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 | |
|---|---|---|---|---|---|---|
1301
CALL
Cenovus Energy
CVE
$54.6B
| $6.59M | ﹤0.01% |
393,900
-63,500
| -14% | -$1.18M |
|
|
ECHO
1302
CALL
EchoStar
ECHO
$25.5B
| $6.59M | ﹤0.01% |
265,500
+85,000
| +47% | +$1.74M |
|
1303
CALL
YPF
YPF
$20.2B
| $6.58M | ﹤0.01% |
310,500
-12,300
| -4% | -$262K |
|
1304
CALL
Texas Roadhouse
TXRH
$12.7B
| $6.57M | ﹤0.01% |
37,200
-9,300
| -20% | -$1.57M |
|
1305
PUT
Calumet Specialty Products
CLMT
$3.63B
| $6.57M | ﹤0.01% |
368,600
-295,600
| -45% | -$4.74M |
|
1306
CALL
KBR
KBR
$4.68B
| $6.57M | ﹤0.01% |
100,800
-67,200
| -40% | -$4.37M |
|
1307
CALL
XPeng
XPEV
$11.8B
| $6.56M | ﹤0.01% |
538,800
-311,000
| -37% | -$2.58M |
|
1308
PUT
Avis
CAR
$5.63B
| $6.55M | ﹤0.01% |
74,800
-19,500
| -21% | -$1.76M |
|
1309
CALL
Signet Jewelers
SIG
$3.55B
| $6.55M | ﹤0.01% |
63,500
+14,000
| +28% | +$1.18M |
|
1310
CALL
Weibo
WB
$1.9B
| $6.54M | ﹤0.01% |
649,300
+368,000
| +131% | +$2.9M |
|
1311
CALL
Pan American Silver
PAAS
$18.6B
| $6.54M | ﹤0.01% |
314,300
-106,000
| -25% | -$2.23M |
|
|
BNY
1312
Bank of New York Mellon
BNY
$108B
| $6.54M | ﹤0.01% |
90,974
-64,557
| -42% | -$4.25M |
|
1313
Global X Uranium ETF
URA
$5.52B
| $6.53M | ﹤0.01% |
228,199
+143,101
| +168% | +$3.84M |
|
|
MASI
1314
PUT
DELISTED
Masimo
MASI
| $6.52M | ﹤0.01% |
48,900
+41,100
| +527% | +$4.77M |
|
|
CMA
1315
CALL
DELISTED
Comerica
CMA
| $6.52M | ﹤0.01% |
108,800
-238,500
| -69% | -$13.2M |
|
1316
CALL
Matador Resources
MTDR
$6.31B
| $6.48M | ﹤0.01% |
131,200
+40,700
| +45% | +$2.29M |
|
1317
CALL
STMicroelectronics
STM
$46B
| $6.47M | ﹤0.01% |
217,600
+88,700
| +69% | +$2.93M |
|
1318
First Solar
FSLR
$21.8B
| $6.47M | ﹤0.01% |
25,931
+16,482
| +174% | +$3.71M |
|
1319
CALL
Citizens Financial Group
CFG
$30.4B
| $6.44M | ﹤0.01% |
156,800
+2,000
| +1% | +$80.8K |
|
1320
CALL
Corteva
CTVA
$59.7B
| $6.44M | ﹤0.01% |
109,500
-99,000
| -47% | -$5.41M |
|
1321
PUT
Enterprise Products Partners
EPD
$83.8B
| $6.43M | ﹤0.01% |
220,900
-57,100
| -21% | -$1.67M |
|
1322
PUT
Lattice Semiconductor
LSCC
$17.6B
| $6.43M | ﹤0.01% |
121,100
-3,300
| -3% | -$169K |
|
1323
Transocean
RIG
$5.92B
| $6.42M | ﹤0.01% |
1,510,967
+421,470
| +39% | +$2.08M |
|
1324
PUT
Teradyne
TER
$54.8B
| $6.42M | ﹤0.01% |
47,900
-5,800
| -11% | -$782K |
|
1325
CALL
SAP
SAP
$187B
| $6.41M | ﹤0.01% |
28,000
-5,800
| -17% | -$1.23M |
|
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.