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 | |
|---|---|---|---|---|---|---|
5001
CALL
Viasat
VSAT
$11B
| $148K | ﹤0.01% |
4,900
+2,000
| +69% | +$67K |
|
|
PDCO
5002
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $148K | ﹤0.01% |
6,200
+3,400
| +121% | +$97.3K |
|
5003
Advanced Micro Devices
AMD
$786B
| $147K | ﹤0.01% |
2,334
-365,499
| -99% | -$31.1M |
|
|
HEES
5004
PUT
DELISTED
H&E Equipment Services
HEES
| $147K | ﹤0.01% |
5,200
+3,500
| +206% | +$110K |
|
|
NXDR
5005
CALL
Nextdoor Holdings
NXDR
$866M
| $147K | ﹤0.01% |
52,800
-172,400
| -77% | -$568K |
|
5006
PUT
Regis Corp
RGS
$68.6M
| $147K | ﹤0.01% |
+7,300
| New | +$161K |
|
|
ENZ
5007
PUT
DELISTED
Enzo Biochem, Inc.
ENZ
| $147K | ﹤0.01% |
66,200
+44,100
| +200% | +$107K |
|
5008
PUT
MaxLinear
MXL
$6.14B
| $146K | ﹤0.01% |
4,500
+2,000
| +80% | +$74K |
|
5009
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.6B
| $146K | ﹤0.01% |
3,533
-491
| -12% | -$22.9K |
|
5010
PUT
Trimble
TRMB
$13.4B
| $146K | ﹤0.01% |
2,700
-100
| -4% | -$6.33K |
|
|
SOLO
5011
CALL
DELISTED
Electrameccanica Vehicles Corp. Ltd.
SOLO
| $146K | ﹤0.01% |
119,900
-18,700
| -13% | -$27.2K |
|
5012
PUT
Century Aluminum
CENX
$4.4B
| $145K | ﹤0.01% |
27,600
-12,000
| -30% | -$91.2K |
|
5013
ProShares Ultra Energy
DIG
$81.1M
| $145K | ﹤0.01% |
4,774
-4,031
| -46% | -$135K |
|
5014
PUT
Essex Property Trust
ESS
$18.3B
| $145K | ﹤0.01% |
600
+500
| +500% | +$135K |
|
5015
EverQuote
EVER
$883M
| $145K | ﹤0.01% |
21,302
+20,839
| +4,501% | +$195K |
|
5016
CALL
Omeros
OMER
$889M
| $145K | ﹤0.01% |
46,300
+3,500
| +8% | +$16.2K |
|
|
LGF.A
5017
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $145K | ﹤0.01% |
19,595
+15,931
| +435% | +$152K |
|
|
KNBE
5018
PUT
DELISTED
KnowBe4, Inc. Class A Common Stock
KNBE
| $145K | ﹤0.01% |
7,000
-12,700
| -64% | -$234K |
|
5019
CALL
BioAtla
BCAB
$5.53M
| $144K | ﹤0.01% |
376
+350
| +1,346% | +$115K |
|
5020
PUT
Coca-Cola Europacific Partners
CCEP
$47.5B
| $144K | ﹤0.01% |
3,400
-4,300
| -56% | -$216K |
|
5021
PUT
eHealth
EHTH
$44.4M
| $144K | ﹤0.01% |
36,900
-11,400
| -24% | -$79.5K |
|
5022
CALL
MYR Group
MYRG
$5.27B
| $144K | ﹤0.01% |
+1,700
| New | +$156K |
|
5023
Phillips 66
PSX
$83.7B
| $144K | ﹤0.01% |
1,792
-38,831
| -96% | -$3.31M |
|
5024
CALL
Q2 Holdings
QTWO
$3.92B
| $144K | ﹤0.01% |
+4,500
| New | +$183K |
|
5025
Signet Jewelers
SIG
$3.67B
| $144K | ﹤0.01% |
2,518
-10,189
| -80% | -$614K |
|
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.