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
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.19% |
| 2 | Consumer Discretionary | 0.38% |
| 3 | Technology | 0.35% |
| 4 | Communication Services | 0.24% |
| 5 | Healthcare | 0.2% |
| 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
$815B
| $8.66B | 9.42% |
22,645,100
-4,166,600
| -16% | -$1.6B |
2015 Q1
31 quarters
|
|
|
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$815B
| $6.29B | 6.84% |
16,446,100
+613,000
| +4% | +$236M |
2015 Q1
31 quarters
|
|
3
PUT
iShares S&P 100 ETF
OEF
$20.3B
| $3.22B | 3.51% |
27,531,100
-2,804,800
| -9% | -$484M |
2014 Q4
32 quarters
|
|
|
4
PUT
Invesco QQQ Trust
QQQ
$475B
| $2.65B | 2.88% |
9,948,500
-1,956,100
| -16% | -$541M |
2021 Q2
6 quarters
|
|
|
5
CALL
Invesco QQQ Trust
QQQ
$475B
| $2.26B | 2.46% |
8,503,700
+482,900
| +6% | +$134M |
2021 Q2
6 quarters
|
|
6
CALL
Apple
AAPL
$5.08T
| $1.75B | 1.91% |
13,598,100
+1,003,700
| +8% | +$143M |
2015 Q1
31 quarters
|
|
|
7
CALL
iShares S&P 100 ETF
OEF
$20.3B
| $1.72B | 1.87% |
17,940,700
-1,715,000
| -9% | -$296M |
2014 Q4
32 quarters
|
|
8
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $1.61B | 1.75% |
43,237,400
+3,697,200
| +9% | +$142M |
2015 Q1
31 quarters
|
|
9
CALL
Tesla
TSLA
$1.48T
| $1.59B | 1.73% |
13,038,600
+5,604,300
| +75% | +$1.06B |
2021 Q2
6 quarters
|
|
|
10
CALL
Amazon
AMZN
$2.7T
| $1.59B | 1.73% |
18,931,500
+7,234,800
| +62% | +$715M |
2015 Q1
31 quarters
|
|
|
11
PUT
Tesla
TSLA
$1.48T
| $1.57B | 1.7% |
12,712,500
+2,594,900
| +26% | +$491M |
2021 Q2
6 quarters
|
|
|
12
PUT
Apple
AAPL
$5.08T
| $1.14B | 1.24% |
8,833,500
-2,971,300
| -25% | -$425M |
2015 Q1
31 quarters
|
|
|
13
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.18B
| $901M | 0.98% |
22,192,800
+448,200
| +2% | +$17.2M |
2015 Q1
31 quarters
|
|
|
14
CALL
Microsoft
MSFT
$3.87T
| $881M | 0.96% |
3,673,400
+475,100
| +15% | +$114M |
2014 Q4
32 quarters
|
|
|
15
CALL
Meta Platforms (Facebook)
META
$1.65T
| $859M | 0.93% |
7,135,700
+1,657,900
| +30% | +$195M |
2014 Q4
32 quarters
|
|
16
CALL
Alphabet (Google) Class A
GOOGL
$3.96T
| $840M | 0.91% |
9,504,100
+1,004,100
| +12% | +$95.4M |
2015 Q4
28 quarters
|
|
17
PUT
Netflix
NFLX
$279B
| $740M | 0.8% |
25,087,000
-235,000
| -0.9% | -$6.59M |
2014 Q4
32 quarters
|
|
|
18
CALL
SPDR Gold Trust
GLD
$136B
| $731M | 0.8% |
4,308,400
+111,100
| +3% | +$17.9M |
2015 Q1
31 quarters
|
|
|
19
PUT
Amazon
AMZN
$2.7T
| $710M | 0.77% |
8,930,700
-42,100
| -0.5% | -$4.16M |
2015 Q1
31 quarters
|
|
|
20
PUT
Microsoft
MSFT
$3.87T
| $676M | 0.74% |
2,820,600
-323,800
| -10% | -$77.7M |
2014 Q4
32 quarters
|
|
21
PUT
NVIDIA
NVDA
$5.13T
| $643M | 0.7% |
43,979,000
-801,000
| -2% | -$11.7M |
2021 Q2
6 quarters
|
|
|
22
CALL
Netflix
NFLX
$279B
| $625M | 0.68% |
21,202,000
+5,410,000
| +34% | +$152M |
2014 Q4
32 quarters
|
|
|
23
PUT
Alphabet (Google) Class A
GOOGL
$3.96T
| $552M | 0.6% |
6,236,600
-284,300
| -4% | -$27M |
2015 Q4
28 quarters
|
|
|
24
CALL
NVIDIA
NVDA
$5.13T
| $527M | 0.57% |
36,052,000
-2,918,000
| -7% | -$42.8M |
2021 Q2
6 quarters
|
|
25
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$45.7B
| $505M | 0.55% |
1,524,500
+658,500
| +76% | +$214M |
2015 Q1
31 quarters
|
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,218 new, 3,362 increased, 4,366 reduced and 1,943 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,218 new positions and closed 1,943 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.