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 | |
|---|---|---|---|---|---|---|
3651
Pricesmart
PSMT
$5.34B
| $480K | ﹤0.01% |
+2,458
| New | +$410K |
|
3652
Select Water Solutions
WTTR
$2.6B
| $479K | ﹤0.01% |
23,996
+20,106
| +517% | +$352K |
|
3653
CALL
Patterson-UTI
PTEN
$4.14B
| $479K | ﹤0.01% |
52,200
-6,900
| -12% | -$77K |
|
3654
CALL
Pebblebrook Hotel Trust
PEB
$2.11B
| $477K | ﹤0.01% |
24,600
+1,100
| +5% | +$17K |
|
3655
Schneider National
SNDR
$5.54B
| $476K | ﹤0.01% |
+13,019
| New | +$425K |
|
3656
PUT
Corebridge Financial
CRBG
$15.1B
| $475K | ﹤0.01% |
16,600
-6,900
| -29% | -$187K |
|
|
IVSS
3657
CALL
Applied Finance IVS US SMID ETF
IVSS
$26.6M
| $475K | ﹤0.01% |
7,400
+7,000
| +1,750% | +$197K |
|
3658
Hormel Foods
HRL
$11B
| $475K | ﹤0.01% |
19,134
-1,492
| -7% | -$33.2K |
|
3659
Kulicke & Soffa
KLIC
$4.8B
| $475K | ﹤0.01% |
+3,549
| New | +$348K |
|
|
GTM
3660
ZoomInfo Technologies
GTM
$1.05B
| $475K | ﹤0.01% |
161,972
+157,705
| +3,696% | +$709K |
|
3661
Richtech Robotics
RR
$353M
| $475K | ﹤0.01% |
224,901
+183,700
| +446% | +$446K |
|
3662
PUT
APi Group
APG
$16.6B
| $474K | ﹤0.01% |
11,200
+11,100
| +11,100% | +$485K |
|
3663
CALL
Choice Hotels
CHH
$4.64B
| $474K | ﹤0.01% |
4,300
-7,700
| -64% | -$852K |
|
3664
CALL
Pool Corp
POOL
$5.93B
| $473K | ﹤0.01% |
2,200
+300
| +16% | +$59.9K |
|
3665
PUT
Alliance Resource Partners
ARLP
$3.19B
| $472K | ﹤0.01% |
19,700
-800
| -4% | -$20.3K |
|
3666
Crescent Energy
CRGY
$4.29B
| $472K | ﹤0.01% |
+48,088
| New | +$588K |
|
3667
PUT
BlackLine
BL
$1.54B
| $472K | ﹤0.01% |
16,800
+11,800
| +236% | +$353K |
|
3668
T-Rex 2X Long NVIDIA Daily Target ETF
NVDX
$491M
| $471K | ﹤0.01% |
27,738
-27,083
| -49% | -$507K |
|
3669
Dentsply Sirona
XRAY
$1.85B
| $471K | ﹤0.01% |
44,368
+18,609
| +72% | +$203K |
|
3670
CALL
Cooper-Standard Automotive
CPS
$387M
| $471K | ﹤0.01% |
17,400
-10,500
| -38% | -$309K |
|
|
GOLD
3671
CALL
Gold.com Inc
GOLD
$1.25B
| $470K | ﹤0.01% |
11,300
+400
| +4% | +$17.2K |
|
3672
PUT
Golub Capital BDC
GBDC
$3.24B
| $470K | ﹤0.01% |
36,500
+29,500
| +421% | +$384K |
|
3673
CALL
Wave Life Sciences
WVE
$723M
| $470K | ﹤0.01% |
80,900
-40,600
| -33% | -$269K |
|
3674
CALL
Agree Realty
ADC
$8.37B
| $470K | ﹤0.01% |
6,200
+5,400
| +675% | +$409K |
|
|
WBI
3675
PUT
WaterBridge Infrastructure LLC
WBI
$1.61B
| $469K | ﹤0.01% |
13,700
-10,900
| -44% | -$317K |
|
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.