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 | |
|---|---|---|---|---|---|---|
|
OBE
4276
CALL
Obsidian Energy
OBE
$628M
| $258K | ﹤0.01% |
46,600
-2,600
| -5% | -$17.4K |
|
4277
Sonos
SONO
$2B
| $258K | ﹤0.01% |
21,012
+20,695
| +6,528% | +$263K |
|
4278
PUT
Virco
VIRC
$94.7M
| $258K | ﹤0.01% |
18,700
-13,800
| -42% | -$210K |
|
4279
CALL
Essential Utilities
WTRG
$11.5B
| $258K | ﹤0.01% |
6,700
-2,800
| -29% | -$110K |
|
4280
CALL
Galectin Therapeutics
GALT
$223M
| $257K | ﹤0.01% |
93,700
+88,400
| +1,668% | +$217K |
|
|
LNW
4281
DELISTED
Light & Wonder
LNW
| $257K | ﹤0.01% |
+2,835
| New | +$297K |
|
4282
HealthEquity
HQY
$8.46B
| $256K | ﹤0.01% |
+3,136
| New | +$242K |
|
4283
PUT
Vista Energy
VIST
$7.16B
| $256K | ﹤0.01% |
5,800
+1,400
| +32% | +$65.7K |
|
4284
Fiverr
FVRR
$417M
| $255K | ﹤0.01% |
9,888
-15,772
| -61% | -$382K |
|
|
INFA
4285
CALL
DELISTED
Informatica
INFA
| $255K | ﹤0.01% |
10,100
-35,200
| -78% | -$892K |
|
4286
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.73B
| $254K | ﹤0.01% |
+5,478
| New | +$247K |
|
4287
CALL
Delcath Systems
DCTH
$399M
| $254K | ﹤0.01% |
28,200
+600
| +2% | +$5.21K |
|
4288
CALL
Teradata
TDC
$2.75B
| $254K | ﹤0.01% |
8,400
-3,500
| -29% | -$104K |
|
4289
CALL
Exponent
EXPO
$3.15B
| $253K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$209K |
|
4290
CALL
Lamar Advertising Co
LAMR
$16.5B
| $253K | ﹤0.01% |
1,900
+200
| +12% | +$24.4K |
|
4291
CALL
LegalZoom.com
LZ
$1.39B
| $253K | ﹤0.01% |
39,900
-99,200
| -71% | -$649K |
|
4292
PUT
UFP Technologies
UFPT
$2B
| $253K | ﹤0.01% |
800
-1,300
| -62% | -$414K |
|
4293
PUT
Workiva
WK
$3.28B
| $253K | ﹤0.01% |
3,200
-7,200
| -69% | -$541K |
|
4294
PUT
Weyerhaeuser
WY
$17.7B
| $253K | ﹤0.01% |
7,500
-900
| -11% | -$27.7K |
|
4295
CALL
Adecoagro
AGRO
$1.45B
| $252K | ﹤0.01% |
22,800
-58,300
| -72% | -$610K |
|
4296
Byrna Technologies
BYRN
$90.1M
| $252K | ﹤0.01% |
14,892
+14,524
| +3,947% | +$172K |
|
4297
Evergy
EVRG
$19.7B
| $252K | ﹤0.01% |
4,070
-4,859
| -54% | -$283K |
|
4298
Arbutus Biopharma
ABUS
$871M
| $251K | ﹤0.01% |
65,294
-30,239
| -32% | -$116K |
|
|
HBI
4299
DELISTED
Hanesbrands
HBI
| $251K | ﹤0.01% |
34,238
-29,323
| -46% | -$175K |
|
4300
MarineMax
HZO
$782M
| $251K | ﹤0.01% |
7,131
-29,196
| -80% | -$952K |
|
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.