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 | |
|---|---|---|---|---|---|---|
4651
CALL
Banc of California
BANC
$2.74B
| $210K | ﹤0.01% |
10,300
+3,300
| +47% | +$62.9K |
|
4652
CALL
iShares Core Dividend ETF
DIVB
$1.98B
| $210K | ﹤0.01% |
2,900
-1,000
| -26% | -$58.7K |
|
|
KYIV
4653
PUT
Kyivstar Group
KYIV
$2.95B
| $210K | ﹤0.01% |
13,000
+9,400
| +261% | +$123K |
|
|
SII
4654
Sprott
SII
$3.09B
| $210K | ﹤0.01% |
1,871
-3,489
| -65% | -$457K |
|
|
VIVO
4655
PUT
VivoPower PLC
VIVO
$118M
| $210K | ﹤0.01% |
+40,600
| New | +$168K |
|
4656
PUT
H.B. Fuller
FUL
$2.67B
| $210K | ﹤0.01% |
3,600
-16,800
| -82% | -$1.03M |
|
4657
PUT
CareTrust REIT
CTRE
$8.79B
| $210K | ﹤0.01% |
5,200
+4,900
| +1,633% | +$192K |
|
4658
PUT
Omega Healthcare
OHI
$14.1B
| $210K | ﹤0.01% |
4,400
-31,600
| -88% | -$1.46M |
|
4659
CALL
Petco
WOOF
$653M
| $209K | ﹤0.01% |
77,000
+1,800
| +2% | +$4.99K |
|
4660
Blackstone Secured Lending
BXSL
$5.74B
| $209K | ﹤0.01% |
8,833
-30,932
| -78% | -$739K |
|
4661
PUT
Simpson Manufacturing
SSD
$7.13B
| $209K | ﹤0.01% |
+1,000
| New | +$187K |
|
|
PTRN
4662
CALL
Pattern Group Inc
PTRN
$3B
| $209K | ﹤0.01% |
8,300
-3,700
| -31% | -$62.8K |
|
4663
PUT
Ceco Environmental
CECO
$4.14B
| $209K | ﹤0.01% |
2,300
+1,300
| +130% | +$103K |
|
|
ACR
4664
PUT
ACRES Commercial Realty
ACR
$158M
| $208K | ﹤0.01% |
11,700
+4,500
| +63% | +$88K |
|
|
TMHC
4665
PUT
DELISTED
Taylor Morrison
TMHC
| $208K | ﹤0.01% |
+2,900
| New | +$184K |
|
|
XOMA
4666
DELISTED
Xoma
XOMA
| $208K | ﹤0.01% |
+4,891
| New | +$198K |
|
4667
PUT
Perrigo
PRGO
$2.08B
| $208K | ﹤0.01% |
20,000
+14,200
| +245% | +$156K |
|
4668
Cogent Communications
CCOI
$376M
| $208K | ﹤0.01% |
14,966
-76,927
| -84% | -$1.42M |
|
4669
Editas Medicine
EDIT
$398M
| $207K | ﹤0.01% |
63,974
+57,993
| +970% | +$169K |
|
4670
CALL
Ambev
ABEV
$44.4B
| $207K | ﹤0.01% |
66,000
-15,700
| -19% | -$49.1K |
|
4671
CALL
Ameresco
AMRC
$1.12B
| $207K | ﹤0.01% |
7,500
+1,500
| +25% | +$43.4K |
|
4672
PUT
Titan Machinery
TITN
$553M
| $207K | ﹤0.01% |
+9,800
| New | +$201K |
|
|
AIRO
4673
CALL
AIRO Group Holdings
AIRO
$214M
| $207K | ﹤0.01% |
28,000
+7,800
| +39% | +$61.1K |
|
4674
CALL
Alpha Pro Tech
APT
$53.3M
| $207K | ﹤0.01% |
36,800
-2,100
| -5% | -$11K |
|
4675
CALL
Outlook Therapeutics
OTLK
$152M
| $207K | ﹤0.01% |
129,900
+115,900
| +828% | +$71.9K |
|
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.