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 | |
|---|---|---|---|---|---|---|
|
AL
3526
PUT
DELISTED
Air Lease Corp
AL
| $405K | ﹤0.01% |
9,700
-9,200
| -49% | -$364K |
|
3527
CALL
Cal-Maine
CALM
$4.39B
| $405K | ﹤0.01% |
9,000
-2,400
| -21% | -$119K |
|
3528
Perrigo
PRGO
$1.41B
| $405K | ﹤0.01% |
11,931
+5,897
| +98% | +$205K |
|
|
PSTL
3529
CALL
Postal Realty Trust
PSTL
$720M
| $405K | ﹤0.01% |
27,600
+100
| +0.4% | +$1.48K |
|
|
PVBC
3530
DELISTED
Provident Bancorp
PVBC
| $405K | ﹤0.01% |
+48,967
| New | +$369K |
|
3531
ITT
ITT
$17.6B
| $404K | ﹤0.01% |
+4,336
| New | +$364K |
|
3532
CALL
Zeta Global
ZETA
$5.42B
| $404K | ﹤0.01% |
47,400
-18,500
| -28% | -$169K |
|
3533
Zai Lab
ZLAB
$2.11B
| $404K | ﹤0.01% |
+14,582
| New | +$477K |
|
|
SMAR
3534
DELISTED
Smartsheet Inc.
SMAR
| $403K | ﹤0.01% |
+10,554
| New | +$456K |
|
|
AMED
3535
PUT
DELISTED
Amedisys
AMED
| $402K | ﹤0.01% |
4,400
+3,900
| +780% | +$320K |
|
3536
CALL
Equitable Holdings
EQH
$13.5B
| $401K | ﹤0.01% |
14,800
-900
| -6% | -$22.8K |
|
3537
PUT
Sonos
SONO
$1.93B
| $401K | ﹤0.01% |
24,600
-45,100
| -65% | -$800K |
|
3538
PUT
CNX Resources
CNX
$4.81B
| $400K | ﹤0.01% |
22,600
-12,100
| -35% | -$195K |
|
|
TEN
3539
CALL
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $400K | ﹤0.01% |
22,500
+9,400
| +72% | +$165K |
|
3540
CALL
Entergy
ETR
$53B
| $399K | ﹤0.01% |
8,200
+3,600
| +78% | +$187K |
|
|
ARNC
3541
CALL
DELISTED
Arconic Corporation
ARNC
| $399K | ﹤0.01% |
13,500
-249,000
| -95% | -$6.87M |
|
3542
PUT
Essex Property Trust
ESS
$19B
| $398K | ﹤0.01% |
1,700
+200
| +13% | +$43.7K |
|
3543
PUT
Seres Therapeutics
MCRB
$46.5M
| $398K | ﹤0.01% |
4,155
-1,485
| -26% | -$162K |
|
3544
Abercrombie & Fitch
ANF
$4.62B
| $397K | ﹤0.01% |
+10,539
| New | +$300K |
|
3545
PUT
Jefferies Financial Group
JEF
$13.2B
| $397K | ﹤0.01% |
18,200
-18,400
| -50% | -$574K |
|
3546
Fiverr
FVRR
$419M
| $396K | ﹤0.01% |
15,255
+1,188
| +8% | +$35.8K |
|
|
AIV
3547
Aimco
AIV
$378M
| $395K | ﹤0.01% |
46,386
-121,018
| -72% | -$984K |
|
3548
PUT
Antero Midstream
AM
$10.4B
| $395K | ﹤0.01% |
34,100
-8,900
| -21% | -$94.6K |
|
3549
PUT
Ethan Allen Interiors
ETD
$605M
| $395K | ﹤0.01% |
14,000
+7,500
| +115% | +$204K |
|
|
HUYA
3550
CALL
Huya Inc
HUYA
$561M
| $395K | ﹤0.01% |
110,600
-700
| -0.6% | -$2.3K |
|
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.