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 | |
|---|---|---|---|---|---|---|
9551
LifeVantage
LFVN
$82.4M
| $1K | ﹤0.01% |
+351
| New | +$1.42K |
|
9552
CALL
Lincoln Educational Services
LINC
$1.29B
| $1K | ﹤0.01% |
200
-800
| -80% | -$5.16K |
|
9553
CALL
Lindblad Expeditions
LIND
$1.76B
| $1K | ﹤0.01% |
+200
| New | +$1.74K |
|
9554
LiqTech
LIQT
$21.5M
| $1K | ﹤0.01% |
+476
| New | +$1.82K |
|
9555
PUT
Lipocine
LPCN
$17.1M
| $1K | ﹤0.01% |
206
-23
| -10% | -$257 |
|
9556
Lantern Pharma
LTRN
$35.1M
| $1K | ﹤0.01% |
373
-664
| -64% | -$3.57K |
|
9557
CALL
Lulu's Fashion Lounge
LVLU
$55M
| $1K | ﹤0.01% |
+20
| New | +$2.19K |
|
9558
LiveOne
LVO
$66M
| $1K | ﹤0.01% |
260
-379
| -59% | -$4K |
|
9559
PUT
Marcus Corp
MCS
$732M
| $1K | ﹤0.01% |
+100
| New | +$1.61K |
|
9560
Mercury Insurance
MCY
$5.94B
| $1K | ﹤0.01% |
+51
| New | +$1.85K |
|
|
LITS
9561
PUT
Lite Strategy Inc
LITS
$33.6M
| $1K | ﹤0.01% |
200
-25
| -11% | -$258 |
|
9562
CALL
Mind CTI
MNDO
$20.6M
| $1K | ﹤0.01% |
+600
| New | +$1.41K |
|
9563
CALL
MediciNova
MNOV
$65M
| $1K | ﹤0.01% |
700
-300
| -30% | -$694 |
|
9564
PUT
Everspin Technologies
MRAM
$354M
| $1K | ﹤0.01% |
200
-4,600
| -96% | -$29.3K |
|
|
MREO
9565
Mereo BioPharma
MREO
$45.9M
| $1K | ﹤0.01% |
1,862
-69,124
| -97% | -$84.6K |
|
9566
CALL
Marten Transport
MRTN
$1.33B
| $1K | ﹤0.01% |
100
-6,000
| -98% | -$120K |
|
9567
Matrix Service
MTRX
$347M
| $1K | ﹤0.01% |
470
-2,817
| -86% | -$14.4K |
|
|
LUXE
9568
CALL
LuxExperience B.V.
LUXE
$1.1B
| $1K | ﹤0.01% |
100
-200
| -67% | -$2.56K |
|
|
NCTY
9569
PUT
The9 Ltd
NCTY
$49M
| $1K | ﹤0.01% |
130
-190
| -59% | -$2.71K |
|
9570
CALL
Neonode
NEON
$13M
| $1K | ﹤0.01% |
300
-300
| -50% | -$1.29K |
|
9571
PUT
Nexa Resources
NEXA
$1.7B
| $1K | ﹤0.01% |
300
-4,400
| -94% | -$25.4K |
|
|
NEXN
9572
CALL
Nexxen International
NEXN
$547M
| $1K | ﹤0.01% |
200
| – | – |
|
|
NFBK
9573
DELISTED
Northfield Bancorp
NFBK
| $1K | ﹤0.01% |
100
| – | – |
|
9574
NovaGold Resources
NG
$2.6B
| $1K | ﹤0.01% |
344
-11,845
| -97% | -$54.8K |
|
9575
NLI Holdings
NL
$284M
| $1K | ﹤0.01% |
+200
| New | +$1.77K |
|
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.