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 | |
|---|---|---|---|---|---|---|
|
SKYT
4726
CALL
DELISTED
SkyWater Technology
SKYT
| $198K | ﹤0.01% |
5,700
| – | – |
|
4727
Fortuna Silver Mines
FSM
$3.36B
| $198K | ﹤0.01% |
23,478
-42,004
| -64% | -$407K |
|
4728
PUT
Buckle
BKE
$2.23B
| $198K | ﹤0.01% |
4,700
+1,900
| +68% | +$94K |
|
|
VSNT
4729
CALL
Versant Media Group
VSNT
$4.48B
| $198K | ﹤0.01% |
5,500
-1,700
| -24% | -$68.3K |
|
4730
CALL
BlueLinx
BXC
$587M
| $198K | ﹤0.01% |
3,200
+700
| +28% | +$37.8K |
|
4731
Hamilton Insurance Group
HG
$3.29B
| $198K | ﹤0.01% |
5,830
+2,610
| +81% | +$81.8K |
|
4732
Global X Genomics & Biotechnology ETF
GNOM
$106M
| $198K | ﹤0.01% |
+3,477
| New | +$166K |
|
4733
CALL
Verisk Analytics
VRSK
$21.6B
| $197K | ﹤0.01% |
1,100
+200
| +22% | +$35.2K |
|
4734
CALL
LPL Financial
LPLA
$24.3B
| $197K | ﹤0.01% |
700
-900
| -56% | -$270K |
|
4735
CALL
SLM Corp
SLM
$4.3B
| $197K | ﹤0.01% |
7,600
-52,700
| -87% | -$1.19M |
|
4736
CALL
Annovis Bio
ANVS
$55.5M
| $197K | ﹤0.01% |
105,800
-20,000
| -16% | -$38.9K |
|
4737
2x Bitcoin ETF
BITX
$1.31B
| $197K | ﹤0.01% |
19,062
-157,315
| -89% | -$2.55M |
|
4738
Bumble
BMBL
$339M
| $197K | ﹤0.01% |
61,463
+36,550
| +147% | +$125K |
|
4739
CALL
Ternium
TX
$10.5B
| $196K | ﹤0.01% |
4,600
-3,500
| -43% | -$158K |
|
|
AARD
4740
PUT
Aardvark Therapeutics
AARD
$117M
| $196K | ﹤0.01% |
34,100
+24,000
| +238% | +$112K |
|
4741
CALL
Labcorp
LH
$25B
| $196K | ﹤0.01% |
+700
| New | +$184K |
|
|
4742
Verisk Analytics
VRSK
$21.6B
| $196K | ﹤0.01% |
1,091
-8,722
| -89% | -$1.54M |
|
4743
PUT
Verastem
VSTM
$717M
| $196K | ﹤0.01% |
51,200
+50,900
| +16,967% | +$246K |
|
4744
CALL
AudioCodes
AUDC
$256M
| $196K | ﹤0.01% |
+20,200
| New | +$184K |
|
|
ALOY
4745
REalloys Inc
ALOY
$555M
| $195K | ﹤0.01% |
+13,519
| New | +$154K |
|
4746
Invesco Senior Loan ETF
BKLN
$6.66B
| $195K | ﹤0.01% |
9,578
-122,706
| -93% | -$2.52M |
|
|
CNTB
4747
Connect Biopharma Holdings
CNTB
$62.5M
| $195K | ﹤0.01% |
+81,948
| New | +$199K |
|
4748
PUT
Denison Mines
DNN
$2.34B
| $195K | ﹤0.01% |
63,700
-61,300
| -49% | -$214K |
|
4749
PUT
Axos Financial
AX
$4.9B
| $195K | ﹤0.01% |
2,000
-2,300
| -53% | -$207K |
|
4750
CALL
Nexa Resources
NEXA
$1.64B
| $195K | ﹤0.01% |
+15,900
| New | +$221K |
|
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.