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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.25% |
| 2 | Technology | 0.44% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
251
CALL
Verizon
VZ
$208B
| $58.7M | 0.05% |
1,812,300
+331,600
| +22% | +$11.2M |
|
252
PUT
Marvell Technology
MRVL
$201B
| $58.3M | 0.05% |
1,077,600
+12,500
| +1% | +$738K |
|
253
CALL
Suncor Energy
SU
$78.8B
| $58M | 0.05% |
1,687,400
+686,100
| +69% | +$22M |
|
254
CALL
Lowe's Companies
LOW
$115B
| $57.8M | 0.05% |
278,000
+53,400
| +24% | +$12M |
|
255
CALL
Datadog
DDOG
$76.5B
| $57.8M | 0.05% |
634,100
+113,100
| +22% | +$11.2M |
|
256
CALL
Intuit
INTU
$91B
| $57.6M | 0.05% |
112,800
-76,900
| -41% | -$38.9M |
|
257
CALL
Devon Energy
DVN
$52.9B
| $57.5M | 0.05% |
1,205,900
-934,200
| -44% | -$47M |
|
258
CALL
GE Aerospace
GE
$350B
| $57.5M | 0.05% |
727,492
-19,171
| -3% | -$1.72M |
|
|
KFYP
259
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $57.1M | 0.04% |
2,070,000
-54,100
| -3% | -$1.24M |
|
260
PUT
Wynn Resorts
WYNN
$9.43B
| $56.1M | 0.04% |
607,500
-95,300
| -14% | -$9.56M |
|
261
CALL
SLB Ltd
SLB
$85.3B
| $56.1M | 0.04% |
961,600
+56,700
| +6% | +$3.29M |
|
262
PUT
American Airlines Group
AAL
$8.69B
| $55.5M | 0.04% |
4,331,200
+350,400
| +9% | +$5.44M |
|
|
263
PUT
SLB Ltd
SLB
$85.3B
| $55.5M | 0.04% |
951,400
+373,300
| +65% | +$21.6M |
|
|
264
PUT
Lowe's Companies
LOW
$115B
| $55.5M | 0.04% |
266,800
+56,000
| +27% | +$12.6M |
|
|
265
PUT
Devon Energy
DVN
$52.9B
| $55.4M | 0.04% |
1,161,800
+568,000
| +96% | +$28.6M |
|
266
CALL
Deere & Co
DE
$187B
| $55.3M | 0.04% |
146,600
-67,700
| -32% | -$27.9M |
|
267
CALL
Elevance Health
ELV
$88.4B
| $55.2M | 0.04% |
126,800
-24,300
| -16% | -$11M |
|
268
PUT
United Airlines
UAL
$36.2B
| $54.7M | 0.04% |
1,294,000
-706,700
| -35% | -$35.7M |
|
|
X
269
CALL
DELISTED
US Steel
X
| $54.6M | 0.04% |
1,681,400
+1,182,600
| +237% | +$33.2M |
|
270
PUT
3M
MMM
$86.9B
| $54.5M | 0.04% |
696,072
-169,712
| -20% | -$14.6M |
|
271
CALL
RH
RH
$2.8B
| $54.2M | 0.04% |
205,100
+108,400
| +112% | +$37.7M |
|
272
PUT
Bristol-Myers Squibb
BMY
$136B
| $53.9M | 0.04% |
928,900
+228,000
| +33% | +$14M |
|
273
PUT
Amgen
AMGN
$236B
| $53.8M | 0.04% |
200,200
+35,500
| +22% | +$8.86M |
|
|
HES
274
PUT
DELISTED
Hess
HES
| $53.7M | 0.04% |
351,300
+129,000
| +58% | +$19.4M |
|
275
CALL
Spotify
SPOT
$112B
| $53.4M | 0.04% |
345,000
+144,500
| +72% | +$22M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading's Q3 2023 filing shows 1,401 new, 3,688 increased, 3,363 reduced and 1,719 closed positions. Its largest new stake was Amazon: 841,102 shares worth $107M. The largest sale was Netflix, an estimated $27.1M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,401 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.