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 | |
|---|---|---|---|---|---|---|
6326
PUT
Merchants Bancorp
MBIN
$2.49B
| $31K | ﹤0.01% |
700
+100
| +17% | +$4.44K |
|
|
MGIC
6327
PUT
DELISTED
Magic Software Enterprises
MGIC
| $31K | ﹤0.01% |
2,700
-28,800
| -91% | -$313K |
|
6328
PUT
Morningstar
MORN
$7.55B
| $31K | ﹤0.01% |
100
| – | – |
|
6329
CALL
NerdWallet
NRDS
$632M
| $31K | ﹤0.01% |
2,500
-500
| -17% | -$6.62K |
|
|
OGI
6330
Organigram Holdings
OGI
$131M
| $31K | ﹤0.01% |
17,617
+3,842
| +28% | +$6.69K |
|
6331
ONE Gas
OGS
$5.01B
| $31K | ﹤0.01% |
421
-14
| -3% | -$963 |
|
|
HTT
6332
High Templar Tech Ltd
HTT
$370M
| $31K | ﹤0.01% |
14,571
+12,373
| +563% | +$22.9K |
|
6333
PUT
Regenxbio
RGNX
$616M
| $31K | ﹤0.01% |
3,000
-5,700
| -66% | -$69.5K |
|
6334
PUT
Sasol
SSL
$7.4B
| $31K | ﹤0.01% |
4,700
+4,300
| +1,075% | +$31.9K |
|
|
UDMY
6335
PUT
DELISTED
Udemy
UDMY
| $31K | ﹤0.01% |
4,300
-600
| -12% | -$4.84K |
|
6336
CALL
US Commodity Index
USCI
$370M
| $31K | ﹤0.01% |
500
+300
| +150% | +$18.3K |
|
|
CMBT
6337
CALL
CMB.TECH NV
CMBT
$4.52B
| $31K | ﹤0.01% |
1,900
+1,200
| +171% | +$19.7K |
|
|
EGRX
6338
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $31K | ﹤0.01% |
+8,355
| New | +$39.9K |
|
6339
CALL
Acumen Pharmaceuticals
ABOS
$152M
| $30K | ﹤0.01% |
12,300
+3,400
| +38% | +$9.22K |
|
6340
PUT
Atlas Energy Solutions
AESI
$1.27B
| $30K | ﹤0.01% |
1,400
-16,500
| -92% | -$341K |
|
6341
AirSculpt Technologies
AIRS
$308M
| $30K | ﹤0.01% |
+5,981
| New | +$26K |
|
6342
PUT
ALX Oncology
ALXO
$262M
| $30K | ﹤0.01% |
16,700
+11,900
| +248% | +$44.2K |
|
6343
CALL
Ameresco
AMRC
$980M
| $30K | ﹤0.01% |
800
-7,000
| -90% | -$216K |
|
|
6344
Ameresco
AMRC
$980M
| $30K | ﹤0.01% |
808
+40
| +5% | +$1.24K |
|
|
BPT
6345
CALL
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $30K | ﹤0.01% |
28,200
+14,200
| +101% | +$24.3K |
|
6346
Xtrackers Semiconductor Select Equity ETF
CHPS
$90.6M
| $30K | ﹤0.01% |
+936
| New | +$30.8K |
|
6347
Enovix
ENVX
$803M
| $30K | ﹤0.01% |
+3,792
| New | +$39.4K |
|
6348
Fidelity MSCI Consumer Staples Index ETF
FSTA
$1.45B
| $30K | ﹤0.01% |
+600
| New | +$29.7K |
|
6349
CALL
Getty Images
GETY
$159M
| $30K | ﹤0.01% |
8,000
+1,100
| +16% | +$3.88K |
|
6350
Hanmi Financial
HAFC
$935M
| $30K | ﹤0.01% |
1,622
-1,350
| -45% | -$25.3K |
|
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.