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 | |
|---|---|---|---|---|---|---|
3251
CALL
OGE Energy
OGE
$10.2B
| $531K | ﹤0.01% |
14,800
-7,600
| -34% | -$280K |
|
3252
PUT
Varonis Systems
VRNS
$5.36B
| $530K | ﹤0.01% |
19,900
-1,400
| -7% | -$35K |
|
|
ESMT
3253
DELISTED
EngageSmart, Inc.
ESMT
| $530K | ﹤0.01% |
27,766
+6,717
| +32% | +$119K |
|
|
EGLE
3254
DELISTED
Eagle Bulk Shipping Inc.
EGLE
| $530K | ﹤0.01% |
11,044
+4,820
| +77% | +$213K |
|
3255
LiveWire
LVWR
$498M
| $528K | ﹤0.01% |
44,763
+44,762
| +4,476,200% | +$372K |
|
3256
Dolby
DLB
$4.85B
| $527K | ﹤0.01% |
6,309
-9,684
| -61% | -$809K |
|
3257
PUT
Royal Gold
RGLD
$17.1B
| $527K | ﹤0.01% |
4,600
-6,200
| -57% | -$798K |
|
|
TELL
3258
DELISTED
Tellurian Inc.
TELL
| $527K | ﹤0.01% |
373,789
-18,184
| -5% | -$24.5K |
|
3259
CALL
Alphatec Holdings
ATEC
$1.33B
| $526K | ﹤0.01% |
29,300
-20,300
| -41% | -$316K |
|
3260
CALL
Babcock & Wilcox
BW
$1.4B
| $526K | ﹤0.01% |
89,200
-36,800
| -29% | -$216K |
|
3261
CALL
Grocery Outlet
GO
$932M
| $526K | ﹤0.01% |
17,200
-900
| -5% | -$26.3K |
|
3262
PUT
Immersion
IMMR
$256M
| $526K | ﹤0.01% |
74,400
-100
| -0.1% | -$740 |
|
|
VPU
3263
Vanguard Utilities ETF
VPU
$8.72B
| $526K | ﹤0.01% |
3,705
+1,936
| +109% | +$284K |
|
|
EDR
3264
CALL
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $526K | ﹤0.01% |
22,000
-138,900
| -86% | -$3.27M |
|
3265
PUT
Gulfport Energy Corp
GPOR
$2.77B
| $525K | ﹤0.01% |
+5,000
| New | +$464K |
|
3266
CALL
Medifast
MED
$110M
| $525K | ﹤0.01% |
5,700
+1,000
| +21% | +$89K |
|
3267
CALL
Teucrium Agricultural Fund
TAGS
$19.2M
| $525K | ﹤0.01% |
42,000
-61,600
| -59% | -$1.91M |
|
3268
CALL
Arrowhead Research
ARWR
$12B
| $524K | ﹤0.01% |
14,700
-16,100
| -52% | -$555K |
|
3269
CALL
American Coastal Insurance
ACIC
$505M
| $523K | ﹤0.01% |
117,400
+114,700
| +4,248% | +$495K |
|
3270
PagSeguro Digital
PAGS
$2.62B
| $523K | ﹤0.01% |
55,488
-1,534
| -3% | -$15.5K |
|
3271
Charles River Laboratories
CRL
$10.8B
| $522K | ﹤0.01% |
+2,487
| New | +$495K |
|
3272
Lantheus
LNTH
$7.03B
| $522K | ﹤0.01% |
+6,225
| New | +$559K |
|
3273
PUT
Liquidia Corp
LQDA
$7.51B
| $522K | ﹤0.01% |
66,500
+44,300
| +200% | +$344K |
|
|
NATI
3274
CALL
DELISTED
National Instruments Corp
NATI
| $522K | ﹤0.01% |
9,100
-22,300
| -71% | -$1.28M |
|
3275
PUT
Benchmark Electronics
BHE
$2.86B
| $521K | ﹤0.01% |
+20,200
| New | +$467K |
|
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.