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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
CALL
Costco
COST
$412B
| $323M | 0.19% |
364,800
-13,000
| -3% | -$11.3M |
|
|
52
CALL
Citigroup
C
$223B
| $317M | 0.19% |
5,960,300
+656,900
| +12% | +$40.6M |
|
53
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $310M | 0.18% |
733,400
-140,400
| -16% | -$57M |
|
54
PUT
Super Micro Computer
SMCI
$16.5B
| $301M | 0.18% |
7,309,000
+2,927,000
| +67% | +$178M |
|
55
PUT
Micron Technology
MU
$1.1T
| $299M | 0.18% |
2,882,400
+675,700
| +31% | +$70.7M |
|
|
56
CALL
Super Micro Computer
SMCI
$16.5B
| $296M | 0.17% |
7,119,000
+3,859,000
| +118% | +$235M |
|
57
PUT
Eli Lilly
LLY
$1.05T
| $292M | 0.17% |
329,700
-81,600
| -20% | -$73.4M |
|
58
CALL
JPMorgan Chase
JPM
$918B
| $288M | 0.17% |
1,364,500
-294,800
| -18% | -$62.1M |
|
59
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $283M | 0.17% |
613,800
+140,200
| +30% | +$62M |
|
60
CALL
CrowdStrike
CRWD
$195B
| $281M | 0.16% |
4,006,800
+2,680,800
| +202% | +$190M |
|
|
61
PUT
JPMorgan Chase
JPM
$918B
| $275M | 0.16% |
1,304,100
-10,300
| -0.8% | -$2.17M |
|
62
CALL
Palantir
PLTR
$318B
| $272M | 0.16% |
7,312,200
+1,650,600
| +29% | +$50.7M |
|
63
PUT
Oracle
ORCL
$366B
| $271M | 0.16% |
1,593,000
+761,300
| +92% | +$110M |
|
64
PUT
Palo Alto Networks
PANW
$279B
| $271M | 0.16% |
1,588,200
+44,000
| +3% | +$7.41M |
|
|
65
PUT
CrowdStrike
CRWD
$195B
| $263M | 0.15% |
3,909,200
+1,872,000
| +92% | +$133M |
|
|
66
CALL
Oracle
ORCL
$366B
| $261M | 0.15% |
1,531,700
+351,400
| +30% | +$50.9M |
|
|
KFYP
67
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $258M | 0.15% |
7,594,400
+4,628,600
| +156% | +$157M |
|
68
PUT
Goldman Sachs
GS
$320B
| $249M | 0.15% |
503,500
-2,700
| -0.5% | -$1.32M |
|
|
69
CALL
Boeing
BA
$161B
| $249M | 0.15% |
1,635,700
-147,900
| -8% | -$25.4M |
|
|
70
PUT
Boeing
BA
$161B
| $242M | 0.14% |
1,593,200
+15,300
| +1% | +$2.62M |
|
|
71
CALL
Eli Lilly
LLY
$1.05T
| $241M | 0.14% |
272,400
-66,000
| -20% | -$59.3M |
|
72
CALL
ExxonMobil
XOM
$629B
| $237M | 0.14% |
2,080,500
-280,300
| -12% | -$32.4M |
|
73
CALL
PayPal
PYPL
$49.3B
| $233M | 0.14% |
3,330,300
-1,006,800
| -23% | -$67.3M |
|
74
PUT
Walmart Inc
WMT
$878B
| $233M | 0.14% |
3,081,100
+338,500
| +12% | +$24.9M |
|
75
CALL
Coinbase
COIN
$46.3B
| $230M | 0.13% |
1,290,100
+408,800
| +46% | +$81.9M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.