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 | |
|---|---|---|---|---|---|---|
6226
Conduent
CNDT
$245M
| $34K | ﹤0.01% |
8,578
+4,419
| +106% | +$16.2K |
|
6227
Torrid Holdings
CURV
$260M
| $34K | ﹤0.01% |
8,797
+6,800
| +341% | +$45.8K |
|
6228
CALL
Gerdau
GGB
$9.74B
| $34K | ﹤0.01% |
9,800
+4,300
| +78% | +$14.1K |
|
6229
PUT
Garrett Motion
GTX
$5.78B
| $34K | ﹤0.01% |
4,200
-10,800
| -72% | -$90.8K |
|
6230
Quadratic Interest Rate Volatility and Inflation Hedge ETF
IVOL
$273M
| $34K | ﹤0.01% |
1,767
+1,123
| +174% | +$21.5K |
|
6231
JELD-WEN Holding
JELD
$117M
| $34K | ﹤0.01% |
2,212
-17,176
| -89% | -$252K |
|
|
NFBK
6232
PUT
DELISTED
Northfield Bancorp
NFBK
| $34K | ﹤0.01% |
+3,000
| New | +$34.4K |
|
6233
CALL
Puma Biotechnology
PBYI
$402M
| $34K | ﹤0.01% |
13,500
+10,100
| +297% | +$30.6K |
|
6234
PetMed Express
PETS
$42.3M
| $34K | ﹤0.01% |
9,387
-29,963
| -76% | -$106K |
|
6235
Red Violet
RDVT
$964M
| $34K | ﹤0.01% |
+1,219
| New | +$33.1K |
|
6236
PUT
Rekor Systems
REKR
$84.6M
| $34K | ﹤0.01% |
29,200
-1,500
| -5% | -$2.21K |
|
6237
CALL
Construction Partners
ROAD
$5.75B
| $34K | ﹤0.01% |
+500
| New | +$30.8K |
|
6238
CALL
Senseonics Holdings Inc
SENS
$265M
| $34K | ﹤0.01% |
4,975
+910
| +22% | +$7.34K |
|
6239
Champion Homes
SKY
$4.41B
| $34K | ﹤0.01% |
361
-497
| -58% | -$41.7K |
|
|
SNCR
6240
PUT
DELISTED
Synchronoss Technologies
SNCR
| $34K | ﹤0.01% |
2,300
+1,300
| +130% | +$15.2K |
|
|
TGNA
6241
PUT
DELISTED
TEGNA Inc
TGNA
| $34K | ﹤0.01% |
2,200
+100
| +5% | +$1.46K |
|
6242
PUT
Unisys
UIS
$230M
| $34K | ﹤0.01% |
+6,000
| New | +$29.7K |
|
6243
iShares MSCI USA Min Vol Factor ETF
USMV
$23.5B
| $34K | ﹤0.01% |
378
-1,745
| -82% | -$154K |
|
6244
Vanguard Consumer Staples ETF
VDC
$8B
| $34K | ﹤0.01% |
+160
| New | +$33.9K |
|
6245
CALL
Vera Bradley
VRA
$99.2M
| $34K | ﹤0.01% |
6,400
-17,000
| -73% | -$100K |
|
|
SEI
6246
CALL
Solaris Energy Infrastructure
SEI
$3.14B
| $34K | ﹤0.01% |
2,700
+1,600
| +145% | +$19.1K |
|
|
ZUO
6247
DELISTED
Zuora, Inc.
ZUO
| $34K | ﹤0.01% |
+4,028
| New | +$35.7K |
|
6248
PUT
Alkermes
ALKS
$8.39B
| $33K | ﹤0.01% |
1,200
-4,900
| -80% | -$131K |
|
|
BHR
6249
PUT
Braemar Hotels & Resorts
BHR
$160M
| $33K | ﹤0.01% |
10,700
-700
| -6% | -$2.2K |
|
6250
CALL
Bio-Rad Laboratories Class A
BIO
$8.74B
| $33K | ﹤0.01% |
100
-500
| -83% | -$159K |
|
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.