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 | |
|---|---|---|---|---|---|---|
4526
iShares Global Utilities ETF
JXI
$371M
| $231K | ﹤0.01% |
2,720
+2,712
| +33,900% | +$232K |
|
4527
PUT
Simmons First National
SFNC
$3.25B
| $231K | ﹤0.01% |
10,200
| – | – |
|
4528
QuickLogic
QUIK
$205M
| $231K | ﹤0.01% |
+11,562
| New | +$202K |
|
4529
PUT
Malibu Boats
MBUU
$459M
| $230K | ﹤0.01% |
8,400
+6,300
| +300% | +$168K |
|
|
NLOP
4530
CALL
Net Lease Office Properties
NLOP
$148M
| $230K | ﹤0.01% |
20,700
+400
| +2% | +$4.82K |
|
4531
Mistras Group
MG
$680M
| $230K | ﹤0.01% |
13,151
+4,353
| +49% | +$77.5K |
|
|
BZUN
4532
CALL
Baozun
BZUN
$177M
| $230K | ﹤0.01% |
81,100
+60,700
| +298% | +$164K |
|
|
XOMA
4533
CALL
DELISTED
Xoma
XOMA
| $230K | ﹤0.01% |
5,400
-26,500
| -83% | -$1.07M |
|
4534
CALL
Ameriprise Financial
AMP
$43.9B
| $229K | ﹤0.01% |
500
+200
| +67% | +$91.7K |
|
|
HPP
4535
CALL
Hudson Pacific Properties
HPP
$633M
| $229K | ﹤0.01% |
15,100
+100
| +0.7% | +$1.1K |
|
4536
CALL
GoodRx Holdings
GDRX
$1.1B
| $229K | ﹤0.01% |
79,600
-179,700
| -69% | -$457K |
|
4537
PUT
Lennox International
LII
$12.4B
| $229K | ﹤0.01% |
400
+200
| +100% | +$102K |
|
|
SVIA
4538
CALL
Silvia, Inc. Common Stock
SVIA
$338M
| $229K | ﹤0.01% |
148,800
-4,800
| -3% | -$8.8K |
|
4539
Construction Partners
ROAD
$5.22B
| $229K | ﹤0.01% |
1,929
+1,011
| +110% | +$120K |
|
4540
CALL
Arqit Quantum
ARQQ
$420M
| $229K | ﹤0.01% |
7,700
+1,100
| +17% | +$17.9K |
|
4541
Navios Maritime Partners
NMM
$2.63B
| $228K | ﹤0.01% |
3,260
-1,585
| -33% | -$113K |
|
4542
CALL
Village Farms International
VFF
$379M
| $228K | ﹤0.01% |
114,100
+96,000
| +530% | +$240K |
|
4543
BRC Group Holdings
RILY
$198M
| $228K | ﹤0.01% |
+28,383
| New | +$241K |
|
4544
PUT
Atkore
ATKR
$3.2B
| $228K | ﹤0.01% |
3,000
+900
| +43% | +$67.8K |
|
|
CPXR
4545
USCF Daily Target 2X Copper Index ETF
CPXR
$13.9M
| $228K | ﹤0.01% |
7,842
+4,856
| +163% | +$143K |
|
4546
PUT
Ingredion
INGR
$6.08B
| $227K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$233K |
|
|
ETHE
4547
PUT
Grayscale Ethereum Staking ETF Shares
ETHE
$2.04B
| $227K | ﹤0.01% |
17,800
-70,000
| -80% | -$1.17M |
|
|
ELE
4548
PUT
Elemental Royalty Corp
ELE
$1.52B
| $227K | ﹤0.01% |
+13,000
| New | +$228K |
|
4549
PUT
ODDITY Tech
ODD
$826M
| $227K | ﹤0.01% |
15,000
+6,300
| +72% | +$84.4K |
|
4550
PUT
Rigel Pharmaceuticals
RIGL
$913M
| $227K | ﹤0.01% |
5,800
+5,700
| +5,700% | +$176K |
|
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.