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 | |
|---|---|---|---|---|---|---|
1751
CALL
Cipher Digital
CIFR
$9.47B
| $3.64M | ﹤0.01% |
940,800
+298,800
| +47% | +$1.26M |
|
1752
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.63M | ﹤0.01% |
56,500
-42,100
| -43% | -$2.62M |
|
1753
CALL
Advanced Drainage Systems
WMS
$10.9B
| $3.63M | ﹤0.01% |
23,100
+15,900
| +221% | +$2.48M |
|
1754
PUT
H&R Block
HRB
$5.18B
| $3.63M | ﹤0.01% |
57,100
-51,500
| -47% | -$3.07M |
|
1755
CALL
OneMain Financial
OMF
$6.9B
| $3.62M | ﹤0.01% |
76,900
-7,500
| -9% | -$360K |
|
1756
PUT
Lear
LEA
$7.19B
| $3.61M | ﹤0.01% |
33,100
+22,800
| +221% | +$2.59M |
|
1757
PUT
Immatics
IMTX
$1.24B
| $3.61M | ﹤0.01% |
316,400
-2,000
| -0.6% | -$23.7K |
|
1758
CALL
Payoneer
PAYO
$2.41B
| $3.61M | ﹤0.01% |
479,400
-34,300
| -7% | -$223K |
|
1759
CALL
Everest Group
EG
$15.2B
| $3.6M | ﹤0.01% |
9,200
-1,700
| -16% | -$648K |
|
1760
PENN Entertainment
PENN
$2.74B
| $3.6M | ﹤0.01% |
191,012
-326,434
| -63% | -$6.22M |
|
1761
CALL
Ecolab
ECL
$75.6B
| $3.6M | ﹤0.01% |
14,100
-8,700
| -38% | -$2.13M |
|
1762
CALL
Valaris
VAL
$5.51B
| $3.6M | ﹤0.01% |
64,500
+23,900
| +59% | +$1.57M |
|
1763
PUT
Matador Resources
MTDR
$6.31B
| $3.59M | ﹤0.01% |
72,700
+13,000
| +22% | +$732K |
|
1764
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $3.59M | ﹤0.01% |
51,100
-105,700
| -67% | -$8.84M |
|
|
COOP
1765
PUT
DELISTED
Mr. Cooper
COOP
| $3.58M | ﹤0.01% |
38,900
+4,100
| +12% | +$363K |
|
1766
CALL
Procore
PCOR
$6.46B
| $3.58M | ﹤0.01% |
58,100
+34,000
| +141% | +$2.09M |
|
1767
CALL
Vornado Realty Trust
VNO
$7.47B
| $3.58M | ﹤0.01% |
91,000
-165,400
| -65% | -$5.32M |
|
1768
PUT
Fluor
FLR
$7.29B
| $3.58M | ﹤0.01% |
75,000
+1,100
| +1% | +$51.9K |
|
1769
PUT
Kornit Digital
KRNT
$706M
| $3.58M | ﹤0.01% |
138,500
+120,500
| +669% | +$2.22M |
|
1770
CALL
Western Midstream Partners
WES
$19.6B
| $3.58M | ﹤0.01% |
93,500
+26,900
| +40% | +$1.06M |
|
1771
Take-Two Interactive
TTWO
$43B
| $3.58M | ﹤0.01% |
+23,259
| New | +$3.53M |
|
1772
CALL
Bit Digital
BTBT
$484M
| $3.57M | ﹤0.01% |
1,016,800
+344,900
| +51% | +$1.15M |
|
1773
PUT
Corteva
CTVA
$59.7B
| $3.56M | ﹤0.01% |
60,600
-24,900
| -29% | -$1.36M |
|
1774
CALL
Copart
CPRT
$25.9B
| $3.55M | ﹤0.01% |
67,800
-3,800
| -5% | -$197K |
|
1775
PUT
New Fortress Energy
NFE
$101M
| $3.54M | ﹤0.01% |
390,000
+137,700
| +55% | +$2.12M |
|
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.