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 | |
|---|---|---|---|---|---|---|
2526
CALL
American Tower
AMT
$78.8B
| $1.26M | ﹤0.01% |
7,700
-15,600
| -67% | -$2.81M |
|
2527
PUT
Eledon Pharmaceuticals
ELDN
$215M
| $1.26M | ﹤0.01% |
318,700
+318,100
| +53,017% | +$1.16M |
|
2528
iShares MSCI Mexico ETF
EWW
$1.66B
| $1.25M | ﹤0.01% |
16,654
+12,532
| +304% | +$972K |
|
2529
PUT
Alpha Metallurgical Resources
AMR
$2.21B
| $1.25M | ﹤0.01% |
7,600
+2,100
| +38% | +$400K |
|
2530
Pagaya Technologies
PGY
$1.47B
| $1.25M | ﹤0.01% |
+68,637
| New | +$974K |
|
2531
Southern Company
SO
$95.3B
| $1.25M | ﹤0.01% |
+13,084
| New | +$1.23M |
|
|
DXYZ
2532
PUT
Destiny Tech100
DXYZ
$933M
| $1.25M | ﹤0.01% |
+48,500
| New | +$1.82M |
|
2533
PUT
Nutanix
NTNX
$18.4B
| $1.25M | ﹤0.01% |
24,500
+5,500
| +29% | +$249K |
|
2534
CALL
Align Technology
ALGN
$10.4B
| $1.25M | ﹤0.01% |
7,400
-1,700
| -19% | -$295K |
|
2535
PUT
Baxter International
BAX
$12.1B
| $1.25M | ﹤0.01% |
58,500
-11,300
| -16% | -$211K |
|
|
SMU
2536
CALL
Tradr 2X Long SMR Daily ETF
SMU
$174M
| $1.25M | ﹤0.01% |
11,125
+9,875
| +790% | +$504K |
|
2537
CALL
Emcor
EME
$33.6B
| $1.24M | ﹤0.01% |
1,500
-1,000
| -40% | -$846K |
|
2538
PUT
Teucrium Corn Fund
CORN
$150M
| $1.24M | ﹤0.01% |
69,300
-103,500
| -60% | -$1.85M |
|
2539
PUT
Cedar Fair
FUN
$1.26B
| $1.24M | ﹤0.01% |
58,300
-158,400
| -73% | -$3.23M |
|
|
UCTT
2540
Ultra Clean Holdings
UCTT
$3.52B
| $1.24M | ﹤0.01% |
8,705
+3,495
| +67% | +$308K |
|
2541
PUT
Everspin Technologies
MRAM
$450M
| $1.24M | ﹤0.01% |
51,300
+50,800
| +10,160% | +$1.14M |
|
2542
CALL
Genuine Parts
GPC
$17.9B
| $1.24M | ﹤0.01% |
10,500
+3,100
| +42% | +$324K |
|
|
BIOA
2543
CALL
BioAge Labs
BIOA
$324M
| $1.24M | ﹤0.01% |
50,500
+49,800
| +7,114% | +$900K |
|
2544
PUT
H&R Block
HRB
$5.2B
| $1.24M | ﹤0.01% |
32,500
+30,500
| +1,525% | +$1.06M |
|
2545
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$475M
| $1.24M | ﹤0.01% |
21,900
+14,200
| +184% | +$818K |
|
2546
CALL
A.O. Smith
AOS
$7.97B
| $1.24M | ﹤0.01% |
19,700
+18,300
| +1,307% | +$1.11M |
|
|
SOLS
2547
CALL
Solstice Advanced Materials
SOLS
$9B
| $1.23M | ﹤0.01% |
13,900
+11,800
| +562% | +$973K |
|
|
SGI
2548
PUT
Somnigroup International
SGI
$13.5B
| $1.23M | ﹤0.01% |
15,700
+15,300
| +3,825% | +$1.12M |
|
2549
Sharplink Inc
SBET
$2.09B
| $1.23M | ﹤0.01% |
256,153
-270,831
| -51% | -$1.73M |
|
2550
Manchester United
MANU
$3.52B
| $1.23M | ﹤0.01% |
53,574
+26,854
| +101% | +$532K |
|
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.