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 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2301
Magna International
MGA
$17.4B
| $1.53M | ﹤0.01% |
23,293
+10,839
| +87% | +$677K |
|
2302
PUT
Capricor Therapeutics
CAPR
$486M
| $1.53M | ﹤0.01% |
63,500
-35,800
| -36% | -$1.09M |
|
2303
PUT
Asbury Automotive
ABG
$3.32B
| $1.53M | ﹤0.01% |
+7,600
| New | +$1.5M |
|
2304
CALL
Celanese
CE
$5.17B
| $1.53M | ﹤0.01% |
33,200
-21,900
| -40% | -$1.27M |
|
2305
PUT
One Stop Systems
OSS
$231M
| $1.52M | ﹤0.01% |
83,800
+80,100
| +2,165% | +$1.12M |
|
2306
Veeco
VECO
$3.04B
| $1.52M | ﹤0.01% |
+20,077
| New | +$1.14M |
|
2307
CALL
BBVA Argentina
BBAR
$2.69B
| $1.52M | ﹤0.01% |
77,600
+17,000
| +28% | +$286K |
|
2308
Cincinnati Financial
CINF
$24.9B
| $1.52M | ﹤0.01% |
8,212
+5,140
| +167% | +$852K |
|
|
CRCO
2309
PUT
YieldMax CRCL Option Income Strategy ETF
CRCO
$33.6M
| $1.52M | ﹤0.01% |
192,900
+57,800
| +43% | +$1.21M |
|
2310
PUT
Vodafone
VOD
$38.5B
| $1.52M | ﹤0.01% |
114,700
-15,000
| -12% | -$227K |
|
2311
CALL
Ingersoll Rand
IR
$29.5B
| $1.52M | ﹤0.01% |
18,500
+2,700
| +17% | +$209K |
|
2312
CALL
Millicom
TIGO
$15.5B
| $1.52M | ﹤0.01% |
16,700
-29,500
| -64% | -$2.48M |
|
2313
CALL
Nektar Therapeutics
NKTR
$1.95B
| $1.51M | ﹤0.01% |
21,700
-10,600
| -33% | -$776K |
|
2314
CALL
Recursion Pharmaceuticals
RXRX
$2.01B
| $1.51M | ﹤0.01% |
412,700
+109,500
| +36% | +$365K |
|
2315
PUT
Royalty Pharma
RPRX
$25.9B
| $1.51M | ﹤0.01% |
27,000
-14,600
| -35% | -$760K |
|
2316
CALL
Arcus Biosciences
RCUS
$3.18B
| $1.51M | ﹤0.01% |
49,100
-30,600
| -38% | -$756K |
|
2317
CALL
Viper Energy
VNOM
$7.96B
| $1.51M | ﹤0.01% |
35,700
+18,300
| +105% | +$845K |
|
2318
CALL
Invesco
IVZ
$13.7B
| $1.51M | ﹤0.01% |
57,300
+29,500
| +106% | +$782K |
|
2319
CALL
ADMA Biologics
ADMA
$2.1B
| $1.51M | ﹤0.01% |
180,300
-88,300
| -33% | -$805K |
|
2320
CALL
Crocs
CROX
$6.05B
| $1.51M | ﹤0.01% |
12,500
-4,300
| -26% | -$470K |
|
2321
Lyft
LYFT
$5.63B
| $1.51M | ﹤0.01% |
+103,119
| New | +$1.44M |
|
|
MRP
2322
CALL
Millrose Properties Inc
MRP
$4.51B
| $1.5M | ﹤0.01% |
50,000
+19,300
| +63% | +$559K |
|
|
2323
CALL
One Stop Systems
OSS
$231M
| $1.5M | ﹤0.01% |
82,600
-14,400
| -15% | -$200K |
|
2324
PUT
Pegasystems
PEGA
$5.55B
| $1.5M | ﹤0.01% |
50,100
+48,700
| +3,479% | +$1.74M |
|
2325
PUT
UGI
UGI
$7.83B
| $1.5M | ﹤0.01% |
43,400
-12,900
| -23% | -$456K |
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.