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 | |
|---|---|---|---|---|---|---|
3026
CALL
TransUnion
TRU
$12.8B
| $801K | ﹤0.01% |
11,100
+9,800
| +754% | +$687K |
|
3027
CALL
O-I Glass
OI
$900M
| $800K | ﹤0.01% |
83,100
+72,800
| +707% | +$685K |
|
3028
CALL
Camtek
CAMT
$6.7B
| $799K | ﹤0.01% |
4,900
+4,500
| +1,125% | +$798K |
|
3029
CALL
Citizens Financial Group
CFG
$27.4B
| $799K | ﹤0.01% |
11,400
-48,500
| -81% | -$3.13M |
|
|
MRX
3030
CALL
Marex Group Limited Ordinary Shares
MRX
$5.19B
| $798K | ﹤0.01% |
13,100
+7,900
| +152% | +$435K |
|
3031
NeoGenomics
NEO
$2.49B
| $796K | ﹤0.01% |
54,589
+47,053
| +624% | +$454K |
|
3032
Skyworks Solutions
SWKS
$13.3B
| $796K | ﹤0.01% |
+11,738
| New | +$799K |
|
3033
CALL
Unum
UNM
$14.6B
| $796K | ﹤0.01% |
8,900
+7,600
| +585% | +$630K |
|
3034
Lloyds Banking Group
LYG
$82.9B
| $795K | ﹤0.01% |
136,385
+38,666
| +40% | +$210K |
|
3035
Avantis International Small Cap Value ETF
AVDV
$20.3B
| $795K | ﹤0.01% |
7,715
+2,120
| +38% | +$226K |
|
|
VTEL
3036
CALL
Vanguard Long-Term Tax-Exempt Bond ETF
VTEL
$348M
| $794K | ﹤0.01% |
15,700
-11,400
| -42% | -$1.18M |
|
3037
CALL
PBF Energy
PBF
$8.76B
| $792K | ﹤0.01% |
17,400
-73,000
| -81% | -$3.04M |
|
|
SVM
3038
PUT
Silvercorp Metals
SVM
$2.41B
| $792K | ﹤0.01% |
78,400
+16,800
| +27% | +$203K |
|
3039
Dycom Industries
DY
$8.19B
| $792K | ﹤0.01% |
+1,566
| New | +$684K |
|
3040
PUT
Bath & Body Works
BBWI
$3.27B
| $791K | ﹤0.01% |
34,200
+4,100
| +14% | +$78.4K |
|
3041
CALL
Kilroy Realty
KRC
$3.93B
| $791K | ﹤0.01% |
+21,100
| New | +$717K |
|
3042
CALL
Procept Biorobotics
PRCT
$981M
| $790K | ﹤0.01% |
35,000
+19,700
| +129% | +$493K |
|
3043
Clearway Energy Class C
CWEN
$6.02B
| $789K | ﹤0.01% |
23,087
-20,402
| -47% | -$790K |
|
3044
PUT
QuidelOrtho
QDEL
$755M
| $788K | ﹤0.01% |
45,000
+44,900
| +44,900% | +$593K |
|
|
BLSH
3045
CALL
Bullish
BLSH
$5.61B
| $787K | ﹤0.01% |
33,600
+17,200
| +105% | +$598K |
|
3046
ProPetro Holding
PUMP
$1.16B
| $787K | ﹤0.01% |
+54,889
| New | +$853K |
|
3047
iShares Global Clean Energy ETF
ICLN
$2.2B
| $786K | ﹤0.01% |
38,364
+34,304
| +845% | +$711K |
|
3048
NextNav
NN
$2.42B
| $785K | ﹤0.01% |
44,035
-2,549
| -5% | -$49.3K |
|
3049
HF Sinclair
DINO
$18.8B
| $785K | ﹤0.01% |
11,267
-13,920
| -55% | -$926K |
|
3050
CALL
Vanguard Total Bond Market
BND
$159B
| $784K | ﹤0.01% |
10,800
+1,300
| +14% | +$95.4K |
|
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.