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 | |
|---|---|---|---|---|---|---|
|
SHCO
5326
DELISTED
Soho House & Co
SHCO
| $91K | ﹤0.01% |
17,855
-7,817
| -30% | -$42.8K |
|
5327
CALL
Teekay
TK
$1.01B
| $91K | ﹤0.01% |
10,000
-13,200
| -57% | -$110K |
|
5328
PUT
Xometry
XMTR
$4.74B
| $91K | ﹤0.01% |
5,000
-3,100
| -38% | -$50.9K |
|
5329
PUT
XPEL
XPEL
$1.22B
| $91K | ﹤0.01% |
2,100
-17,100
| -89% | -$690K |
|
5330
CALL
AXT Inc
AXTI
$3.95B
| $90K | ﹤0.01% |
37,200
+13,000
| +54% | +$36.8K |
|
5331
Black Diamond Therapeutics
BDTX
$96.8M
| $90K | ﹤0.01% |
20,799
-235
| -1% | -$1.28K |
|
5332
PUT
Brighthouse Financial
BHF
$3.56B
| $90K | ﹤0.01% |
2,000
-5,500
| -73% | -$247K |
|
5333
Buckle
BKE
$2.25B
| $90K | ﹤0.01% |
2,063
-1,187
| -37% | -$48.7K |
|
5334
PUT
Dream Finders Homes
DFH
$1.16B
| $90K | ﹤0.01% |
2,500
+1,000
| +67% | +$30.7K |
|
5335
PUT
GeoPark
GPRK
$633M
| $90K | ﹤0.01% |
11,500
-600
| -5% | -$5.49K |
|
5336
CALL
IMAX
IMAX
$2.62B
| $90K | ﹤0.01% |
4,400
-3,900
| -47% | -$76.7K |
|
5337
PUT
Janux Therapeutics
JANX
$925M
| $90K | ﹤0.01% |
2,000
| – | – |
|
5338
CALL
MoonLake Immunotherapeutics
MLTX
$1.57B
| $90K | ﹤0.01% |
1,800
-3,400
| -65% | -$159K |
|
5339
PUT
LHA Market State Tactical Beta ETF
MSTB
$194M
| $90K | ﹤0.01% |
6,600
+4,100
| +164% | +$136K |
|
5340
Ocugen
OCGN
$416M
| $90K | ﹤0.01% |
90,963
-39,499
| -30% | -$54.2K |
|
5341
CALL
Porch Group
PRCH
$1.64B
| $90K | ﹤0.01% |
58,900
-8,700
| -13% | -$13.7K |
|
5342
PUT
Banco Santander
SAN
$201B
| $90K | ﹤0.01% |
17,700
-56,800
| -76% | -$273K |
|
|
SVM
5343
Silvercorp Metals
SVM
$2.07B
| $90K | ﹤0.01% |
20,645
-100,265
| -83% | -$372K |
|
5344
PUT
10x Genomics
TXG
$6B
| $90K | ﹤0.01% |
4,000
+900
| +29% | +$18.6K |
|
|
ZYXI
5345
DELISTED
Zynex
ZYXI
| $90K | ﹤0.01% |
11,130
+11,124
| +185,400% | +$93.8K |
|
|
DNMR
5346
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $90K | ﹤0.01% |
1,225
-30
| -2% | -$524 |
|
5347
PUT
AbCellera Biologics
ABCL
$1.74B
| $89K | ﹤0.01% |
34,300
+5,100
| +17% | +$14.1K |
|
5348
Aemetis
AMTX
$106M
| $89K | ﹤0.01% |
38,847
-9,535
| -20% | -$26.7K |
|
5349
CMS Energy
CMS
$22.6B
| $89K | ﹤0.01% |
1,273
+71
| +6% | +$4.66K |
|
5350
PUT
Erasca
ERAS
$6.3B
| $89K | ﹤0.01% |
32,800
| – | – |
|
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.