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 | |
|---|---|---|---|---|---|---|
2101
Alkermes
ALKS
$6.85B
| $1.9M | ﹤0.01% |
36,189
+23,051
| +175% | +$900K |
|
2102
Equinor
EQNR
$100B
| $1.89M | ﹤0.01% |
60,339
+10,902
| +22% | +$407K |
|
2103
PUT
SK Telecom
SKM
$13.9B
| $1.89M | ﹤0.01% |
58,900
-47,700
| -45% | -$1.77M |
|
2104
PUT
The RealReal
REAL
$1.07B
| $1.89M | ﹤0.01% |
160,300
+22,500
| +16% | +$240K |
|
2105
PUT
Tilray
TLRY
$580M
| $1.88M | ﹤0.01% |
419,600
-32,800
| -7% | -$188K |
|
2106
PUT
Universal Technical Institute
UTI
$1.12B
| $1.88M | ﹤0.01% |
44,000
-33,400
| -43% | -$1.28M |
|
2107
CALL
M/I Homes
MHO
$3.51B
| $1.88M | ﹤0.01% |
11,700
+2,400
| +26% | +$321K |
|
2108
CALL
Ecopetrol
EC
$34.1B
| $1.88M | ﹤0.01% |
132,100
+104,800
| +384% | +$1.52M |
|
|
MPT
2109
CALL
Medical Properties Trust
MPT
$2.13B
| $1.88M | ﹤0.01% |
406,800
-244,900
| -38% | -$1.21M |
|
|
VISN
2110
Vistance Networks Inc
VISN
$1.43B
| $1.88M | ﹤0.01% |
146,991
+124,865
| +564% | +$1.76M |
|
2111
Xylem
XYL
$24B
| $1.88M | ﹤0.01% |
+15,889
| New | +$1.83M |
|
|
RZLV
2112
CALL
Rezolve AI
RZLV
$909M
| $1.88M | ﹤0.01% |
596,100
-106,000
| -15% | -$279K |
|
2113
PUT
Vanguard FTSE Europe ETF
VGK
$30B
| $1.88M | ﹤0.01% |
21,600
+4,600
| +27% | +$403K |
|
2114
CALL
QuinStreet
QNST
$825M
| $1.88M | ﹤0.01% |
128,100
+108,000
| +537% | +$1.36M |
|
2115
CALL
ZTO Express
ZTO
$14.7B
| $1.88M | ﹤0.01% |
83,800
+54,100
| +182% | +$1.29M |
|
2116
NetApp
NTAP
$39.5B
| $1.87M | ﹤0.01% |
+12,081
| New | +$1.58M |
|
2117
PUT
Genesco
GCO
$374M
| $1.87M | ﹤0.01% |
55,300
+17,500
| +46% | +$614K |
|
2118
CALL
Crown Holdings
CCK
$11.8B
| $1.87M | ﹤0.01% |
16,700
+11,700
| +234% | +$1.18M |
|
2119
CALL
AmpliTech
AMPG
$100M
| $1.86M | ﹤0.01% |
267,800
+213,500
| +393% | +$894K |
|
2120
Ormat Technologies
ORA
$5.76B
| $1.86M | ﹤0.01% |
17,109
+16,836
| +6,167% | +$2.09M |
|
2121
Fortune Brands Innovations
FBIN
$4.7B
| $1.86M | ﹤0.01% |
33,898
+14,737
| +77% | +$590K |
|
2122
PUT
Zimmer Biomet
ZBH
$17.4B
| $1.86M | ﹤0.01% |
21,600
+5,500
| +34% | +$482K |
|
2123
CALL
Bit Digital
BTBT
$635M
| $1.86M | ﹤0.01% |
1,032,900
+174,700
| +20% | +$308K |
|
2124
PUT
PubMatic
PUBM
$847M
| $1.86M | ﹤0.01% |
141,500
+141,100
| +35,275% | +$1.47M |
|
2125
PUT
Darden Restaurants
DRI
$22.7B
| $1.85M | ﹤0.01% |
9,000
+1,500
| +20% | +$301K |
|
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.