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 | |
|---|---|---|---|---|---|---|
1426
PUT
Symbotic
SYM
$5.11B
| $5.51M | ﹤0.01% |
226,100
+145,000
| +179% | +$3.94M |
|
1427
PUT
Cracker Barrel
CBRL
$1.2B
| $5.5M | ﹤0.01% |
121,400
+76,900
| +173% | +$3.17M |
|
1428
PUT
Welltower
WELL
$178B
| $5.5M | ﹤0.01% |
43,000
+28,700
| +201% | +$3.35M |
|
1429
PUT
Entegris
ENTG
$19.7B
| $5.48M | ﹤0.01% |
48,700
+33,500
| +220% | +$3.97M |
|
1430
PUT
Sherwin-Williams
SHW
$78.3B
| $5.46M | ﹤0.01% |
14,300
-3,900
| -21% | -$1.36M |
|
1431
CALL
Aspen Aerogels
ASPN
$387M
| $5.42M | ﹤0.01% |
195,900
-100,400
| -34% | -$2.51M |
|
1432
State Street Industrial Select Sector SPDR ETF
XLI
$33.9B
| $5.42M | ﹤0.01% |
40,044
+5,137
| +15% | +$653K |
|
1433
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $5.41M | ﹤0.01% |
31,400
+300
| +1% | +$50.4K |
|
1434
Shell
SHEL
$245B
| $5.41M | ﹤0.01% |
82,055
+71,912
| +709% | +$5.09M |
|
1435
PUT
Cenovus Energy
CVE
$54.6B
| $5.39M | ﹤0.01% |
322,300
-167,600
| -34% | -$3.11M |
|
1436
PUT
PVH
PVH
$3.71B
| $5.37M | ﹤0.01% |
53,300
-9,300
| -15% | -$925K |
|
1437
PUT
Logitech
LOGI
$15.2B
| $5.37M | ﹤0.01% |
59,800
-20,100
| -25% | -$1.79M |
|
1438
PUT
WIX.com
WIX
$2.15B
| $5.35M | ﹤0.01% |
32,000
-32,000
| -50% | -$5.15M |
|
1439
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $5.33M | ﹤0.01% |
727,700
+549,000
| +307% | +$3.4M |
|
1440
CALL
Gen Digital
GEN
$15.6B
| $5.32M | ﹤0.01% |
194,100
+10,400
| +6% | +$267K |
|
1441
PUT
Hasbro
HAS
$12.6B
| $5.32M | ﹤0.01% |
73,600
-34,200
| -32% | -$2.22M |
|
1442
PUT
Check Point Software Technologies
CHKP
$13.3B
| $5.32M | ﹤0.01% |
27,600
+13,700
| +99% | +$2.51M |
|
1443
PUT
Hubbell
HUBB
$25.7B
| $5.31M | ﹤0.01% |
12,400
+2,600
| +27% | +$999K |
|
1444
CALL
Casey's General Stores
CASY
$31.9B
| $5.3M | ﹤0.01% |
14,100
+9,200
| +188% | +$3.44M |
|
1445
PUT
PennyMac Financial
PFSI
$4.38B
| $5.29M | ﹤0.01% |
46,400
+39,200
| +544% | +$4.01M |
|
|
K
1446
PUT
DELISTED
Kellanova
K
| $5.29M | ﹤0.01% |
83,300
-58,300
| -41% | -$4.15M |
|
1447
PUT
Intuitive Machines
LUNR
$2.07B
| $5.29M | ﹤0.01% |
656,800
+612,500
| +1,383% | +$3.05M |
|
1448
PUT
Enovix
ENVX
$862M
| $5.28M | ﹤0.01% |
645,829
-364,342
| -36% | -$3.78M |
|
1449
PUT
Wheaton Precious Metals
WPM
$50.6B
| $5.28M | ﹤0.01% |
86,400
-18,300
| -17% | -$1.09M |
|
1450
PUT
American Eagle Outfitters
AEO
$2.85B
| $5.26M | ﹤0.01% |
235,100
+9,700
| +4% | +$200K |
|
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.