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 |
NVIDIA
NVDA
|
+$172M |
| 2 |
Apple
AAPL
|
+$156M |
| 3 |
Broadcom
AVGO
|
+$101M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$57.2M |
| 5 |
UnitedHealth
UNH
|
+$55.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$140M |
| 2 |
Amazon
AMZN
|
+$47.9M |
| 3 |
Netflix
NFLX
|
+$38.3M |
| 4 |
TSMC
TSM
|
+$37.3M |
| 5 |
Pfizer
PFE
|
+$36.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.74% |
| 2 | Communication Services | 0.19% |
| 3 | Consumer Discretionary | 0.18% |
| 4 | Healthcare | 0.17% |
| 5 | Financials | 0.14% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6751
Simplify Managed Futures Strategy ETF
CTA
$1.52B
| $20K | ﹤0.01% |
761
-1,608
| -68% | -$44.7K |
|
6752
ProShares Ultra Dow30
DDM
$548M
| $20K | ﹤0.01% |
+412
| New | +$18.1K |
|
6753
Definitive Healthcare
DH
$74.6M
| $20K | ﹤0.01% |
5,342
+2,954
| +124% | +$9.31K |
|
6754
Dole
DOLE
$1.35B
| $20K | ﹤0.01% |
1,458
-1,397
| -49% | -$19.8K |
|
6755
CALL
BlackRock US Equity Factor Rotation ETF
DYNF
$38B
| $20K | ﹤0.01% |
+700
| New | +$35.1K |
|
6756
Energy Recovery
ERII
$433M
| $20K | ﹤0.01% |
1,595
-7,106
| -82% | -$96.3K |
|
6757
PUT
Escalade
ESCA
$275M
| $20K | ﹤0.01% |
+1,500
| New | +$22.1K |
|
6758
Establishment Labs
ESTA
$2.7B
| $20K | ﹤0.01% |
+483
| New | +$16.8K |
|
6759
PUT
Eagle Materials
EXP
$6.86B
| $20K | ﹤0.01% |
100
-600
| -86% | -$129K |
|
6760
EyePoint Inc
EYPT
$1B
| $20K | ﹤0.01% |
2,144
+1,784
| +496% | +$12.3K |
|
6761
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$543M
| $20K | ﹤0.01% |
+317
| New | +$17.9K |
|
6762
Gilat Satellite Networks
GILT
$812M
| $20K | ﹤0.01% |
+2,929
| New | +$18.2K |
|
6763
CALL
Granite Ridge Resources
GRNT
$601M
| $20K | ﹤0.01% |
3,200
-900
| -22% | -$4.96K |
|
6764
InflaRx
IFRX
$249M
| $20K | ﹤0.01% |
+25,712
| New | +$30.4K |
|
6765
Inspire Medical Systems
INSP
$1.5B
| $20K | ﹤0.01% |
+160
| New | +$23.2K |
|
6766
CALL
Standard BioTools
LAB
$311M
| $20K | ﹤0.01% |
+17,100
| New | +$19K |
|
|
LOAN
6767
PUT
Manhattan Bridge Capital
LOAN
$47.7M
| $20K | ﹤0.01% |
+3,800
| New | +$19.8K |
|
6768
PUT
LegalZoom.com
LZ
$1.39B
| $20K | ﹤0.01% |
2,300
-26,300
| -92% | -$220K |
|
6769
PUT
MeiraGTx Holdings
MGTX
$1.09B
| $20K | ﹤0.01% |
3,100
-4,600
| -60% | -$27.2K |
|
|
MLGO
6770
PUT
MicroAlgo
MLGO
$45.2M
| $20K | ﹤0.01% |
877
+860
| +5,059% | +$141K |
|
|
NOA
6771
PUT
North American Construction
NOA
$370M
| $20K | ﹤0.01% |
+1,300
| New | +$21.2K |
|
|
NOTV
6772
CALL
DELISTED
Inotiv
NOTV
| $20K | ﹤0.01% |
11,300
-141,800
| -93% | -$308K |
|
6773
PUT
Pampa Energía
PAM
$4.56B
| $20K | ﹤0.01% |
+300
| New | +$22.5K |
|
6774
PUT
Pentair
PNR
$10.8B
| $20K | ﹤0.01% |
200
-5,400
| -96% | -$504K |
|
6775
PUT
Privia Health
PRVA
$3.13B
| $20K | ﹤0.01% |
900
-11,500
| -93% | -$266K |
|
Similar funds
Simplex Trading's Q2 2025 Portfolio in Review
As of Q2 2025, Simplex Trading held 10,048 positions worth $175B, up 12% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading withdrew a net $10.5B in Q2 2025, closing 1,431 positions and reducing 3,590 holdings. Its most notable exit was Constellation Energy, an estimated $35.8M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.74% of assets, up from 0.41% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in State Street SPDR S&P 500 ETF Trust worth $61.9M.
- Simplex Trading's largest Q2 2025 buy was State Street SPDR S&P 500 ETF Trust: 100,129 shares worth $61.9M.
- Simplex Trading added most to NVIDIA in Q2 2025, an estimated $172M increase.
- Simplex Trading's biggest Q2 2025 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $140M.
- Simplex Trading fully exited Constellation Energy in Q2 2025, selling an estimated $35.8M.
- Simplex Trading's ten largest holdings make up 47% of its $175B portfolio in Q2 2025.
- Simplex Trading opened 1,525 new positions and closed 1,431 in Q2 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $175B.
Based on Simplex Trading's 13F filing for Q2 2025, filed 5 Aug 2025.