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 | |
|---|---|---|---|---|---|---|
5676
Navigator Holdings
NVGS
$1.37B
| $64K | ﹤0.01% |
4,524
+2,661
| +143% | +$35.8K |
|
|
IFLN
5677
Invesco Bloomberg Enhanced Fallen Angels ETF
IFLN
$308M
| $64K | ﹤0.01% |
+3,508
| New | +$63.5K |
|
|
HTT
5678
High Templar Tech Ltd
HTT
$379M
| $64K | ﹤0.01% |
20,465
-34,017
| -62% | -$94.4K |
|
5679
CALL
Alpha Architect US Quantitative Value ETF
QVAL
$587M
| $64K | ﹤0.01% |
1,700
-1,000
| -37% | -$42.5K |
|
5680
PUT
Simulations Plus
SLP
$370M
| $64K | ﹤0.01% |
+3,700
| New | +$104K |
|
|
GMEU
5681
T-REX 2X Long GME Daily Target ETF
GMEU
$21.2M
| $64K | ﹤0.01% |
+3,993
| New | +$95.3K |
|
|
JBS
5682
CALL
JBS N.V.
JBS
$47B
| $64K | ﹤0.01% |
+4,400
| New | +$61.9K |
|
|
AIV
5683
CALL
Aimco
AIV
$383M
| $63K | ﹤0.01% |
7,300
-72,800
| -91% | -$589K |
|
|
ARI
5684
CALL
Apollo Commercial Real Estate
ARI
$851M
| $63K | ﹤0.01% |
6,600
-9,800
| -60% | -$92.3K |
|
5685
Capital Group Dividend Value ETF
CGDV
$37.4B
| $63K | ﹤0.01% |
1,600
+1,370
| +596% | +$49.7K |
|
|
DHC
5686
PUT
Diversified Healthcare Trust
DHC
$2.17B
| $63K | ﹤0.01% |
17,600
+600
| +4% | +$1.73K |
|
5687
CALL
DNOW Inc
DNOW
$2.51B
| $63K | ﹤0.01% |
4,300
-2,100
| -33% | -$32.1K |
|
5688
Energizer
ENR
$1.44B
| $63K | ﹤0.01% |
3,136
+1,400
| +81% | +$33.6K |
|
5689
Huazhu Hotels Group
HTHT
$13B
| $63K | ﹤0.01% |
1,871
-7,245
| -79% | -$254K |
|
5690
Inter&Co
INTR
$2.49B
| $63K | ﹤0.01% |
8,541
+4,145
| +94% | +$27.5K |
|
5691
CALL
Kiniksa Pharmaceuticals
KNSA
$6.1B
| $63K | ﹤0.01% |
2,300
+1,200
| +109% | +$30.5K |
|
5692
Lincoln Educational Services
LINC
$1.33B
| $63K | ﹤0.01% |
+2,740
| New | +$55K |
|
5693
Comstock
LODE
$212M
| $63K | ﹤0.01% |
16,655
+2,663
| +19% | +$7.41K |
|
5694
PUT
POSCO
PKX
$16.5B
| $63K | ﹤0.01% |
1,300
+400
| +44% | +$18.4K |
|
5695
CALL
Sonic Automotive
SAH
$3.17B
| $63K | ﹤0.01% |
800
+400
| +100% | +$26.9K |
|
5696
CALL
Sabesp
SBS
$19.2B
| $63K | ﹤0.01% |
+14,954
| New | +$57.9K |
|
|
STKL
5697
CALL
DELISTED
SunOpta
STKL
| $63K | ﹤0.01% |
10,900
+6,200
| +132% | +$32.6K |
|
5698
CALL
Sun Communities
SUI
$15.3B
| $63K | ﹤0.01% |
500
+200
| +67% | +$24.8K |
|
5699
PUT
Tiptree Inc
TIPT
$655M
| $63K | ﹤0.01% |
2,700
+1,900
| +238% | +$42.4K |
|
5700
CALL
Victory Capital Holdings
VCTR
$6.16B
| $63K | ﹤0.01% |
+1,000
| New | +$60.2K |
|
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.