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 | |
|---|---|---|---|---|---|---|
1451
CALL
Aurora
AUR
$12.1B
| $3.62M | ﹤0.01% |
530,300
+127,600
| +32% | +$781K |
|
1452
PUT
Comstock
LODE
$195M
| $3.62M | ﹤0.01% |
869,000
+55,400
| +7% | +$202K |
|
1453
Wells Fargo
WFC
$251B
| $3.61M | ﹤0.01% |
43,709
+20,764
| +90% | +$1.67M |
|
1454
CALL
Canadian Solar
CSIQ
$733M
| $3.61M | ﹤0.01% |
225,400
-300
| -0.1% | -$4.81K |
|
1455
CALL
Sterling Infrastructure
STRL
$15.7B
| $3.61M | ﹤0.01% |
4,300
+400
| +10% | +$281K |
|
1456
JFrog
FROG
$11B
| $3.61M | ﹤0.01% |
39,699
+29,001
| +271% | +$1.88M |
|
1457
PUT
Flutter Entertainment
FLUT
$14.4B
| $3.61M | ﹤0.01% |
35,300
+33,000
| +1,435% | +$3.4M |
|
1458
CALL
Viatris
VTRS
$20.5B
| $3.61M | ﹤0.01% |
227,100
-811,200
| -78% | -$12.6M |
|
1459
CALL
Molson Coors Class B
TAP
$6.7B
| $3.6M | ﹤0.01% |
92,500
+64,100
| +226% | +$2.68M |
|
1460
PUT
GE HealthCare
GEHC
$30.1B
| $3.6M | ﹤0.01% |
56,300
+30,300
| +117% | +$1.99M |
|
1461
PUT
Critical Metals Corp
CRML
$1.15B
| $3.6M | ﹤0.01% |
351,500
+154,700
| +79% | +$1.65M |
|
1462
Enbridge
ENB
$104B
| $3.6M | ﹤0.01% |
66,457
+43,992
| +196% | +$2.41M |
|
1463
PUT
Aehr Test Systems
AEHR
$3.41B
| $3.6M | ﹤0.01% |
37,500
+11,600
| +45% | +$1.06M |
|
1464
PUT
SentinelOne
S
$7.79B
| $3.59M | ﹤0.01% |
211,500
+87,000
| +70% | +$1.34M |
|
|
PURR
1465
PUT
Hyperliquid Strategies Inc
PURR
$2.54B
| $3.59M | ﹤0.01% |
455,800
+441,700
| +3,133% | +$3.27M |
|
1466
PUT
Rackspace Technology
RXT
$1.01B
| $3.59M | ﹤0.01% |
549,200
+165,900
| +43% | +$647K |
|
1467
PUT
Schwab US Broad Market ETF
SCHB
$44.8B
| $3.58M | ﹤0.01% |
112,700
+6,500
| +6% | +$182K |
|
1468
PUT
HubSpot
HUBS
$10.7B
| $3.58M | ﹤0.01% |
19,600
+16,300
| +494% | +$3.41M |
|
1469
CALL
Dave Inc
DAVE
$4.14B
| $3.58M | ﹤0.01% |
9,600
+1,400
| +17% | +$364K |
|
1470
PUT
Advance Auto Parts
AAP
$2.52B
| $3.57M | ﹤0.01% |
57,400
-4,200
| -7% | -$238K |
|
1471
CALL
Antero Resources
AR
$10.8B
| $3.57M | ﹤0.01% |
101,500
-50,500
| -33% | -$1.86M |
|
1472
CALL
Cencora
COR
$58.6B
| $3.57M | ﹤0.01% |
12,600
-8,100
| -39% | -$2.34M |
|
1473
CALL
Kimco Realty
KIM
$15.1B
| $3.56M | ﹤0.01% |
140,600
+132,900
| +1,726% | +$3.19M |
|
1474
CALL
Public Service Enterprise Group
PEG
$33.4B
| $3.56M | ﹤0.01% |
43,900
+3,300
| +8% | +$264K |
|
1475
PUT
LyondellBasell Industries
LYB
$18.8B
| $3.55M | ﹤0.01% |
67,500
-24,300
| -26% | -$1.68M |
|
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.