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
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4426
CALL
Carlyle Secured Lending
CGBD
$694M
| $229K | ﹤0.01% |
20,100
+13,700
| +214% | +$186K |
|
4427
IPG Photonics
IPGP
$3.61B
| $229K | ﹤0.01% |
+2,724
| New | +$259K |
|
4428
PUT
The Joint Corp
JYNT
$118M
| $229K | ﹤0.01% |
14,600
+1,800
| +14% | +$32K |
|
4429
CALL
KLX Energy Services
KLXE
$45M
| $229K | ﹤0.01% |
27,900
+27,100
| +3,388% | +$163K |
|
4430
PUT
Kinsale Capital Group
KNSL
$8.12B
| $229K | ﹤0.01% |
900
+100
| +13% | +$24.9K |
|
4431
Pentair
PNR
$10.4B
| $229K | ﹤0.01% |
+5,658
| New | +$262K |
|
|
SPCK
4432
The SPAC and New Issue ETF
SPCK
$8.28M
| $229K | ﹤0.01% |
+8,749
| New | +$237K |
|
|
RADA
4433
PUT
DELISTED
Rada Electronic Industries Ltd
RADA
| $229K | ﹤0.01% |
23,800
-63,600
| -73% | -$648K |
|
|
API
4434
Agora
API
$338M
| $228K | ﹤0.01% |
62,952
+44,271
| +237% | +$209K |
|
|
XRN
4435
PUT
Chiron Real Estate Inc
XRN
$514M
| $228K | ﹤0.01% |
5,360
+1,840
| +52% | +$101K |
|
4436
CALL
Kearny Financial
KRNY
$604M
| $228K | ﹤0.01% |
21,500
+21,400
| +21,400% | +$246K |
|
4437
CALL
Liberty Global Class C
LBTYK
$3.53B
| $228K | ﹤0.01% |
14,200
-26,200
| -65% | -$556K |
|
4438
CALL
abrdn Physical Silver Shares ETF
SIVR
$4.02B
| $228K | ﹤0.01% |
12,500
-7,100
| -36% | -$131K |
|
|
VLD
4439
CALL
DELISTED
Velo3D, Inc.
VLD
| $228K | ﹤0.01% |
1,660
+291
| +21% | +$37.8K |
|
|
ALBO
4440
PUT
DELISTED
Albireo Pharma Inc
ALBO
| $228K | ﹤0.01% |
11,800
+200
| +2% | +$4.14K |
|
4441
PUT
Clean Energy Fuels
CLNE
$427M
| $227K | ﹤0.01% |
42,600
-500
| -1% | -$3.13K |
|
4442
CALL
Howard Hughes
HHH
$3.81B
| $227K | ﹤0.01% |
4,301
+944
| +28% | +$60.4K |
|
|
LNW
4443
PUT
DELISTED
Light & Wonder
LNW
| $227K | ﹤0.01% |
5,300
+2,600
| +96% | +$128K |
|
4444
Amplify Alternative Harvest ETF
MJ
$101M
| $227K | ﹤0.01% |
4,129
-5,826
| -59% | -$404K |
|
4445
Viridian Therapeutics
VRDN
$2.09B
| $227K | ﹤0.01% |
11,070
+9,831
| +793% | +$177K |
|
|
AVID
4446
PUT
DELISTED
Avid Technology Inc
AVID
| $227K | ﹤0.01% |
9,800
+8,800
| +880% | +$230K |
|
|
ADVM
4447
CALL
DELISTED
Adverum Biotechnologies
ADVM
| $226K | ﹤0.01% |
23,850
-12,800
| -35% | -$168K |
|
4448
PUT
Apple Hospitality REIT
APLE
$3.9B
| $226K | ﹤0.01% |
16,100
+15,600
| +3,120% | +$248K |
|
|
MESO
4449
CALL
Mesoblast
MESO
$1.84B
| $226K | ﹤0.01% |
44,550
+4,550
| +11% | +$27.5K |
|
|
NOAH
4450
Noah Holdings
NOAH
$580M
| $226K | ﹤0.01% |
+17,116
| New | +$291K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.