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 | |
|---|---|---|---|---|---|---|
6276
CALL
Rezolute
RZLT
$470M
| $33K | ﹤0.01% |
6,900
+4,500
| +188% | +$20.7K |
|
6277
PUT
Seanergy Maritime Holdings
SHIP
$386M
| $33K | ﹤0.01% |
2,700
-6,700
| -71% | -$70.1K |
|
6278
Shattuck Labs
STTK
$687M
| $33K | ﹤0.01% |
9,598
+8,685
| +951% | +$32.4K |
|
6279
PUT
Worthington Enterprises
WOR
$2.74B
| $33K | ﹤0.01% |
800
-600
| -43% | -$27.3K |
|
6280
XPEL
XPEL
$1.22B
| $33K | ﹤0.01% |
783
-409
| -34% | -$16.5K |
|
6281
Amer Sports
AS
$21B
| $33K | ﹤0.01% |
2,130
-842
| -28% | -$10.8K |
|
|
CMBT
6282
PUT
CMB.TECH NV
CMBT
$4.65B
| $33K | ﹤0.01% |
2,000
+800
| +67% | +$13.2K |
|
|
PTVE
6283
PUT
DELISTED
Pactiv Evergreen Inc. Common stock
PTVE
| $33K | ﹤0.01% |
2,900
+2,000
| +222% | +$22.9K |
|
|
AHT
6284
Ashford Hospitality Trust
AHT
$20.9M
| $32K | ﹤0.01% |
4,395
+507
| +13% | +$4.75K |
|
6285
PUT
Akebia Therapeutics
AKBA
$362M
| $32K | ﹤0.01% |
24,800
-72,600
| -75% | -$96.9K |
|
6286
Arcturus Therapeutics
ARCT
$168M
| $32K | ﹤0.01% |
+1,381
| New | +$29.5K |
|
6287
PUT
Arvinas
ARVN
$536M
| $32K | ﹤0.01% |
1,300
-300
| -19% | -$7.83K |
|
|
AUTL
6288
Autolus Therapeutics
AUTL
$407M
| $32K | ﹤0.01% |
8,816
+8,800
| +55,000% | +$35.1K |
|
6289
PUT
BGC Group
BGC
$5.6B
| $32K | ﹤0.01% |
3,500
-12,800
| -79% | -$120K |
|
|
BRY
6290
CALL
DELISTED
Berry Corp
BRY
| $32K | ﹤0.01% |
6,400
-3,200
| -33% | -$19.5K |
|
6291
PUT
Cognex
CGNX
$10.4B
| $32K | ﹤0.01% |
800
-1,400
| -64% | -$59.6K |
|
6292
Donaldson
DCI
$10.7B
| $32K | ﹤0.01% |
435
-624
| -59% | -$45.1K |
|
6293
PUT
DXP Enterprises
DXPE
$2.4B
| $32K | ﹤0.01% |
+600
| New | +$30.1K |
|
6294
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$147M
| $32K | ﹤0.01% |
+857
| New | +$28.2K |
|
6295
CALL
VanEck Energy Income ETF
EINC
$77.9M
| $32K | ﹤0.01% |
1,600
+300
| +23% | +$24.7K |
|
6296
PUT
Freshworks
FRSH
$3.11B
| $32K | ﹤0.01% |
2,800
-148,500
| -98% | -$1.78M |
|
6297
iShares US Healthcare ETF
IYH
$3.39B
| $32K | ﹤0.01% |
500
+300
| +150% | +$19.2K |
|
6298
PUT
Kontoor Brands
KTB
$4.63B
| $32K | ﹤0.01% |
400
-9,800
| -96% | -$699K |
|
6299
VanEck Merk Gold Trust
OUNZ
$2.55B
| $32K | ﹤0.01% |
+1,296
| New | +$31K |
|
6300
Pliant Therapeutics
PLRX
$65.6M
| $32K | ﹤0.01% |
2,858
+1,165
| +69% | +$14.6K |
|
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.