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 | |
|---|---|---|---|---|---|---|
851
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $8.45M | 0.01% |
35,700
+400
| +1% | +$91.8K |
|
852
PUT
Novartis
NVS
$276B
| $8.45M | 0.01% |
53,900
-27,700
| -34% | -$4.15M |
|
853
PUT
VF Corp
VFC
$5.56B
| $8.43M | ﹤0.01% |
505,100
+81,400
| +19% | +$1.46M |
|
854
CALL
Regeneron Pharmaceuticals
REGN
$81.1B
| $8.42M | ﹤0.01% |
13,500
-3,000
| -18% | -$2.04M |
|
855
PUT
Wynn Resorts
WYNN
$8.35B
| $8.42M | ﹤0.01% |
86,700
+25,900
| +43% | +$2.67M |
|
856
CALL
Howmet Aerospace
HWM
$92.7B
| $8.42M | ﹤0.01% |
31,300
-19,900
| -39% | -$5.11M |
|
857
CALL
NextDecade
NEXT
$1.75B
| $8.39M | ﹤0.01% |
1,112,700
+240,700
| +28% | +$1.9M |
|
858
CALL
Eos Energy Enterprises
EOSE
$1.15B
| $8.39M | ﹤0.01% |
1,426,100
-631,500
| -31% | -$4.39M |
|
859
PUT
Phillips 66
PSX
$102B
| $8.38M | ﹤0.01% |
49,600
-1,500
| -3% | -$258K |
|
|
TYNS
860
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $8.37M | ﹤0.01% |
57,200
+21,000
| +58% | +$3.07M |
|
861
PUT
Lyft
LYFT
$5.63B
| $8.36M | ﹤0.01% |
572,400
-1,500
| -0.3% | -$21K |
|
862
PUT
Natera
NTRA
$59.5B
| $8.36M | ﹤0.01% |
30,800
+25,000
| +431% | +$5.33M |
|
863
CALL
DuPont de Nemours
DD
$17.8B
| $8.36M | ﹤0.01% |
66,900
+52,900
| +378% | +$7.51M |
|
864
Abbott
ABT
$175B
| $8.32M | ﹤0.01% |
+91,699
| New | +$8.37M |
|
865
CALL
Parker-Hannifin
PH
$123B
| $8.31M | ﹤0.01% |
8,500
-900
| -10% | -$824K |
|
866
CALL
GE HealthCare
GEHC
$30.1B
| $8.3M | ﹤0.01% |
129,700
+69,800
| +117% | +$4.59M |
|
867
CALL
VanEck Durable High Dividend ETF
DURA
$44.5M
| $8.28M | ﹤0.01% |
30,600
+8,100
| +36% | +$304K |
|
868
PUT
Hecla Mining
HL
$12.2B
| $8.26M | ﹤0.01% |
535,100
-185,300
| -26% | -$3.26M |
|
869
CALL
Ares Management
ARES
$27.8B
| $8.25M | ﹤0.01% |
74,100
-12,800
| -15% | -$1.54M |
|
|
KEEL
870
CALL
Keel Infrastructure Corp
KEEL
$2.35B
| $8.24M | ﹤0.01% |
1,436,400
+91,200
| +7% | +$392K |
|
871
PUT
AB InBev
BUD
$154B
| $8.23M | ﹤0.01% |
99,900
+7,600
| +8% | +$598K |
|
872
CALL
Plug Power
PLUG
$2.77B
| $8.23M | ﹤0.01% |
3,036,000
+361,000
| +13% | +$1.13M |
|
873
CALL
The Mosaic Company
MOS
$7.31B
| $8.22M | ﹤0.01% |
388,100
+40,500
| +12% | +$936K |
|
874
CALL
NRG Energy
NRG
$21.1B
| $8.22M | ﹤0.01% |
56,300
+32,600
| +138% | +$4.69M |
|
875
CALL
Yum! Brands
YUM
$37.8B
| $8.22M | ﹤0.01% |
51,400
+30,800
| +150% | +$4.77M |
|
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.