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 | |
|---|---|---|---|---|---|---|
3476
PUT
BBVA Argentina
BBAR
$3.82B
| $424K | ﹤0.01% |
69,300
+4,800
| +7% | +$23K |
|
3477
PUT
eHealth
EHTH
$43.8M
| $424K | ﹤0.01% |
52,800
+5,200
| +11% | +$41.6K |
|
3478
CALL
Sonos
SONO
$1.93B
| $424K | ﹤0.01% |
26,000
-7,400
| -22% | -$131K |
|
3479
CALL
Eldorado Gold
EGO
$8.28B
| $423K | ﹤0.01% |
41,900
+13,800
| +49% | +$146K |
|
3480
CALL
Black Diamond Therapeutics
BDTX
$100M
| $422K | ﹤0.01% |
83,700
+83,100
| +13,850% | +$170K |
|
3481
PUT
Century Aluminum
CENX
$4.34B
| $422K | ﹤0.01% |
48,500
-700
| -1% | -$6.08K |
|
3482
Emergent Biosolutions
EBS
$373M
| $422K | ﹤0.01% |
57,515
+30,047
| +109% | +$279K |
|
3483
TH International
THCH
$55.4M
| $422K | ﹤0.01% |
29,436
+29,317
| +24,636% | +$527K |
|
3484
PUT
US Foods
USFD
$22.4B
| $422K | ﹤0.01% |
9,600
-449,500
| -98% | -$17.8M |
|
3485
CALL
Pembina Pipeline
PBA
$29B
| $421K | ﹤0.01% |
13,400
-3,400
| -20% | -$109K |
|
3486
CALL
Xerox
XRX
$354M
| $421K | ﹤0.01% |
28,300
-100
| -0.4% | -$1.46K |
|
|
DEN
3487
DELISTED
Denbury Inc.
DEN
| $421K | ﹤0.01% |
4,882
+603
| +14% | +$54.6K |
|
3488
CALL
SandRidge Energy
SD
$490M
| $420K | ﹤0.01% |
27,600
-29,100
| -51% | -$427K |
|
|
JOYY
3489
CALL
JOYY Inc
JOYY
$3.79B
| $420K | ﹤0.01% |
13,700
+12,600
| +1,145% | +$369K |
|
|
SAND
3490
CALL
DELISTED
Sandstorm Gold
SAND
| $419K | ﹤0.01% |
81,900
+39,800
| +95% | +$222K |
|
3491
PUT
Unum
UNM
$14B
| $419K | ﹤0.01% |
8,800
-38,200
| -81% | -$1.67M |
|
3492
CALL
Amplitude
AMPL
$1.18B
| $418K | ﹤0.01% |
38,000
-18,000
| -32% | -$194K |
|
3493
CALL
FTI Consulting
FCN
$5B
| $418K | ﹤0.01% |
2,200
-700
| -24% | -$132K |
|
3494
PUT
Jack Henry & Associates
JKHY
$11.2B
| $418K | ﹤0.01% |
2,500
-1,400
| -36% | -$218K |
|
3495
PUT
Mueller Industries
MLI
$14.6B
| $418K | ﹤0.01% |
19,200
+400
| +2% | +$7.6K |
|
3496
PUT
Root
ROOT
$952M
| $418K | ﹤0.01% |
46,800
+28,500
| +156% | +$158K |
|
3497
iShares MSCI ACWI ETF
ACWI
$32.4B
| $417K | ﹤0.01% |
+4,353
| New | +$404K |
|
|
TRTN
3498
DELISTED
Triton International Limited
TRTN
| $417K | ﹤0.01% |
5,012
+4,261
| +567% | +$345K |
|
|
CIVI
3499
CALL
DELISTED
Civitas Resources
CIVI
| $416K | ﹤0.01% |
6,000
-900
| -13% | -$62.3K |
|
3500
PUT
Ecopetrol
EC
$32.3B
| $416K | ﹤0.01% |
40,600
+22,200
| +121% | +$224K |
|
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.