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 | |
|---|---|---|---|---|---|---|
2476
PUT
Genmab
GMAB
$21.7B
| $1.32M | ﹤0.01% |
48,100
+47,300
| +5,913% | +$1.26M |
|
2477
PUT
Molson Coors Class B
TAP
$6.7B
| $1.32M | ﹤0.01% |
33,900
-20,400
| -38% | -$852K |
|
2478
Diageo
DEO
$48.7B
| $1.32M | ﹤0.01% |
16,430
-495
| -3% | -$40K |
|
2479
AstraZeneca
AZN
$258B
| $1.32M | ﹤0.01% |
6,963
-790
| -10% | -$149K |
|
|
BTC
2480
CALL
Grayscale Bitcoin Mini Trust ETF
BTC
$4.45B
| $1.32M | ﹤0.01% |
50,700
-63,600
| -56% | -$2.02M |
|
2481
Comstock
LODE
$195M
| $1.31M | ﹤0.01% |
316,044
-33,282
| -10% | -$121K |
|
2482
PUT
Qiagen
QGEN
$9.12B
| $1.31M | ﹤0.01% |
33,600
-19,600
| -37% | -$728K |
|
2483
CALL
Brookfield Renewable
BEP
$8.51B
| $1.31M | ﹤0.01% |
37,800
-23,700
| -39% | -$823K |
|
|
PR
2484
PUT
Permian Resources
PR
$17.9B
| $1.31M | ﹤0.01% |
71,300
-17,300
| -20% | -$348K |
|
2485
Timken Company
TKR
$8.14B
| $1.31M | ﹤0.01% |
9,021
+7,714
| +590% | +$928K |
|
2486
CALL
Freshpet
FRPT
$2.78B
| $1.31M | ﹤0.01% |
22,100
-200
| -0.9% | -$11.4K |
|
2487
PUT
Cracker Barrel
CBRL
$1.16B
| $1.31M | ﹤0.01% |
24,500
+12,200
| +99% | +$423K |
|
2488
CALL
POSCO
PKX
$17.2B
| $1.31M | ﹤0.01% |
25,400
+24,200
| +2,017% | +$1.66M |
|
2489
CALL
Advanced Energy
AEIS
$11.2B
| $1.31M | ﹤0.01% |
3,500
-17,800
| -84% | -$6.22M |
|
2490
Franco-Nevada
FNV
$49.7B
| $1.3M | ﹤0.01% |
6,257
-2,797
| -31% | -$652K |
|
2491
PUT
UL Solutions
ULS
$13.3B
| $1.3M | ﹤0.01% |
12,800
+12,400
| +3,100% | +$1.17M |
|
2492
Graham Corp
GHM
$1.02B
| $1.3M | ﹤0.01% |
+10,524
| New | +$1.04M |
|
2493
TripAdvisor
TRIP
$986M
| $1.3M | ﹤0.01% |
+94,824
| New | +$1.07M |
|
2494
CALL
NRX Pharmaceuticals
NRXP
$130M
| $1.3M | ﹤0.01% |
317,800
+235,400
| +286% | +$778K |
|
2495
CALL
National Fuel Gas
NFG
$7.51B
| $1.3M | ﹤0.01% |
16,800
+12,600
| +300% | +$1.04M |
|
2496
CALL
Innovative Industrial Properties
IIPR
$1.53B
| $1.3M | ﹤0.01% |
20,900
+11,100
| +113% | +$623K |
|
2497
PUT
Carpenter Technology
CRS
$19.7B
| $1.3M | ﹤0.01% |
2,100
+1,400
| +200% | +$659K |
|
|
JBS
2498
PUT
JBS N.V.
JBS
$38.1B
| $1.3M | ﹤0.01% |
109,300
+26,400
| +32% | +$386K |
|
2499
McEwen Inc
MUX
$1.17B
| $1.29M | ﹤0.01% |
71,422
+65,116
| +1,033% | +$1.41M |
|
2500
PUT
Banco Santander
SAN
$209B
| $1.29M | ﹤0.01% |
93,800
-22,400
| -19% | -$278K |
|
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.