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 | |
|---|---|---|---|---|---|---|
1151
PUT
Becton Dickinson
BDX
$43B
| $8.34M | ﹤0.01% |
34,600
+16,800
| +94% | +$3.94M |
|
1152
CALL
Iris Energy
IREN
$14.1B
| $8.32M | ﹤0.01% |
986,000
+400,500
| +68% | +$3.68M |
|
1153
CALL
TE Connectivity
TEL
$58.6B
| $8.32M | ﹤0.01% |
55,100
-4,600
| -8% | -$689K |
|
1154
Boston Scientific
BSX
$66.2B
| $8.32M | ﹤0.01% |
99,260
+73,106
| +280% | +$5.76M |
|
1155
Chevron
CVX
$387B
| $8.27M | ﹤0.01% |
+56,165
| New | +$8.36M |
|
1156
PUT
PPG Industries
PPG
$26.1B
| $8.27M | ﹤0.01% |
62,400
+100
| +0.2% | +$12.6K |
|
|
GRMN
1157
CALL
Garmin
GRMN
$47.3B
| $8.24M | ﹤0.01% |
46,800
-11,800
| -20% | -$2.04M |
|
1158
Qualcomm
QCOM
$178B
| $8.23M | ﹤0.01% |
48,389
-125,600
| -72% | -$22.2M |
|
1159
Canadian Solar
CSIQ
$949M
| $8.21M | ﹤0.01% |
489,874
+186,487
| +61% | +$2.73M |
|
1160
CALL
Ingersoll Rand
IR
$33.3B
| $8.2M | ﹤0.01% |
83,500
+37,200
| +80% | +$3.46M |
|
1161
CALL
Clear Secure
YOU
$5.31B
| $8.2M | ﹤0.01% |
247,300
+93,400
| +61% | +$2.41M |
|
1162
Riot Platforms
RIOT
$8.84B
| $8.14M | ﹤0.01% |
1,097,648
+514,826
| +88% | +$4.46M |
|
1163
PUT
Crown Holdings
CCK
$12.7B
| $8.14M | ﹤0.01% |
84,900
+65,600
| +340% | +$5.65M |
|
1164
CALL
Paycom
PAYC
$6.73B
| $8.13M | ﹤0.01% |
48,800
+9,400
| +24% | +$1.5M |
|
1165
CALL
MasTec
MTZ
$27.6B
| $8.12M | ﹤0.01% |
66,000
+37,200
| +129% | +$4.06M |
|
1166
CALL
PennyMac Financial
PFSI
$4.43B
| $8.11M | ﹤0.01% |
71,200
+28,900
| +68% | +$2.96M |
|
1167
CALL
Old Dominion Freight Line
ODFL
$49.2B
| $8.08M | ﹤0.01% |
40,700
+15,500
| +62% | +$3.02M |
|
1168
CALL
Bunge Global
BG
$23.7B
| $8.08M | ﹤0.01% |
83,600
-1,800
| -2% | -$184K |
|
1169
PUT
AES
AES
$10.6B
| $8.05M | ﹤0.01% |
401,400
-306,500
| -43% | -$5.42M |
|
1170
CALL
Globe Life
GL
$13.4B
| $8.05M | ﹤0.01% |
76,000
-69,000
| -48% | -$6.62M |
|
1171
CALL
Parker-Hannifin
PH
$126B
| $8.02M | ﹤0.01% |
12,700
+2,200
| +21% | +$1.25M |
|
1172
PUT
Canadian Natural Resources
CNQ
$96.8B
| $8.02M | ﹤0.01% |
241,500
-37,000
| -13% | -$1.29M |
|
1173
Trane Technologies
TT
$107B
| $8.02M | ﹤0.01% |
20,631
+4,680
| +29% | +$1.62M |
|
1174
CALL
Maplebear
CART
$10.1B
| $8.02M | ﹤0.01% |
196,800
-44,600
| -18% | -$1.57M |
|
1175
PUT
Nutanix
NTNX
$14.5B
| $8M | ﹤0.01% |
135,100
+13,700
| +11% | +$753K |
|
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.