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 | |
|---|---|---|---|---|---|---|
4351
CALL
W.W. Grainger
GWW
$65.3B
| $244K | ﹤0.01% |
500
-4,600
| -90% | -$2.42M |
|
4352
PUT
Magnite
MGNI
$2.76B
| $244K | ﹤0.01% |
37,200
-18,200
| -33% | -$146K |
|
4353
PUT
Omeros
OMER
$857M
| $244K | ﹤0.01% |
77,600
+56,800
| +273% | +$263K |
|
4354
CALL
Archer Aviation
ACHR
$3.54B
| $243K | ﹤0.01% |
93,200
-18,500
| -17% | -$65K |
|
4355
PUT
Allison Transmission
ALSN
$9.5B
| $243K | ﹤0.01% |
7,200
-14,400
| -67% | -$539K |
|
4356
CALL
Evolution Petroleum
EPM
$132M
| $243K | ﹤0.01% |
35,000
+26,000
| +289% | +$171K |
|
4357
CALL
Energy Recovery
ERII
$446M
| $243K | ﹤0.01% |
11,200
+4,600
| +70% | +$104K |
|
4358
PUT
Federal Realty Investment Trust
FRT
$10.7B
| $243K | ﹤0.01% |
2,700
+1,700
| +170% | +$173K |
|
4359
PUT
Liberty Broadband Class C
LBRDK
$4.88B
| $243K | ﹤0.01% |
3,300
-500
| -13% | -$53.2K |
|
4360
PUT
Alaunos Therapeutics
TCRT
$4.59M
| $243K | ﹤0.01% |
945
+809
| +595% | +$235K |
|
4361
CALL
Tootsie Roll Industries
TR
$2.93B
| $243K | ﹤0.01% |
8,236
-2,025
| -20% | -$63.2K |
|
|
GTHX
4362
DELISTED
G1 Therapeutics, Inc. Common Stock
GTHX
| $243K | ﹤0.01% |
+19,501
| New | +$223K |
|
4363
Acadia Pharmaceuticals
ACAD
$4.43B
| $242K | ﹤0.01% |
14,802
+9,502
| +179% | +$154K |
|
4364
PUT
AdaptHealth
AHCO
$1.47B
| $242K | ﹤0.01% |
12,900
+12,700
| +6,350% | +$261K |
|
4365
CALL
AquaBounty Technologies
AQB
$4.66M
| $242K | ﹤0.01% |
15,525
-870
| -5% | -$22.9K |
|
4366
PUT
Brink's
BCO
$4.88B
| $242K | ﹤0.01% |
5,000
+3,800
| +317% | +$212K |
|
4367
Freshpet
FRPT
$2.93B
| $242K | ﹤0.01% |
4,832
+4,754
| +6,095% | +$224K |
|
4368
PUT
Dorian LPG
LPG
$2.03B
| $242K | ﹤0.01% |
17,900
+13,500
| +307% | +$203K |
|
4369
CALL
Protalix BioTherapeutics
PLX
$191M
| $242K | ﹤0.01% |
233,100
-129,100
| -36% | -$143K |
|
4370
PUT
Purple Innovation
PRPL
$35.3M
| $242K | ﹤0.01% |
2,396
+1,600
| +201% | +$139K |
|
|
LGF.B
4371
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $242K | ﹤0.01% |
32,900
+19,500
| +146% | +$177K |
|
4372
Commercial Metals
CMC
$7.6B
| $241K | ﹤0.01% |
6,805
-632
| -8% | -$24.4K |
|
4373
CALL
Ramaco Resources Class A
METC
$599M
| $241K | ﹤0.01% |
27,080
+24,703
| +1,039% | +$255K |
|
4374
Organon & Co
OGN
$3.56B
| $241K | ﹤0.01% |
+10,302
| New | +$311K |
|
4375
Vital Farms
VITL
$545M
| $241K | ﹤0.01% |
20,137
+17,267
| +602% | +$206K |
|
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.