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 | |
|---|---|---|---|---|---|---|
2451
Chewy
CHWY
$7.34B
| $1.34M | ﹤0.01% |
68,109
+47,568
| +232% | +$1.08M |
|
2452
CALL
Corsair Gaming
CRSR
$1.48B
| $1.34M | ﹤0.01% |
138,400
+16,900
| +14% | +$131K |
|
2453
Ocular Therapeutix
OCUL
$2.12B
| $1.34M | ﹤0.01% |
136,256
+130,701
| +2,353% | +$1.18M |
|
2454
CALL
Hancock Whitney
HWC
$5.92B
| $1.34M | ﹤0.01% |
+17,900
| New | +$1.22M |
|
2455
CALL
BlackSky Technology
BKSY
$952M
| $1.34M | ﹤0.01% |
47,900
-7,900
| -14% | -$285K |
|
2456
PUT
OneMain Financial
OMF
$6.6B
| $1.34M | ﹤0.01% |
21,900
-44,000
| -67% | -$2.48M |
|
|
ARR
2457
CALL
Armour Residential REIT
ARR
$2B
| $1.33M | ﹤0.01% |
76,500
+43,700
| +133% | +$752K |
|
2458
Cintas
CTAS
$79.9B
| $1.33M | ﹤0.01% |
7,847
+7,520
| +2,300% | +$1.3M |
|
2459
CALL
Kinetik
KNTK
$4.12B
| $1.33M | ﹤0.01% |
27,600
+7,300
| +36% | +$349K |
|
2460
CALL
Payoneer
PAYO
$2.43B
| $1.33M | ﹤0.01% |
187,300
+168,900
| +918% | +$925K |
|
2461
PUT
NGL Energy Partners
NGL
$1.88B
| $1.33M | ﹤0.01% |
+83,700
| New | +$1.3M |
|
|
CGC
2462
CALL
Canopy Growth
CGC
$398M
| $1.33M | ﹤0.01% |
1,403,500
+32,100
| +2% | +$34.1K |
|
2463
CALL
ACM Research
ACMR
$5.38B
| $1.33M | ﹤0.01% |
10,500
-7,400
| -41% | -$523K |
|
2464
PUT
Fox Class B
FOX
$23.8B
| $1.33M | ﹤0.01% |
25,600
+10,900
| +74% | +$606K |
|
|
EQPT
2465
CALL
EquipmentShare.com Inc
EQPT
$4.4B
| $1.33M | ﹤0.01% |
67,700
+59,700
| +746% | +$1.28M |
|
2466
CALL
Watts Water Technologies
WTS
$11.9B
| $1.33M | ﹤0.01% |
3,400
+3,200
| +1,600% | +$998K |
|
2467
PUT
Burlington
BURL
$16B
| $1.33M | ﹤0.01% |
4,200
-500
| -11% | -$161K |
|
2468
Tencent Music
TME
$13.7B
| $1.33M | ﹤0.01% |
159,121
+78,210
| +97% | +$714K |
|
2469
CALL
Sable Offshore Corp
SOC
$744M
| $1.33M | ﹤0.01% |
430,900
-16,400
| -4% | -$209K |
|
2470
CALL
Iovance Biotherapeutics
IOVA
$4.98B
| $1.33M | ﹤0.01% |
319,000
-250,400
| -44% | -$951K |
|
2471
PUT
Chord Energy
CHRD
$7.45B
| $1.33M | ﹤0.01% |
11,600
+8,900
| +330% | +$1.21M |
|
2472
PUT
Kimco Realty
KIM
$15.1B
| $1.33M | ﹤0.01% |
52,300
+200
| +0.4% | +$4.8K |
|
2473
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$125M
| $1.32M | ﹤0.01% |
+59,942
| New | +$1.63M |
|
2474
CALL
UWM Holdings
UWMC
$420M
| $1.32M | ﹤0.01% |
578,000
-10,300
| -2% | -$32K |
|
2475
LG Display
LPL
$2.98B
| $1.32M | ﹤0.01% |
339,827
+38,131
| +13% | +$175K |
|
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.