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 | |
|---|---|---|---|---|---|---|
5501
CALL
Colliers International
CIGI
$5.04B
| $75K | ﹤0.01% |
500
| – | – |
|
5502
CALL
Gildan
GIL
$10.3B
| $75K | ﹤0.01% |
1,600
-4,700
| -75% | -$199K |
|
5503
Herbalife
HLF
$1.29B
| $75K | ﹤0.01% |
+10,451
| New | +$96.2K |
|
5504
Matsons
MATX
$6.13B
| $75K | ﹤0.01% |
+527
| New | +$69.3K |
|
|
MAXN
5505
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $75K | ﹤0.01% |
7,818
-16,223
| -67% | -$260K |
|
5506
CALL
Mercury Insurance
MCY
$5.93B
| $75K | ﹤0.01% |
1,200
-1,100
| -48% | -$65.4K |
|
5507
PUT
Maravai LifeSciences
MRVI
$969M
| $75K | ﹤0.01% |
9,100
-5,900
| -39% | -$51K |
|
5508
CALL
PLAYSTUDIOS Inc
MYPS
$77.9M
| $75K | ﹤0.01% |
49,900
+47,300
| +1,819% | +$83.3K |
|
|
YRD
5509
PUT
Yiren Digital
YRD
$97.1M
| $75K | ﹤0.01% |
13,300
+11,300
| +565% | +$52.6K |
|
|
VZIO
5510
DELISTED
VIZIO Holding Corp.
VZIO
| $75K | ﹤0.01% |
+6,728
| New | +$74.5K |
|
5511
CALL
ProFrac Holding
ACDC
$731M
| $74K | ﹤0.01% |
10,900
-21,900
| -67% | -$154K |
|
5512
PUT
Cellebrite
CLBT
$3.68B
| $74K | ﹤0.01% |
4,400
+3,900
| +780% | +$57.9K |
|
5513
PUT
Flotek Industries
FTK
$852M
| $74K | ﹤0.01% |
15,000
+13,300
| +782% | +$60.3K |
|
5514
CALL
Gladstone Capital
GLAD
$422M
| $74K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$69.9K |
|
|
ADAM
5515
CALL
Adamas Trust
ADAM
$815M
| $74K | ﹤0.01% |
11,700
+7,100
| +154% | +$45.7K |
|
5516
CALL
Odyssey Marine Exploration
OMEX
$34.9M
| $74K | ﹤0.01% |
89,800
+82,400
| +1,114% | +$309K |
|
5517
CALL
Smith Micro Software
SMSI
$14.5M
| $74K | ﹤0.01% |
14,540
+13,940
| +2,323% | +$98.3K |
|
5518
PUT
US Commodity Index
USCI
$369M
| $74K | ﹤0.01% |
1,200
| – | – |
|
5519
Viasat
VSAT
$10.6B
| $74K | ﹤0.01% |
6,232
-13,406
| -68% | -$216K |
|
5520
PUT
Webster Financial
WBS
$12.5B
| $74K | ﹤0.01% |
1,600
-44,100
| -96% | -$2.02M |
|
5521
PUT
World Kinect Corp
WKC
$2.04B
| $74K | ﹤0.01% |
2,400
| – | – |
|
|
IBTX
5522
PUT
DELISTED
Independent Bank Group, Inc.
IBTX
| $74K | ﹤0.01% |
1,300
| – | – |
|
5523
Direxion Daily AAPL Bull 2X ETF
AAPU
$161M
| $73K | ﹤0.01% |
1,942
-6,052
| -76% | -$217K |
|
5524
CALL
Atlas Lithium Corp
ATLX
$80.8M
| $73K | ﹤0.01% |
10,800
+1,900
| +21% | +$19.3K |
|
5525
PUT
Clean Energy Fuels
CLNE
$427M
| $73K | ﹤0.01% |
23,700
-25,500
| -52% | -$72.3K |
|
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.