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 | |
|---|---|---|---|---|---|---|
2951
AES
AES
$10.6B
| $860K | ﹤0.01% |
58,694
-123,722
| -68% | -$1.8M |
|
2952
SharkNinja
SN
$25.2B
| $860K | ﹤0.01% |
+5,648
| New | +$676K |
|
2953
Futu Holdings
FUTU
$15.7B
| $860K | ﹤0.01% |
+9,171
| New | +$1.17M |
|
2954
PUT
Skyward Specialty Insurance
SKWD
$2.4B
| $858K | ﹤0.01% |
14,700
| – | – |
|
2955
CALL
LKQ Corp
LKQ
$5.88B
| $856K | ﹤0.01% |
32,500
+21,700
| +201% | +$603K |
|
2956
Kodiak Gas Services
KGS
$5.32B
| $856K | ﹤0.01% |
11,387
-81,865
| -88% | -$5.57M |
|
2957
CALL
Grid Dynamics Holdings
GDYN
$619M
| $855K | ﹤0.01% |
150,600
+150,200
| +37,550% | +$929K |
|
2958
WidePoint Corp
WYY
$53M
| $853K | ﹤0.01% |
+48,765
| New | +$456K |
|
|
HIVE
2959
PUT
HIVE Digital Technologies
HIVE
$834M
| $853K | ﹤0.01% |
234,300
+168,500
| +256% | +$544K |
|
2960
Alpha Metallurgical Resources
AMR
$2.22B
| $852K | ﹤0.01% |
5,166
+4,511
| +689% | +$860K |
|
2961
CALL
Woodward
WWD
$19.3B
| $851K | ﹤0.01% |
2,000
+800
| +67% | +$303K |
|
|
PRSU
2962
CALL
Pursuit Attractions and Hospitality Inc
PRSU
$1.36B
| $851K | ﹤0.01% |
+15,200
| New | +$671K |
|
2963
PUT
Kosmos Energy
KOS
$1.61B
| $849K | ﹤0.01% |
402,600
-28,500
| -7% | -$79.3K |
|
2964
PUT
Dave & Buster's
PLAY
$224M
| $849K | ﹤0.01% |
74,500
+67,600
| +980% | +$805K |
|
2965
PUT
Evolv Technologies
EVLV
$851M
| $849K | ﹤0.01% |
146,300
-177,000
| -55% | -$1.11M |
|
2966
Hawaiian Electric Industries
HE
$1.54B
| $848K | ﹤0.01% |
62,708
-51,157
| -45% | -$729K |
|
2967
CALL
Liberty Global Class C
LBTYK
$3.14B
| $848K | ﹤0.01% |
76,000
+19,100
| +34% | +$221K |
|
2968
PUT
Golar LNG
GLNG
$5.01B
| $847K | ﹤0.01% |
17,000
-31,100
| -65% | -$1.64M |
|
2969
CALL
Kimbell Royalty Partners
KRP
$1.47B
| $846K | ﹤0.01% |
58,200
+55,100
| +1,777% | +$821K |
|
2970
Western Midstream Partners
WES
$18.6B
| $846K | ﹤0.01% |
19,324
-7,776
| -29% | -$335K |
|
2971
CALL
Rogers Communications
RCI
$17.1B
| $845K | ﹤0.01% |
26,000
+24,000
| +1,200% | +$866K |
|
|
DYNC
2972
PUT
Dynamix Corp
DYNC
$241M
| $845K | ﹤0.01% |
78,300
+35,500
| +83% | +$382K |
|
2973
CALL
ARK 21Shares Bitcoin ETF
ARKB
$3.16B
| $845K | ﹤0.01% |
43,400
+12,700
| +41% | +$302K |
|
|
ALMU
2974
CALL
Aeluma Inc
ALMU
$245M
| $843K | ﹤0.01% |
38,200
+20,400
| +115% | +$437K |
|
2975
Annaly Capital Management
NLY
$15.4B
| $843K | ﹤0.01% |
37,695
-113,596
| -75% | -$2.51M |
|
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.