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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6226
NETGEAR
NTGR
$616M
| $34K | ﹤0.01% |
2,432
-19,690
| -89% | -$297K |
|
6227
PUT
Blue Owl Capital
OBDC
$5.36B
| $34K | ﹤0.01% |
38,000
-30,900
| -45% | -$404K |
|
6228
Open Text
OTEX
$6.15B
| $34K | ﹤0.01% |
832
-13,518
| -94% | -$543K |
|
6229
CALL
Outfront Media
OUT
$5.62B
| $34K | ﹤0.01% |
2,235
-9,652
| -81% | -$145K |
|
|
6230
PUT
Outfront Media
OUT
$5.62B
| $34K | ﹤0.01% |
2,235
+1,829
| +450% | +$27.5K |
|
6231
CALL
Post Holdings
POST
$4.21B
| $34K | ﹤0.01% |
400
-1,700
| -81% | -$149K |
|
|
SII
6232
Sprott
SII
$2.75B
| $34K | ﹤0.01% |
+1,062
| New | +$36.7K |
|
6233
CALL
Tradeweb Markets
TW
$20.8B
| $34K | ﹤0.01% |
500
-17,400
| -97% | -$1.23M |
|
6234
PUT
Verastem
VSTM
$536M
| $34K | ﹤0.01% |
+4,600
| New | +$31.9K |
|
|
CCEC
6235
CALL
Capital Clean Energy Carriers
CCEC
$1.35B
| $34K | ﹤0.01% |
2,500
-3,900
| -61% | -$51.6K |
|
|
LILM
6236
DELISTED
Lilium N.V. Class A Ordinary Shares
LILM
| $34K | ﹤0.01% |
19,421
-7,685
| -28% | -$7.16K |
|
|
HA
6237
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $34K | ﹤0.01% |
3,200
+1,600
| +100% | +$13.9K |
|
6238
APi Group
APG
$17B
| $33K | ﹤0.01% |
1,860
+988
| +113% | +$15.3K |
|
6239
CALL
BioAtla
BCAB
$5.61M
| $33K | ﹤0.01% |
226
-122
| -35% | -$21K |
|
|
BCYC
6240
CALL
Bicycle Therapeutics
BCYC
$280M
| $33K | ﹤0.01% |
1,300
-96,500
| -99% | -$2.24M |
|
6241
CALL
Boston Omaha
BOC
$425M
| $33K | ﹤0.01% |
1,800
+900
| +100% | +$18.3K |
|
6242
PUT
Broadridge
BR
$17.9B
| $33K | ﹤0.01% |
+200
| New | +$30.3K |
|
6243
PUT
Cabot Corp
CBT
$4.55B
| $33K | ﹤0.01% |
500
-13,200
| -96% | -$940K |
|
6244
Cheniere Energy
CQP
$31.5B
| $33K | ﹤0.01% |
727
+370
| +104% | +$17K |
|
6245
CALL
CRH
CRH
$64.1B
| $33K | ﹤0.01% |
600
+500
| +500% | +$25K |
|
6246
CALL
CVRx
CVRX
$143M
| $33K | ﹤0.01% |
2,200
-21,100
| -91% | -$257K |
|
6247
Enlivex Ltd
ENLV
$32.8M
| $33K | ﹤0.01% |
845
-3
| -0.4% | -$125 |
|
6248
Ezcorp Inc
EZPW
$1.79B
| $33K | ﹤0.01% |
3,984
+2,600
| +188% | +$22.5K |
|
|
GAN
6249
CALL
DELISTED
GAN Ltd
GAN
| $33K | ﹤0.01% |
20,200
-10,400
| -34% | -$14.8K |
|
6250
Golub Capital BDC
GBDC
$3.34B
| $33K | ﹤0.01% |
2,456
+2,269
| +1,213% | +$30.1K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.