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 | |
|---|---|---|---|---|---|---|
3751
PUT
Rogers Corp
ROG
$2.13B
| $323K | ﹤0.01% |
2,000
-3,300
| -62% | -$523K |
|
|
SNCY
3752
PUT
DELISTED
Sun Country Airlines
SNCY
| $323K | ﹤0.01% |
14,400
+14,300
| +14,300% | +$273K |
|
3753
CALL
USA Compression Partners
USAC
$3.75B
| $323K | ﹤0.01% |
16,400
+8,900
| +119% | +$179K |
|
|
CHX
3754
CALL
DELISTED
ChampionX
CHX
| $322K | ﹤0.01% |
10,400
+2,600
| +33% | +$71.6K |
|
|
EVRI
3755
CALL
DELISTED
Everi Holdings
EVRI
| $322K | ﹤0.01% |
22,300
-31,600
| -59% | -$480K |
|
3756
CALL
Globalstar
GSAT
$10.2B
| $322K | ﹤0.01% |
19,900
+1,220
| +7% | +$19.6K |
|
3757
CALL
Centrus Energy
LEU
$3.34B
| $322K | ﹤0.01% |
9,900
+1,300
| +15% | +$40.2K |
|
|
ARNC
3758
PUT
DELISTED
Arconic Corporation
ARNC
| $322K | ﹤0.01% |
10,900
-51,300
| -82% | -$1.42M |
|
3759
CALL
Revolve Group
RVLV
$1.92B
| $321K | ﹤0.01% |
19,600
+5,200
| +36% | +$96.9K |
|
3760
PUT
Main Street Capital
MAIN
$5.14B
| $320K | ﹤0.01% |
8,000
-5,500
| -41% | -$218K |
|
3761
Schneider National
SNDR
$6.34B
| $320K | ﹤0.01% |
+11,163
| New | +$297K |
|
|
ATSG
3762
CALL
DELISTED
Air Transport Services Group
ATSG
| $320K | ﹤0.01% |
17,000
+15,900
| +1,445% | +$296K |
|
|
PETQ
3763
CALL
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $320K | ﹤0.01% |
21,100
+1,400
| +7% | +$18K |
|
3764
PUT
CleanSpark
CLSK
$3.46B
| $319K | ﹤0.01% |
74,500
+14,600
| +24% | +$58.6K |
|
3765
PUT
Smith & Wesson
SWBI
$657M
| $319K | ﹤0.01% |
24,500
-8,900
| -27% | -$108K |
|
3766
Zymeworks
ZYME
$1.66B
| $319K | ﹤0.01% |
37,024
+36,130
| +4,041% | +$323K |
|
3767
PUT
Delek US
DK
$3.85B
| $318K | ﹤0.01% |
13,300
+2,800
| +27% | +$63.6K |
|
3768
CALL
Pulmonx
LUNG
$52.8M
| $318K | ﹤0.01% |
24,300
-11,400
| -32% | -$139K |
|
|
TIGR
3769
PUT
UP Fintech Holding
TIGR
$858M
| $318K | ﹤0.01% |
112,000
-46,200
| -29% | -$137K |
|
|
TGH
3770
PUT
DELISTED
Textainer Group Holdings limited
TGH
| $318K | ﹤0.01% |
8,100
+4,100
| +103% | +$150K |
|
3771
Ambev
ABEV
$48.4B
| $317K | ﹤0.01% |
+99,914
| New | +$294K |
|
3772
PUT
Pagaya Technologies
PGY
$1.38B
| $317K | ﹤0.01% |
18,917
+16,592
| +714% | +$207K |
|
|
NVRO
3773
DELISTED
NEVRO CORP.
NVRO
| $317K | ﹤0.01% |
12,471
+2,316
| +23% | +$66.9K |
|
|
NVMI
3774
PUT
Nova
NVMI
$12.8B
| $316K | ﹤0.01% |
2,700
+1,200
| +80% | +$123K |
|
3775
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $315K | ﹤0.01% |
37,600
+17,200
| +84% | +$169K |
|
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.