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 | |
|---|---|---|---|---|---|---|
576
CALL
Fidelity Wise Origin Bitcoin Fund
FBTC
$15.6B
| $15.2M | 0.01% |
298,300
+7,600
| +3% | +$475K |
|
577
PUT
Boston Scientific
BSX
$63.7B
| $15.2M | 0.01% |
356,200
+193,000
| +118% | +$10.5M |
|
578
PUT
Ulta Beauty
ULTA
$23.3B
| $15.2M | 0.01% |
33,700
+19,500
| +137% | +$9.9M |
|
579
CALL
Tilray
TLRY
$580M
| $15.1M | 0.01% |
3,361,600
-1,800
| -0.1% | -$10.3K |
|
580
PUT
Chipotle Mexican Grill
CMG
$39.6B
| $15.1M | 0.01% |
443,900
-275,000
| -38% | -$8.98M |
|
581
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$240M
| $15M | 0.01% |
319,400
+261,000
| +447% | +$13M |
|
582
CALL
Amgen
AMGN
$224B
| $15M | 0.01% |
41,400
-48,400
| -54% | -$16.6M |
|
583
PUT
Teradyne
TER
$62.3B
| $15M | 0.01% |
30,900
+10,500
| +51% | +$3.96M |
|
584
CALL
Wayfair
W
$13.4B
| $14.9M | 0.01% |
161,600
+70,800
| +78% | +$5.22M |
|
585
CALL
Williams Companies
WMB
$84.7B
| $14.9M | 0.01% |
200,800
+21,500
| +12% | +$1.58M |
|
586
PUT
Tower Semiconductor
TSEM
$26.1B
| $14.9M | 0.01% |
57,200
+28,300
| +98% | +$6.78M |
|
587
PUT
Riot Platforms
RIOT
$8.63B
| $14.9M | 0.01% |
544,000
-339,100
| -38% | -$7.64M |
|
588
Charter Communications
CHTR
$12.9B
| $14.9M | 0.01% |
104,727
+42,162
| +67% | +$7.04M |
|
589
CALL
Oneok
OKE
$55.9B
| $14.8M | 0.01% |
170,500
+29,700
| +21% | +$2.62M |
|
590
PUT
Nu Holdings
NU
$65.6B
| $14.8M | 0.01% |
1,107,900
+149,800
| +16% | +$2.02M |
|
591
CALL
Synopsys
SNPS
$81.6B
| $14.8M | 0.01% |
33,100
-8,300
| -20% | -$3.9M |
|
592
CALL
DoorDash
DASH
$83.8B
| $14.7M | 0.01% |
79,800
+15,500
| +24% | +$2.56M |
|
593
CALL
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$181M
| $14.7M | 0.01% |
146,600
+71,600
| +95% | +$1.89M |
|
|
TEM
594
PUT
Tempus AI
TEM
$15.4B
| $14.6M | 0.01% |
252,500
-47,400
| -16% | -$2.38M |
|
595
PUT
Rio Tinto
RIO
$154B
| $14.5M | 0.01% |
152,800
-331,500
| -68% | -$33.6M |
|
596
CALL
Archer Daniels Midland
ADM
$39.1B
| $14.4M | 0.01% |
188,800
-48,400
| -20% | -$3.68M |
|
597
PUT
Blackrock
BLK
$168B
| $14.4M | 0.01% |
15,000
+2,300
| +18% | +$2.38M |
|
598
PUT
Norwegian Cruise Line
NCLH
$6.71B
| $14.4M | 0.01% |
681,200
-51,800
| -7% | -$967K |
|
599
Nokia
NOK
$58.2B
| $14.4M | 0.01% |
+1,081,936
| New | +$13.9M |
|
600
PUT
EQT Corp
EQT
$31.8B
| $14.3M | 0.01% |
269,100
-21,300
| -7% | -$1.2M |
|
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.