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 | |
|---|---|---|---|---|---|---|
5301
CALL
SPX Corp
SPXC
$9.84B
| $123K | ﹤0.01% |
500
-300
| -38% | -$65.6K |
|
5302
CALL
United States 12 Month Oil Fund,
USL
$45.5M
| $122K | ﹤0.01% |
+2,700
| New | +$138K |
|
5303
PUT
Bank of Hawaii
BOH
$3.05B
| $122K | ﹤0.01% |
1,500
-100
| -6% | -$7.83K |
|
5304
CALL
National Health Investors
NHI
$3.48B
| $122K | ﹤0.01% |
1,600
+1,000
| +167% | +$76.6K |
|
5305
PUT
Healthpeak Properties
DOC
$14.2B
| $122K | ﹤0.01% |
5,700
+4,400
| +338% | +$82.1K |
|
5306
CALL
California Resources
CRC
$4.82B
| $122K | ﹤0.01% |
2,300
+700
| +44% | +$43.1K |
|
|
PS
5307
CALL
Pershing Square
PS
$15.6B
| $122K | ﹤0.01% |
+3,700
| New | +$135K |
|
|
YALA
5308
CALL
Yalla Group
YALA
$832M
| $121K | ﹤0.01% |
22,100
+20,000
| +952% | +$124K |
|
5309
PUT
iShares Core Dividend ETF
DIVB
$2.04B
| $121K | ﹤0.01% |
1,800
+800
| +80% | +$47K |
|
5310
PUT
Sky Harbour Group
SKYH
$415M
| $121K | ﹤0.01% |
12,300
-1,400
| -10% | -$13.7K |
|
5311
PUT
Trinity Industries
TRN
$2.26B
| $121K | ﹤0.01% |
3,500
-100
| -3% | -$3.38K |
|
5312
CALL
Oramed Pharmaceuticals
ORMP
$208M
| $121K | ﹤0.01% |
25,100
+25,000
| +25,000% | +$99.5K |
|
5313
Sidus Space
SIDU
$210M
| $120K | ﹤0.01% |
+42,793
| New | +$164K |
|
5314
ABM Industries
ABM
$2.76B
| $120K | ﹤0.01% |
2,717
+2,176
| +402% | +$89.2K |
|
5315
PUT
Compañía de Minas Buenaventura
BVN
$8.61B
| $120K | ﹤0.01% |
4,100
+300
| +8% | +$10.2K |
|
5316
PUT
KULR Technology Group
KULR
$118M
| $120K | ﹤0.01% |
31,500
+2,300
| +8% | +$7.66K |
|
|
ORC
5317
CALL
Orchid Island Capital
ORC
$1.3B
| $120K | ﹤0.01% |
17,200
+11,500
| +202% | +$79.3K |
|
5318
PUT
Axalta
AXTA
$7.66B
| $120K | ﹤0.01% |
3,500
+3,400
| +3,400% | +$102K |
|
5319
PUT
ADMA Biologics
ADMA
$2.15B
| $120K | ﹤0.01% |
14,300
-80,700
| -85% | -$736K |
|
5320
CALL
Equillium
EQ
$140M
| $120K | ﹤0.01% |
37,400
-177,100
| -83% | -$424K |
|
|
SARO
5321
CALL
StandardAero Inc
SARO
$8.21B
| $120K | ﹤0.01% |
4,000
+1,600
| +67% | +$42.1K |
|
5322
PUT
IMAX
IMAX
$2.83B
| $120K | ﹤0.01% |
+3,000
| New | +$115K |
|
|
FJET
5323
PUT
Starfighters Space Inc
FJET
$154M
| $119K | ﹤0.01% |
22,400
+19,600
| +700% | +$117K |
|
5324
CALL
Tactile Systems Technology
TCMD
$495M
| $119K | ﹤0.01% |
4,000
-20,500
| -84% | -$515K |
|
5325
CALL
Regal Rexnord
RRX
$10.8B
| $119K | ﹤0.01% |
500
+400
| +400% | +$83.6K |
|
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.