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 | |
|---|---|---|---|---|---|---|
6901
CALL
Old Second Bancorp
OSBC
$1.29B
| $15K | ﹤0.01% |
+1,000
| New | +$16.1K |
|
6902
PUT
Puma Biotechnology
PBYI
$398M
| $15K | ﹤0.01% |
6,200
-1,100
| -15% | -$3.33K |
|
6903
Simplify Interest Rate Hedge ETF
PFIX
$173M
| $15K | ﹤0.01% |
387
-493
| -56% | -$21.4K |
|
6904
Playboy Inc
PLBY
$136M
| $15K | ﹤0.01% |
19,911
+4,603
| +30% | +$3.29K |
|
6905
CALL
QuickLogic
QUIK
$211M
| $15K | ﹤0.01% |
2,000
-2,000
| -50% | -$18.4K |
|
6906
Recon Technology
RCON
$32.2M
| $15K | ﹤0.01% |
+5,346
| New | +$11.9K |
|
6907
CALL
Reynolds Consumer Products
REYN
$5.42B
| $15K | ﹤0.01% |
+500
| New | +$14.8K |
|
6908
CALL
RLI Corp
RLI
$6.02B
| $15K | ﹤0.01% |
+200
| New | +$14.8K |
|
6909
PUT
The RMR Group
RMR
$335M
| $15K | ﹤0.01% |
600
-2,600
| -81% | -$64.2K |
|
6910
iShares MSCI Global Silver and Metals Miners ETF
SLVP
$768M
| $15K | ﹤0.01% |
+1,204
| New | +$15.2K |
|
6911
Xtrackers S&P 500 ESG ETF
SNPE
$2.54B
| $15K | ﹤0.01% |
300
+200
| +200% | +$10.2K |
|
6912
PUT
SunCoke Energy
SXC
$794M
| $15K | ﹤0.01% |
1,800
+500
| +38% | +$4.63K |
|
6913
CALL
Synaptics
SYNA
$4.05B
| $15K | ﹤0.01% |
200
-1,900
| -90% | -$152K |
|
6914
CALL
Telecom Argentina
TEO
$5.84B
| $15K | ﹤0.01% |
2,100
| – | – |
|
6915
Treace Medical Concepts
TMCI
$262M
| $15K | ﹤0.01% |
2,659
-33,821
| -93% | -$217K |
|
6916
Tradr TSLA Bear Daily ETF
TSLQ
$156M
| $15K | ﹤0.01% |
47
-39
| -45% | -$19.2K |
|
6917
Valens Semiconductor
VLN
$160M
| $15K | ﹤0.01% |
7,000
+910
| +15% | +$2.16K |
|
|
VMEO
6918
CALL
DELISTED
Vimeo
VMEO
| $15K | ﹤0.01% |
3,000
-18,100
| -86% | -$82.2K |
|
|
VMEO
6919
DELISTED
Vimeo
VMEO
| $15K | ﹤0.01% |
3,137
-22,449
| -88% | -$102K |
|
6920
PUT
Vanda Pharmaceuticals
VNDA
$304M
| $15K | ﹤0.01% |
3,200
-31,800
| -91% | -$170K |
|
6921
PUT
Wabash National
WNC
$504M
| $15K | ﹤0.01% |
800
-600
| -43% | -$12.1K |
|
6922
CALL
Beyond Air
XAIR
$3.97M
| $15K | ﹤0.01% |
101
+2
| +2% | +$384 |
|
6923
CALL
X4 Pharmaceuticals
XFOR
$377M
| $15K | ﹤0.01% |
797
-6,383
| -89% | -$133K |
|
6924
Roundhill Daily 2X Long Magnificent Seven ETF
MAGX
$48.5M
| $15K | ﹤0.01% |
430
+340
| +378% | +$11.4K |
|
6925
CALL
PACS Group
PACS
$7.35B
| $15K | ﹤0.01% |
+400
| New | +$14.5K |
|
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.