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 | |
|---|---|---|---|---|---|---|
5351
CALL
Kodiak Gas Services
KGS
$5.92B
| $89K | ﹤0.01% |
3,100
-24,900
| -89% | -$685K |
|
5352
PUT
Odyssey Marine Exploration
OMEX
$34.9M
| $89K | ﹤0.01% |
108,600
+95,100
| +704% | +$357K |
|
|
TSE
5353
DELISTED
Trinseo
TSE
| $89K | ﹤0.01% |
17,521
+11,978
| +216% | +$39.9K |
|
|
ACRE
5354
CALL
Ares Commercial Real Estate
ACRE
$236M
| $88K | ﹤0.01% |
12,600
-3,100
| -20% | -$22.3K |
|
5355
CALL
Beam Global
BEEM
$23.3M
| $88K | ﹤0.01% |
18,000
-1,700
| -9% | -$9.3K |
|
|
BRDG
5356
CALL
DELISTED
Bridge Investment Group
BRDG
| $88K | ﹤0.01% |
9,000
+5,900
| +190% | +$48.2K |
|
5357
PUT
Corbus Pharmaceuticals
CRBP
$166M
| $88K | ﹤0.01% |
4,300
+1,600
| +59% | +$81.9K |
|
|
DCBO
5358
CALL
Docebo
DCBO
$525M
| $88K | ﹤0.01% |
2,000
-600
| -23% | -$24.6K |
|
5359
Eldorado Gold
EGO
$7.87B
| $88K | ﹤0.01% |
+5,103
| New | +$85.9K |
|
|
EU
5360
enCore Energy
EU
$212M
| $88K | ﹤0.01% |
22,029
+19,246
| +692% | +$71.3K |
|
|
GAMB
5361
CALL
DELISTED
Gambling.com
GAMB
| $88K | ﹤0.01% |
8,800
+1,200
| +16% | +$11.4K |
|
5362
CALL
Graphic Packaging
GPK
$3.17B
| $88K | ﹤0.01% |
3,000
-14,200
| -83% | -$404K |
|
5363
CALL
Horizon Technology Finance
HRZN
$295M
| $88K | ﹤0.01% |
8,300
-11,800
| -59% | -$135K |
|
5364
Lindsay Corp
LNN
$1.13B
| $88K | ﹤0.01% |
707
+265
| +60% | +$31.8K |
|
5365
PUT
Microvision
MVIS
$6.21M
| $88K | ﹤0.01% |
77,300
-2,700
| -3% | -$2.8K |
|
5366
PUT
Texas Pacific Land
TPL
$27.8B
| $88K | ﹤0.01% |
+300
| New | +$82.4K |
|
5367
CALL
Amphastar Pharmaceuticals
AMPH
$879M
| $87K | ﹤0.01% |
1,800
+1,100
| +157% | +$48.3K |
|
5368
PUT
Azenta
AZTA
$1.3B
| $87K | ﹤0.01% |
1,800
-200
| -10% | -$10.4K |
|
5369
Americold
COLD
$4.02B
| $87K | ﹤0.01% |
3,091
+2,985
| +2,816% | +$85.3K |
|
5370
PUT
Fresenius Medical Care
FMS
$13.8B
| $87K | ﹤0.01% |
4,100
+1,200
| +41% | +$23.6K |
|
5371
CALL
Graco
GGG
$12.9B
| $87K | ﹤0.01% |
+1,000
| New | +$82K |
|
|
MVO
5372
CALL
DELISTED
MV Oil Trust
MVO
| $87K | ﹤0.01% |
9,300
-100
| -1% | -$925 |
|
5373
CALL
NRX Pharmaceuticals
NRXP
$135M
| $87K | ﹤0.01% |
52,000
+47,900
| +1,168% | +$96.5K |
|
5374
CALL
Olema Pharmaceuticals
OLMA
$1B
| $87K | ﹤0.01% |
7,300
-5,000
| -41% | -$63.9K |
|
|
ACH
5375
PUT
Accendra Health
ACH
$237M
| $87K | ﹤0.01% |
5,600
-1,000
| -15% | -$15.1K |
|
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.