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 | |
|---|---|---|---|---|---|---|
5001
PUT
Macerich
MAC
$6.49B
| $159K | ﹤0.01% |
6,300
-14,400
| -70% | -$324K |
|
5002
Envista
NVST
$3.75B
| $159K | ﹤0.01% |
+6,022
| New | +$152K |
|
5003
PUT
Champion Homes
SKY
$4.71B
| $159K | ﹤0.01% |
+1,800
| New | +$138K |
|
5004
YieldMax Ultra Option Income Strategy ETF
ULTY
$712M
| $159K | ﹤0.01% |
5,361
-5,208
| -49% | -$162K |
|
5005
PUT
W&T Offshore
WTI
$527M
| $158K | ﹤0.01% |
50,300
+43,400
| +629% | +$161K |
|
5006
Valens Semiconductor
VLN
$198M
| $158K | ﹤0.01% |
70,054
+65,150
| +1,329% | +$146K |
|
5007
PUT
Sonoco
SON
$4.91B
| $158K | ﹤0.01% |
2,800
-1,000
| -26% | -$51.3K |
|
5008
PUT
XP
XP
$10.3B
| $158K | ﹤0.01% |
9,700
+4,800
| +98% | +$85.6K |
|
5009
Progressive
PGR
$122B
| $158K | ﹤0.01% |
722
+360
| +99% | +$72.6K |
|
5010
REX FANG & Innovation Equity Premium Income ETF
FEPI
$721M
| $158K | ﹤0.01% |
3,657
+240
| +7% | +$10.5K |
|
5011
CALL
GeoPark
GPRK
$682M
| $157K | ﹤0.01% |
17,300
+9,000
| +108% | +$87.6K |
|
5012
PUT
Norfolk Southern
NSC
$70.3B
| $157K | ﹤0.01% |
500
-1,800
| -78% | -$555K |
|
5013
PUT
Camping World
CWH
$326M
| $157K | ﹤0.01% |
20,600
-13,800
| -40% | -$100K |
|
5014
International Paper
IP
$17.6B
| $157K | ﹤0.01% |
4,123
-10,242
| -71% | -$351K |
|
|
RWT
5015
Redwood Trust
RWT
$484M
| $157K | ﹤0.01% |
33,105
+31,797
| +2,431% | +$173K |
|
|
CAI
5016
CALL
Caris Life Sciences
CAI
$8.92B
| $157K | ﹤0.01% |
8,800
+6,100
| +226% | +$109K |
|
|
VTEL
5017
PUT
Vanguard Long-Term Tax-Exempt Bond ETF
VTEL
$345M
| $157K | ﹤0.01% |
3,100
-111,300
| -97% | -$11.5M |
|
5018
Globe Life
GL
$12.8B
| $157K | ﹤0.01% |
+877
| New | +$137K |
|
|
NNDM
5019
Nano Dimension
NNDM
$333M
| $157K | ﹤0.01% |
108,031
-114,187
| -51% | -$187K |
|
5020
CALL
Consensus Cloud Solutions
CCSI
$636M
| $156K | ﹤0.01% |
4,100
+4,000
| +4,000% | +$120K |
|
5021
PUT
Icon
ICLR
$13.1B
| $156K | ﹤0.01% |
900
-1,400
| -61% | -$178K |
|
|
GLDB
5022
PUT
IDX Alternative FIAT ETF
GLDB
$37.8M
| $156K | ﹤0.01% |
94,900
+81,100
| +588% | +$1.88M |
|
5023
CALL
Gerdau
GGB
$9.1B
| $156K | ﹤0.01% |
38,600
+38,500
| +38,500% | +$171K |
|
5024
CALL
Manchester United
MANU
$3.59B
| $156K | ﹤0.01% |
6,800
+1,200
| +21% | +$23.8K |
|
5025
CALL
Credicorp
BAP
$30.5B
| $156K | ﹤0.01% |
+400
| New | +$137K |
|
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.