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 | |
|---|---|---|---|---|---|---|
|
RDNW
4351
RideNow Group
RDNW
$254M
| $238K | ﹤0.01% |
49,765
+46,481
| +1,415% | +$192K |
|
4352
TE Connectivity
TEL
$61B
| $238K | ﹤0.01% |
+1,579
| New | +$236K |
|
|
ALTR
4353
DELISTED
Altair Engineering Inc
ALTR
| $238K | ﹤0.01% |
2,492
+2,077
| +500% | +$189K |
|
4354
CALL
Global Partners
GLP
$1.68B
| $237K | ﹤0.01% |
5,100
+3,600
| +240% | +$153K |
|
4355
CALL
Prosperity Bancshares
PB
$8.88B
| $237K | ﹤0.01% |
3,300
+3,000
| +1,000% | +$210K |
|
4356
iShares 10-20 Year Treasury Bond ETF
TLH
$11.1B
| $237K | ﹤0.01% |
+2,171
| New | +$233K |
|
4357
PUT
Essex Property Trust
ESS
$19B
| $236K | ﹤0.01% |
800
-100
| -11% | -$29K |
|
4358
PUT
Flywire
FLYW
$2.03B
| $236K | ﹤0.01% |
14,400
-1,400
| -9% | -$24.5K |
|
4359
PUT
Leggett & Platt
LEG
$1.4B
| $236K | ﹤0.01% |
17,400
-8,200
| -32% | -$102K |
|
4360
CALL
Woodside Energy
WDS
$44.3B
| $236K | ﹤0.01% |
13,700
-1,800
| -12% | -$31.9K |
|
4361
CONMED
CNMD
$1.32B
| $235K | ﹤0.01% |
+3,279
| New | +$231K |
|
4362
iShare MSCI Eurozone ETF
EZU
$9.35B
| $235K | ﹤0.01% |
+4,514
| New | +$226K |
|
4363
PUT
GoodRx Holdings
GDRX
$1.06B
| $235K | ﹤0.01% |
33,900
-200
| -0.6% | -$1.57K |
|
4364
CALL
LSB Industries
LXU
$832M
| $235K | ﹤0.01% |
29,300
+22,900
| +358% | +$182K |
|
4365
PUT
Masco
MAS
$14.5B
| $235K | ﹤0.01% |
2,800
-400
| -13% | -$30.3K |
|
4366
PUT
Tenable Holdings
TENB
$3.52B
| $235K | ﹤0.01% |
5,800
-1,000
| -15% | -$41.7K |
|
|
PDCO
4367
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $235K | ﹤0.01% |
10,800
-4,500
| -29% | -$106K |
|
|
ITCI
4368
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $235K | ﹤0.01% |
3,220
-6,210
| -66% | -$467K |
|
4369
PUT
AGCO
AGCO
$8.44B
| $234K | ﹤0.01% |
2,400
+900
| +60% | +$83.9K |
|
4370
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.04B
| $234K | ﹤0.01% |
2,403
-2,968
| -55% | -$285K |
|
4371
Kodak
KODK
$808M
| $234K | ﹤0.01% |
49,736
-50,763
| -51% | -$264K |
|
4372
Real Brokerage
REAX
$360M
| $234K | ﹤0.01% |
42,332
+35,954
| +564% | +$204K |
|
4373
SIGA Technologies
SIGA
$237M
| $234K | ﹤0.01% |
34,797
-92,015
| -73% | -$803K |
|
4374
PUT
Alta Equipment Group
ALTG
$196M
| $233K | ﹤0.01% |
34,700
-123,400
| -78% | -$949K |
|
4375
CALL
AMN Healthcare
AMN
$1.35B
| $233K | ﹤0.01% |
5,500
-1,000
| -15% | -$52.4K |
|
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.