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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $27.4B | 18.39% |
42,147,900
+893,700
| +2% | +$608M |
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $14.1B | 9.44% |
21,650,100
+2,216,500
| +11% | +$1.51B |
|
3
PUT
Invesco QQQ Trust
QQQ
$471B
| $6.49B | 4.36% |
11,252,400
-4,113,000
| -27% | -$2.5B |
|
|
4
CALL
Invesco QQQ Trust
QQQ
$471B
| $5.99B | 4.02% |
10,378,200
+839,600
| +9% | +$510M |
|
5
PUT
iShares S&P 100 ETF
OEF
$20.2B
| $5.11B | 3.43% |
34,218,500
+661,000
| +2% | +$222M |
|
|
6
CALL
iShares S&P 100 ETF
OEF
$20.2B
| $3.87B | 2.6% |
33,449,000
+7,313,200
| +28% | +$2.45B |
|
7
CALL
Tesla
TSLA
$1.42T
| $3.42B | 2.29% |
9,196,400
-2,494,600
| -21% | -$1.03B |
|
|
8
PUT
NVIDIA
NVDA
$5.02T
| $3.35B | 2.25% |
19,209,500
-7,149,700
| -27% | -$1.31B |
|
|
9
CALL
NVIDIA
NVDA
$5.02T
| $3.33B | 2.23% |
19,080,700
-9,605,500
| -33% | -$1.76B |
|
|
10
PUT
Tesla
TSLA
$1.42T
| $3.09B | 2.07% |
8,312,400
-4,530,300
| -35% | -$1.87B |
|
|
11
CALL
SPDR Gold Trust
GLD
$132B
| $2.36B | 1.58% |
5,490,500
-931,200
| -15% | -$417M |
|
|
12
CALL
Meta Platforms (Facebook)
META
$1.63T
| $2.35B | 1.58% |
4,109,700
-496,200
| -11% | -$318M |
|
|
13
CALL
Apple
AAPL
$4.81T
| $2.22B | 1.49% |
8,760,100
-525,800
| -6% | -$137M |
|
14
CALL
Alphabet (Google) Class A
GOOGL
$4.24T
| $2.07B | 1.39% |
7,197,200
-1,747,000
| -20% | -$549M |
|
|
15
PUT
SPDR Gold Trust
GLD
$132B
| $1.65B | 1.11% |
3,830,900
-320,700
| -8% | -$144M |
|
16
CALL
Microsoft
MSFT
$2.95T
| $1.55B | 1.04% |
4,178,400
+1,091,200
| +35% | +$457M |
|
|
17
PUT
Apple
AAPL
$4.81T
| $1.53B | 1.03% |
6,022,900
-1,723,000
| -22% | -$448M |
|
|
18
CALL
Amazon
AMZN
$2.66T
| $1.46B | 0.98% |
7,000,500
+1,139,800
| +19% | +$251M |
|
|
19
PUT
Alphabet (Google) Class A
GOOGL
$4.24T
| $1.45B | 0.97% |
5,053,100
-2,304,200
| -31% | -$724M |
|
|
20
PUT
Meta Platforms (Facebook)
META
$1.63T
| $1.43B | 0.96% |
2,501,500
+75,900
| +3% | +$48.6M |
|
21
CALL
iShares Silver Trust
SLV
$28.4B
| $1.36B | 0.91% |
19,990,100
+2,085,200
| +12% | +$158M |
|
22
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $1.02B | 0.69% |
15,375,700
-1,405,400
| -8% | -$70.5M |
|
|
23
PUT
Amazon
AMZN
$2.66T
| $914M | 0.61% |
4,388,700
+30,600
| +0.7% | +$6.74M |
|
|
24
PUT
Microsoft
MSFT
$2.95T
| $876M | 0.59% |
2,366,200
+122,800
| +5% | +$51.4M |
|
25
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $820M | 0.55% |
3,276,100
-1,459,800
| -31% | -$144M |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.