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 | |
|---|---|---|---|---|---|---|
5476
CALL
Associated Banc-Corp
ASB
$5.83B
| $77K | ﹤0.01% |
3,600
-1,400
| -28% | -$30.4K |
|
5477
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$105M
| $77K | ﹤0.01% |
1,109
-2,344
| -68% | -$162K |
|
5478
ProShares Ether Strategy ETF
EETH
$54.1M
| $77K | ﹤0.01% |
1,478
-1,274
| -46% | -$72.9K |
|
|
GB
5479
CALL
DELISTED
Global Blue Group Holding
GB
| $77K | ﹤0.01% |
14,100
+1,000
| +8% | +$5.06K |
|
|
GMS
5480
DELISTED
GMS Inc
GMS
| $77K | ﹤0.01% |
+855
| New | +$75.6K |
|
5481
CALL
Malibu Boats
MBUU
$541M
| $77K | ﹤0.01% |
2,000
-1,800
| -47% | -$64.8K |
|
|
NVNO
5482
CALL
enVVeno Medical
NVNO
$7.08M
| $77K | ﹤0.01% |
660
-1,051
| -61% | -$193K |
|
5483
Patria Investments
PAX
$1.75B
| $77K | ﹤0.01% |
6,901
-121
| -2% | -$1.44K |
|
|
SOND
5484
PUT
DELISTED
Sonder
SOND
| $77K | ﹤0.01% |
16,500
+11,500
| +230% | +$50.8K |
|
|
BMTX
5485
DELISTED
BM Technologies, Inc.
BMTX
| $77K | ﹤0.01% |
+22,725
| New | +$64.7K |
|
5486
CALL
Aemetis
AMTX
$106M
| $76K | ﹤0.01% |
33,200
+2,900
| +10% | +$8.13K |
|
5487
PUT
Byrna Technologies
BYRN
$103M
| $76K | ﹤0.01% |
4,500
+2,000
| +80% | +$23.7K |
|
5488
Invesco DB Agriculture Fund
DBA
$1.23B
| $76K | ﹤0.01% |
2,943
-9,432
| -76% | -$231K |
|
5489
PUT
Immunic
IMUX
$190M
| $76K | ﹤0.01% |
4,640
+630
| +16% | +$8.97K |
|
5490
CALL
Magnachip Semiconductor
MX
$119M
| $76K | ﹤0.01% |
16,300
-2,800
| -15% | -$13.6K |
|
5491
PUT
National Grid
NGG
$80.4B
| $76K | ﹤0.01% |
1,167
+636
| +120% | +$39K |
|
5492
CALL
Scholastic
SCHL
$767M
| $76K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$70.2K |
|
5493
Workiva
WK
$3.36B
| $76K | ﹤0.01% |
969
-7,132
| -88% | -$535K |
|
|
OCEA
5494
CALL
DELISTED
Ocean Biomedical, Inc. Common Stock
OCEA
| $76K | ﹤0.01% |
78,200
-9,600
| -11% | -$10.3K |
|
|
GATO
5495
DELISTED
Gatos Silver, Inc.
GATO
| $76K | ﹤0.01% |
5,101
+444
| +10% | +$5.69K |
|
|
ACRE
5496
PUT
Ares Commercial Real Estate
ACRE
$236M
| $75K | ﹤0.01% |
10,800
-18,100
| -63% | -$130K |
|
5497
CALL
Acacia Research
ACTG
$428M
| $75K | ﹤0.01% |
16,100
-4,400
| -21% | -$21.7K |
|
5498
CALL
ADT
ADT
$5.58B
| $75K | ﹤0.01% |
10,400
-163,000
| -94% | -$1.2M |
|
5499
Allogene Therapeutics
ALLO
$649M
| $75K | ﹤0.01% |
+27,130
| New | +$72.3K |
|
5500
CALL
Aterian
ATER
$4.45M
| $75K | ﹤0.01% |
26,200
-500
| -2% | -$1.5K |
|
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.