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 | |
|---|---|---|---|---|---|---|
3276
CleanSpark
CLSK
$3.6B
| $521K | ﹤0.01% |
121,634
+18,540
| +18% | +$74.5K |
|
3277
PUT
Flywire
FLYW
$1.99B
| $521K | ﹤0.01% |
+16,800
| New | +$504K |
|
3278
PUT
Golar LNG
GLNG
$4.99B
| $520K | ﹤0.01% |
25,800
+13,400
| +108% | +$288K |
|
|
GOEV
3279
CALL
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $520K | ﹤0.01% |
2,362
-742
| -24% | -$212K |
|
3280
CALL
Century Aluminum
CENX
$4.44B
| $519K | ﹤0.01% |
59,600
-45,300
| -43% | -$394K |
|
3281
CALL
BigBear.ai
BBAI
$1.36B
| $518K | ﹤0.01% |
220,500
-20,700
| -9% | -$52.5K |
|
3282
PUT
BorgWarner
BWA
$13.1B
| $518K | ﹤0.01% |
12,042
+6,021
| +100% | +$248K |
|
3283
PUT
Leggett & Platt
LEG
$1.5B
| $518K | ﹤0.01% |
17,500
+11,500
| +192% | +$362K |
|
3284
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$294M
| $518K | ﹤0.01% |
17,644
-202,019
| -92% | -$5.9M |
|
3285
DocGo
DCGO
$62.2M
| $517K | ﹤0.01% |
55,186
+25,944
| +89% | +$228K |
|
|
DRRX
3286
PUT
DELISTED
DURECT Corp
DRRX
| $517K | ﹤0.01% |
104,600
+27,800
| +36% | +$141K |
|
|
OBE
3287
Obsidian Energy
OBE
$660M
| $517K | ﹤0.01% |
88,785
-147,350
| -62% | -$912K |
|
3288
Under Armour Class C
UA
$2.95B
| $517K | ﹤0.01% |
77,150
+28,218
| +58% | +$207K |
|
3289
PUT
Credo Technology Group
CRDO
$38.8B
| $516K | ﹤0.01% |
29,800
+10,700
| +56% | +$127K |
|
3290
Direxion Daily Energy Bull 2X ETF
ERX
$229M
| $516K | ﹤0.01% |
9,439
-10,924
| -54% | -$608K |
|
3291
CALL
Viasat
VSAT
$10.2B
| $515K | ﹤0.01% |
12,500
+10,500
| +525% | +$408K |
|
|
RADI
3292
PUT
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $515K | ﹤0.01% |
34,600
-26,400
| -43% | -$390K |
|
3293
PUT
Boise Cascade
BCC
$2.75B
| $514K | ﹤0.01% |
5,700
-6,000
| -51% | -$438K |
|
3294
CALL
Brookfield Renewable
BEPC
$5.95B
| $513K | ﹤0.01% |
16,300
+6,300
| +63% | +$213K |
|
3295
CALL
Brookfield Renewable
BEP
$9.74B
| $513K | ﹤0.01% |
17,400
-2,000
| -10% | -$61.5K |
|
3296
PUT
Evolv Technologies
EVLV
$980M
| $513K | ﹤0.01% |
+85,600
| New | +$405K |
|
3297
Insmed
INSM
$22.7B
| $512K | ﹤0.01% |
24,304
+23,004
| +1,770% | +$436K |
|
3298
PUT
Geron
GERN
$949M
| $510K | ﹤0.01% |
159,100
+15,100
| +10% | +$43K |
|
3299
CALL
Macerich
MAC
$7.41B
| $510K | ﹤0.01% |
45,300
+2,600
| +6% | +$26.5K |
|
3300
PUT
Woodside Energy
WDS
$41.4B
| $510K | ﹤0.01% |
22,000
+5,800
| +36% | +$133K |
|
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.