR
5252
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $121K | ﹤0.01% |
32,148
+26,733
| +494% | +$118K |
|
|
FUV
5253
PUT
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $121K | ﹤0.01% |
4,395
-320
| -7% | -$16K |
|
5254
CALL
Associated Banc-Corp
ASB
$5.99B
| $120K | ﹤0.01% |
6,000
-34,400
| -85% | -$692K |
|
5255
CALL
BioCardia
BCDA
$13.5M
| $120K | ﹤0.01% |
4,127
+4,060
| +6,060% | +$105K |
|
|
KEEL
5256
PUT
Keel Infrastructure Corp
KEEL
$2.48B
| $120K | ﹤0.01% |
114,500
+42,300
| +59% | +$57.8K |
|
5257
CALL
GrafTech
EAF
$200M
| $120K | ﹤0.01% |
2,790
-1,090
| -28% | -$69.3K |
|
5258
CALL
East-West Bancorp
EWBC
$18.3B
| $120K | ﹤0.01% |
1,800
-38,000
| -95% | -$2.7M |
|
5259
PUT
Extra Space Storage
EXR
$31.7B
| $120K | ﹤0.01% |
700
| – | – |
|
5260
PUT
National Vision
EYE
$1.85B
| $120K | ﹤0.01% |
3,700
+1,700
| +85% | +$55.2K |
|
|
OPLN
5261
CALL
Openlane
OPLN
$4.24B
| $120K | ﹤0.01% |
10,800
-7,000
| -39% | -$105K |
|
|
DFTX
5262
Definium Therapeutics
DFTX
$5.62B
| $120K | ﹤0.01% |
34,397
+33,661
| +4,574% | +$323K |
|
5263
CALL
NiSource
NI
$21.3B
| $120K | ﹤0.01% |
4,800
-1,000
| -17% | -$29.5K |
|
|
SII
5264
PUT
Sprott
SII
$2.7B
| $120K | ﹤0.01% |
3,600
+800
| +29% | +$28.7K |
|
|
LENZ
5265
LENZ Therapeutics
LENZ
$158M
| $120K | ﹤0.01% |
5,448
-4,422
| -45% | -$105K |
|
5266
PUT
CarGurus
CARG
$3.34B
| $119K | ﹤0.01% |
8,400
-1,900
| -18% | -$38.5K |
|
5267
CALL
Cardiff Oncology
CRDF
$72.3M
| $119K | ﹤0.01% |
77,700
+69,900
| +896% | +$168K |
|
5268
CALL
Excelerate Energy
EE
$1.25B
| $119K | ﹤0.01% |
5,100
+4,000
| +364% | +$94.8K |
|
5269
Golar LNG
GLNG
$5.03B
| $119K | ﹤0.01% |
4,779
+3,294
| +222% | +$82.2K |
|
5270
CALL
Gentex
GNTX
$5.14B
| $119K | ﹤0.01% |
5,000
+3,900
| +355% | +$107K |
|
|
MAG
5271
DELISTED
MAG Silver
MAG
| $119K | ﹤0.01% |
+9,585
| New | +$119K |
|
5272
CALL
Progress Software
PRGS
$1.72B
| $119K | ﹤0.01% |
2,800
+900
| +47% | +$41.6K |
|
5273
PUT
Rigel Pharmaceuticals
RIGL
$716M
| $119K | ﹤0.01% |
10,130
-1,590
| -14% | -$21.5K |
|
|
HEP
5274
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $119K | ﹤0.01% |
7,300
-79,400
| -92% | -$1.37M |
|
5275
PUT
Archer Aviation
ACHR
$4.05B
| $118K | ﹤0.01% |
45,500
+24,300
| +115% | +$85.4K |
|
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.