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 | |
|---|---|---|---|---|---|---|
3226
Pool Corp
POOL
$5.94B
| $685K | ﹤0.01% |
3,187
+1,312
| +70% | +$262K |
|
3227
CALL
Satellogic
SATL
$930M
| $685K | ﹤0.01% |
119,700
-17,400
| -13% | -$127K |
|
3228
PUT
Open Text
OTEX
$5.38B
| $684K | ﹤0.01% |
30,900
+7,000
| +29% | +$159K |
|
3229
Innodata
INOD
$2.3B
| $684K | ﹤0.01% |
9,055
-18,778
| -67% | -$1.38M |
|
3230
UGI
UGI
$7.77B
| $684K | ﹤0.01% |
19,803
+15,688
| +381% | +$555K |
|
3231
CALL
Distribution Solutions Group
DSGR
$1.62B
| $684K | ﹤0.01% |
25,000
-100
| -0.4% | -$2.73K |
|
3232
PUT
Pilgrim's Pride
PPC
$6.7B
| $683K | ﹤0.01% |
24,300
+11,900
| +96% | +$366K |
|
3233
CALL
Curtiss-Wright
CW
$19.7B
| $682K | ﹤0.01% |
900
-1,100
| -55% | -$806K |
|
3234
PUT
Getty Images
GETY
$34.1M
| $682K | ﹤0.01% |
792,800
+790,400
| +32,933% | +$684K |
|
3235
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.43B
| $682K | ﹤0.01% |
9,000
-2,300
| -20% | -$116K |
|
3236
Methanex
MEOH
$4.63B
| $681K | ﹤0.01% |
+14,766
| New | +$870K |
|
3237
CALL
WillScot Mobile Mini Holdings
WSC
$3.24B
| $681K | ﹤0.01% |
23,600
-700
| -3% | -$16.9K |
|
3238
PUT
A2Z Smart Technologies
AZ
$235M
| $681K | ﹤0.01% |
117,000
+105,100
| +883% | +$717K |
|
3239
PUT
Sundial Growers
SNDL
$345M
| $681K | ﹤0.01% |
504,200
+15,300
| +3% | +$21.9K |
|
3240
PUT
Eton Pharmaceutcials
ETON
$1.69B
| $681K | ﹤0.01% |
18,800
-700
| -4% | -$20.5K |
|
|
GRMN
3241
Garmin
GRMN
$56.7B
| $681K | ﹤0.01% |
+2,865
| New | +$697K |
|
|
LINE
3242
Lineage Inc
LINE
$8.07B
| $679K | ﹤0.01% |
15,710
-9,266
| -37% | -$364K |
|
3243
CALL
Telephone and Data Systems
TDS
$4B
| $677K | ﹤0.01% |
18,300
+10,100
| +123% | +$426K |
|
3244
Global X Data Center & Digital Infrastructure ETF
DTCR
$2.04B
| $677K | ﹤0.01% |
22,299
+10,981
| +97% | +$324K |
|
3245
PUT
Black Hills Corp
BKH
$5.32B
| $677K | ﹤0.01% |
9,100
-1,700
| -16% | -$125K |
|
3246
ProShares Ultra Bloomberg Crude Oil
UCO
$424M
| $677K | ﹤0.01% |
20,537
+5,378
| +35% | +$231K |
|
3247
CALL
Arteris
AIP
$1.14B
| $675K | ﹤0.01% |
13,900
+7,600
| +121% | +$243K |
|
|
ETH
3248
CALL
Grayscale Ethereum Staking Mini ETF Shares
ETH
$2.25B
| $675K | ﹤0.01% |
44,900
-56,700
| -56% | -$1.11M |
|
3249
Seagate
STX
$210B
| $675K | ﹤0.01% |
699
-1,900
| -73% | -$1.45M |
|
3250
CALL
Evergy
EVRG
$18B
| $674K | ﹤0.01% |
7,800
+5,300
| +212% | +$439K |
|
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.