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 | |
|---|---|---|---|---|---|---|
1901
CALL
Perrigo
PRGO
$1.4B
| $3.08M | ﹤0.01% |
117,500
+34,900
| +42% | +$961K |
|
1902
PUT
California Resources
CRC
$4.75B
| $3.08M | ﹤0.01% |
58,700
-1,500
| -2% | -$75.9K |
|
|
CTRA
1903
PUT
DELISTED
Coterra Energy
CTRA
| $3.08M | ﹤0.01% |
128,600
-89,800
| -41% | -$2.22M |
|
1904
PUT
Elastic
ESTC
$6.1B
| $3.08M | ﹤0.01% |
40,100
-12,200
| -23% | -$1.2M |
|
1905
PUT
NexGen Energy
NXE
$6.05B
| $3.08M | ﹤0.01% |
471,200
-15,800
| -3% | -$98.1K |
|
1906
CALL
Planet Fitness
PLNT
$4.23B
| $3.06M | ﹤0.01% |
37,700
+26,200
| +228% | +$2.05M |
|
1907
PUT
Brinker International
EAT
$8.02B
| $3.05M | ﹤0.01% |
39,900
+4,500
| +13% | +$310K |
|
1908
CALL
Lithia Motors
LAD
$7.78B
| $3.05M | ﹤0.01% |
9,600
+5,900
| +159% | +$1.64M |
|
1909
CALL
Qiagen
QGEN
$8.53B
| $3.05M | ﹤0.01% |
65,042
+2,625
| +4% | +$120K |
|
1910
PUT
Equitable Holdings
EQH
$13.1B
| $3.05M | ﹤0.01% |
72,500
+33,800
| +87% | +$1.39M |
|
1911
PUT
W.P. Carey
WPC
$17.1B
| $3.04M | ﹤0.01% |
53,100
+12,900
| +32% | +$765K |
|
1912
Intuitive Machines
LUNR
$2.07B
| $3.04M | ﹤0.01% |
377,275
+350,119
| +1,289% | +$1.74M |
|
1913
CALL
Royalty Pharma
RPRX
$26.1B
| $3.03M | ﹤0.01% |
107,200
+1,000
| +0.9% | +$27.7K |
|
1914
CALL
StoneCo
STNE
$2.62B
| $3.03M | ﹤0.01% |
268,900
-9,000
| -3% | -$115K |
|
1915
CALL
Waters Corp
WAT
$36.8B
| $3.02M | ﹤0.01% |
8,400
+4,400
| +110% | +$1.43M |
|
1916
PUT
Oscar Health
OSCR
$8.5B
| $3.02M | ﹤0.01% |
142,200
-35,900
| -20% | -$647K |
|
|
APLS
1917
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $3.01M | ﹤0.01% |
104,500
+51,100
| +96% | +$1.89M |
|
1918
PUT
Aurora
AUR
$11.7B
| $3.01M | ﹤0.01% |
509,000
+403,800
| +384% | +$1.68M |
|
1919
CALL
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $3.01M | ﹤0.01% |
57,000
+52,300
| +1,113% | +$2.66M |
|
1920
PUT
Regal Rexnord
RRX
$14.2B
| $3M | ﹤0.01% |
18,100
+17,100
| +1,710% | +$2.64M |
|
1921
L3Harris
LHX
$55.9B
| $3M | ﹤0.01% |
12,605
+11,177
| +783% | +$2.58M |
|
1922
CALL
TransDigm Group
TDG
$69.2B
| $3M | ﹤0.01% |
2,100
+1,800
| +600% | +$2.34M |
|
1923
Cenovus Energy
CVE
$54.6B
| $2.99M | ﹤0.01% |
178,953
+47,464
| +36% | +$880K |
|
1924
PUT
Skywest
SKYW
$4.11B
| $2.99M | ﹤0.01% |
35,200
+31,200
| +780% | +$2.45M |
|
1925
PUT
Diageo
DEO
$46.2B
| $2.99M | ﹤0.01% |
21,300
-22,800
| -52% | -$2.96M |
|
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.