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
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6376
CALL
CMS Energy
CMS
$23.3B
| $29K | ﹤0.01% |
500
-4,900
| -91% | -$296K |
|
6377
Curtiss-Wright
CW
$25.1B
| $29K | ﹤0.01% |
+161
| New | +$27.4K |
|
6378
CALL
National Beverage
FIZZ
$3.06B
| $29K | ﹤0.01% |
600
| – | – |
|
6379
PUT
Gain Therapeutics
GANX
$72.1M
| $29K | ﹤0.01% |
6,500
+4,200
| +183% | +$20.5K |
|
6380
Graco
GGG
$13.2B
| $29K | ﹤0.01% |
344
-786
| -70% | -$61.1K |
|
6381
PUT
Gentex
GNTX
$5.1B
| $29K | ﹤0.01% |
1,000
-400
| -29% | -$11K |
|
6382
Gold Royalty Corp
GROY
$602M
| $29K | ﹤0.01% |
16,605
-11,236
| -40% | -$23.2K |
|
6383
Huazhu Hotels Group
HTHT
$13.3B
| $29K | ﹤0.01% |
768
-12,374
| -94% | -$538K |
|
6384
Imperial Petroleum
IMPP
$212M
| $29K | ﹤0.01% |
9,700
+8,469
| +688% | +$28.2K |
|
|
JAMF
6385
CALL
DELISTED
Jamf
JAMF
| $29K | ﹤0.01% |
1,500
-5,100
| -77% | -$94.4K |
|
6386
CALL
Janus International
JBI
$702M
| $29K | ﹤0.01% |
2,800
-6,200
| -69% | -$58K |
|
6387
CALL
Littelfuse
LFUS
$10.4B
| $29K | ﹤0.01% |
+100
| New | +$26.2K |
|
|
6388
PUT
Littelfuse
LFUS
$10.4B
| $29K | ﹤0.01% |
+100
| New | +$26.2K |
|
6389
CALL
Mercer International
MERC
$40.5M
| $29K | ﹤0.01% |
3,700
+500
| +16% | +$4.54K |
|
6390
CALL
Blue Owl Capital
OBDC
$5.35B
| $29K | ﹤0.01% |
108,700
+47,700
| +78% | +$624K |
|
6391
CALL
Prestige Consumer Healthcare
PBH
$2.47B
| $29K | ﹤0.01% |
+500
| New | +$29.9K |
|
6392
PUT
POSCO
PKX
$14.7B
| $29K | ﹤0.01% |
400
+200
| +100% | +$14.5K |
|
6393
PUT
Palomar
PLMR
$3.79B
| $29K | ﹤0.01% |
500
-2,900
| -85% | -$155K |
|
|
RDUS
6394
CALL
DELISTED
Radius Recycling
RDUS
| $29K | ﹤0.01% |
1,000
+600
| +150% | +$18K |
|
|
REE
6395
CALL
DELISTED
REE Automotive
REE
| $29K | ﹤0.01% |
2,630
-33
| -1% | -$351 |
|
6396
PUT
RLX Technology
RLX
$2.37B
| $29K | ﹤0.01% |
16,500
-64,600
| -80% | -$145K |
|
|
RDNW
6397
CALL
RideNow Group
RDNW
$256M
| $29K | ﹤0.01% |
2,400
+1,300
| +118% | +$12.1K |
|
6398
CALL
TTM Technologies
TTMI
$10.6B
| $29K | ﹤0.01% |
2,100
+100
| +5% | +$1.29K |
|
6399
CALL
Village Farms International
VFF
$240M
| $29K | ﹤0.01% |
50,000
-2,600
| -5% | -$1.85K |
|
6400
Workhorse Group
WKHS
$33.4M
| $29K | ﹤0.01% |
+11
| New | +$31.7K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.