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 | |
|---|---|---|---|---|---|---|
|
LPSN
2776
CALL
DELISTED
LivePerson
LPSN
| $999K | ﹤0.01% |
525,600
-37,600
| -7% | -$90.4K |
|
2777
CALL
Elanco Animal Health
ELAN
$11.1B
| $997K | ﹤0.01% |
40,500
-38,800
| -49% | -$897K |
|
2778
CALL
Harley-Davidson
HOG
$2.65B
| $996K | ﹤0.01% |
40,700
+16,600
| +69% | +$399K |
|
2779
PUT
Sun Communities
SUI
$13.7B
| $995K | ﹤0.01% |
8,300
+6,200
| +295% | +$776K |
|
2780
PUT
Valley National Bancorp
VLY
$7.23B
| $995K | ﹤0.01% |
67,900
-42,500
| -38% | -$577K |
|
2781
CALL
Corporacion America
CAAP
$3.9B
| $995K | ﹤0.01% |
39,500
+26,900
| +213% | +$691K |
|
2782
PUT
ICICI Bank
IBN
$100B
| $993K | ﹤0.01% |
34,200
+700
| +2% | +$18.9K |
|
|
TOYO
2783
CALL
TOYO Co
TOYO
$191M
| $991K | ﹤0.01% |
+142,600
| New | +$1.75M |
|
|
PPLC
2784
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $991K | ﹤0.01% |
19,400
-27,300
| -58% | -$1.39M |
|
2785
Range Nuclear Renaissance Index ETF
NUKZ
$705M
| $990K | ﹤0.01% |
14,521
+13,990
| +2,635% | +$989K |
|
2786
PUT
Bank OZK
OZK
$5.11B
| $990K | ﹤0.01% |
19,000
+9,000
| +90% | +$438K |
|
|
XE
2787
PUT
X-Energy Inc
XE
$4.33B
| $990K | ﹤0.01% |
+53,900
| New | +$1.4M |
|
2788
CALL
Bumble
BMBL
$351M
| $989K | ﹤0.01% |
309,100
-91,600
| -23% | -$313K |
|
2789
CALL
Prothena Corp
PRTA
$426M
| $989K | ﹤0.01% |
101,000
+77,700
| +333% | +$767K |
|
2790
PUT
TE Connectivity
TEL
$63.3B
| $988K | ﹤0.01% |
4,900
-30,300
| -86% | -$6.46M |
|
2791
PUT
Coursera
COUR
$1.34B
| $985K | ﹤0.01% |
174,700
+53,900
| +45% | +$306K |
|
2792
PUT
ASP Isotopes
ASPI
$448M
| $985K | ﹤0.01% |
158,400
-54,100
| -25% | -$318K |
|
2793
-1x Short VIX Futures ETF
SVIX
$142M
| $985K | ﹤0.01% |
41,414
-12,863
| -24% | -$260K |
|
2794
Solventum
SOLV
$15.2B
| $985K | ﹤0.01% |
+12,762
| New | +$931K |
|
|
SLVR
2795
Sprott Silver Miners & Physical Silver ETF
SLVR
$745M
| $984K | ﹤0.01% |
19,608
-67,830
| -78% | -$4.01M |
|
2796
CALL
Simpson Manufacturing
SSD
$7.24B
| $984K | ﹤0.01% |
4,700
+3,700
| +370% | +$692K |
|
|
FIGR
2797
PUT
Figure Technology Solutions
FIGR
$7.16B
| $983K | ﹤0.01% |
32,000
-52,600
| -62% | -$1.76M |
|
2798
PUT
NextNav
NN
$2.43B
| $982K | ﹤0.01% |
55,100
-40,800
| -43% | -$789K |
|
|
FRMM
2799
PUT
Forum Markets
FRMM
$66.5M
| $982K | ﹤0.01% |
180,900
+3,200
| +2% | +$14K |
|
2800
AdvisorShares Pure US Cannabis ETF
MSOS
$1.02B
| $982K | ﹤0.01% |
193,286
+134,499
| +229% | +$630K |
|
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.