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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1201
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$162M
| $8.91M | 0.01% |
171,800
-8,750
| -5% | -$501K |
|
1202
PUT
Intercontinental Exchange
ICE
$82.4B
| $8.9M | 0.01% |
64,800
-32,800
| -34% | -$4.36M |
|
1203
CALL
Teladoc Health
TDOC
$1.58B
| $8.9M | 0.01% |
589,600
-159,800
| -21% | -$2.9M |
|
|
PARA
1204
DELISTED
Paramount Global Class B
PARA
| $8.9M | 0.01% |
756,016
-25,660
| -3% | -$323K |
|
1205
CALL
Stellantis
STLA
$16.5B
| $8.89M | 0.01% |
314,200
-86,200
| -22% | -$2.15M |
|
1206
PUT
Fomento Económico Mexicano
FMX
$43.3B
| $8.88M | 0.01% |
68,200
+67,800
| +16,950% | +$8.85M |
|
1207
PUT
Globe Life
GL
$13.5B
| $8.87M | 0.01% |
76,200
+75,800
| +18,950% | +$9.28M |
|
1208
PUT
Tower Semiconductor
TSEM
$26.4B
| $8.87M | 0.01% |
265,100
+14,800
| +6% | +$461K |
|
1209
CALL
BCE
BCE
$19.9B
| $8.87M | 0.01% |
260,900
+133,300
| +104% | +$5.07M |
|
1210
PUT
T. Rowe Price
TROW
$25B
| $8.86M | 0.01% |
72,700
-17,100
| -19% | -$1.91M |
|
1211
CALL
IonQ
IONQ
$12.3B
| $8.84M | 0.01% |
885,300
+325,100
| +58% | +$3.47M |
|
1212
PUT
KE Holdings
BEKE
$16.8B
| $8.79M | 0.01% |
640,100
-337,100
| -34% | -$4.71M |
|
1213
CALL
2x Bitcoin ETF
BITX
$919M
| $8.78M | 0.01% |
164,900
+69,100
| +72% | +$2.39M |
|
1214
CALL
Crown Holdings
CCK
$12.8B
| $8.74M | 0.01% |
110,300
+95,800
| +661% | +$7.84M |
|
1215
CALL
Logitech
LOGI
$15.2B
| $8.74M | 0.01% |
97,800
+5,900
| +6% | +$527K |
|
1216
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $8.73M | 0.01% |
33,329
+18,963
| +132% | +$5.6M |
|
1217
CALL
KeyCorp
KEY
$24.3B
| $8.72M | 0.01% |
551,700
-93,000
| -14% | -$1.34M |
|
1218
CALL
BILL Holdings
BILL
$4.33B
| $8.69M | 0.01% |
126,500
-217,000
| -63% | -$15.2M |
|
1219
PUT
Beyond Meat
BYND
$288M
| $8.69M | 0.01% |
1,049,300
+58,800
| +6% | +$452K |
|
1220
CALL
FIVE9
FIVN
$1.77B
| $8.68M | 0.01% |
139,700
+20,500
| +17% | +$1.42M |
|
1221
Sarepta Therapeutics
SRPT
$1.66B
| $8.64M | 0.01% |
66,780
+34,561
| +107% | +$4.23M |
|
|
LSXMA
1222
CALL
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $8.64M | 0.01% |
234,700
+56,600
| +32% | +$1.7M |
|
1223
PUT
Keysight
KEYS
$54.5B
| $8.63M | 0.01% |
55,200
+100
| +0.2% | +$15.4K |
|
1224
PUT
Duolingo
DUOL
$5.7B
| $8.62M | 0.01% |
39,100
+2,600
| +7% | +$530K |
|
1225
CALL
JetBlue
JBLU
$1.96B
| $8.62M | 0.01% |
1,161,600
-1,150,000
| -50% | -$7.14M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.