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 | |
|---|---|---|---|---|---|---|
6301
PUT
Rapid7
RPD
$741M
| $50.2K | ﹤0.01% |
6,200
+1,800
| +41% | +$11.9K |
|
|
GTY
6302
CALL
Getty Realty Corp
GTY
$2.01B
| $50K | ﹤0.01% |
1,500
-300
| -17% | -$9.95K |
|
|
GTY
6303
PUT
Getty Realty Corp
GTY
$2.01B
| $50K | ﹤0.01% |
1,500
+1,000
| +200% | +$33.2K |
|
6304
PUT
Kontoor Brands
KTB
$4.02B
| $50K | ﹤0.01% |
600
| – | – |
|
6305
PUT
Wave Life Sciences
WVE
$958M
| $50K | ﹤0.01% |
8,600
-79,600
| -90% | -$528K |
|
6306
AirSculpt Technologies
AIRS
$202M
| $49.9K | ﹤0.01% |
11,095
-73,383
| -87% | -$297K |
|
6307
PUT
Grocery Outlet
GO
$1.23B
| $49.9K | ﹤0.01% |
5,000
-11,800
| -70% | -$97.1K |
|
|
PROF
6308
CALL
Profound Medical
PROF
$252M
| $49.9K | ﹤0.01% |
7,500
| – | – |
|
6309
PUT
Krispy Kreme
DNUT
$586M
| $49.8K | ﹤0.01% |
14,100
-20,500
| -59% | -$73.2K |
|
6310
PUT
Coty
COTY
$2.58B
| $49.7K | ﹤0.01% |
23,000
-7,300
| -24% | -$15.7K |
|
6311
PUT
Nu Skin
NUS
$236M
| $49.6K | ﹤0.01% |
+9,400
| New | +$60.1K |
|
6312
PUT
Korea Electric Power
KEP
$15.3B
| $49.6K | ﹤0.01% |
4,100
+2,500
| +156% | +$34.5K |
|
6313
CALL
Genco Shipping & Trading
GNK
$1.21B
| $49.6K | ﹤0.01% |
2,000
| – | – |
|
6314
State Street SPDR MSCI USA Gender Diversity ETF
SHE
$334M
| $49.4K | ﹤0.01% |
+320
| New | +$47.1K |
|
6315
PUT
Metropolitan Bank Holding Corp
MCB
$1.16B
| $49.4K | ﹤0.01% |
+500
| New | +$45.3K |
|
6316
Zillow
ZG
$7.94B
| $49.4K | ﹤0.01% |
+1,574
| New | +$60.8K |
|
6317
PUT
Gran Tierra Energy
GTE
$357M
| $49.4K | ﹤0.01% |
7,900
+7,000
| +778% | +$57.2K |
|
6318
PUT
Lufax Holding
LU
$1.08B
| $49.2K | ﹤0.01% |
37,300
-17,500
| -32% | -$29.8K |
|
6319
PUT
Hafnia
HAFN
$4.61B
| $49.1K | ﹤0.01% |
7,400
-14,000
| -65% | -$113K |
|
|
CRMX
6320
Tradr 2X Long CRML Daily ETF
CRMX
$8.41M
| $49.1K | ﹤0.01% |
3,573
+3,252
| +1,013% | +$58.2K |
|
6321
CALL
Sprott Junior Gold Miners ETF
SGDJ
$377M
| $49K | ﹤0.01% |
700
-1,400
| -67% | -$123K |
|
6322
First Financial Corp
THFF
$944M
| $49K | ﹤0.01% |
+633
| New | +$43.7K |
|
6323
CALL
Westlake Chemical Partners
WLKP
$771M
| $49K | ﹤0.01% |
2,200
+600
| +38% | +$13.7K |
|
6324
loanDepot
LDI
$319M
| $49K | ﹤0.01% |
39,170
-13,960
| -26% | -$18.8K |
|
|
6325
PUT
loanDepot
LDI
$319M
| $48.9K | ﹤0.01% |
39,100
-1,600
| -4% | -$2.16K |
|
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.