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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.68% |
| 3 | Consumer Discretionary | 0.23% |
| 4 | Healthcare | 0.19% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
1
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$814B
| $34.6B | 19.36% |
59,390,700
+2,249,600
| +4% | +$1.33B |
2015 Q1
39 quarters
|
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$814B
| $11.1B | 6.21% |
19,393,200
-6,303,900
| -25% | -$3.71B |
2015 Q1
39 quarters
|
|
3
PUT
iShares S&P 100 ETF
OEF
$20.3B
| $7.15B | 4% |
46,756,400
+3,585,400
| +8% | +$1.03B |
2014 Q4
40 quarters
|
|
4
CALL
Tesla
TSLA
$1.51T
| $5.91B | 3.31% |
14,645,500
+3,823,700
| +35% | +$1.23B |
2021 Q2
14 quarters
|
|
|
5
PUT
Tesla
TSLA
$1.51T
| $5.8B | 3.25% |
15,277,900
+6,012,100
| +65% | +$1.93B |
2021 Q2
14 quarters
|
|
6
PUT
Invesco QQQ Trust
QQQ
$478B
| $5.66B | 3.17% |
11,070,200
-3,513,700
| -24% | -$1.78B |
2021 Q2
14 quarters
|
|
|
7
CALL
NVIDIA
NVDA
$5.15T
| $5.17B | 2.89% |
40,042,400
-206,100
| -0.5% | -$28.4M |
2021 Q2
14 quarters
|
|
|
8
PUT
NVIDIA
NVDA
$5.15T
| $4.68B | 2.62% |
34,857,000
-5,258,900
| -13% | -$725M |
2021 Q2
14 quarters
|
|
|
9
CALL
iShares S&P 100 ETF
OEF
$20.3B
| $3.53B | 1.98% |
34,384,100
-1,392,500
| -4% | -$398M |
2014 Q4
40 quarters
|
|
|
10
CALL
Apple
AAPL
$5.04T
| $3.45B | 1.93% |
14,286,700
+1,959,500
| +16% | +$462M |
2015 Q1
39 quarters
|
|
|
11
PUT
Apple
AAPL
$5.04T
| $3.42B | 1.91% |
13,640,100
+5,188,100
| +61% | +$1.22B |
2015 Q1
39 quarters
|
|
|
12
CALL
Invesco QQQ Trust
QQQ
$478B
| $3.29B | 1.84% |
6,438,700
-3,154,100
| -33% | -$1.6B |
2021 Q2
14 quarters
|
|
13
CALL
Meta Platforms (Facebook)
META
$1.68T
| $1.88B | 1.05% |
3,213,600
+23,300
| +0.7% | +$13.7M |
2014 Q4
40 quarters
|
|
|
14
CALL
Microsoft
MSFT
$3.89T
| $1.45B | 0.81% |
3,430,200
+570,300
| +20% | +$243M |
2014 Q4
40 quarters
|
|
15
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.1B
| $1.37B | 0.77% |
37,858,600
-6,074,000
| -14% | -$281M |
2015 Q1
39 quarters
|
|
16
CALL
SPDR Gold Trust
GLD
$137B
| $1.3B | 0.73% |
5,367,600
-364,900
| -6% | -$89.7M |
2015 Q1
39 quarters
|
|
17
CALL
Alphabet (Google) Class A
GOOGL
$4T
| $1.29B | 0.72% |
6,799,900
-795,000
| -10% | -$139M |
2015 Q4
36 quarters
|
|
|
18
PUT
Strategy Inc
MSTR
$62.2B
| $1.27B | 0.71% |
4,485,800
+1,855,800
| +71% | +$558M |
2020 Q4
16 quarters
|
|
|
19
PUT
Meta Platforms (Facebook)
META
$1.68T
| $1.24B | 0.69% |
2,259,900
+22,900
| +1% | +$13.4M |
2014 Q4
40 quarters
|
|
20
PUT
Amazon
AMZN
$2.72T
| $1.21B | 0.68% |
5,499,200
+244,000
| +5% | +$49.9M |
2015 Q1
39 quarters
|
|
|
21
CALL
Amazon
AMZN
$2.72T
| $1.15B | 0.65% |
5,438,600
-81,100
| -1% | -$16.6M |
2015 Q1
39 quarters
|
|
|
22
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.1B
| $1.14B | 0.64% |
29,483,400
+5,755,200
| +24% | +$266M |
2015 Q1
39 quarters
|
|
|
23
CALL
Strategy Inc
MSTR
$62.2B
| $1.08B | 0.61% |
3,731,700
+805,800
| +28% | +$242M |
2020 Q4
16 quarters
|
|
|
24
PUT
Microsoft
MSFT
$3.89T
| $969M | 0.54% |
2,743,900
+741,300
| +37% | +$316M |
2014 Q4
40 quarters
|
|
|
25
PUT
Alphabet (Google) Class A
GOOGL
$4T
| $910M | 0.51% |
5,041,400
+14,600
| +0.3% | +$2.55M |
2015 Q4
36 quarters
|
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,521 new, 3,221 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
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 Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,521 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.