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 | |
|---|---|---|---|---|---|---|
2401
PUT
LPL Financial
LPLA
$26.5B
| $1.25M | ﹤0.01% |
5,700
-5,600
| -50% | -$1.19M |
|
|
SAGE
2402
CALL
DELISTED
Sage Therapeutics
SAGE
| $1.25M | ﹤0.01% |
31,800
+16,400
| +106% | +$634K |
|
2403
PUT
ADT
ADT
$5.24B
| $1.24M | ﹤0.01% |
166,000
+44,800
| +37% | +$338K |
|
2404
CALL
Omnicom Group
OMC
$23.5B
| $1.24M | ﹤0.01% |
19,700
+4,900
| +33% | +$332K |
|
|
AY
2405
CALL
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $1.24M | ﹤0.01% |
47,200
+21,900
| +87% | +$724K |
|
2406
CALL
Eldorado Gold
EGO
$8.48B
| $1.24M | ﹤0.01% |
205,800
-25,200
| -11% | -$148K |
|
2407
CALL
EPR Properties
EPR
$4.85B
| $1.24M | ﹤0.01% |
34,600
+6,100
| +21% | +$288K |
|
|
SNP
2408
PUT
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $1.24M | ﹤0.01% |
28,900
-46,200
| -62% | -$2.12M |
|
2409
CALL
Artisan Partners
APAM
$2.86B
| $1.24M | ﹤0.01% |
45,900
-6,300
| -12% | -$222K |
|
2410
CALL
Prothena Corp
PRTA
$455M
| $1.24M | ﹤0.01% |
20,400
-32,200
| -61% | -$1.02M |
|
2411
PUT
argenx
ARGX
$55.6B
| $1.24M | ﹤0.01% |
3,500
+2,500
| +250% | +$926K |
|
2412
TechnipFMC
FTI
$29.9B
| $1.23M | ﹤0.01% |
145,957
+36,328
| +33% | +$286K |
|
2413
PUT
SentinelOne
S
$6.22B
| $1.23M | ﹤0.01% |
48,300
-52,500
| -52% | -$1.38M |
|
|
SIVB
2414
DELISTED
SVB Financial Group
SIVB
| $1.23M | ﹤0.01% |
+3,671
| New | +$1.48M |
|
2415
CALL
Amdocs
DOX
$5.63B
| $1.23M | ﹤0.01% |
15,500
-17,700
| -53% | -$1.5M |
|
2416
CALL
Sempra
SRE
$59.6B
| $1.23M | ﹤0.01% |
16,400
-7,000
| -30% | -$566K |
|
2417
iShares US Medical Devices ETF
IHI
$3.06B
| $1.23M | ﹤0.01% |
+26,029
| New | +$1.35M |
|
|
NVTA
2418
PUT
DELISTED
Invitae Corporation
NVTA
| $1.23M | ﹤0.01% |
499,200
+324,000
| +185% | +$983K |
|
2419
PUT
Helmerich & Payne
HP
$3.36B
| $1.23M | ﹤0.01% |
33,200
+200
| +0.6% | +$8.41K |
|
|
XM
2420
CALL
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $1.23M | ﹤0.01% |
120,500
-47,100
| -28% | -$585K |
|
2421
PUT
McEwen Inc
MUX
$1.04B
| $1.23M | ﹤0.01% |
375,800
+302,440
| +412% | +$1.04M |
|
2422
CALL
Box
BOX
$4.18B
| $1.22M | ﹤0.01% |
50,200
+8,300
| +20% | +$228K |
|
2423
Haleon
HLN
$43.8B
| $1.22M | ﹤0.01% |
+201,107
| New | +$1.3M |
|
2424
CALL
Privia Health
PRVA
$3.11B
| $1.22M | ﹤0.01% |
35,900
+20,300
| +130% | +$751K |
|
|
DCP
2425
CALL
DELISTED
DCP Midstream, LP
DCP
| $1.22M | ﹤0.01% |
32,500
+13,700
| +73% | +$480K |
|
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.