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 | |
|---|---|---|---|---|---|---|
1251
CALL
Warby Parker
WRBY
$3.3B
| $4.68M | ﹤0.01% |
154,300
+49,600
| +47% | +$1.23M |
|
|
PR
1252
CALL
Permian Resources
PR
$17.9B
| $4.68M | ﹤0.01% |
254,000
-63,100
| -20% | -$1.27M |
|
1253
CALL
PAR Technology
PAR
$582M
| $4.68M | ﹤0.01% |
268,400
+240,200
| +852% | +$3.47M |
|
1254
CALL
American International
AIG
$38.8B
| $4.67M | ﹤0.01% |
62,700
-18,900
| -23% | -$1.44M |
|
1255
PUT
BioNTech
BNTX
$24.7B
| $4.66M | ﹤0.01% |
50,200
+5,400
| +12% | +$508K |
|
1256
CALL
Monster Beverage
MNST
$84.5B
| $4.66M | ﹤0.01% |
97,000
-80,000
| -45% | -$3.36M |
|
1257
PUT
Cognizant
CTSH
$25.8B
| $4.66M | ﹤0.01% |
120,300
+95,400
| +383% | +$5.02M |
|
1258
PUT
Peabody Energy
BTU
$3.1B
| $4.66M | ﹤0.01% |
201,400
+600
| +0.3% | +$15.9K |
|
1259
CALL
Zevra Therapeutics
ZVRA
$656M
| $4.65M | ﹤0.01% |
324,500
+140,500
| +76% | +$1.56M |
|
1260
PUT
QuantumScape Corp
QS
$3.02B
| $4.63M | ﹤0.01% |
612,700
+98,400
| +19% | +$738K |
|
1261
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$96.8M
| $4.62M | ﹤0.01% |
104,100
-122,800
| -54% | -$11.6M |
|
1262
CALL
Sprouts Farmers Market
SFM
$5.83B
| $4.62M | ﹤0.01% |
54,600
+25,800
| +90% | +$2.09M |
|
1263
PUT
Unity
U
$18.3B
| $4.6M | ﹤0.01% |
161,100
-189,200
| -54% | -$5.03M |
|
1264
NIO
NIO
$8.97B
| $4.59M | ﹤0.01% |
+907,758
| New | +$5.29M |
|
1265
PUT
MSCI
MSCI
$40.1B
| $4.59M | ﹤0.01% |
8,200
+5,900
| +257% | +$3.44M |
|
1266
PUT
Intercontinental Exchange
ICE
$86.6B
| $4.59M | ﹤0.01% |
37,300
+27,300
| +273% | +$4.1M |
|
1267
PUT
Northrop Grumman
NOC
$72.5B
| $4.58M | ﹤0.01% |
9,000
+300
| +3% | +$173K |
|
1268
CALL
MakeMyTrip
MMYT
$4.4B
| $4.58M | ﹤0.01% |
86,000
-20,300
| -19% | -$924K |
|
1269
CALL
Ares Capital
ARCC
$13.8B
| $4.58M | ﹤0.01% |
247,200
-62,900
| -20% | -$1.17M |
|
1270
PUT
Redwire
RDW
$2.9B
| $4.57M | ﹤0.01% |
373,700
+7,200
| +2% | +$95K |
|
1271
PUT
Transocean
RIG
$6.01B
| $4.57M | ﹤0.01% |
934,000
+98,400
| +12% | +$615K |
|
1272
PUT
Hilton Worldwide
HLT
$70.7B
| $4.56M | ﹤0.01% |
13,800
+2,300
| +20% | +$756K |
|
1273
Canadian Pacific Kansas City
CP
$76.4B
| $4.56M | ﹤0.01% |
52,585
-39,433
| -43% | -$3.38M |
|
1274
CALL
HubSpot
HUBS
$10.7B
| $4.54M | ﹤0.01% |
24,900
+9,500
| +62% | +$1.99M |
|
1275
State Street Consumer Staples Select Sector SPDR ETF
XLP
$13.8B
| $4.54M | ﹤0.01% |
+54,600
| New | +$4.56M |
|
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.