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 | |
|---|---|---|---|---|---|---|
4726
Clearwater Paper
CLW
$339M
| $183K | ﹤0.01% |
4,874
+2,156
| +79% | +$85.4K |
|
|
DCBO
4727
PUT
Docebo
DCBO
$525M
| $183K | ﹤0.01% |
6,800
+6,700
| +6,700% | +$204K |
|
|
AGNT
4728
PUT
AGNT Inc
AGNT
$666M
| $183K | ﹤0.01% |
16,400
-22,000
| -57% | -$307K |
|
4729
CALL
Green Brick Partners
GRBK
$3.04B
| $183K | ﹤0.01% |
8,600
-2,400
| -22% | -$59.2K |
|
4730
PUT
OR Royalties Inc
OR
$5.58B
| $183K | ﹤0.01% |
18,000
+3,600
| +25% | +$36.1K |
|
4731
CALL
RPM International
RPM
$13.7B
| $183K | ﹤0.01% |
2,200
+1,400
| +175% | +$124K |
|
4732
CALL
Sabesp
SBS
$19.1B
| $183K | ﹤0.01% |
+103,646
| New | +$176K |
|
4733
PUT
TaskUs
TASK
$556M
| $183K | ﹤0.01% |
11,400
+6,200
| +119% | +$109K |
|
4734
PUT
Weave Communications
WEAV
$520M
| $183K | ﹤0.01% |
36,400
+16,700
| +85% | +$85.4K |
|
4735
PUT
Casey's General Stores
CASY
$32.2B
| $182K | ﹤0.01% |
900
-5,000
| -85% | -$1.04M |
|
4736
CALL
Fortune Brands Innovations
FBIN
$5.88B
| $182K | ﹤0.01% |
3,978
+2,457
| +162% | +$133K |
|
4737
PUT
ITT
ITT
$17.5B
| $182K | ﹤0.01% |
2,800
-700
| -20% | -$51K |
|
4738
CALL
Moelis & Co
MC
$4.97B
| $182K | ﹤0.01% |
5,400
+3,000
| +125% | +$126K |
|
4739
CALL
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $182K | ﹤0.01% |
4,600
-17,600
| -79% | -$852K |
|
4740
Similarweb
SMWB
$628M
| $182K | ﹤0.01% |
31,152
+31,091
| +50,969% | +$257K |
|
|
UDMY
4741
CALL
DELISTED
Udemy
UDMY
| $182K | ﹤0.01% |
15,100
-27,200
| -64% | -$363K |
|
|
BTWN
4742
PUT
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $182K | ﹤0.01% |
18,200
+15,700
| +628% | +$157K |
|
|
LFTR
4743
PUT
DELISTED
Lefteris Acquisition Corp. Class A Common Stock
LFTR
| $182K | ﹤0.01% |
18,200
+16,100
| +767% | +$160K |
|
4744
PUT
Barnes & Noble Education
BNED
$431M
| $181K | ﹤0.01% |
755
+25
| +3% | +$6.68K |
|
|
DEA
4745
PUT
Easterly Government Properties
DEA
$1.13B
| $181K | ﹤0.01% |
4,600
+2,000
| +77% | +$92.6K |
|
4746
PUT
LivePerson
LPSN
$21.8M
| $181K | ﹤0.01% |
1,287
-5,593
| -81% | -$1.07M |
|
4747
CALL
Marcus Corp
MCS
$897M
| $181K | ﹤0.01% |
13,100
+6,700
| +105% | +$108K |
|
4748
CALL
NETSCOUT
NTCT
$2.96B
| $181K | ﹤0.01% |
5,800
-52,100
| -90% | -$1.7M |
|
4749
PUT
TC Energy
TRP
$70.2B
| $181K | ﹤0.01% |
4,500
-1,300
| -22% | -$64.5K |
|
|
SPI
4750
CALL
DELISTED
SPI Energy Co., Ltd. Ordinary Shares
SPI
| $181K | ﹤0.01% |
138,500
+5,600
| +4% | +$10.1K |
|
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.